Carry-on is included free on every major US airline in standard economy. Checked bags cost $35–$45 on legacy carriers, but a co-branded airline credit card usually waives that fee.
Airline baggage rules in 2026 are more fragmented than ever — basic economy fares, "carry-on bag included" promos, and bag-fee waivers tied to airline credit cards. Here's what to know.
Standard US Airline Baggage Rules (2026)
- Personal item: free on every US carrier (under-seat size: typically 18×14×8 in.).
- Carry-on bag: free on most carriers in standard economy and above; max 22×14×9 in. on most US airlines. Not free on basic economy on most legacy carriers, or on Spirit/Frontier at any fare.
- First checked bag: typically $35–$45 on US legacy carriers; free on Southwest (2 free) and JetBlue Mosaic.
- Second checked bag: typically $45–$55.
- Overweight (51–70 lb): roughly $100–$150 surcharge per bag.
Free Bag Tricks
- Co-branded credit cards (e.g., AAdvantage Platinum, Delta SkyMiles Gold, United Explorer) usually waive first-bag fees for the cardholder and companions on the same itinerary.
- Elite status (even entry-level) on most US airlines waives first-bag fees and often more.
- Active-duty US military fly with extra free bags on most US carriers.
If Your Bag Doesn't Arrive
- File a delayed-bag report at the airline desk in the arrivals hall before you leave the airport.
- Keep all receipts for essentials you need to buy while waiting — under US DOT rules, airlines must reimburse reasonable expenses for delayed bags.
- If a bag is officially declared lost (typically after 5–14 days), file a written claim for compensation up to the airline's published limit (around $3,800 for US domestic, capped per the Montreal Convention internationally).
Avoid Checked-Bag Risk
Always carry on: medications, passport, electronics, valuables, and one full change of clothes. If a flight is downgauged or your gate-checked bag gets lost, you'll be glad you did.
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