Wandrd Duo Daypack vs. Thule Aion 40L

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

Wandrd Duo Daypack

Front facing view of the Wandrd Duo Daypack
Capacity20 L
Weight1.2 kg
Dimensions50×29×17 cm
Airline fit92%
Price$235

Feature by feature

Wandrd Duo DaypackFeatureThule Aion 40L
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
top Passport top
Y Passthrough Y
Carry
Y Backpack Y
removable Hip Belt optional
Y Sternum Strap Y
Inside
15in Laptop 16in
4 Main Compartments 4
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
1, side Water Bottle Holder 1, side
Y Water Resistant Y
Material
840D Jr. Ballistic Nylon with 5pm coating and 1680D Ballistic Nylon. Weather Resistant YKK Zippers.

Thule Aion 40L

Front facing view of the Thule Aion 40L
Capacity40 L
Weight1.5 kg
Dimensions52×33×23 cm
Airline fit70%
Price$200

Key differences between the Wandrd Duo Daypack and Thule Aion 40L

Both have: passport pocket, luggage passthrough, 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. 132 accept both. 41 accept only the Wandrd Duo Daypack, and 0 accept only the Thule Aion 40L.

Only the Wandrd Duo Daypack fits

Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Oman Air, Pakistan International, Qatar Airways, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), TUI, Ukraine International, VIM Airlines (Closed), Volotea, Xiamen.

Wandrd Duo Daypack vs. Thule Aion 40L: which should you pack?

The Thule Aion 40L carries 20L more than the Wandrd Duo Daypack (20L vs. 40L), while the Wandrd Duo Daypack is the lighter pack at 1.2kg (vs. 1.5kg). For carry-on flexibility, the Wandrd Duo Daypack fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Thule Aion 40L; if you want to travel lighter, the Wandrd Duo Daypack is the better call.