USPS Sunday: Why 7-Day Delivery Is the New Normal

Weekend delivery services aren’t just a premium anymore — they’ve become the norm. With Amazon delivering on Sundays, food apps running 24/7, and customers demanding speed, the pressure is on for traditional carriers like the United States Postal Service (USPS) to keep up.

That shift in consumer behavior is exactly why USPS Sunday delivery is now a real thing. It’s no longer just a question of whether the post office is open — it’s about how fast and reliably USPS can deliver when people want their packages. However, USPS does not deliver mail and packages equally on Sundays; Sunday mail delivery is limited to Priority Mail Express and certain Amazon packages, while most regular mail is not delivered.

And for businesses? Sunday mail delivery is changing expectations, requiring companies to rethink campaign timing, shipping guarantees, and even how to talk about delivery speed in marketing.

This article breaks down what’s really possible with Sunday delivery, including which USPS services qualify (hint: it’s not most of them), how much USPS Sunday delivery costs, and what to expect if you’re mailing something urgent over the weekend.

💡 Running time-sensitive campaigns? LettrLabs’ automation tools help you control exactly when your mail arrives — even around weekends and holidays.

Does USPS Deliver on Sunday? Here's What You Need to Know

The short answer: Yes, USPS delivers on Sunday — but only under specific circumstances. USPS does not deliver mail on Sundays except for certain services, such as Priority Mail Express and some Amazon packages.

The United States Postal Service doesn’t operate like a 24/7 courier. Most USPS delivery services, like First Class Mail, Retail Ground, or Standard Mail, are strictly Monday through Saturday. USPS deliver packages on weekends is limited to specific services, mainly Priority Mail Express and Amazon shipments. That means if you’re sending everyday letters or marketing materials, they won’t show up on a Sunday.

But there are two major exceptions where Sunday deliveryis part of the schedule:

1. Priority Mail Express – USPS’s premium, overnight service with a guaranteed delivery date, including Sundays in many areas. Customers can expect Priority Mail to arrive on Sundays only in limited or high-volume areas, as USPS deliver priority mail on Sundays is not available everywhere.
2. Amazon packages – USPS has a longstanding partnership with Amazon and often delivers their orders on Sundays, even if it doesn’t offer that option to the general public.

So while USPS doesn’t deliver everything on Sunday, it does deliver under the right service type or with the right fulfillment partner. When packages arrive on Sundays, it is usually through Priority Mail Express or Amazon deliveries in eligible locations.

💡 Sending something that absolutely needs to arrive on a Sunday? If you’re mailing to consumers, LettrLabs’ handwritten cards or printed letters work best when scheduled around USPS weekend service windows.

USPS Delivery Options Available on Sunday

Not every postal service runs on Sundays — and even USPS Sunday delivery isn’t universal. In fact, there are only a couple of delivery services offered by the United States Postal Service that qualify for Sunday arrival. Typically, priority mail express deliveries and Amazon packages are the main items delivered on Sundays.

Let’s break down the two main options: only priority mail express items and Amazon packages are eligible for Sunday delivery.

On Sundays, a different mail carrier may handle deliveries compared to regular weekdays.

1. Priority Mail Express: USPS’s Fastest Guaranteed Delivery Service

If you need something delivered on a Sunday, Priority Mail Express is your most reliable option. It’s the only USPS service that guarantees overnight delivery — including Sundays — to most U.S. addresses.

Here’s what sets Priority Mail Express apart:

• 7-day delivery, including holidays
• Money back guarantee if it arrives late
• USPS tracking included
• Available for flat-rate or weight-based pricing. Priority Mail Express starts at a specific price point, and additional fees may apply for certain features such as Sunday or holiday delivery.
• Sunday delivery is included at no extra cost

For urgent legal documents, last-minute ecommerce orders, or high-priority shipments, this is USPS’s top-tier service. You can deliver Priority Mail Express 365 days a year — including Sundays — in most metro areas.

For international urgent shipments, Priority Mail Express International is available, offering delivery to over 190 countries in three to five business days, with tracking and insurance included. This premium service is ideal for time-sensitive global deliveries.

