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®.
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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 2026-07-23
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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 |
|---|---|---|
| Allegiant Air | 18 × 12 × 11 in | Fits 17 × 11 × 10.5 in is within 18 × 12 × 11 in — 1" spare on length, 1" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. |
| American Airlines | 18 × 11 × 11 in | Fits 17 × 11 × 10.5 in is within 18 × 11 × 11 in — 1" spare on length, 0" on width, 0.5" on height. Tightest margin is 0", so measure before you fly. |
| Delta Air Lines | 18 × 11 × 11 in | Fits 17 × 11 × 10.5 in is within 18 × 11 × 11 in — 1" spare on length, 0" on width, 0.5" on height. Tightest margin is 0", so measure before you fly. |
| Frontier Airlines | 18 × 14 × 11 in | Fits 17 × 11 × 10.5 in is within 18 × 14 × 11 in — 1" spare on length, 3" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. |
| JSX | 17 × 13 × 11 in | Fits 17 × 11 × 10.5 in is within 17 × 13 × 11 in — 0" spare on length, 2" on width, 0.5" on height. Tightest margin is 0", so measure before you fly. |
| Porter Airlines | 21.5 × 15.5 × 10.5 in | Fits 17 × 11 × 10.5 in is within 21.5 × 15.5 × 10.5 in — 4.5" spare on length, 4.5" on width, 0" on height. Tightest margin is 0", so measure before you fly. |
| United Airlines | 18 × 11 × 11 in | Fits 17 × 11 × 10.5 in is within 18 × 11 × 11 in — 1" spare on length, 0" on width, 0.5" on height. Tightest margin is 0", so measure before you fly. |
| Air Canada | 17 × 16 × 8 in | Flexes — check height 10.5" tall vs a 8" limit — 2.5" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Air France | 18.1 × 11 × 9.4 in | Flexes — check height 10.5" tall vs a 9.4" limit — 1.1" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Alaska Airlines | 17 × 11 × 9.5 in | Flexes — check height 10.5" tall vs a 9.5" limit — 1" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Austrian Airlines | 21.7 × 15.7 × 9.1 in | Flexes — check height 10.5" tall vs a 9.1" limit — 1.4" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Avianca | 22 × 14 × 10 in | Flexes — check height 10.5" tall vs a 10" limit — 0.5" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Brussels Airlines | 21.7 × 15.7 × 9.1 in | Flexes — check height 10.5" tall vs a 9.1" limit — 1.4" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Cape Air | 17 × 12.5 × 8.5 in | Flexes — check height 10.5" tall vs a 8.5" limit — 2" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Contour Airlines | 24 × 16 × 10 in | Flexes — check height 10.5" tall vs a 10" limit — 0.5" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Hawaiian Airlines | 17 × 11 × 9.5 in | Flexes — check height 10.5" tall vs a 9.5" limit — 1" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Iberia | 17.7 × 13.8 × 9.8 in | Flexes — check height 10.5" tall vs a 9.8" limit — 0.7" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| ITA Airways | 21.7 × 15.7 × 9.1 in | Flexes — check height 10.5" tall vs a 9.1" limit — 1.4" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| JetBlue | 17 × 12.5 × 8.5 in | Flexes — check height 10.5" tall vs a 8.5" limit — 2" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| KLM Royal Dutch Airlines | 18.1 × 11 × 9.4 in | Flexes — check height 10.5" tall vs a 9.4" limit — 1.1" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Korean Air | 17.5 × 12.5 × 7.5 in | Flexes — check height 10.5" tall vs a 7.5" limit — 3" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Lufthansa | 21.7 × 15.7 × 9.1 in | Flexes — check height 10.5" tall vs a 9.1" limit — 1.4" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Royal Air Maroc | 21.7 × 15.7 × 7.9 in | Flexes — check