Travel Gear
Luggage marketing and airline rules measure differently, and the gap is where gate-check fees live. Airlines measure your bag's total exterior — and most say so explicitly, wheels and handles included. Here are the published limits at six major US airlines, from their official baggage pages as of 2026-07-18.
Five of the six converge on the same number: 22 x 14 x 9 inches. American states the limit includes "the handles and wheels." Delta says the measurements "include any handles or wheels" and adds a 45-linear-inch cap (length + width + height). United tells you to "include the handle and wheels" when measuring. Alaska publishes the same 22 x 14 x 9 with wheels and handles included, plus the 45-linear-inch total. JetBlue writes it the same way: "including wheels and handles." The outlier is Southwest, which publishes a more generous 24 x 16 x 10 inches.
Personal items — the bag that goes under the seat — vary more. American allows up to 18 x 14 x 8 inches. United publishes 17 x 10 x 9 inches, and JetBlue 17 x 13 x 8. Delta, Southwest, and Alaska describe a personal item (purse, briefcase, laptop bag) without publishing exact dimensions on their main baggage pages.
What about weight? For US domestic economy, none of these six airlines publishes a carry-on weight limit on the pages we reviewed — JetBlue is the only one that says so explicitly, noting it "does not currently have a weight restriction for carry-on bags." The practical constraints they do publish: you must be able to lift the bag into the overhead bin yourself (Alaska says this directly), and it must actually fit in the sizer.
Three practical consequences follow. First, measure your suitcase the airline's way: manufacturers sometimes publish a flattering "case" dimension separately from the true exterior with wheels — a bag sold as 21 inches can stand 23 inches tall at the airport. Second, expandable bags obey the rule only zipped down: expansion depths of 10 to 11 inches exceed every 9-inch depth limit above, so treat expansion as packing room for the trip home. Third, basic-economy fares can change the math entirely — United's page states basic economy includes only a personal item on most routes, with a full carry-on reserved for select international itineraries.
A final honesty note: these are the airlines' published limits, which change; sizers, aircraft type, and gate agents decide the outcome on the day. Check your airline's current baggage page before you fly, and when in doubt, measure the bag yourself — wheels, handles, and all.