Quick answer: JetBlue carries small dogs and cats in the cabin only, in a carrier that fits under the seat in front of you, with a combined weight limit of about 20 pounds for the animal and carrier together. There is no cargo and no checked-baggage option for pets. One feature sets it apart from most US carriers: a single traveller may bring two pets, each in its own carrier, where most airlines allow one. A few international destinations do not accept pets at all. Call a travel expert at Fond Travels on +1 (323) 800 6001 and we will check your animal and your route.
Details reflect what was published at the time of writing. Carrier dimensions, charges and per-flight limits change, so confirm them for your booking.
The limits
- Species: small dogs and cats only. Large dogs are not accepted.
- Weight: around 20 pounds for the animal and carrier combined.
- Carrier size: around 17 inches long by 12.5 wide by 8.5 high, with soft-sided carriers measured compressed to that height.
- The animal stays in the zipped carrier the entire time at the airport and on the aircraft.
- The carrier counts as your personal item and goes under the seat in front of you.
Weigh the animal inside the carrier on a bathroom scale at home. Twenty pounds sounds generous until a sturdy carrier takes four or five of it.
Two pets per traveller, which is unusual
Most US airlines allow one animal per passenger. Here a single traveller may bring two, each in its own carrier — which solves a problem that otherwise requires a second person to come along.
A few practicalities follow:
- Two carriers means two under-seat spaces, so you need the seat in front of you and an arrangement for the second.
- Both are charged, per animal each way.
- Both count against the flight's pet capacity, commonly reported at around six animals, so booking two on a busy flight needs doing early.
- Check the arrangement when you book rather than arriving with two carriers and an assumption — sources differ on this point, and the airline's own answer is the one that counts.
Where pets cannot go
- Cargo and checked baggage: not offered, for any animal, on any route. If your dog does not fit under a seat, this is not the airline.
- Certain international destinations do not accept pets — several Caribbean islands are commonly listed, reflecting their own import rules rather than the airline's preference.
- Unaccompanied minors cannot travel with a pet, which catches families sending a teenager to visit relatives with the family dog.
That last one is worth flagging because it combines two separate policies in a way nobody anticipates: a young person travelling alone, and an animal, cannot be the same booking.



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