The best way to ship a package depends on three things: its weight, its size and how fast it has to arrive. For most packages under 70 pounds that aren’t urgent, USPS Ground Advantage (2–5 days) or UPS Ground (1–5 business days) is the best fit. Choose Priority Mail or a UPS air service when speed matters, and UPS when the package is over 70 pounds.
No single carrier is best for everything. USPS tends to win on light packages and residential delivery, UPS on heavy and large boxes, and the right choice for any one shipment comes from matching the package to the service. This guide gives you that matching process, step by step.
How do you choose the best way to ship a package?
Work through these questions in order. Each one narrows the options.
- How much does it weigh? USPS caps packages at 70 pounds. Anything heavier goes by UPS (up to 150 pounds per package) or by freight above that.
- How big is it? Measure length, width and height. Large, light boxes are billed by dimensional weight, which can make a different carrier cheaper.
- When does it need to arrive? Ground services take up to five days. Faster arrival means Priority Mail, Priority Mail Express or a UPS air service.
- Where is it going? USPS delivers to P.O. Boxes and military APO/FPO addresses. UPS’s standard services don’t, although UPS Ground Saver can reach them by handing packages to USPS for final delivery.
- How valuable is it? Check what coverage comes included and add more for anything valued over $100.
Which shipping service fits your package?
| Package profile | Usually the best fit | Why |
|---|---|---|
| Under 1 lb, not urgent | USPS Ground Advantage | Built for lightweight parcels; tracking and up to $100 insurance included |
| Small but heavy (dense items) | USPS Priority Mail Flat Rate or cubic pricing | Flat Rate is priced by box, not weight, up to 70 lb; cubic is priced by size for small parcels up to 20 lb |
| 1–70 lb, ground speed is fine | Compare USPS Ground Advantage and UPS Ground | Either can win depending on weight, zone and box size |
| Over 70 lb | UPS Ground | USPS’s limit is 70 lb; UPS accepts up to 150 lb |
| Needs to arrive in 1–3 days | Priority Mail Express or UPS Next Day Air / 2nd Day Air | Fastest options; Priority Mail Express includes a money-back guarantee, with exceptions |
| Books and other media | USPS Media Mail | Restricted to eligible media; slower (2–8 days) |
| Over 150 lb or a pallet | LTL freight | Beyond parcel carrier limits |
How do USPS and UPS services compare?
These are the main domestic services from both carriers, with the delivery commitment and size limits each one publishes.
| Service | Delivery commitment | Max weight | Max size |
|---|---|---|---|
| USPS Ground Advantage | 2–5 days | 70 lb | 130 in length + girth |
| USPS Priority Mail | 2–3 days (expected, not guaranteed) | 70 lb | 108 in length + girth |
| USPS Priority Mail Express | 1–3 days to many major markets, money-back guarantee | 70 lb | 108 in length + girth |
| USPS Media Mail | 2–8 days | 70 lb | 108 in length + girth |
| UPS Ground | 1–5 business days | 150 lb | 108 in long, 165 in length + girth |
| UPS 3 Day Select | 3 business days | 150 lb | 108 in long, 165 in length + girth |
| UPS 2nd Day Air | 2 business days | 150 lb | 108 in long, 165 in length + girth |
| UPS Next Day Air | Next business day | 150 lb | 108 in long, 165 in length + girth |
For a closer look at the two most common USPS options, see our comparison of USPS Priority Mail vs Ground Advantage. If you’re weighing UPS’s ground timing, our guide on how long UPS Ground takes explains transit days by distance.
When is USPS the best way to ship?
USPS is usually the better choice for light packages, residential addresses and destinations UPS can’t reach. Ground Advantage, which replaced First-Class Package Service in July 2023, covers parcels up to 70 pounds with tracking and up to $100 of insurance included. Priority Mail adds speed and free USPS boxes and envelopes.
