REI Co-op Ruckpack 18 vs. Attitude Supply ATD1

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

REI Co-op Ruckpack 18

Front facing view of the REI Co-op Ruckpack 18
Capacity18 L
Weight0.7 kg
Dimensions44×26×18 cm
Airline fit96%
Price$65

Feature by feature

REI Co-op Ruckpack 18FeatureAttitude Supply ATD1
Storage
Compression 4
None Expanded Capacity 55L
0 Opening 1
side Passport front
N Passthrough N
Carry
Backpack Y
removable Hip Belt removable
removable Sternum Strap removable
Inside
15in Laptop 15in
2 Main Compartments 2
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
Water Bottle Holder 2, side
Y Water Resistant Y
Material
210-denier nylon ripstop500d, PU coated Cordura with DWR

Attitude Supply ATD1

Front facing view of the Attitude Supply ATD1
Capacity20 L
Weight1.5 kg
Dimensions50×30×26 cm
Airline fit17%
Price$447

Key differences between the REI Co-op Ruckpack 18 and Attitude Supply ATD1

Both have: hip belt, sternum strap, laptop sleeve, built-in organizer, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 32 accept both. 149 accept only the REI Co-op Ruckpack 18, and 0 accept only the Attitude Supply ATD1.

Only the REI Co-op Ruckpack 18 fits

Aegean Airlines, Aer Lingus, Aeroflot, Aerolineas Argentinas, Aeromexico, Air Asia, Air Astana, Air Baltic, Air Canada, Air Caraibes, Air China, Air France, Air India, Air Macau, Air Malta, Air Mauritius, Air Niugini, Air Nostrum, Air Serbia, Air Seychelles, Air Tahiti, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, American Eagle, ANA, Asiana Airlines, ATA Airlines, Atlas Global, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Belavia, Biman Bangladesh, Blue Air, Boliviana de Aviacion, British Airways, Brussels Airlines, Bulgaria Air, Cambodia Angkor Air, Cathay Pacific, Cayman Airways, Cebu Pacific, China Airlines, China Eastern, CommutAir, Conviasa, Czech Airlines, Delta Airlines, Dragonair, easyJet, EL AL, Emirates Airlines, Enter Air, Ethiopian Airlines, Etihad Airways, Eurowings, EVA Air, Fiji Airways, Finnair, Flair Air, flybe, Garuda Indonesia, Gol Linhas Aereas, Great Lakes Airlines, Gulf Air, Hawaiian Airlines, Hong Kong Airlines, Iberia, Icelandair, Indigo, InselAir, Interjet, Iran Air, Iran Aseman Air, Japan Airlines, Jet Airways, Jet2, jetBlue Airways, Jetstar Airways, Jetstar Asia, Juneyao Airlines, Kenya Airways, KLM, Kulula, Kuwait Air, LATAM , Liat Airlines, LOT Polish, Lufthansa, Luxair, Mahan Air, Malaysia Airlines, Mango, Meridiana Fly, Mesa Airlines, Middle East Airlines, Monarch Airlines, Nordwind Airlines, Norwegian, Oman Air, Onur Air, Pakistan International, Peach, Porter Airlines, Qantas Airways, Qatar Airways, Ravn Alaska, Regional Express, Republic Airways, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, SAS Scandinavian, Scoot, Shandong Airlines, Shenzhen Airlines, Sky Airlines, Skywest, Inc., South African Airways, SriLankan Airlines, Sun Express, Swiss Int'l Air Lines, TAP Air Portugal, TAROM, Thai Airways, Tianjin Airlines (A320 & E190), Tiger Airways, Trans States, Travel Service Airlines, TUI, Turkish Airlines, Ukraine International, United Airlines, Uzbekistan Air, Vietnam Airlines, VIM Airlines (Closed), Virgin Atlantic, Virgin Australia, Volotea, WestJet, WOW Airlines, Xiamen.

REI Co-op Ruckpack 18 vs. Attitude Supply ATD1: which should you pack?

The Attitude Supply ATD1 carries 2L more than the REI Co-op Ruckpack 18 (18L vs. 20L), while the REI Co-op Ruckpack 18 is the lighter pack at 0.7kg (vs. 1.5kg). For carry-on flexibility, the REI Co-op Ruckpack 18 fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Attitude Supply ATD1; if you want to travel lighter, the REI Co-op Ruckpack 18 is the better call.