Patagonia Tres Backpack 25L vs. Deuter Aviant Carry On Pro 36 SL

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

Patagonia Tres Backpack 25L

Front facing view of the Patagonia Tres Backpack 25L
Capacity25 L
Weight0.9 kg
Dimensions48×31×17 cm
Airline fit92%
Price$129

Feature by feature

Patagonia Tres Backpack 25LFeatureDeuter Aviant Carry On Pro 36 SL
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
N Passport N
Y Passthrough Y
Carry
hideable Backpack hideable
N Hip Belt N
Y Sternum Strap Y
Inside
15in Laptop 15in
1 Main Compartments 1
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder N
Y Water Resistant Y
Material
630-denier 100% nylon, 200-denier 100% recycled polyester600D PES, 420D PA

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

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. 45 accept only the Patagonia Tres Backpack 25L, and 0 accept only the Deuter Aviant Carry On Pro 36 SL.

Only the Patagonia Tres Backpack 25L fits

Air Baltic, Air China, Air Malta, 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, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Scoot, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), Tiger Airways, TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, WestJet, Xiamen.

Patagonia Tres Backpack 25L vs. Deuter Aviant Carry On Pro 36 SL: which should you pack?

The Deuter Aviant Carry On Pro 36 SL carries 11L more than the Patagonia Tres Backpack 25L (25L vs. 36L), while the Patagonia Tres Backpack 25L is the lighter pack at 0.9kg (vs. 1.34kg). For carry-on flexibility, the Patagonia Tres Backpack 25L fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Deuter Aviant Carry On Pro 36 SL; if you want to travel lighter, the Patagonia Tres Backpack 25L is the better call.