Petsfit Expandable Soft-Sided — dimensions & which airlines it fits
Petsfit Expandable Soft-Sided: 17 × 11 × 11 in external, up to ~15 lb. Zips to a compliant 17×11×11 for boarding, expands for extra room at the gate. Budget-friendly.
Specs
| External size (L×W×H) | 17 × 11 × 11 in |
| Type | soft-sided · expandable at the gate |
| Pet weight | up to ~15 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 Petsfit Expandable Soft-Sided 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 | Too tall (11" > 8.5") |
| Southwest Airlines | 18.5 × 13.5 × 8.5 in | Too tall (11" > 8.5") |
| Alaska Airlines | 17 × 11 × 9.5 in | Too tall (11" > 9.5") |
| Air Canada | 17 × 16 × 8 in | Too tall (11" > 8") |
⚠️ "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