Sherpa Original Deluxe (Medium) vs Sleepypod Air: which airline pet carrier?
Two of the most cross-shopped in-cabin carriers, compared the way an airline sees them: by published size against each 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 ~17.5 lb |
| Airlines it fits outright | 5 of 12 | 0 of 12 |
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.
| Airline | Original Deluxe (Medium) | Air |
|---|---|---|
| Delta Air Lines | Fits | Fits collapsed |
| JetBlue | Flexes — check height | Too big |
| American Airlines | Fits | Fits collapsed |
| United Airlines | Fits | Fits collapsed |
| Southwest Airlines | Flexes — check height | Too big |
| Alaska Airlines | Flexes — check height | Too big |
| Frontier Airlines | Fits | Fits collapsed |
| Air Canada | Flexes — check height | Too big |
| Allegiant Air | Fits | Fits collapsed |
| Sun Country Airlines | Flexes — check height | Too big |
| Hawaiian Airlines | Flexes — check height | Too big |
| Breeze Airways | Too big | Too big |
⚠️ "Fits" means within the published maximum — real under-seat space varies by aircraft and seat. See why →
Choose the Sherpa Original Deluxe (Medium) if…
- Spring-wire top flexes down to squeeze under lower seats. Guaranteed On Board®.
- It clears 5 of 12 tracked airlines 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 12 tracked airlines outright.
- Your pet is under ~17.5 lb.
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