Does the Thule Aion Travel Backpack 40L fit as a carry-on?
By its listed size it fits 22 of 38 airlines that publish a carry-on limit, is borderline on 11 and is too big for 5.
Size and specs
| Listed size | 52 × 33 × 23 cm (20.5 × 13 × 9.1 in) |
|---|---|
| Volume | 40 L |
| Empty weight | 3.3 lb (1.5 kg) |
| Laptop sleeve | up to 17 in |
| Wheels | none |
| List price | $209.95 (seen 2026-10-19) |
Against the usual US limit
Dashed and yellow: American Airlines' carry-on limit, 22 × 14 × 9 in. Coloured: this bag's listed size.
Every airline
| Airline | carry-on limit | This bag |
|---|---|---|
| United States | ||
| Alaska Airlines | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| Allegiant Air | 10 × 16 × 22 in (25 × 41 × 56 cm) | Fits 0.9 in to spare |
| American Airlines | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| Avelo Airlines | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| Breeze Airways | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| Delta Air Lines | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| Frontier Airlines | 24 × 16 × 10 in (61 × 41 × 25 cm) | Fits 0.9 in to spare |
| Hawaiian Airlines | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| JetBlue | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| Southwest Airlines | 24 × 16 × 10 in (61 × 41 × 25 cm) | Fits 0.9 in to spare |
| Sun Country Airlines | 24 × 16 × 11 in (61 × 41 × 28 cm) | Fits 1.9 in to spare |
| United Airlines | 9 × 14 × 22 in (23 × 36 × 56 cm) | Borderline 0.1 in over, too deep |
| Canada & Mexico | ||
| Aeromexico | 55 × 40 × 25 cm (21.7 × 15.7 × 9.8 in) | Fits 0.8 in to spare |
| Air Canada | 9 × 15.5 × 21.5 in (23 × 39 × 55 cm) | Borderline 0.1 in over, too deep |
| Porter Airlines | 21.5 × 15.5 × 9 in (55 × 39 × 23 cm) | Borderline 0.1 in over, too deep |
| Viva Aerobus | 22 × 16 × 10 in (56 × 41 × 25 cm) | Fits 0.9 in to spare |
| Volaris | 55 × 40 × 25 cm (21.7 × 15.7 × 9.8 in) | Fits 0.8 in to spare |
| WestJet | 22 × 14 × 9 in (56 × 36 × 23 cm) | Borderline 0.1 in over, too deep |
| Latin America | ||
| Avianca | 55 × 35 × 25 cm (21.7 × 13.8 × 9.8 in) | Fits 0.8 in to spare |
| Copa Airlines | 56 × 36 × 26 cm (22 × 14.2 × 10.2 in) | Fits 1.2 in to spare |
| LATAM Airlines | 55 × 35 × 25 cm (21.7 × 13.8 × 9.8 in) | Fits 0.8 in to spare |
| Europe | ||
| Aer Lingus | 55 × 40 × 24 cm (21.7 × 15.7 × 9.4 in) | Fits 0.4 in to spare |
| Air France | 55 × 35 × 25 cm (21.7 × 13.8 × 9.8 in) | Fits 0.8 in to spare |
| British Airways | 56 × 45 × 25 cm (22 × 17.7 × 9.8 in) | Fits 0.8 in to spare |
| easyJet | 56 × 45 × 25 cm (22 × 17.7 × 9.8 in) | Fits 0.8 in to spare |
| Iberia | 56 × 40 × 25 cm (22 × 15.7 × 9.8 in) | Fits 0.8 in to spare |
| Icelandair | 55 × 40 × 20 cm (21.7 × 15.7 × 7.9 in) | Too big 1.2 in over, too deep |
| KLM | 55 × 35 × 25 cm (21.7 × 13.8 × 9.8 in) | Fits 0.8 in to spare |
| Lufthansa | 55 × 40 × 23 cm (21.7 × 15.7 × 9.1 in) | Fits right at the limit |
| Ryanair | 55 × 40 × 20 cm (21.7 × 15.7 × 7.9 in) | Too big 1.2 in over, too deep |
| Turkish Airlines | 23 × 40 × 55 cm (9.1 × 15.7 × 21.7 in) | Fits right at the limit |
| Virgin Atlantic | 23 × 36 × 56 cm (9.1 × 14.2 × 22 in) | Fits right at the limit |
| Vueling | 55 × 40 × 20 cm (21.7 × 15.7 × 7.9 in) | Too big 1.2 in over, too deep |
| Wizz Air | 55 × 40 × 23 cm (21.7 × 15.7 × 9.1 in) | Fits right at the limit |
| Middle East & Asia-Pacific | ||
| Emirates | 55 × 38 × 22 cm (21.7 × 15 × 8.7 in) | Too big 0.4 in over, too deep |
| Japan Airlines | 55 × 40 × 25 cm (21.7 × 15.7 × 9.8 in) | Fits 0.8 in to spare |
| Qantas | 56 × 36 × 23 cm (22 × 14.2 × 9.1 in) | Fits right at the limit |
| Qatar Airways | 50 × 37 × 25 cm (19.7 × 14.6 × 9.8 in) | Too big 0.8 in over, too tall |
"Borderline" means over by no more than the rounding in published sizes (0.5 cm, about 0.2 in). It may pass at the gate, but we don't promise it.
Where these numbers come from
- thule.combrand page
- thule.combrand page
- amazon.comretailer listing
Notes from our data check
thule.com blocks plain requests (403), so it was read with a page-fetch tool (numbers came via a summariser, not raw HTML). US page: 'Dimensions 13 x 9.1 x 20.5 in', 'Weight 3.2 lb', 'Volume 40 L', 'Padded storage protects up to a 17" laptop', 'Compliant with most airlines carry on requirements', $209.95. UK page: 'Dimensions 33 x 23 x 52 cm', 'Weight 1.5 kg'. The in and cm figures agree (20.5 in = 52.1 cm). Model 3204723. Reordered to [H, W, D]. CONFLICT: REI (search extract) lists a 16" laptop compartment; MEC lists 47 x 28 x 23 cm and a 15" laptop; Amazon lists 1.45 kg. Brand used. Amazon B09NL7ZVCD (model 3204723) in stock, 4.3 stars from 777 ratings, #70 in Casual Daypack Backpacks.