2. Amazon Sunday Delivery via USPS

You might’ve noticed an Amazon package showing up on your doorstep on a Sunday. That’s because USPS has a dedicated contract with Amazon, and delivers Amazon parcels — in fact, usps deliver amazon packages even on Sundays as part of this collaboration — often using their Priority Mail Express service level — even when other mail doesn’t move.

But keep in mind:

• You can’t access this service yourself — it’s exclusive to Amazon
• It’s not tracked under the standard USPS delivery schedule
• You won’t see this option when shipping via the local post office

So while USPS delivers Amazon packages on Sunday, it’s not available to most senders unless you’re part of Amazon’s fulfillment system.

💡 If you’re a business and need more control over delivery speed, LettrLabs’ postcard campaigns can be scheduled around USPS delivery days — including weekends — so you always hit the right timing window.

How USPS Priority Mail Express Works

When it comes to Sunday delivery, Priority Mail Express is the gold standard. It’s the only USPS service that offers overnight shipping, even on weekends and federal holidays — with a money back guarantee if your package is late.

Let’s take a closer look at how this premium USPS option operates. A USPS package sent via Priority Mail Express is specially handled for Sunday delivery, with tracking available every step of the way to ensure your package arrives on time.

What Is Priority Mail Express?

USPS Priority Mail Express is not the same as regular Priority Mail. While both are fast, only Priority Mail Express guarantees overnight shipping and includes Sunday delivery in eligible ZIP codes.

Key features:

• Delivery 7 days a week, including Sundays and holidays
• Guaranteed delivery date (often by 6:00 p.m.)
• Up to $100 insurance included
• Free USPS pickup available
• Full USPS tracking provided
• Delivery to PO Boxes, residential, and commercial addresses

If you’re shipping Priority Mail Express packages, make sure the destination qualifies for Sunday arrival — not all locations do. Mail carriers assigned to Sunday delivery routes may be different from those who deliver on weekdays, which can affect delivery times and routes.

What Does Priority Mail Express Cost for Sunday Delivery?

Wondering about USPS Sunday delivery cost? Good news: there’s no extra fee just for choosing a Sunday. However, extra fees may apply for other special services or delivery options, such as certain weekend or holiday deliveries. As long as your address qualifies, the Sunday option is included in the base Priority Mail Express pricing.

That said, prices are still significantly higher than other USPS options:

• Starts at $28.75 and goes up depending on weight and zone. The exact cost for Sunday delivery with USPS service depends on the specific service selected, the delivery destination, and the package weight.
• Flat Rate envelopes are cheaper for smaller, lighter shipments
• Delivery to rural or extended areas may take longer — and may not include Sundays

Compared to Sunday delivery, USPS Saturday delivery cost is typically the same as regular weekday delivery, since Saturday is a regular business day for USPS and does not incur additional fees.

💡 Want to avoid paying express prices? Schedule campaign mail in advance using LettrLabs’ direct mail automation to land in homes just before or after the weekend, without rush fees.

USPS Sunday Delivery Cost: What You’ll Pay (and What’s Included)

One of the most common questions about USPS Sunday delivery services is: “How much does it cost?”

The answer depends entirely on the service type — because again, not all USPS delivery services operate on Sundays.

Here’s a breakdown of how Sunday delivery pricing works across USPS:

Sunday Delivery with Priority Mail Express

If you're using Priority Mail Express, Sunday delivery is already baked into the price. There’s no separate Sunday fee, which makes it more straightforward — but still expensive compared to other options.

• Starting cost: $28.75 (for flat rate envelopes)
• No extra charge for Sunday delivery
• Money back guarantee if late
• Includes tracking, insurance, and signature options

This is USPS’s fastest guaranteed delivery service, and the only one that includes Sunday delivery outside of Amazon’s internal logistics network.

Do Other USPS Services Offer Sunday Delivery?

No — services like Priority Mail, First Class Mail, Retail Ground, and USPS packages shipped through regular channels do not qualify for Sunday delivery. That means:

• Standard mail will wait until Monday
• You can’t pay a “rush” fee to get regular mail delivered on Sunday
• Only Priority Mail Express and Amazon deliveries qualify

So when planning delivery timing, the only service that guarantees Sunday arrival for the general public is Priority Mail Express.

💡 Looking for affordable alternatives to express shipping? LettrLabs' pricing options offer better control over timing — without the high cost of overnight delivery.

