REI Co-op Ruckpack 18 vs. Millican Miscellaneous Adventures

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 18FeatureMillican Miscellaneous Adventures
Storage
Compression
None Expanded Capacity None
0 Opening 0
side Passport side
N Passthrough N
Carry
Backpack
removable Hip Belt N
removable Sternum Strap N
Inside
15in Laptop 15in
2 Main Compartments 3
Y Organizer N
Outside
× Hard Shell ×
N Rain-fly N
Water Bottle Holder
Y Water Resistant Y
Material
210-denier nylon ripstop100% recycled polyester made from 40 PET bottlesC6 DWR water repellent treatmentPU1500 waterproof coating

Millican Miscellaneous Adventures

Front facing view of the Millican Miscellaneous Adventures
Capacity18 L
Weight1 kg
Dimensions51×29×13 cm
Airline fit89%
Price$110

Key differences between the REI Co-op Ruckpack 18 and Millican Miscellaneous Adventures

Both have: passport pocket, laptop sleeve, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 169 accept both. 12 accept only the REI Co-op Ruckpack 18, and 0 accept only the Millican Miscellaneous Adventures.

Only the REI Co-op Ruckpack 18 fits

Air Niugini, Air Tahiti, American Eagle, Belavia, easyJet, Etihad Airways, Great Lakes Airlines, Gulf Air, Qatar Airways, Ravn Alaska, Regional Express, Virgin Australia.

REI Co-op Ruckpack 18 vs. Millican Miscellaneous Adventures: which should you pack?

The REI Co-op Ruckpack 18 carries the same capacity as the Millican Miscellaneous Adventures (18L vs. 18L), while the REI Co-op Ruckpack 18 is the lighter pack at 0.7kg (vs. 1kg). 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 REI Co-op Ruckpack 18; if you want to travel lighter, the REI Co-op Ruckpack 18 is the better call.