Osprey Sojourn Porter Travel Pack 30 vs. Peak Design Travel Backpack 45L

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

Osprey Sojourn Porter Travel Pack 30

Front facing view of the Osprey Sojourn Porter Travel Pack 30
Capacity30 L
Weight1.4 kg
Dimensions44×37×27 cm
Airline fit15%
Price$180

Feature by feature

Osprey Sojourn Porter Travel Pack 30FeaturePeak Design Travel Backpack 45L
Storage
2 Compression 1
None Expanded Capacity 45L
1 Opening 1
top Passport top
Y Passthrough Y
Carry
hideable Backpack hideable
hideable Hip Belt hideable
Y Sternum Strap removable
Inside
16in Laptop 16in
4 Main Compartments 7
Y Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder 2, side
Y Water Resistant Y
Material
bluesign®-approved Recycled 500D Nylon Packcloth PFC Free DWRshell: Weatherproof 400D nylon canvas bottom: 900D nylon weatherproof zippers

Peak Design Travel Backpack 45L

Front facing view of the Peak Design Travel Backpack 45L
Capacity35 L
Weight2.1 kg
Dimensions56×33×24 cm
Airline fit26%
Price$300

Key differences between the Osprey Sojourn Porter Travel Pack 30 and Peak Design Travel Backpack 45L

Both have: passport pocket, luggage passthrough, backpack straps, hip belt, 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. 26 accept both. 2 accept only the Osprey Sojourn Porter Travel Pack 30, and 23 accept only the Peak Design Travel Backpack 45L.

Only the Osprey Sojourn Porter Travel Pack 30 fits

Croatia Air, Gulf Air.

Only the Peak Design Travel Backpack 45L fits

Aegean Airlines, Air Astana, Air Nostrum, Atlas Global, British Airways, Conviasa, Copa Airlines, EL AL, Finnair, Frontier Airlines, Iran Aseman Air, Jet2, Kuwait Air, Middle East Airlines, Monarch Airlines, Onur Air, PenAir, Southwest Airlines, Spirit Airlines, Thai Airways, Travel Service Airlines, Uzbekistan Air, WOW Airlines.

Osprey Sojourn Porter Travel Pack 30 vs. Peak Design Travel Backpack 45L: which should you pack?

The Peak Design Travel Backpack 45L carries 5L more than the Osprey Sojourn Porter Travel Pack 30 (30L vs. 35L), while the Osprey Sojourn Porter Travel Pack 30 is the lighter pack at 1.4kg (vs. 2.1kg). For carry-on flexibility, the Peak Design Travel Backpack 45L fits 26% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Peak Design Travel Backpack 45L; if you want to travel lighter, the Osprey Sojourn Porter Travel Pack 30 is the better call.