USPS Weekend Delivery Services: Saturday & Sunday Explained

The USPS weekend delivery schedule can be confusing — especially with all the different mail classes and service levels. So let’s clear it up. USPS weekend deliveries differ between Saturday and Sunday, with Saturday being a regular delivery day for most mail types, while Sunday deliveries are limited to select services and locations.

Yes, USPS delivers on Saturday. USPS Saturday is considered a standard business day, and most regular mail and packages are delivered as usual. And yes, USPS delivers on Sunday — but only in limited cases.

Here’s how Saturday and Sunday deliveries really work, and what you can expect. Typical Saturday delivery hours are generally between 9:00 AM and 5:00 PM, but these hours may vary depending on your local post office and service type.

Saturday Delivery: What USPS Treats as a Standard Delivery Day

Unlike many private carriers, USPS treats Saturday like a normal business day. That means:

• First Class Mail, Priority Mail, and even some bulk mail are delivered on Saturdays
• There’s no extra fee for Saturday delivery
• Post offices are typically open for limited hours on Saturdays

This makes Saturday delivery a reliable part of most USPS timelines — especially for marketers, small businesses, and ecommerce shops.

📦 USPS delivery on Saturday includes:

• Priority Mail packages
• First Class Mail
• Retail Ground
• Most USPS shipping services, unless restricted by zone or carrier availability

Sunday Delivery: Limited, But Growing

As we covered earlier, Sunday delivery is only available through:

• Priority Mail Express
• Amazon packages delivered via USPS

No other mail class qualifies. That means if you’re using standard mail, USPS Retail Ground, or even Priority Mail, Sunday is not an option.

This split between Saturday and Sunday service is what confuses most senders. But here’s the short version:

✅ Saturday = Normal USPS delivery
🚫 Sunday = Priority Mail Express or Amazon only

💡 Want help timing your marketing to avoid USPS blackouts? LettrLabs’ delivery tracking tools let you optimize campaigns based on live USPS delivery schedules — including weekends.

Which USPS Services Qualify for Weekend Delivery?

To make the most of USPS weekend services, you need to understand which shipping types qualify for Saturday and Sunday deliveries — and which don’t.

Spoiler: Most USPS delivery services will show up on a Saturday, but only a select few work for Sunday.

Let’s break it down: For certain USPS services, you can manage the scheduled delivery date, allowing you to reschedule a missed delivery, request early pickup, or hold your usps package at the post office before the original delivery date—especially useful for time-sensitive shipments.

Eligible for Saturday Delivery

These USPS shipping services typically deliver on Saturday without any additional fees:

• Priority Mail
• First Class Mail
• USPS Retail Ground
• Bulk mail (depending on presort level and entry point)
• Marketing Mail
• Priority Mail packages with 1–3 day delivery windows

Saturday is treated like a regular mail delivery day — your local post office will often be open, and carriers make their rounds as usual.

Eligible for Sunday Delivery

Only two delivery options qualify for Sunday delivery:

1. Priority Mail Express
2. Amazon packages (through USPS’s contract with Amazon)

That’s it.

📦 So if you’re wondering whether USPS delivers First Class Mail on Sunday, or whether you can deliver Priority Mail over the weekend — the answer is no, unless you upgrade to Priority Mail Express.

Summary of Weekend Delivery Eligibility

💡 Need to control when your mail hits — without relying on USPS to guess right? LettrLabs' direct mail formats let you schedule campaigns that land with perfect timing, every time.

USPS Sunday Delivery Services: Where & How to Access Them

Not all areas qualify for USPS Sunday delivery services — and not all post offices are equipped to support them. So before you rely on Sunday arrival, it’s important to understand the delivery destination, your local post office’s capabilities, and how to access these services.

If you have questions about Sunday delivery eligibility in your area, contact USPS customer support for assistance.

Where Does USPS Deliver on Sundays?

USPS Sunday delivery is typically available in:

• Major metropolitan areas
• Densely populated suburban regions
• Locations with high Amazon package volume

It’s less common (or unavailable) in:

• Rural ZIP codes
• Remote towns
• Areas without USPS distribution centers nearby

If you're sending Priority Mail Express packages, you’ll need to check if the delivery destination is eligible for Sunday service.

