The in-cabin pet travel checklist
To fly with a pet in the cabin you need four things: an airline that allows it (13 of the 58 we track do not), a carrier inside that airline's published under-seat limit, a booked pet reservation — 23 of the 42 airlines that publish booking rules still involve a phone call — and the fee, which runs $35–$150 each way.
Before you book
- Check the airline takes pets in the cabin at all. 13 of the 58 we track do not, including Air New Zealand, ANA (All Nippon Airways), British Airways, Cathay Pacific. See every policy →
- Book the pet, not just the seat. 42 airlines publish a booking rule and 23 of those route it through a call centre or ticket office rather than the website. Cabin pet slots are capped per flight.
- Check the species wording. 16 of these airlines say small dogs rather than dogs — the distinction is theirs, not ours, and it is where a booking gets refused at the gate.
- Budget the fee each way. $35 (Hawaiian Airlines) to $150 (United Airlines). Fees compared →
The carrier — the one item you can get wrong
Height is the dimension a seat will not negotiate on. Across the 42 airlines that publish one the limit runs 7" to 13", median 9.1" — and the strictest is EL AL Israel Airlines at 7". A bag that clears one airline routinely fails another.
- 19 of these airlines require a soft-sided carrier specifically.
- 12 state in their own policy that real under-seat space varies by aircraft. Why the published number is optimistic →
- Measure the pet before the bag: the two measurements and the stand-and-turn rule →
Widest fit across the airlines we track is the Sherpa Original Deluxe (Small) at 28 of 58 outright (up to ~8 lb) — but "widest fit" is not "right for your pet". Start from your airline instead: the fit matcher · every carrier by size.
What to pack alongside it
Five things that travel next to the carrier rather than inside it — none of them affect whether the bag clears the size limit.
Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.
1. A collapsible water bowl
Security makes you empty any bowl anyway, and a flat one packs beside the carrier instead of inside it — the carrier's own volume is what the size limit measures.
Search Amazon →2. Absorbent liner pads
A soaked carrier floor is the one accident you cannot fix at 35,000 ft. Pads also let you swap the liner at a layover without unpacking the bag.
Search Amazon →3. An ID tag with your phone number
Worth it because 12 of the 45 airlines here warn that under-seat space varies by aircraft — the situation where a carrier comes out at the gate is exactly when a pet can slip a collar.
Search Amazon →4. A luggage strap
In-cabin pets count as your personal item on most of these airlines, so the carrier still has to travel with a bag. A strap over the suitcase handle keeps both hands free at security.
Search Amazon →5. Waste bags and wipes
Nothing airline-specific here — it is simply the item people report forgetting most, and no airside shop sells it.
Search Amazon →At the airport
- Your pet comes out of the carrier at security and is carried through the metal detector; the empty carrier goes through the X-ray. Practise this at home first.
- The carrier lives under the seat in front of you for the whole flight — not on your lap, not in the overhead bin.
- Bulkhead rows have no under-seat storage. If you are auto-assigned one, change it.
Next: your airline's exact policy · carriers ranked by fit · in-cabin vs cargo.
Common questions
What do I need to fly with a pet in the cabin?
An airline that allows it (13 of the 58 we track do not), a carrier within that airline's published under-seat limit, a booked pet reservation — 23 of 42 airlines still route this through a phone call — and the fee, $35 to $150 each way.
Does the pet-weight limit include the carrier?
Often yes. 31 of the airlines we track publish a pet-weight limit and 20 of those weigh the carrier with the pet. Check your pet's weight with the bag before buying, not after.
What size carrier do I need?
Height decides it. Across the 42 airlines publishing a limit it runs 7" to 13" with a median of 9.1"; the strictest is EL AL Israel Airlines at 7". 19 airlines also require a soft-sided carrier. Match your own airline rather than buying to the median.
Does my pet come out of the carrier at security?
Yes. You carry the pet through the metal detector and the empty carrier goes through the X-ray. It is worth practising the take-out-and-hold at home, because it happens in a queue.