Sherpa Original Deluxe (Medium) — dimensions & which airlines it fits
Sherpa Original Deluxe (Medium): 17 × 11 × 10.5 in external, up to ~16 lb. Spring-wire top flexes down to squeeze under lower seats. Guaranteed On Board®.
Specs
| External size (L×W×H) | 17 × 11 × 10.5 in |
| Type | soft-sided · flexible height |
| Pet weight | up to ~16 lb |
Dimensions from the manufacturer product page · verified 2026-07-03
Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.
Which airlines does the Sherpa Original Deluxe (Medium) fit?
Compared against each airline's published under-seat limit (height strict; footprint may rotate). Green = within the published size; amber = fits only when collapsed / flexed; grey = over.
| Airline | Its limit | This carrier |
|---|---|---|
| Delta Air Lines | 18 × 11 × 11 in | Fits |
| American Airlines | 18 × 11 × 11 in | Fits |
| United Airlines | 18 × 11 × 11 in | Fits |
| Frontier Airlines | 18 × 14 × 11 in | Fits |
| JetBlue | 17 × 12.5 × 8.5 in | Flexes — check height |
| Southwest Airlines | 18.5 × 13.5 × 8.5 in | Flexes — check height |
| Alaska Airlines | 17 × 11 × 9.5 in | Flexes — check height |
| Air Canada | 17 × 16 × 8 in | Flexes — check height |
⚠️ "Fits" here means it's within the published maximum — the actual space under your seat varies by aircraft. See why →
Compare carriers: all carriers · fit for a specific airline: Delta · JetBlue · American · United · Southwest