Use the USPS website or visit your local post office to confirm.

How to Access Sunday Delivery Services

If you want your package delivered on a Sunday, here’s how to do it right:

1. Select Priority Mail Express as your shipping method
2. Print your label online or ship directly from a post office
3. Double-check the guaranteed delivery date before confirming
4. Drop off the package before the cutoff time (varies by location)

Many USPS locations support Priority Mail Express shipments seven days a week, but USPS weekend delivery services aren’t universally available — especially on Sunday.

💡 Want to automate campaigns that skip weekends or hit mailboxes just before Sunday? LettrLabs’ delivery scheduling tools let you map mail drops with surgical precision — no guessing required.

Post Offices and Sunday Package Pickup

Can You Pick Up Packages at the Post Office on Sunday?

If you’re hoping to swing by your local post office to pick up a package on a Sunday, you’ll likely be out of luck. Most post offices across the United States are closed on Sundays, which means standard package pickup services aren’t available. While a handful of post offices in major metropolitan areas may offer limited lobby access or have automated parcel lockers, this is the exception—not the rule. If you’re expecting a time-sensitive delivery, it’s always best to check directly with your local post office about their specific Sunday hours and any special pickup options they might offer. For most customers, though, Sunday package pickup simply isn’t an option.

How Sunday Package Pickup Works

When it comes to Sunday delivery, the United States Postal Service (USPS) focuses on getting packages straight to your door. If your package is scheduled for Sunday delivery—typically through Priority Mail Express or as part of an Amazon shipment—a USPS carrier will attempt to deliver it to your address. If the delivery requires a signature and you’re not home, the postal service will leave a notice with instructions for next steps. In these cases, you’ll usually need to wait until the next business day, Monday, to pick up your package at the local post office or arrange for redelivery. Since post offices are closed on Sundays, in-person pickup for missed deliveries will have to wait until regular business hours resume.

Tracking and Insurance for Sunday Deliveries

How to Track Your Sunday Delivery

Staying updated on your Sunday delivery is easy with USPS tracking. Every Priority Mail Express package—USPS’s primary service for Sunday deliveries—comes with full tracking included. As soon as your shipment is on its way, you’ll receive a tracking number that you can enter on the USPS website or in the USPS mobile app. This lets you monitor your package’s journey in real time, from acceptance at the post office to final delivery at your doorstep. For added peace of mind, Priority Mail Express packages also include built-in insurance coverage, protecting your shipment against loss or damage up to a set value. If you’re sending high-value items, you can purchase additional insurance for extra protection. Whether you’re shipping with Priority Mail Express or another eligible service, USPS tracking and insurance help ensure your Sunday delivery arrives safely and on schedule.

How to Use USPS for Time-Sensitive Weekend Mailing

When you’re facing a deadline — whether it’s a legal document, a customer order, or a high-ticket product — knowing how to time your weekend delivery matters. USPS can deliver mail and deliver packages on weekends, but this is typically limited to Priority Mail Express and certain Amazon packages for Sunday delivery, while Saturday delivery covers most regular mail and packages.

And if you’re mailing something urgent, USPS Priority Mail Express is your best bet.

But even then, not all USPS weekend delivery services are created equal. Here’s how to make sure your mail gets where it needs to go — on time.

When to Choose Priority Mail Express

If you need guaranteed delivery on a weekend, Priority Mail Express is your go-to. It's the fastest guaranteed delivery service USPS offers — and it's the only service that delivers mail on Sunday (outside of Amazon).

Use Priority Mail Express for:

• Legal documents with strict due dates
• Ecommerce orders with promised 2-day delivery windows
• VIP or high-ticket sales that require urgent handling
• Time-sensitive marketing campaigns with a narrow launch window

While Priority Mail and First Class Mail can work for Saturday, they do not qualify for Sunday.

How to Schedule a Sunday Delivery

To ensure your shipment arrives on Sunday:

1. Choose Priority Mail Express at checkout or in person
2. Use the USPS website to verify Sunday delivery is available for the destination ZIP
3. Drop off before cutoff time (usually early afternoon Saturday)
4. Clearly mark the package and verify the guaranteed delivery date on your receipt

💸 Reminder: USPS Sunday delivery cost is included with Priority Mail Express — there’s no additional fee for Sunday arrival.

