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. The in-cabin fee is $100 per one way. 8 of the 15 carriers we track clear that published limit.

Last verified 2026-08-14 · 8 of 15 carriers we track fit the 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 17 airlines we track (shared with Delta, American, United, Frontier, Allegiant): Breeze and Avelo allow more, while Air Canada allows only 8".

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

Citing this policy data? Go ahead — sourced from the official airline page, last verified 2026-08-14. Copy a ready-made reference:

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 →

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Carrier	Size	Fit	Buy
Sherpa Original Deluxe (Small)	15 × 10 × 8.5 in	Fits 2" spare	See on Amazon →
Mr. Peanut's Gold Series Mini (Low-Profile)	16 × 10.5 × 9.8 in	Fits 1" spare	See on Amazon →
Petmate Soft-Sided Kennel Cab (Small)	17 × 10 × 10 in	Fits 0" spare	See on Amazon →
Sherpa Original Deluxe (Medium)	17 × 11 × 10.5 in	Fits 0" spare	See on Amazon →
Diggs Passenger	17 × 12 × 10.5 in	Fits 0" spare	See on Amazon →
Sleepypod Atom	17 × 8.5 × 10.5 in	Fits 0" spare	See on Amazon →
Petsfit Expandable Soft-Sided	17 × 11 × 11 in	Fits 0" spare	See on Amazon →
Bergan Comfort Carrier (Small)	16 × 8 × 11 in	Fits 0" spare	See on Amazon →
Sleepypod Air	22 × 10.5 × 10.5 in	Fits collapsed	See on Amazon →
Away The Pet Carrier	18.7 × 10.8 × 10.75 in	Too big	See on Amazon →
Frisco Premium Airline-Compliant Carrier	18 × 11 × 11 in	Too big	See on Amazon →
Sherpa Original Deluxe (Large)	19 × 11.75 × 11.5 in	Too big	See on Amazon →
Mr. Peanut's Gold Series Standard (Expandable)	18.5 × 11.75 × 11.5 in	Too big	See on Amazon →
SturdiBag Pro (Large, Flexible Height)	18 × 11.5 × 11.5 in	Too big	See on Amazon →
ibiyaya JetPaw Expandable Backpack	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: Delta · JetBlue · American · United · Southwest · Alaska · 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