Bellroy Transit Backpack Plus vs. REI Co-op Trail 40

Two carry-on travel backpacks, compared spec for spec.

Bellroy Transit Backpack Plus

Front facing view of the Bellroy Transit Backpack Plus
Capacity38 L
Weight1.5 kg
Dimensions55×38×24 cm
Airline fit19%
Price$320

Feature by feature

Bellroy Transit Backpack PlusFeatureREI Co-op Trail 40
Storage
N Compression 4
None Expanded Capacity None
1 Opening 1
top Passport top
N Passthrough N
Carry
Y Backpack Y
N Hip Belt Y
removable Sternum Strap removable
Inside
16in Laptop N
4 Main Compartments 5
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly Y
2, side Water Bottle Holder 2, side
Y Water Resistant Y
Material
Baida Nylon210-denier ripstop nylon

REI Co-op Trail 40

Capacity40 L
Weight1.2 kg
Dimensions56×30×23 cm
Airline fit47%
Price$130

Key differences between the Bellroy Transit Backpack Plus and REI Co-op Trail 40

Both have: passport pocket, backpack straps, sternum strap, built-in organizer, water bottle pockets, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 25 accept both. 10 accept only the Bellroy Transit Backpack Plus, and 63 accept only the REI Co-op Trail 40.

Only the Bellroy Transit Backpack Plus fits

Aer Lingus, Aeroflot, Aeromexico, Air Caraibes, Czech Airlines, Gol Linhas Aereas, Iberia, Interjet, Japan Airlines, Peach.

Only the REI Co-op Trail 40 fits

Air Asia, Air Europa, Air Koryo, Air Macau, Air Tahiti Nui, Air Wisconsin, AirAsiaX, Alaska Airlines, Allegiant Air, American Airlines, Avianca , Azul Linhas, Bahamasair, Bangkok Airways, Biman Bangladesh, Cambodia Angkor Air, Caribbean Airlines, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Southern, CommutAir, Conviasa, Copa Airlines, Croatia Air, Cubana de Aviacion, Delta Airlines, Dragonair, EVA Air, Garuda Indonesia, Hainan Airlines, Hawaiian Airlines, Hong Kong Airlines, Iran Aseman Air, jetBlue Airways, Jetstar Airways, Jetstar Asia, Korean Air, Kulula, Malaysia Airlines, Mango, Philippine Airlines, Qantas Airways, Republic Airways, Royal Air Morocco, Saudi Arabian Airlines, Sichuan Airlines, SilkAir, Silver Airways, Singapore Airlines, Skywest, Inc., South African Airways, SpiceJet, SriLankan Airlines, TAAG Angola, TAM Airlines, Trans States, United Airlines, Ural Airlines, Uzbekistan Air, Vietnam Airlines, Virgin Atlantic.

Bellroy Transit Backpack Plus vs. REI Co-op Trail 40: which should you pack?

The REI Co-op Trail 40 carries 2L more than the Bellroy Transit Backpack Plus (38L vs. 40L), while the REI Co-op Trail 40 is the lighter pack at 1.2kg (vs. 1.5kg). For carry-on flexibility, the REI Co-op Trail 40 fits 47% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the REI Co-op Trail 40; if you want to travel lighter, the REI Co-op Trail 40 is the better call.