In-cabin pet carriers that fit Alaska Horizon (Horizon Air)
The carriers from our list that clear Alaska Horizon's official 17 × 11 × 9.5 in under-seat limit — sorted best-fit first, with the ones that squeeze in when collapsed flagged.
Short answer: 3 of the 15 carriers we track fit Alaska Horizon's 17 × 11 × 9.5 in limit: 1 with room to spare on every side, 1 with no room to spare on at least one side and 1 only when collapsed or squeezed a little. 12 are too big.
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| Carrier | Size | Fit | Buy |
|---|---|---|---|
 Sherpa Original Deluxe (Small) up to ~8 lb · max pet 13″ long × 7.5″ tall 15 × 10 × 8.5 in is within 17 × 11 × 9.5 in — 2" spare on length, 1" on width, 1" on height. · collapsible/flex | 15 × 10 × 8.5 in | Fits | See on Amazon → |
Mr. Peanut's Gold Series Mini (Low-Profile) up to ~15 lb 17 × 11 × 9 in is within 17 × 11 × 9.5 in — 0" spare on length, 0" on width, 0.5" on height. Tightest margin is 0", so measure before you fly. · collapsible/flex | 17 × 11 × 9 in | Exact fit | Not available on Amazon right now |
Sherpa Original Deluxe (Medium) up to ~16 lb · max pet 16″ long × 9.5″ tall 10.5" tall vs a 9.5" limit — 1" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. · collapsible/flex | 17 × 11 × 10.5 in | Flexes — 1" over | See on Amazon → |
Every fit is against the published maximum; real under-seat space varies by aircraft (why). Full rules & fees: Alaska Horizon (Horizon Air) pet policy → · how Alaska Horizon (Horizon Air) ranks on fee and space →
Other airlines: Allegiant Air · American Airlines · American Eagle (regional, incl. Republic Airways) · Asiana Airlines · Austrian Airlines · Avelo Airlines
Common questions
What size pet carrier does Alaska Horizon (Horizon Air) allow in the cabin?
Alaska Horizon's published limit for a carrier under the seat in front of you is 17 × 11 × 9.5 in. The carrier must be soft-sided. Weight limit: not published. We last checked this against Alaska Horizon's own pet policy on 2026-10-09.
How many pet carriers fit Alaska Horizon's limit?
3 of the 15 carriers we track fit Alaska Horizon's 17 × 11 × 9.5 in limit: 1 with room to spare on every side, 1 with no room to spare on at least one side and 1 only when collapsed or squeezed a little. 12 are too big.
Which carriers only fit Alaska Horizon (Horizon Air) when collapsed or squeezed?
Sherpa Original Deluxe (Medium). It is over the published size until folded or pressed down, so measure yours and expect it may be checked at the gate.
Which carriers are too big for Alaska Horizon (Horizon Air)?
Petmate Soft-Sided Kennel Cab (Medium), Sleepypod Atom, Petsfit (Medium) Expandable Soft-Sided, Bergan Comfort Carrier (Small), Mr. Peanut's Gold Series Standard (Expandable), Sleepypod Air, Diggs Passenger, ibiyaya JetPaw Expandable Backpack, Away The Pet Carrier, Frisco Premium Airline-Compliant Carrier, Sherpa Original Deluxe (Large), SturdiBag Pro (Large, Flexible Height). Each is over the 17 × 11 × 9.5 in limit.
How much does Alaska Horizon (Horizon Air) charge for a pet in the cabin?
$100 each way per kennel/carrier ($35 if traveling wholly within the State of Hawai'i), subject to space. Confirm the current fee with Alaska Horizon (Horizon Air) when you book.
How many pets does Alaska Horizon (Horizon Air) allow in the cabin?
Up to 2 pets of the same species and similar size in one carrier; a second carrier only if you buy a second ticket for the adjacent seat. The carrier counts toward your carry-on allowance: a pet carrier plus a personal item, or a pet carrier plus a standard-size carry-on (on flights within Hawaii it does not count). Confirm the current limit with Alaska Horizon (Horizon Air) when you book.
How do I book a pet in the cabin on Alaska Horizon (Horizon Air)?
Reserve before the day of travel: cabin pet space is limited and first-come, first-served. The passenger traveling with the pet must be at least 18, or under 18 and accompanied by a passenger who is 18 or older. Last checked 2026-10-09.
Where can my pet sit on Alaska Horizon (Horizon Air), and who cannot travel with one?
Not in an emergency exit or bulkhead row; no pet carriers in Business Class on the A330 or 787. Last checked 2026-10-09.