height 10.5" tall vs a 7.9" limit — 2.6" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Southwest Airlines | 18.5 × 13.5 × 8.5 in | Flexes — check height 10.5" tall vs a 8.5" limit — 2" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Sun Country Airlines | 17 × 12 × 9 in | Flexes — check height 10.5" tall vs a 9" limit — 1.5" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Swiss International Air Lines | 21.7 × 15.7 × 9.1 in | Flexes — check height 10.5" tall vs a 9.1" limit — 1.4" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| TAP Air Portugal | 17.7 × 11.8 × 9 in | Flexes — check height 10.5" tall vs a 9" limit — 1.5" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Volaris | 17.3 × 11.8 × 7.5 in | Flexes — check height 10.5" tall vs a 7.5" limit — 3" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Vueling | 17.7 × 15.4 × 8.3 in | Flexes — check height 10.5" tall vs a 8.3" limit — 2.2" over, but the flexible-height top compresses down. Verify it squeezes under your actual seat. |
| Aegean Airlines | 15.7 × 9.8 × 9.8 in | Too big 17 × 11 × 10.5 in is over the 15.7 × 9.8 × 9.8 in limit. |
| Air Transat | 17 × 9.5 × 10 in | Too big 17 × 11 × 10.5 in is over the 17 × 9.5 × 10 in limit. |
| American Eagle (regional, incl. Republic Airways) | 16 × 12 × 8 in | Too big 17 × 11 × 10.5 in is over the 16 × 12 × 8 in limit. |
| Avelo Airlines | 17 × 9 × 13 in | Too big 17 × 11 × 10.5 in is over the 17 × 9 × 13 in limit. |
| Breeze Airways | 17 × 8 × 13 in | Too big 17 × 11 × 10.5 in is over the 17 × 8 × 13 in limit. |
| EL AL Israel Airlines | 13 × 8 × 7 in | Too big 17 × 11 × 10.5 in is over the 13 × 8 × 7 in limit. |
| Etihad Airways | 15.7 × 15.7 × 8.7 in | Too big 17 × 11 × 10.5 in is over the 15.7 × 15.7 × 8.7 in limit. |
| Finnair | 13.8 × 11.8 × 7.9 in | Too big 17 × 11 × 10.5 in is over the 13.8 × 11.8 × 7.9 in limit. |
| GOL Linhas Aéreas | 16.9 × 12.6 × 8.7 in | Too big 17 × 11 × 10.5 in is over the 16.9 × 12.6 × 8.7 in limit. |
| Norwegian | 16.9 × 12.2 × 7.9 in | Too big 17 × 11 × 10.5 in is over the 16.9 × 12.2 × 7.9 in limit. |
| SAS Scandinavian Airlines | 15.7 × 9.8 × 9.1 in | Too big 17 × 11 × 10.5 in is over the 15.7 × 9.8 × 9.1 in limit. |
| Turkish Airlines | 15.7 × 11.8 × 9.1 in | Too big 17 × 11 × 10.5 in is over the 15.7 × 11.8 × 9.1 in limit. |
| WestJet | 16 × 10 × 8.5 in | Too big 17 × 11 × 10.5 in is over the 16 × 10 × 8.5 in limit. |
| Alaska Horizon (Horizon Air) | not published | Size not published Alaska Horizon (Horizon Air) does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Alaska Horizon (Horizon Air) before you book. |
| Azul Linhas Aéreas | not published | Size not published Azul Linhas Aéreas does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Azul Linhas Aéreas before you book. |
| Southern Airways Express | not published | Size not published Southern Airways Express does not publish a maximum carrier size, so we will not compute a fit. Confirm the under-seat allowance with Southern Airways Express before you book. |
| Air New Zealand | not published | No cabin pets Air New Zealand does not accept pets in the cabin, so carrier size is not the deciding factor. Check Air New Zealand's own policy for cargo or approved pet-shipper options. |
| ANA (All Nippon Airways) | not published | No cabin pets ANA (All Nippon Airways) does not accept pets in the cabin, so carrier size is not the deciding factor. Check ANA (All Nippon Airways)'s own policy for cargo or approved pet-shipper options. |
| British Airways | not published | No cabin pets British Airways does not accept pets in the cabin, so carrier size is not the deciding factor. Check British Airways's own policy for cargo or approved pet-shipper options. |
