Aer Flight Pack 2 vs. Ministry of Supply Boston One

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

Aer Flight Pack 2

by Aer
Front facing view of the Aer Flight Pack 2
Capacity21 L
Weight1.3 kg
Dimensions46×31×13 cm
Airline fit94%
Price$160

Feature by feature

Aer Flight Pack 2FeatureMinistry of Supply Boston One
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
top Passport top
Y Passthrough Y
Carry
hideable Backpack hideable
N Hip Belt N
N Sternum Strap Y
Inside
16in Laptop 16in
4 Main Compartments 4
Y Organizer N
Outside
× Hard Shell ×
N Rain-fly N
1, side Water Bottle Holder 1, internal
Y Water Resistant Y
Material
1680D Cordura ballistic nylon900D 100% polyester shell

Ministry of Supply Boston One

Front facing view of the Ministry of Supply Boston One
Capacity28 L
Weight1.1 kg
Dimensions47×30×20 cm
Airline fit93%
Price$250

Key differences between the Aer Flight Pack 2 and Ministry of Supply Boston One

Both have: passport pocket, luggage passthrough, backpack straps, 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. 174 accept both. 3 accept only the Aer Flight Pack 2, and 1 accept only the Ministry of Supply Boston One.

Only the Aer Flight Pack 2 fits

American Eagle, easyJet, Ravn Alaska.

Only the Ministry of Supply Boston One fits

Air Niugini.

Aer Flight Pack 2 vs. Ministry of Supply Boston One: which should you pack?

The Ministry of Supply Boston One carries 7L more than the Aer Flight Pack 2 (21L vs. 28L), while the Ministry of Supply Boston One is the lighter pack at 1.1kg (vs. 1.3kg). For carry-on flexibility, the Aer Flight Pack 2 fits 94% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Ministry of Supply Boston One; if you want to travel lighter, the Ministry of Supply Boston One is the better call.