In-cabin pet carriers that fit Alaska Airlines
The carriers from our list that clear Alaska Airlines' 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 Airlines' 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 · full fit detail → | 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 · full fit detail → | 17 × 11 × 9 in | Exact fit | See on Amazon → |
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 · full fit detail → | 17 × 11 × 10.5 in | Flexes — 1" over | See on Amazon → |
Also checked, too big for Alaska Airlines: 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 one shows the exact measurement it misses by.
Every fit is against the published maximum; real under-seat space varies by aircraft (why). Full rules & fees: Alaska Airlines pet policy → · how Alaska Airlines ranks on fee and space →
Other airlines: Alaska Horizon (Horizon Air) · Allegiant Air · American Airlines · American Eagle (regional, incl. Republic Airways) · Asiana Airlines · Austrian Airlines
Common questions
What size pet carrier does Alaska Airlines allow in the cabin?
Alaska Airlines' 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 Airlines' own pet policy on 2026-09-24.
How many pet carriers fit Alaska Airlines' limit?
3 of the 15 carriers we track fit Alaska Airlines' 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 Airlines 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 Airlines?
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 Airlines 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 Airlines when you book.