Allegiant Air allows a personal item of 18 × 14 × 8 inches and a carry-on of 22 × 16 × 10 inches. Both measurements include wheels and handles, which is where most people get caught out.
Measure the outside, wheels and handles included — that’s what they measure at the gate.
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Enormous margin against every limit here, and it looks like a normal bag rather than travel gear. Ten litres is a daybag though, not a travel bag.
The anti-theft option that actually fits — slash-resistant panels, locking zips, RFID pocket, and a 13-inch laptop sleeve, all inside United’s width.
Pacsafe’s own site is JavaScript-gated, so this comes from a retailer spec rather than the brand. The 0.2 inches of width margin rests on that number.
Five ounces. It stuffs into its own pocket, so it costs you almost nothing to carry as insurance — and it clears every personal item limit on this page.
Unstructured, so 7.48 inches is the empty depth. Pack it full and it rounds out.
The most margin of anything here — comfortably inside United’s brutal 17 × 10 × 9 and inside the budget carriers’ 18 × 14 × 8 too. Structured neoprene that holds its shape instead of sagging.
Buy the MEDIUM. The Large is 16.5 × 11 × 9 and fails United on width.
A tote-shaped answer to the Narwey. Under a pound, folds flat, and doubles as a packable second bag stuffed inside a bigger case.
The one wheeled bag here that genuinely passes an 18×14×8 sizer — because the wheels pop off in a single click. Wheels on it’s 19.5 inches and fails; wheels off it’s 17.5 and passes.
The fit verdict shown assumes the wheels are removed. With them attached it measures 19.5 × 13.5 × 7.8.
See all 15 bags that fit Allegiant’s personal item limit →
Narrower questions: Allegiant personal item size · Allegiant carry-on size · best Allegiant carry-on bags. Flying with camera gear? 28 camera bags fit Allegiant — see the camera bag guide.
Allegiant Air allows a personal item up to 18 × 14 × 8 inches, and that measurement includes wheels, handles and straps. It has to fit fully under the seat in front of you. 15 of the bags we track fit it.
Allegiant Air allows a carry-on up to 22 × 16 × 10 inches including wheels and handles. No carry-on weight limit is published, but you must be able to lift the bag into the overhead bin yourself. 13 of the bags we track fit it.
Yes. Costs extra on every fare. Pricing runs $10–75 depending on route and when you buy. The personal item is always free.
Yes. Allegiant Air measures the outside of the bag, so wheels, handles, straps and external pockets all count. This is why a suitcase sold as a "20-inch carry-on" is often 22 inches overall and can still fail a sizer.
You will be asked to pay at the gate, which is the most expensive point to buy. Buying a carry-on at booking is always cheaper.
Manufacturers publish dimensions inconsistently, and a “20-inch” spinner is almost never 20 inches once you count the wheels. Where a brand states dimensions including wheels and handles, that’s the number we use. Where it only publishes the case, we say so on the card. Airlines measure the outside of your bag — wheels, handles, straps and all. Anything marked borderline is down to the gate agent, and remember that a soft bag squashes into a sizer while a hard shell won’t.
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Limits verified August 2026 against each carrier’s published policy. Airlines change these without notice — always confirm before you fly. Spirit Airlines ceased operations on 2 May 2026 and is no longer listed.
Airline Bag Size Checker v1.0.15 · last updated 2026-08-12