How to avoid checked bag fees on every airline

Checked bag fees have quietly become one of the most avoidable travel costs, yet most passengers pay them. A single round trip on Delta or United now runs $80–$100 in first-bag fees alone, and Southwest's legendary free-bag era ended in May 2025.

What checked bags actually cost in 2025–2026

Delta and United charge $45 prepaid or $50 at the airport counter for the first checked bag each way. The second bag steps up to $55. On a round trip for two people each checking one bag, that is $180 before you reach the gate.

Southwest ended its two-free-bags policy on May 28, 2025. Today, only Choice Extra fare holders and A-List Preferred members still receive two free bags. Standard passengers pay.

Ultra-low-cost carriers operate under a different model entirely. Frontier's base fares include only a personal item. A carry-on that goes in the overhead bin is a paid add-on: Frontier charges $35–$79 depending on when you pay. (Spirit, long the other big ultra-low-cost carrier, stopped flying on May 2, 2026.) The lesson here is simple: on a budget carrier, the base fare is not the total fare unless you pack to the personal item limit.

Know the two free dimensions

Every US airline includes one personal item at no charge on every fare. The typical personal item limit is 18 x 14 x 8 inches, small enough to fit under the seat in front of you. Backpacks, laptop bags, compact duffels, and wheeled underseaters like the Travelpro Maxlite 5 Rolling Underseat all qualify. For more options sized to the personal item slot, see our roundup of the best underseat luggage.

The standard overhead carry-on limit across most major US carriers is 22 x 14 x 9 inches (total exterior, including wheels and handles). At Delta, United, and American, that carry-on is free. At Frontier, it is not.

The number that trips people up: wheels and handles count. A bag whose wheels protrude 2–4 cm beyond the shell can push you over the limit at a gate sizer. Measure with wheels extended, handles raised. Then leave a small margin.

Pack to the personal item and skip the overhead bin

The personal item slot is the fee-proof foundation. A 40L backpack packed well fits the 18 x 14 x 8 inch limit on most airlines and travels as your single free item everywhere.

Co-branded airline cards: the highest-ROI approach

If you check a bag more than once or twice a year, a co-branded airline card pays for itself immediately.

Delta Amex Gold cardholders receive a free first checked bag on Delta flights for themselves and up to eight companions on the same reservation. Critically, you do not need to pay for the flight with the card to unlock the benefit. On a family trip of four, one round trip saves $320 in first-bag fees. The card's annual fee is around $150.

The United Explorer Card offers the same free-first-bag structure, but United requires payment with the card to trigger the benefit. American's co-branded cards (Citi and Barclays) work similarly to Delta: no pay-with-card requirement.

One round trip's first-bag savings ($80–$100) typically covers or exceeds the annual fee on a co-branded airline card. For group travel, the math gets more decisive: the Delta Amex Gold extends the benefit to up to eight companions on the same reservation.

Entry-level elite status (Delta Silver Medallion, United Premier Silver) also waives the first checked bag fee and covers companions on the same reservation. If you are close to a status threshold, the bag savings alone can justify a mileage run.

The gate-check gamble

Airlines now proactively solicit gate checks before the overhead bins are actually full, targeting passengers in later boarding groups. The ask sounds voluntary. It rarely is by group 4 or 5.

If your bag passes the overhead sizer but you board late, the bins may be full and your bag goes below. That is usually free. The expensive scenario is a bag that fails the gate sizer because wheels or handles push it over the stated limit. American, for example, can charge up to $100 at the gate for an oversized carry-on.

The defense is straightforward: board early. Priority boarding comes with elite status, co-branded credit cards on most airlines, or a fare upgrade. A compliant bag that boards in group 1 or 2 almost never gets gate-checked.

If you need to check a bag on a trip where you do not have a card benefit or status, prepay online before you arrive. Airport counter and gate fees are consistently $5–$20 higher than prepaid rates across all major carriers.

Quick comparison by carrier type

For specific bag picks that hit the personal item and carry-on limits, see our guide to the best carry-on luggage. Browse all travel gear guides or read how we research and rate gear at Kit Authority.