Sherpa Original Deluxe (Medium) vs Sleepypod Air: which airline pet carrier?
Short answer: The Sherpa Original Deluxe (Medium) is within the published size limit of more airlines: 11 of the 58 that publish one, against 0 for the Sleepypod Air. In the table, the Sherpa Original Deluxe (Medium) is amber for another 28 airlines and the Sleepypod Air for another 11: over the published size, so each would have to be collapsed, flexed or squeezed to go under the seat. Each amber row shows by how much.
Both carriers compared the way an airline sees them: by published size against each airline's under-seat limit. Sherpa Original Deluxe (Medium) is 17 × 11 × 10.5 in; Sleepypod Air is 22 × 10.5 × 10.5 in.
Side by side
| Property | Sherpa Original Deluxe (Medium) | Sleepypod Air |
|---|---|---|
| External size (L×W×H) | 17 × 11 × 10.5 in | 22 × 10.5 × 10.5 in |
| Type | soft-sided · flexible height | soft-sided · collapsible |
| Pet weight | up to ~16 lb | up to ~18 lb |
| Airlines it fits outright | 11 of 58 | 0 of 58 |
Airline by airline
Green = within the published size; amber = fits only collapsed / flexed; grey = over. Height is strict — it's the dimension a seat won't negotiate on.
No airlines match.
| Airline | Original Deluxe (Medium) | Air |
|---|---|---|
| Aegean Airlines | Too big | Too big |
| Air Canada | Flexes — 2.5" over | Too big |
| Air Europa | Too big | Too big |
| Air France | Flexes — 1.1" over | Too big |
| Air Transat | Too big | Too big |
| airBaltic | Flexes — 1.4" over | Too big |
| Alaska Airlines | Flexes — 1" over | Too big |
| Alaska Horizon (Horizon Air) | Flexes — 1" over | Too big |
| Allegiant Air | Fits | Fits collapsed |
| American Airlines | Exact fit | Fits collapsed |
| American Eagle (regional, incl. Republic Airways) | Exact fit | Fits collapsed |
| Asiana Airlines | Too tall (10.5" > 10.2" soft max) | Too big |
| Austrian Airlines | Flexes — 1.4" over | Too big |
| Avelo Airlines | Too big | Too big |
| Avianca | Flexes — 0.5" over | Too tall (10.5" > 10") |
| Azul Linhas Aéreas | Too big | Too big |
| Breeze Airways | Too big | Too big |
| Brussels Airlines | Flexes — 1.4" over | Too big |
| Cape Air | Flexes — 2" over | Too big |
| Condor | Flexes — 1.5" over | Too big |
| Contour Airlines | Flexes — 0.5" over | Too tall (10.5" > 10") |
| Copa Airlines | Exact fit | Fits collapsed |
| Delta Air Lines | Exact fit | Fits collapsed |
| Discover Airlines | Flexes — 1.4" over | Too big |
| Edelweiss | Flexes — 1.4" over | Too big |
| EL AL Israel Airlines | Too big | Too big |
| Etihad Airways | Too big | Too big |
| Eurowings | Flexes — 1.4" over | Too big |
| Finnair | Flexes — 2.6" over | Too big |
| Frontier Airlines | Fits | Fits collapsed |
| GOL Linhas Aéreas | Too big | Too big |
| Hawaiian Airlines | Flexes — 1" over | Too big |
| Iberia | Flexes — 0.7" over | Too big |
| ITA Airways | Flexes — 1.4" over | Too big |
| JetBlue | Flexes — 2" over | Too big |
| JSX | Exact fit | Fits collapsed |
| KLM Royal Dutch Airlines | Flexes — 1.1" over | Too big |
| Korean Air | Too tall (10.5" > 9.8" soft max) | Too big |
| LATAM Airlines | Too big | Too big |
| LOT Polish Airlines | Flexes — 2.6" over | Too big |
| Lufthansa | Flexes — 1.4" over | Too big |
| Norwegian | Too big | Too big |
| Pegasus Airlines | Fits | Fits collapsed |
| Porter Airlines | Exact fit | Squeezes — 0.5" over |
| Royal Air Maroc | Soft-sided not accepted | Soft-sided not accepted |
