Sleepypod Atom — dimensions & which airlines it fits
Sleepypod Atom: 17 × 8.5 × 10.5 in external, up to ~12 lb. Compact, narrow (8.5" wide) soft carrier — crash-tested; the slim footprint helps on tighter aircraft, though its 10.5" height still needs an 11" airline.
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Specs
| External size (L×W×H) | 17 × 8.5 × 10.5 in |
| Type | soft-sided |
| Pet weight | up to ~12 lb |
Dimensions from the manufacturer product page · verified 2026-07-23
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Which airlines does the Sleepypod Atom 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 × 8.5 × 10.5 in is within 18 × 12 × 11 in — 1" spare on length, 3.5" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. |
| American Airlines | 18 × 11 × 11 in | Fits 17 × 8.5 × 10.5 in is within 18 × 11 × 11 in — 1" spare on length, 2.5" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. |
| Avelo Airlines | 17 × 9 × 13 in | Fits 17 × 8.5 × 10.5 in is within 17 × 9 × 13 in — 0" spare on length, 0.5" on width, 2.5" on height. Tightest margin is 0", so measure before you fly. |
| Delta Air Lines | 18 × 11 × 11 in | Fits 17 × 8.5 × 10.5 in is within 18 × 11 × 11 in — 1" spare on length, 2.5" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. |
| Frontier Airlines | 18 × 14 × 11 in | Fits 17 × 8.5 × 10.5 in is within 18 × 14 × 11 in — 1" spare on length, 5.5" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. |
| JSX | 17 × 13 × 11 in | Fits 17 × 8.5 × 10.5 in is within 17 × 13 × 11 in — 0" spare on length, 4.5" 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 × 8.5 × 10.5 in is within 21.5 × 15.5 × 10.5 in — 4.5" spare on length, 7" on width, 0" on height. Tightest margin is 0", so measure before you fly. |
| United Airlines | 18 × 11 × 11 in | Fits 17 × 8.5 × 10.5 in is within 18 × 11 × 11 in — 1" spare on length, 2.5" on width, 0.5" on height. Tightest margin is 0.5", so measure before you fly. |
| Breeze Airways | 17 × 8 × 13 in | Squeezes — 0.5" over 17 × 8.5 × 10.5 in is 0.5" over on width against a 17 × 8 × 13 in limit, and height clears with 2.5" to spare. Soft sides compress, so this usually goes under the seat — but it is over the published figure, so measure yours and be ready for an agent to check. |
| Air Canada | 17 × 16 × 8 in | Too tall (10.5" > 8") 10.5" tall exceeds the 8" limit by 2.5" and this carrier doesn't compress. |
| Air France | 18.1 × 11 × 9.4 in | Too tall (10.5" > 9.4") 10.5" tall exceeds the 9.4" limit by 1.1" and this carrier doesn't compress. |
| Air Transat | 17 × 9.5 × 10 in | Too tall (10.5" > 10") 10.5" tall exceeds the 10" limit by 0.5" and this carrier doesn't compress. |
| Alaska Airlines | 17 × 11 × 9.5 in | Too tall (10.5" > 9.5") 10.5" tall exceeds the 9.5" limit by 1" and this carrier doesn't compress. |
| Austrian Airlines | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Avianca | 22 × 14 × 10 in | Too tall (10.5" > 10") 10.5" tall exceeds the 10" limit by 0.5" and this carrier doesn't compress. |
| Brussels Airlines | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Cape Air | 17 × 12.5 × 8.5 in | Too tall (10.5" > 8.5") 10.5" tall exceeds the 8.5" limit by 2" and this carrier doesn't compress. |
| Contour Airlines | 24 × 16 × 10 in | Too tall (10.5" > 10") 10.5" tall exceeds the 10" limit by 0.5" and this carrier doesn't compress. |
