Yes: Frontier names small duffel bags among its carry-on bags, and Samsonite UK counts duffle bags as overhead cabin luggage. Either way the bag has to be within the airline’s carry-on size, measured packed.
Bag type
Your bag against each airline
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Makers’ duffels against the limits
Duffels against 12 airlines’ limits, as of October 2026
Duffel
Outside size
Capacity
Carry-on limits it fits
Personal item limits it fits
Monos Metro Weekender
14.5 x 18.9 x 10.1 in (36.83 x 48 x 25.65 cm)
35.5 L
1 of 12
0 of 8
Monos Metro Duffel
11.2 x 16.3 x 7.2 in (28.44 x 41.4 x 18.28 cm)
19.6 L
12 of 12
7 of 8
Travelpro Platinum Elite Soft Duffel
12.5 x 19 x 9 in (about 31.8 x 48.3 x 22.9 cm)
49 L
12 of 12
0 of 8
Samsonite Prodiver Duffle with wheels 55cm
55 x 35 x 23 cm (about 21.7 x 13.8 x 9.1 in)
Not given
7 of 12
0 of 8
Personal item limits counted among the 8 airlines that give a size. Sizes and capacities are each maker’s own.
Monos’ Metro Weekender is 10.1 in deep, and Monos says its capacity is like its Carry-On’s. Travelpro’s Platinum Elite Soft Duffel is 12.5 x 19 x 9 in.
Measure it packed
A soft duffel is only as small as it’s packed. Fill it as you’ll fly and measure the fullest point. Frontier counts handles, wheels and straps in its sizes, and Allegiant counts pockets.
Common questions
Can a duffel be a personal item?
Yes, when it's within the personal item size. Monos' Metro Duffel, 11.2 x 16.3 x 7.2 in, fits 7 of the 8 personal item limits here, American, JetBlue, Frontier, Allegiant, Sun Country, Breeze and Avelo.
What size duffel is a carry-on?
One within your airline's carry-on limit, 22 x 14 x 9 in on American, Delta, United, Alaska, JetBlue, Hawaiian, Breeze and Avelo. Travelpro's Platinum Elite Soft Duffel, 12.5 x 19 x 9 in, is within it.
Airline limits come from each airline’s own baggage pages, read in October 2026. Bag sizes come from each maker’s own product pages, read in October 2026. Checked against published data from Frontier Airlines, Sun Country Airlines, Avelo Airlines, Monos and American Airlines (plus 10 more).
See all 19 sources
American Airlines, Carry-on bags (aa.com)
Delta Air Lines, Carry-On Baggage (delta.com)
United Airlines, Carry-on bags (united.com)
Southwest Airlines, Carryon and Personal Item Policy (support.southwest.com)
General guidance from airline, TSA and FAA rules, checked on the date shown. Rules change, and the airline and security officers decide on the day: check your airline before you fly.