United Airlines allows passengers to bring one carry-on bag and one personal item onboard without extra fees, except for Basic Economy fares. The personal item must not exceed 9 x 10 x 17 inches (22 x 25 x 43 cm) and needs to fit under the seat in front of you. Acceptable personal items include bags like backpacks, purses, or laptop cases.
Carry-on bags are limited to a maximum size of 22 x 14 x 9 inches (56 x 35 x 22 cm). These measurements include wheels and handles, and the bag must fit in the overhead compartments.
Families traveling with infants can bring one stroller or car seat without additional fees. Staying within these guidelines prevents unexpected charges and ensures a smoother travel experience.
Does United allow a travel backpack and carry-on?
Last Updated: September 2026
Need a bag that fits under every airline seat?
Arca's personal item bags are sized at 18×14×8" — tested and approved for American Airlines, Southwest, United, Frontier, Delta, and Spirit. Every ticket type, no gate-check surprises.
Shop Airline-Approved Personal Item Bags →United Airlines permits you to bring both a carry-on bag and a personal item on most flights. Personal items, including travel backpacks, sling bags, and foldable bags, must not exceed 9 x 10 x 17 inches and fit under the seat in front of you.
If you're flying Basic Economy, you're limited to one personal item unless traveling on certain international routes where carry-on bags are allowed.
What if My Cabin Bag Is 2cm Bigger?
A cabin bag 2cm larger than United's carry-on limit might still be allowed onboard. Gate agents make the final decision. If the bag slightly exceeds the 22 x 14 x 9-inch requirement but remains inconspicuous, it's often overlooked. Choose collapsible bags that conform to the space available during inspections.
How Much Do I Have To Pay For United Checked Bags?
United checked bag fees depend on your fare class and MileagePlus tier. General members pay $40 for the first bag and $50 for the second on North American routes. Prepaying at least 24 hours before departure saves $5 per bag. MileagePlus Premier members get one to three free checked bags depending on status.
For Basic Economy fares, checked baggage always incurs a fee unless you hold a qualifying United co-branded credit card.
How can I get a free checked bag on United Airlines?
- MileagePlus Premier Membership — Silver gets one free bag; Gold, Platinum, and 1K get two or three.
- United Co-Branded Credit Cards — Explorer Card covers one free bag for you and a companion.
- First or Business Class — two to three free checked bags depending on the route.
- Star Alliance Gold Status — one free bag in Economy on United flights.
- Active Duty Military — up to three free bags on US flights.
- Prepaid Discounts — prepay 24+ hours before departure to save $5 per bag on the first two.
What Extra Items Can You Bring On Board?
- Outerwear and Accessories: Jackets, umbrellas, and blankets — no restrictions.
- Food and Beverages: Snacks or drinks purchased after security are permitted.
- Assistive Devices: Canes, wheelchairs, and crutches are allowed.
- Child-Related Items: Diaper bags, breast pumps, and car seats are acceptable.
- Duty-Free Purchases: Items from duty-free shops are permitted onboard.
United Basic Economy Carry-On: What’s Actually Included
Basic Economy is United’s most restrictive fare — and the most common source of surprise fees. Here’s exactly what’s allowed.
What carry-on is allowed on United basic economy?
On United basic economy, you are only entitled to one personal item (max 9 x 10 x 17"). A standard carry-on for the overhead bin is not included. If you arrive at the gate with a carry-on on a basic economy ticket, you’ll pay the checked bag fee — currently $40+ — on the spot.
United basic economy vs. economy: what’s the bag difference?
Standard Economy includes one free personal item and one free carry-on (up to 22 x 14 x 9"). United basic economy only covers the personal item. That difference can cost $40–80 round-trip. The fix: fly basic economy with a compact 18×14×8 personal item bag and skip the fee entirely.
Can I add a carry-on to a United basic economy ticket?
Yes — you can purchase carry-on access as an add-on at check-in, though it’s rarely cheaper than upgrading your fare. If you frequently travel with more than a personal item, standard Economy is usually better value.
Does United basic economy include a personal item on every route?
Yes. One personal item (9 x 10 x 17") is included on all United basic economy flights — domestic and international. The restriction only applies to overhead bin carry-ons.
Avoid Airline Baggage Fees
Understanding United’s baggage policies keeps your trip stress-free. Stick to size limits, double-check dimensions if you’re on Basic Economy, and take advantage of prepayment discounts or membership perks where you can.
Flying United Basic Economy? Pack smart, skip the fee.
Arca’s personal item bags are sized at 18×14×8" — fits under every United seat on every fare type, Basic Economy included. No carry-on fee, no gate-check stress.
Shop United Basic Economy–Approved Bags →Arca Team
The Arca Official Team is a group of avid travelers and gear enthusiasts based between Vancouver, Canada and Buenos Aires, Argentina. Founded by two entrepreneurs who couldn't find affordable, quality travel gear, Arca Official has helped thousands of travelers pack smarter. Every article is researched and written by team members who test the gear themselves.