| Hawaiian Airlines | 17 × 11 × 9.5 in | Too tall (10.5" > 9.5") 10.5" tall exceeds the 9.5" limit by 1" and this carrier doesn't compress. |
| Iberia | 17.7 × 13.8 × 9.8 in | Too tall (10.5" > 9.8") 10.5" tall exceeds the 9.8" limit by 0.7" and this carrier doesn't compress. |
| ITA Airways | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| JetBlue | 17 × 12.5 × 8.5 in | Too tall (10.5" > 8.5") 10.5" tall exceeds the 8.5" limit by 2" and this carrier doesn't compress. |
| KLM Royal Dutch Airlines | 18.1 × 11 × 9.4 in | Too tall (10.5" > 9.4") 10.5" tall exceeds the 9.4" limit by 1.1" and this carrier doesn't compress. |
| Korean Air | 17.5 × 12.5 × 7.5 in | Too tall (10.5" > 7.5") 10.5" tall exceeds the 7.5" limit by 3" and this carrier doesn't compress. |
| Lufthansa | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| Royal Air Maroc | 21.7 × 15.7 × 7.9 in | Too tall (10.5" > 7.9") 10.5" tall exceeds the 7.9" limit by 2.6" and this carrier doesn't compress. |
| Southwest Airlines | 18.5 × 13.5 × 8.5 in | Too tall (10.5" > 8.5") 10.5" tall exceeds the 8.5" limit by 2" and this carrier doesn't compress. |
| Sun Country Airlines | 17 × 12 × 9 in | Too tall (10.5" > 9") 10.5" tall exceeds the 9" limit by 1.5" and this carrier doesn't compress. |
| Swiss International Air Lines | 21.7 × 15.7 × 9.1 in | Too tall (10.5" > 9.1") 10.5" tall exceeds the 9.1" limit by 1.4" and this carrier doesn't compress. |
| TAP Air Portugal | 17.7 × 11.8 × 9 in | Too tall (10.5" > 9") 10.5" tall exceeds the 9" limit by 1.5" and this carrier doesn't compress. |
| Volaris | 17.3 × 11.8 × 7.5 in | Too tall (10.5" > 7.5") 10.5" tall exceeds the 7.5" limit by 3" and this carrier doesn't compress. |
| Vueling | 17.7 × 15.4 × 8.3 in | Too tall (10.5" > 8.3") 10.5" tall exceeds the 8.3" limit by 2.2" and this carrier doesn't compress. |
| Aegean Airlines | 15.7 × 9.8 × 9.8 in | Too big 17 × 8.5 × 10.5 in is over the 15.7 × 9.8 × 9.8 in limit. |
| American Eagle (regional, incl. Republic Airways) | 16 × 12 × 8 in | Too big 17 × 8.5 × 10.5 in is over the 16 × 12 × 8 in limit. |
| EL AL Israel Airlines | 13 × 8 × 7 in | Too big 17 × 8.5 × 10.5 in is over the 13 × 8 × 7 in limit. |
| Etihad Airways | 15.7 × 15.7 × 8.7 in | Too big 17 × 8.5 × 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 × 8.5 × 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 × 8.5 × 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 × 8.5 × 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 × 8.5 × 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 × 8.5 × 10.5 in is over the 15.7 × 11.8 × 9.1 in limit. |
| WestJet | 16 × 10 × 8.5 in | Too big 17 × 8.5 × 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
Sleepypod Atom vs Sleepypod Air Sleepypod Atom vs Mr. Peanut's Gold Series Mini (Low-Profile)
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Common questions
What are the dimensions of the Sleepypod Atom?
Its published external size is 17 × 8.5 × 10.5 in, rated for up to ~12 lb. Source: the manufacturer's product page.
Which airlines does the Sleepypod Atom fit?
Against published limits it fits Allegiant Air, American Airlines, Avelo Airlines, Delta Air Lines, Frontier Airlines, JSX, Porter Airlines, United Airlines, Breeze Airways, 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.