Photo by Siora Photography on UnsplashJetBlue publishes its baggage sizes to the nearest hundredth of a centimetre: carry-on 22" L (55.88 cm) x 14" W (35.56 cm) x 9" H (22.86 cm), personal item 17" L (43.2 cm) x 13" W (33 cm) x 8" H (20.32 cm). That precision is not a formality. It is the only conversion in this group that is arithmetically exact, and it quietly settles an argument that the other airlines' own pages create.
The numbers, exactly as JetBlue prints them
| What JetBlue publishes | Official figure |
|---|---|
| Carry-on (inches) | 22 × 14 × 9 in |
| Carry-on (centimetres) | 55.88 × 35.56 × 22.86 cm |
| Personal item (inches) | 17 × 13 × 8 in |
| Personal item (centimetres) | 43.2 × 33 × 20.32 cm |
| Carry-on weight limit | not published |
| Wheels and handles counted? | Yes |
| Checked bag: max weight | 50 lb / 22.68 kg |
| Checked bag: max total size | 62 in / 157.48 cm |
Where these numbers come from: JetBlue carry-on page, JetBlue checked bag page. Read and recorded on 2026-08-31. Every figure on this page is copied from those pages — nothing here is estimated. Airlines change baggage rules without notice, so check the official page before you fly.
The only airline here whose centimetres are exact
Look at how the other airlines convert the same 22 x 14 x 9 inch box. American prints 56 x 36 x 23 cm. United and Delta print 56 x 35 x 23 cm. Those are the same inches producing different centimetres, because each airline rounded differently — 14 inches is 35.56 cm, and one rounded up while the others rounded down. JetBlue simply prints 55.88, 35.56 and 22.86, which is what the inches actually are.
That is not a trivia point if you are packing to centimetres, which anyone shopping outside the United States is. A case advertised at 36 cm wide is legal by American's published figure and over United's and Delta's by half a centimetre. Under JetBlue's exact numbers you can settle it without guessing: 36 cm is over 35.56, so a genuinely 36 cm bag is oversized on JetBlue too, whatever American's rounded table says.
JetBlue's personal item, at 17 x 13 x 8 inches (43.2 x 33 x 20.32 cm), is the third largest here, behind Frontier's and American's 18 x 14 x 8. It is roughly 29 litres, which is a real weekend bag rather than a handbag allowance, and JetBlue includes both the carry-on and the personal item with all fares — with the caveat, written on its own page, that the carry-on is "space permitting."
That caveat deserves a sentence of its own. JetBlue words the cabin allowance as a carry-on bag "(space permitting) that fits in the overhead bin," and the personal item as something "to be placed all the way under the seat in front of you." Those are two different promises. The under-seat space is yours; the bin is not guaranteed on a full aircraft. If something has to travel in the hold at the last minute, it should not be your laptop, your medication or your passport.
On the checked side JetBlue applies the usual 62 inches and 50 pounds, and again gives the exact conversions: 157.48 cm and 22.68 kg. Mint and Mint Flex fares include a first checked bag at up to 70 lb / 32 kg. Fees on the standard fares change with peak travel dates, and JetBlue's page notes you save up to $10 per bag by adding it at least 24 hours before departure rather than at the airport.
Measuring your own bag against these numbers
The bag most retailers label "the standard carry-on" is 22 x 14 x 9 inches. Converted exactly, that is 55.88 x 35.56 x 22.86 cm, and the three sides add to 114.3 cm. Held against JetBlue's published limits, here is where it stands.
It fits. Every side of the standard bag is inside JetBlue's published maximum of 55.88 × 35.56 × 22.86 cm. That gives you no meaningful margin in the directions where it matters, but the margin exists only for an unpacked bag: soft sides bulge, and hard shells bow at the lid when overfilled.
The reverse question matters just as much if you already own luggage. A bag bought to fit Southwest Airlines, Frontier Airlines, Air Canada, American Airlines, United Airlines, Delta Air Lines, Korean Air does not — those boxes are larger than JetBlue allows in at least one direction.
Whichever airline you are flying, measure the same way the airline does: bag packed, tape across the widest bulge rather than the frame, wheels and handle included, expansion zip closed. Every airline on this page that says anything about wheels says they count.
What JetBlue does not publish
These were checked against JetBlue's own baggage pages on 2026-08-31. The following are simply not stated there, so treat any number you find elsewhere for them as somebody's inference rather than a rule:
- A carry-on weight limit
- A carry-on weight limit in pounds
- A combined length + width + height cap
- A personal item weight limit
- How many checked bags are included
How JetBlue compares with the other seven
JetBlue's cabin box matches American, United and Delta; its personal item is larger than all three except American's. JetBlue ranks fifth of the eight by published cabin volume at 45.4 litres, between Southwest Airlines's 62.9 at the top and Korean Air's 44.0 at the bottom. Volume is the published box multiplied out, which is the fairest way to compare boxes of different shapes.
| Airline | Carry-on (in) | Carry-on (cm) | Volume (L) | Weight cap | Personal item (in) |
|---|---|---|---|---|---|
| American Airlines | 22 × 14 × 9 in | 56 × 36 × 23 cm | 46.4 | — | 18 × 14 × 8 in |
| JetBlue | 22 × 14 × 9 in | 55.88 × 35.56 × 22.86 cm | 45.4 | — | 17 × 13 × 8 in |
| United Airlines | 22 × 14 × 9 in | 56 × 35 × 23 cm | 45.1 | — | 17 × 10 × 9 in |
The full eight-airline table, including checked bag limits, is on the comparison page. Alaska Airlines is deliberately absent from it: its baggage pages would not open to us, and we would rather leave a gap than print a figure we could not read on an official page.
Buying to JetBlue numbers
A standard 22 x 14 x 9 case is exactly right for JetBlue and transfers cleanly to American, United and Delta. If you are shopping in centimetres, use JetBlue's own figures as the arbiter — 55.88 x 35.56 x 22.86 — because they are the only published conversion here that is exact, and a bag that clears them clears the rounded tables at the other US carriers too.
The personal item is worth using. At 17 x 13 x 8 it is large enough to carry a change of clothes and a laptop, which is useful given JetBlue's own "space permitting" caveat on the cabin bag.
The other seven airlines
- Southwest Airlines carry-on and checked bag sizes
- Frontier Airlines carry-on and checked bag sizes
- Air Canada carry-on and checked bag sizes
- American Airlines carry-on and checked bag sizes
- United Airlines carry-on and checked bag sizes
- Delta Air Lines carry-on and checked bag sizes
- Korean Air carry-on and checked bag sizes
Related pages on TripPack
- All eight airlines in one table — carry-on, personal item and checked limits side by side.
- Carry-on packing list — what to actually put in the bag once you know it fits.
- How to measure a carry-on bag — where to hold the tape.
- Baggage weight limits explained.