In-cabin pet carriers that fit Alaska Airlines
The carriers from our list that clear Alaska Airlines's official 17 × 11 × 9.5 in under-seat limit — sorted best-fit first, with the ones that squeeze in when collapsed flagged.
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| Carrier | Size | Fit | Buy |
|---|---|---|---|
 Sherpa Original Deluxe (Small) 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) 9.8" tall vs a 9.5" limit — 0.3" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. · collapsible/flex | 16 × 10.5 × 9.8 in | Flexes — check height | See on Amazon → |
 Sherpa Original Deluxe (Medium) 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 — check height | See on Amazon → |
Every fit is against the published maximum; real under-seat space varies by aircraft (why). Full rules & fees: Alaska Airlines pet policy →
Citing this policy data? Go ahead — sourced from the official airline page, last verified 2026-07-23. Copy a ready-made reference:
Other airlines: Delta · JetBlue · American · United · Southwest · Frontier