💡 For outbound marketing and lead gen campaigns, LettrLabs’ outbound lead generation tools let you plan your message timing so it hits before the weekend — or right after it for maximum engagement.

USPS Customer Service & Support for Weekend Deliveries

Even with the best planning, things can go wrong — especially with weekend delivery. If your package is delayed, the guaranteed delivery date wasn’t met, or you’re unsure whether your local ZIP qualifies for USPS Sunday delivery services, you’ll need help fast.

Here’s how to get it.

How to Contact USPS Customer Service

The easiest way to resolve an issue or ask about delivery options is to contact USPS customer service directly. You have a few options:

• 📞 Phone: 1-800-ASK-USPS (1-800-275-8777)
• 💻 Online: Use the help form on the USPS website
• 🏤 In Person: Visit your local post office to ask about Priority Mail Express options and availability

If you’re dealing with a Priority Mail Express shipment, be sure to have your receipt and USPS tracking number ready. That’s what they’ll use to verify the guaranteed delivery date and determine if you qualify for a money back guarantee.

What If Your Sunday Delivery Is Late?

If your Priority Mail Express package arrives late on a Sunday (or doesn’t arrive at all), you may be eligible for a refund. USPS will evaluate:

• The delivery destination ZIP
• The drop-off time and location
• Whether the delay was avoidable or caused by weather/force majeure

If the package missed its guaranteed delivery date without valid exception, USPS will issue a refund — but you must initiate the request, usually within 30 days.

💡 Need help coordinating high-volume sends or rerouting mail campaigns in real time? LettrLabs’ integrations connect with your CRM, ecommerce store, and more — giving you control from send to delivery.

USPS Sunday Delivery for Businesses: What You Need to Know

If you’re running an ecommerce brand, subscription service, or high-ticket sales operation, weekend delivery services can directly impact your bottom line. And while Saturday and Sunday deliveries are becoming more common, most businesses still don’t take full advantage of what USPS Sunday delivery can offer — or avoid. Leveraging USPS weekend deliveries—including selective Sunday routes and choosing the right shipping method like Priority Mail Express—can give your business a competitive edge by ensuring timely package arrivals for customers.

Let’s break down why this matters.

Why Sunday Delivery Can Be a Competitive Advantage

Customers don’t think about carrier schedules. They only notice one thing: Did the package arrive when I expected it?

If your competitor is offering 2-day delivery that includes the weekend — and you’re not — you’re already behind. Using Priority Mail Express (when needed) can:

• Save sales that might otherwise fall through
• Improve customer reviews and trust
• Help you meet guaranteed delivery date promises during peak seasons

This is especially true during BFCM, holiday sales, or emergency-replacement use cases.

The Risks of Relying on Sunday Delivery

While USPS Sunday delivery services are powerful, they’re also limited:

• Only available via Priority Mail Express
• Not guaranteed in rural ZIP codes
• More expensive than weekday shipping
• No Sunday arrival for standard mail, First Class Mail, or Priority Mail

In other words, if your fulfillment pipeline relies on weekend delivery, you need to build backup plans — or avoid Sunday altogether by mailing ahead of time.

💡 Want more control over delivery timing and format? LettrLabs’ handwritten mailers and automation tools give you full command over how and when your message hits — no rush fees required.

Is USPS Sunday Delivery Worth It for You?

USPS Sunday delivery isn’t available for everything — but when it matters, it matters a lot.

If you're a business trying to stand out with fast shipping, or an individual sending something time-sensitive, Priority Mail Express offers true 7-day coverage with a guaranteed delivery date and full USPS tracking. And for Amazon customers, USPS’s weekend support makes Prime deliveries even more convenient.

But there are also limits:

• Only Priority Mail Express and Amazon packages qualify
• First Class Mail, standard mail, and most postal services won’t move on Sunday
• The USPS Sunday delivery cost is baked into express service — which can be pricey

If your mail doesn’t need to land on a Sunday, it may be smarter to plan around it instead. That’s where tools like automated mail scheduling, delivery analytics, and format control can make all the difference.

💡 Want to skip the guesswork? LettrLabs helps you build, send, and track high-performing direct mail — with full control over delivery windows, formats, and timing.