JetBlue's current carry-on page lists a 22 × 14 × 9 inch overhead bag and a separate 17 × 13 × 8 inch underseat personal item. The dimensions include wheels and handles. The page says one of each is allowed on JetBlue fares, but a partner-operated flight and the actual cabin space still require attention.
Compare the two JetBlue boxes
| Item | Published outside dimensions | Storage |
|---|---|---|
| Carry-on | 22 × 14 × 9 in | Overhead bin, or underseat if it truly fits |
| Personal item | 17 × 13 × 8 in | Under the seat |
JetBlue does not state a routine carry-on weight limit on that page, but says a traveler must be able to lift the item into the overhead bin when assistance is unavailable. Do not translate that into an unlimited or guaranteed cabin acceptance rule. Size, safe stowage and other item restrictions still apply.
Example: a bag that changes category
A 17 × 13 × 8 inch backpack is at the published personal-item box. If an outer pocket takes it to 18 × 13 × 8 inches, it exceeds that box even though it remains far smaller than the carry-on box. It may need to count as your one carry-on, subject to the ticket and aircraft. The personal item checker and carry-on checker answer those two different measurements.
A switched flight or connection
JetBlue's help page discusses how bag rules and charges can change when a trip is moved to another airline. A cabin item accepted on a JetBlue-operated segment is not proof that an American or other partner flight has the same size or storage allowance. Review the confirmation for each operating leg. If a carry-on is checked at the gate, remove spare batteries and keep medication and documents with you.
For a checked piece, use JetBlue's own bag calculator or JetBlue baggage fee profile; the carry-on size is not a checked-bag price.
Airline sources
Sources last checked 2026-10-31. Match the fare and flight in your booking before you pay or pack.