For small, heavy items, Priority Mail Flat Rate charges by the box rather than the weight, so a dense item that fits the box can ship efficiently anywhere in the country. Our guide to USPS flat rate shipping explains when the boxes pay off. USPS also offers free package pickup from your home or office.
When is UPS the best way to ship?
UPS is the stronger option for heavy and large packages, for business-to-business shipments and for anything over USPS’s 70-pound limit. UPS Ground handles packages up to 150 pounds, and its time-definite air services give firm delivery days when a deadline matters.
Watch UPS’s surcharge thresholds on bulky items. Packages over 50 pounds, with a longest side over 48 inches, or more than 105 inches in length plus girth pick up an Additional Handling charge. Our overview of UPS size and weight limits lists every threshold.
How do size and dimensional weight change the best option?
Both carriers bill large, light packages by dimensional weight: length × width × height divided by 139. UPS uses that divisor at daily rates, and since July 12, 2026 USPS applies it to Ground Advantage and Priority Mail packages larger than 1 cubic foot. A 16 × 16 × 16 inch box of pillows weighing 5 pounds is billed as 30 pounds (4,096 ÷ 139 = 29.5, rounded up).
The practical rule is to use the smallest box that protects the item. Our explainer on dimensional weight at UPS shows how to calculate it before you pack.
How do you get the best price on the method you pick?
Once you know which service fits, the remaining question is what you pay for it. Retail counter rates are the highest you can pay. ParcelPath is free to use, with no subscription, per-label fees or minimums, and offers up to 85% off UPS and up to 89% off USPS retail rates. You can compare both carriers for your package’s weight, size and destination in the ParcelPath rate calculator.
No printer? Use a UPS Mobile Barcode at a UPS Store or a USPS Label Broker code at the Post Office counter. If price is your only concern, our guide to the cheapest way to ship a package goes deeper on low-cost options, and our step-by-step guide on how to ship a package covers packing and labeling from start to finish.
What is the best way to ship specific items?
Some items have their own best method. Soft goods like apparel ship well in poly mailers. Our guide to the best way to ship clothes covers that case. Books qualify for Media Mail. For packages leaving the country, our guide to the best way to ship internationally covers USPS and UPS international services and customs forms. More item-by-item walkthroughs are in our shipping how-to guides.
Frequently Asked Questions
What is the best way to ship a small package?
For a small package under 1 pound, USPS Ground Advantage is usually the best way to ship. It delivers in 2 to 5 days and includes tracking and up to $100 of insurance. If the package needs to arrive faster, Priority Mail’s expected delivery is 2 to 3 days. Compare both against UPS Ground for your destination.
What is the best way to ship a heavy package?
For packages over 70 pounds, UPS is the best way to ship because USPS doesn’t accept anything heavier. UPS Ground handles up to 150 pounds per package, though packages over 50 pounds pick up an Additional Handling charge. Above 150 pounds, or for several heavy boxes, LTL freight on a pallet is usually the better option.
What is the fastest way to ship a package?
Among USPS and UPS services, UPS Next Day Air delivers the next business day, and USPS Priority Mail Express delivers in 1 to 3 days to many major markets with a money-back guarantee, with some exceptions. UPS 2nd Day Air and USPS Priority Mail (an expected 2 to 3 days) are the next tier.
Is USPS or UPS better for shipping a package?
Neither is better for every package. USPS usually wins for light parcels, residential addresses, P.O. Boxes and military APO/FPO destinations, while UPS is stronger for heavy or large boxes and anything over 70 pounds. The reliable way to decide is to compare both carriers’ quotes for your package’s actual weight, dimensions and destination.
Sources
- USPS: Mail and shipping services (delivery times, weight limits, included insurance)
- USPS Ground Advantage: size limits and dimensional weight
- UPS Rate and Service Guide (Daily Rates): services, size and weight limits, Additional Handling
- UPS: Shipping dimensions and weight
Part of our How to Guides guide. Related: How to Ship Multiple Packages, Shipping Process, Shipping with Ease.
