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 Mr. Peanut's Gold Series Mini (Low-Profile) only just squeaks in with nothing to spare. JSX's 11" height ceiling sits mid-pack among the 77 airlines we track (shared with Allegiant, American, American Eagle (regional, incl. Republic Airways), Copa, Delta, Frontier, United): Air Europa, Avelo, Breeze and Pegasus 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.
Carriers that clear JSX (17 × 13 × 11 in)
Roomiest margin first. Sized to the airline’s limit, not to your pet — measure your pet first →
| Carrier | Size | Fit | Buy |
|---|---|---|---|
Sherpa Original Deluxe (Small) up to ~8 lb · max pet 13″ long × 7.5″ tall | 15 × 10 × 8.5 in | Fits 2" spare | See on Amazon → |
 Mr. Peanut's Gold Series Mini (Low-Profile) up to ~15 lb | 17 × 11 × 9 in | Exact fit 0" spare | See on Amazon → |
Petmate Soft-Sided Kennel Cab (Medium) up to ~10 lb | 17 × 10 × 10 in | Exact fit 0" spare | See on Amazon → |
Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.
JSX pet rules
| Max carrier size (published) | 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 · what to book, buy and pack → |
| Seating restrictions | Not permitted in the bulkhead, emergency exit rows, or the aisle; the carrier may not be placed on a seat — it must be stowed under the seat in front of you. |
Source: official JSX pet policy · verified 2026-09-05 · how JSX ranks on fee and space →
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.
This table ranks by JSX’s size limit — not by your pet. The weight under each carrier is what that size is rated to hold. A bag can clear the airline and still be the wrong size for the animal, which is the most common reason one goes back — measure your pet first →
| Carrier | Size | Fit | Buy |
|---|---|---|---|
Sherpa Original Deluxe (Small) up to ~8 lb · max pet 13″ long × 7.5″ tall | 15 × 10 × 8.5 in | Fits 2" spare | See on Amazon → |
Mr. Peanut's Gold Series Mini (Low-Profile) up to ~15 lb | 17 × 11 × 9 in | Exact fit 0" spare | See on Amazon → |
Petmate Soft-Sided Kennel Cab (Medium) up to ~10 lb | 17 × 10 × 10 in | Exact fit 0" spare | See on Amazon → |
Sherpa Original Deluxe (Medium) up to ~16 lb · max pet 16″ long × 9.5″ tall | 17 × 11 × 10.5 in | Exact fit 0" spare | See on Amazon → |
Diggs Passenger pet size not published · Diggs discontinued this carrier — link goes to similar carriers | 17 × 12 × 10.5 in | Exact fit 0" spare | Search Amazon → |
Sleepypod Atom up to ~12 lb | 17 × 8.5 × 10.5 in | Exact fit 0" spare | See on Amazon → |
Petsfit (Medium) Expandable Soft-Sided up to ~13 lb | 17 × 11 × 11 in | Exact fit 0" spare | See on Amazon → |
Bergan Comfort Carrier (Small) pet size not published | 16 × 8 × 11 in | Exact fit 0" spare | See on Amazon → |
Sleepypod Air up to ~18 lb | 22 × 10.5 × 10.5 in | Fits collapsed | See on Amazon → |
6 carriers too big for JSX
Mr. Peanut's Gold Series Standard (Expandable) up to ~20 lb | 18 × 11 × 10 in | Too big | View on Amazon |
ibiyaya JetPaw Expandable Backpack up to ~17 lb | 18 × 12 × 10.5 in | Too big | View on Amazon |
Away The Pet Carrier pets up to ~18 lb | 18.7 × 10.8 × 10.75 in | Too big | Compare similar on Amazon → |
Frisco Premium Airline-Compliant Carrier up to ~22 lb | 18 × 11 × 11 in | Too big | Compare similar on Amazon → |
Sherpa Original Deluxe (Large) up to ~22 lb · max pet 18″ long × 10.5″ tall | 19 × 11.75 × 11.5 in | Too big | View on Amazon |
SturdiBag Pro (Large, Flexible Height) pet size not published | 18 × 11.5 × 11.5 in | Too big | View on Amazon |
How to confirm your actual under-seat space
JSX's number is its published maximum, not a guarantee 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 exit rows — bulkheads have no under-seat storage and most airlines ban pets there — and check this airline's seat rules above.
- 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. The heaviest pet any carrier that clears JSX is rated for is 16 lb (some fitting carriers publish no pet rating). 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