In-cabin pet carriers that fit Sun Country Airlines
The carriers from our list that clear Sun Country Airlines' official 17 × 12 × 9 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 Sun Country Airlines' 17 × 12 × 9 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.
Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.
| 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 × 12 × 9 in — 2" spare on length, 2" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. · 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 × 12 × 9 in — 0" spare on length, 1" on width, 0" on height. Tightest margin is 0", so measure before you fly. · collapsible/flex | 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" limit — 1.5" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. · collapsible/flex | 17 × 11 × 10.5 in | Flexes — 1.5" over | See on Amazon → |
Every fit is against the published maximum; real under-seat space varies by aircraft (why). Full rules & fees: Sun Country Airlines pet policy → · how Sun Country Airlines ranks on fee and space →
Other airlines: Swiss International Air Lines · TAP Air Portugal · Transavia · Turkish Airlines · United Airlines · Viva Aerobus
Common questions
What size pet carrier does Sun Country Airlines allow in the cabin?
Sun Country Airlines' published limit for a carrier under the seat in front of you is 17 × 12 × 9 in. Weight limit: not published. We last checked this against Sun Country Airlines' own pet policy on 2026-09-06.
How many pet carriers fit Sun Country Airlines' limit?
3 of the 15 carriers we track fit Sun Country Airlines' 17 × 12 × 9 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 Sun Country 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 Sun Country Airlines?
Petmate Soft-Sided Kennel Cab (Medium), Diggs Passenger, Sleepypod Atom, Petsfit (Medium) Expandable Soft-Sided, Bergan Comfort Carrier (Small), Mr. Peanut's Gold Series Standard (Expandable), Sleepypod Air, 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 × 12 × 9 in limit.
How much does Sun Country Airlines charge for a pet in the cabin?
$75 each way (booked in advance) or $100 walk-up. Confirm the current fee with Sun Country Airlines when you book.