Deuter Aviant Carry On Pro 36 SL vs. Cotopaxi Allpa Travel Pack 42L Del Día

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

Deuter Aviant Carry On Pro 36 SL

Front facing view of the Deuter Aviant Carry On Pro 36 SL
Capacity36 L
Weight1.34 kg
Dimensions55×34×23 cm
Airline fit68%
Price$128

Feature by feature

Deuter Aviant Carry On Pro 36 SLFeatureCotopaxi Allpa Travel Pack 42L Del Día
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
N Passport Y
Y Passthrough
Carry
hideable Backpack hideable
N Hip Belt removable
Y Sternum Strap Y
Inside
15in Laptop 15in
1 Main Compartments 1
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly Y
N Water Bottle Holder N
Y Water Resistant Y
Material
600D PES, 420D PA100% repurposed nylon

Cotopaxi Allpa Travel Pack 42L Del Día

Front facing view of the Cotopaxi Allpa Travel Pack 42L Del Día
Capacity42 L
Weight1.905 kg
Dimensions55×34×22.5 cm
Airline fit68%
Price$200

Key differences between the Deuter Aviant Carry On Pro 36 SL and Cotopaxi Allpa Travel Pack 42L Del Día

Both have: backpack straps, 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. 129 accept both. Every airline that takes one takes the other.

Deuter Aviant Carry On Pro 36 SL vs. Cotopaxi Allpa Travel Pack 42L Del Día: which should you pack?

The Cotopaxi Allpa Travel Pack 42L Del Día carries 6L more than the Deuter Aviant Carry On Pro 36 SL (36L vs. 42L), while the Deuter Aviant Carry On Pro 36 SL is the lighter pack at 1.34kg (vs. 1.905kg). For carry-on flexibility, the Deuter Aviant Carry On Pro 36 SL fits 68% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Cotopaxi Allpa Travel Pack 42L Del Día; if you want to travel lighter, the Deuter Aviant Carry On Pro 36 SL is the better call.