| SAS Scandinavian Airlines | Too big | Too big |
| Saudia | Fits | Fits collapsed |
| Southwest Airlines | Too big | Too big |
| Sun Country Airlines | Flexes — 1.5" over | Too big |
| Swiss International Air Lines | Flexes — 1.4" over | Too big |
| TAP Air Portugal | Flexes — 1.5" over | Too big |
| Transavia | Too big | Too big |
| Turkish Airlines | Too big | Too big |
| United Airlines | Exact fit | Fits collapsed |
| Viva Aerobus | Flexes — 2.2" over | Too big |
| Volaris | Flexes — 3" over | Too big |
| Vueling | Flexes — 2.2" over | Too big |
| WestJet | Too big | Too big |
19 airlines where size doesn't decide it (no pets in the cabin, or no published size)
| Aer Lingus | No cabin pets | No cabin pets |
| Aeroméxico | Size not published | Size not published |
| Air New Zealand | No cabin pets | No cabin pets |
| ANA (All Nippon Airways) | No cabin pets | No cabin pets |
| British Airways | No cabin pets | No cabin pets |
| Cathay Pacific | No cabin pets | No cabin pets |
| China Airlines | No cabin pets | No cabin pets |
| Croatia Airlines | Size not published | Size not published |
| easyJet | No cabin pets | No cabin pets |
| Emirates | No cabin pets | No cabin pets |
| Icelandair | No cabin pets | No cabin pets |
| Japan Airlines | No cabin pets | No cabin pets |
| Mokulele Airlines | Size not published | Size not published |
| Qantas | No cabin pets | No cabin pets |
| Qatar Airways | No cabin pets | No cabin pets |
| Ryanair | No cabin pets | No cabin pets |
| Singapore Airlines | No cabin pets | No cabin pets |
| Southern Airways Express | Size not published | Size not published |
| Virgin Atlantic | No cabin pets | No cabin pets |
Which should you buy?
The Sherpa Original Deluxe (Medium) — it is within the published limit of 11 of the 58 airlines with a published cabin limit, against 0 for the Sleepypod Air. That is the whole verdict on airline fit; real under-seat space still varies by aircraft and seat.
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Choose the Sherpa Original Deluxe (Medium) if…
- Spring-wire top flexes down to squeeze under lower seats. Guaranteed On Board®.
- It clears 11 of 58 airlines with a published cabin limit outright — more than the Sleepypod Air.
- Your pet is under ~16 lb.
Choose the Sleepypod Air if…
- The ends fold in, so the 22" length collapses down to ~16" to fit shorter foot-wells. Length is what collapses — height stays ~10.5", so it still needs an 11" airline.
- It clears 0 of 58 airlines with a published cabin limit outright.
- Your pet is under ~18 lb.
Full profiles: Sherpa Original Deluxe (Medium) · Sleepypod Air · best carriers ranked · all carriers
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Common questions
Which fits more airlines, the Sherpa Original Deluxe (Medium) or the Sleepypod Air?
The Sherpa Original Deluxe (Medium) — it's within the published limit of 11 of the 58 airlines with a published cabin limit, against 0 for the other. Real under-seat space still varies by aircraft.
What's the size difference?
Sherpa Original Deluxe (Medium): 17 × 11 × 10.5 in (up to ~16 lb). Sleepypod Air: 22 × 10.5 × 10.5 in (up to ~18 lb). They stand equally tall — and height is the strict dimension under a seat.
Are these figures measured or published?
Published — both sets of dimensions come from the manufacturers' product pages (linked on each carrier's profile), matched against each airline's official carrier limit. We don't invent measurements.