| Cathay Pacific | not published | No cabin pets Cathay Pacific does not accept pets in the cabin, so carrier size is not the deciding factor. Check Cathay Pacific's own policy for cargo or approved pet-shipper options. |
| China Airlines | not published | No cabin pets China Airlines does not accept pets in the cabin, so carrier size is not the deciding factor. Check China Airlines's own policy for cargo or approved pet-shipper options. |
| easyJet | not published | No cabin pets easyJet does not accept pets in the cabin, so carrier size is not the deciding factor. Check easyJet's own policy for cargo or approved pet-shipper options. |
| Emirates | not published | No cabin pets Emirates does not accept pets in the cabin, so carrier size is not the deciding factor. Check Emirates's own policy for cargo or approved pet-shipper options. |
| Japan Airlines | not published | No cabin pets Japan Airlines does not accept pets in the cabin, so carrier size is not the deciding factor. Check Japan Airlines's own policy for cargo or approved pet-shipper options. |
| Qantas | not published | No cabin pets Qantas does not accept pets in the cabin, so carrier size is not the deciding factor. Check Qantas's own policy for cargo or approved pet-shipper options. |
| Qatar Airways | not published | No cabin pets Qatar Airways does not accept pets in the cabin, so carrier size is not the deciding factor. Check Qatar Airways's own policy for cargo or approved pet-shipper options. |
| Ryanair | not published | No cabin pets Ryanair does not accept pets in the cabin, so carrier size is not the deciding factor. Check Ryanair's own policy for cargo or approved pet-shipper options. |
| Singapore Airlines | not published | No cabin pets Singapore Airlines does not accept pets in the cabin, so carrier size is not the deciding factor. Check Singapore Airlines's own policy for cargo or approved pet-shipper options. |
| Virgin Atlantic | not published | No cabin pets Virgin Atlantic does not accept pets in the cabin, so carrier size is not the deciding factor. Check Virgin Atlantic's own policy for cargo or approved pet-shipper options. |
⚠️ "Fits" here means it's within the published maximum — the actual space under your seat varies by aircraft. See why →
Compared with
Sherpa Original Deluxe (Medium) vs Sleepypod Air Sherpa Original Deluxe (Medium) vs Mr. Peanut's Gold Series Standard (Expandable) Sherpa Original Deluxe (Medium) vs Petsfit Expandable Soft-Sided Sherpa Original Deluxe (Medium) vs Sherpa Original Deluxe (Small) Sherpa Original Deluxe (Medium) vs Petmate Soft-Sided Kennel Cab (Small)
Not sure this is the one? See the best carriers ranked by how many airlines they fit · compare all: carriers · fit for a specific airline: Aegean · Air · Air · Air · Air
Common questions
What are the dimensions of the Sherpa Original Deluxe (Medium)?
Its published external size is 17 × 11 × 10.5 in, rated for up to ~16 lb. Source: the manufacturer's product page.
Which airlines does the Sherpa Original Deluxe (Medium) fit?
Against published limits it fits Allegiant Air, American Airlines, Delta Air Lines, Frontier Airlines, JSX, Porter Airlines, United Airlines, Air Canada, Air France, Alaska Airlines, Austrian Airlines, Avianca, Brussels Airlines, Cape Air, Contour Airlines, Hawaiian Airlines, Iberia, ITA Airways, JetBlue, KLM Royal Dutch Airlines, Korean Air, Lufthansa, Royal Air Maroc, Southwest Airlines, Sun Country Airlines, Swiss International Air Lines, TAP Air Portugal, Volaris, Vueling, Alaska Horizon (Horizon Air), Azul Linhas Aéreas, Southern Airways Express, Air New Zealand, ANA (All Nippon Airways), British Airways, Cathay Pacific, China Airlines, easyJet, Emirates, Japan Airlines, Qantas, Qatar Airways, Ryanair, Singapore Airlines, Virgin Atlantic. Real under-seat space varies by aircraft, so confirm for your flight.