The fast summary
United's baggage policy is one of the most-searched in the U.S. — and one of the easiest to misread. Most travelers get tripped up by three things: the Basic Economy carry-on restriction, the difference between domestic and long-haul international allowances, and the way overweight and oversize fees stack on top of the bag fee. This guide walks through each one with current numbers.
Carry-on and personal item rules
United allows most travelers two free items in the cabin:
- Personal item: Maximum 9 × 10 × 17 inches. Must fit under the seat in front of you.
- Carry-on bag: Maximum 9 × 14 × 22 inches, including wheels and handles.
Checked baggage fees
Domestic and short-haul international
- First checked bag: $35 pre-paid online, $40 at the airport
- Second checked bag: $45 pre-paid online, $50 at the airport
- Third bag and beyond: $150 each, accepted only if space allows
Long-haul international
On most long-haul international Economy fares, the first checked bag is free. A second bag usually costs about $100. Basic Economy on long-haul routes typically charges $75–$80 for the first bag.
Overweight and oversize surcharges
- 51–70 lb: +$100 to $200
- 71–100 lb: +$200 or more
- Oversize (63–115 linear in): +$200
- Over 100 lb: Refused. Must be shipped as cargo.
A 60-lb bag flying coast-to-coast on United Economy costs $35 plus $100 overweight = $135 each way. That's where shipping starts to make obvious sense.
Four legitimate ways to skip the bag fee
1. Get a United co-branded credit card
- United Explorer & United Business: First checked bag free
- United Quest & United Club Infinite: First and second checked bags free
2. Earn MileagePlus Premier status
- Premier Silver: 1 free bag, up to 70 lb
- Premier Gold: 2 free bags, up to 70 lb each
- Premier Platinum & 1K: 3 free bags, up to 70 lb each
3. Fly a premium cabin
United First, United Business, and Polaris Business all include two free checked bags up to 70 lb each.
4. Pre-pay online
Save $5 per bag each way compared to paying at the counter.
Frequently asked questions
What counts as a personal item on United?
A purse, backpack, or laptop bag no larger than 9 × 10 × 17 inches that fits under the seat.
Are strollers and car seats free to check?
Yes — United allows one stroller and one car seat per child for free.
How much is a third checked bag on United?
$150 each on domestic flights, accepted only if space allows.
Does United have a baggage subscription?
Yes — annual subscription starting around $349 lets the subscriber and up to eight companions on the same reservation check bags for free.