In-cabin pet carriers that fit Porter Airlines
The carriers from our list that clear Porter Airlines' official 21.5 × 15.5 × 10.5 in under-seat limit — sorted best-fit first, with the ones that squeeze in when collapsed flagged.
Short answer: 11 of the 15 carriers we track fit Porter Airlines' 21.5 × 15.5 × 10.5 in limit: 4 with room to spare on every side, 4 with no room to spare on at least one side and 3 only when collapsed or squeezed a little. 4 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 21.5 × 15.5 × 10.5 in — 6.5" spare on length, 5.5" on width, 2" 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 21.5 × 15.5 × 10.5 in — 4.5" spare on length, 4.5" on width, 1.5" on height. · collapsible/flex | 17 × 11 × 9 in | Fits | See on Amazon → |
Mr. Peanut's Gold Series Standard (Expandable) up to ~20 lb 18 × 11 × 10 in is within 21.5 × 15.5 × 10.5 in — 3.5" spare on length, 4.5" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. · collapsible/flex | 18 × 11 × 10 in | Fits | See on Amazon → |
Petmate Soft-Sided Kennel Cab (Medium) up to ~10 lb 17 × 10 × 10 in is within 21.5 × 15.5 × 10.5 in — 4.5" spare on length, 5.5" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. | 17 × 10 × 10 in | Fits | See on Amazon → |
Sherpa Original Deluxe (Medium) up to ~16 lb · max pet 16″ long × 9.5″ tall 17 × 11 × 10.5 in is within 21.5 × 15.5 × 10.5 in — 4.5" spare on length, 4.5" on width, 0" on height. Tightest margin is 0", so measure before you fly. · collapsible/flex | 17 × 11 × 10.5 in | Exact fit | See on Amazon → |
Diggs Passenger pet size not published · Diggs discontinued this carrier — link goes to similar carriers 17 × 12 × 10.5 in is within 21.5 × 15.5 × 10.5 in — 4.5" spare on length, 3.5" on width, 0" on height. Tightest margin is 0", so measure before you fly. | 17 × 12 × 10.5 in | Exact fit | Search Amazon → |
ibiyaya JetPaw Expandable Backpack up to ~17 lb 18 × 12 × 10.5 in is within 21.5 × 15.5 × 10.5 in — 3.5" spare on length, 3.5" on width, 0" on height. Tightest margin is 0", so measure before you fly. | 18 × 12 × 10.5 in | Exact fit | See on Amazon → |
Sleepypod Atom up to ~12 lb 17 × 8.5 × 10.5 in is within 21.5 × 15.5 × 10.5 in — 4.5" spare on length, 7" on width, 0" on height. Tightest margin is 0", so measure before you fly. | 17 × 8.5 × 10.5 in | Exact fit | See on Amazon → |
Sleepypod Air up to ~18 lb 22 × 10.5 × 10.5 in is 0.5" over on length against a 21.5 × 15.5 × 10.5 in limit, and height clears with 0" to spare. Soft sides compress, so this usually goes under the seat — but it is over the published figure, so measure yours and be ready for an agent to check. · collapsible/flex | 22 × 10.5 × 10.5 in | Squeezes — 0.5" over | See on Amazon → |
Sherpa Original Deluxe (Large) up to ~22 lb · max pet 18″ long × 10.5″ tall 11.5" tall vs a 10.5" limit — 1" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. · collapsible/flex | 19 × 11.75 × 11.5 in | Flexes — 1" over | See on Amazon → |
SturdiBag Pro (Large, Flexible Height) pet size not published 11.5" tall vs a 10.5" limit — 1" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. · collapsible/flex | 18 × 11.5 × 11.5 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: Porter Airlines pet policy → · how Porter Airlines ranks on fee and space →
Other airlines: Royal Air Maroc · SAS Scandinavian Airlines · Saudia · Southern Airways Express · Southwest Airlines · Sun Country Airlines
Common questions
What size pet carrier does Porter Airlines allow in the cabin?
Porter Airlines' published limit for a carrier under the seat in front of you is 21.5 × 15.5 × 10.5 in. The carrier must be soft-sided. Weight limit: not published. We last checked this against Porter Airlines' own pet policy on 2026-08-14.
How many pet carriers fit Porter Airlines' limit?
11 of the 15 carriers we track fit Porter Airlines' 21.5 × 15.5 × 10.5 in limit: 4 with room to spare on every side, 4 with no room to spare on at least one side and 3 only when collapsed or squeezed a little. 4 are too big.
Which carriers only fit Porter Airlines when collapsed or squeezed?
Sleepypod Air, Sherpa Original Deluxe (Large), SturdiBag Pro (Large, Flexible Height). Each 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 Porter Airlines?
Away The Pet Carrier, Petsfit (Medium) Expandable Soft-Sided, Bergan Comfort Carrier (Small), Frisco Premium Airline-Compliant Carrier. Each is over the 21.5 × 15.5 × 10.5 in limit.
How much does Porter Airlines charge for a pet in the cabin?
$50–$57.50 per direction ($50.00 CAD/USD plus applicable taxes) · non-refundable. Confirm the current fee with Porter Airlines when you book.