JSX in-cabin pet policy — and the carriers that fit
JSX allows small pets in the cabin in a carrier up to 17 × 13 × 11 in, stowed under the seat in front of you. Already own a carrier? Enter its measurements below to check it against this limit. The in-cabin fee is $100 per one way. 8 of the 15 carriers we track clear that published limit.
The Sherpa Original Deluxe (Small) leaves the most room — 2" on its tightest dimension, while the Petmate Soft-Sided Kennel Cab (Small) only just squeaks in with nothing to spare. JSX's 11" height ceiling sits mid-pack among the 58 airlines we track (shared with Allegiant, American, Delta, Frontier, United): Avelo and Breeze allow more, while EL AL Israel allows only 7".
Will your carrier fit JSX?
Measure the outside of your carrier (bulges included) and enter it below. The check uses JSX’s published 17 × 13 × 11 in limit — height is checked strictly, the footprint may rotate.
JSX pet rules
| Recommended max carrier (soft) | 17 × 13 × 11 in |
| Soft-sided required? | Soft recommended; hard allowed within its limit |
| In-cabin fee | $100 per one way · compare all airlines → |
| Species allowed | cats, small dogs |
| Weight | under 30 lb (pet only; a separate 80 lb leashed-floor-space program applies to larger dogs, not tracked here) |
| Pets | 1 pet per carrier · 1 carrier per passenger · up to 5 pets in the cabin per flight |
| Booking | Indicate your pet when booking online, or call Customer Support at (800) 435-9579 before flying — a completed JSX Pet Acceptance Form is required |
Source: official JSX pet policy · verified 2026-08-14
Carriers that fit JSX
Matched to JSX's published 17 × 13 × 11 in limit (height checked strictly; footprint may rotate). See the full JSX carrier shortlist →
Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.
| Carrier | Size | Fit | Buy |
|---|---|---|---|
| 15 × 10 × 8.5 in | Fits 2" spare | See on Amazon → | |
| 16 × 10.5 × 9.8 in | Fits 1" spare | See on Amazon → | |
| 17 × 10 × 10 in | Fits 0" spare | See on Amazon → | |
| 17 × 11 × 10.5 in | Fits 0" spare | See on Amazon → | |
| 17 × 12 × 10.5 in | Fits 0" spare | See on Amazon → | |
| 17 × 8.5 × 10.5 in | Fits 0" spare | See on Amazon → | |
| 17 × 11 × 11 in | Fits 0" spare | See on Amazon → | |
| 16 × 8 × 11 in | Fits 0" spare | See on Amazon → | |
| 22 × 10.5 × 10.5 in | Fits collapsed | See on Amazon → | |
| 18.7 × 10.8 × 10.75 in | Too big | See on Amazon → | |
| 18 × 11 × 11 in | Too big | See on Amazon → | |
| 19 × 11.75 × 11.5 in | Too big | See on Amazon → | |
| 18.5 × 11.75 × 11.5 in | Too big | See on Amazon → | |
| 18 × 11.5 × 11.5 in | Too big | See on Amazon → | |
| 18 × 12 × 12 in | Too big | See on Amazon → |
How to confirm your actual under-seat space
JSX's number is a fleet-wide recommendation, not a promise for your exact seat. Before you buy or fly:
- Check which aircraft operates your flight (in your booking or on a seat-map site).
- Avoid bulkhead and some window seats — they have less (or no) under-seat storage.
- Call JSX to confirm under-seat dimensions for that aircraft, or
- Choose a collapsible / flexible-height carrier that adapts to a tighter space.
More airlines: Air Canada · Alaska Airlines · Allegiant Air · American Airlines · Breeze Airways · Delta Air Lines · Frontier Airlines · Southwest Airlines · United Airlines · all →
Common questions
What size pet carrier does JSX allow in the cabin?
JSX's recommended maximum in-cabin carrier is 17 × 13 × 11 in. It must fit fully under the seat in front of you. Source: the JSX pet policy.
How much does JSX charge for an in-cabin pet?
$100 per one way. Always confirm the current fee on the official JSX pet page before you fly.
Which pet carriers fit JSX?
8 of the 15 carriers we track clear JSX's published 17 × 13 × 11 in. The roomiest is the Sherpa Original Deluxe (Small), with 2" to spare on its tightest dimension. Full shortlist: /fits/jsx/.
Does JSX require a soft-sided pet carrier?
JSX recommends soft-sided but allows a hard-sided kennel within its published limit. Height is what rules carriers out: JSX publishes 11", against 13" at the most generous airline we track.
How many pets can I bring in the cabin on JSX?
1 pet per carrier · 1 carrier per passenger · up to 5 pets in the cabin per flight. Species accepted: cats, small dogs. Weight limit: under 30 lb (pet only; a separate 80 lb leashed-floor-space program applies to larger dogs, not tracked here). Indicate your pet when booking online, or call Customer Support at (800) 435-9579 before flying — a completed JSX Pet Acceptance Form is required