Osprey Porter 46 vs. Ortlieb Atrack BP

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

Osprey Porter 46

Front facing view of the Osprey Porter 46
Capacity46 L
Weight1.5 kg
Dimensions55×36×23 cm
Airline fit61%
Price$185

Feature by feature

Osprey Porter 46FeatureOrtlieb Atrack BP
Storage
2 Compression Y
None Expanded Capacity None
1 Opening 0
top Passport N
Y Passthrough N
Carry
hideable Backpack Y
hideable Hip Belt Y
Y Sternum Strap Y
Inside
16in Laptop N
4 Main Compartments 1
Y Organizer N
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder 2
Y Water Resistant Y
Material
bluesign®-approved Recycled 500D Nylon Packcloth PFC Free DWRPS21R

Ortlieb Atrack BP

Front facing view of the Ortlieb Atrack BP
Capacity25 L
Weight1.3 kg
Dimensions56×26×25 cm
Airline fit27%
Price$250

Key differences between the Osprey Porter 46 and Ortlieb Atrack BP

Both have: sternum strap, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 49 accept both. 67 accept only the Osprey Porter 46, and 2 accept only the Ortlieb Atrack BP.

Only the Osprey Porter 46 fits

Aer Lingus, Aeroflot, Aeromexico, Air Asia, Air Canada, Air Caraibes, Air Macau, Air Wisconsin, AirAsiaX, Alaska Airlines, All Nipon Airways, Allegiant Air, American Airlines, ANA, Austrian, Avianca , Azerbaijan Airlines, Bahamasair, Bangkok Airways, Biman Bangladesh, Brussels Airlines, Cambodia Angkor Air, Cathay Pacific, Cebu Pacific, China Airlines, CommutAir, Czech Airlines, Delta Airlines, Dragonair, Ethiopian Airlines, Eurowings, EVA Air, Fiji Airways, Flair Air, Garuda Indonesia, Gol Linhas Aereas, Hawaiian Airlines, Hong Kong Airlines, Iberia, Interjet, Iran Air, Japan Airlines, jetBlue Airways, Jetstar Airways, Jetstar Asia, Kulula, LOT Polish, Lufthansa, Mahan Air, Malaysia Airlines, Mango, Mesa Airlines, Norwegian, Peach, Porter Airlines, Qantas Airways, Republic Airways, SAS Scandinavian, Skywest, Inc., South African Airways, SriLankan Airlines, Swiss Int'l Air Lines, Trans States, Turkish Airlines, United Airlines, Vietnam Airlines, Virgin Atlantic.

Only the Ortlieb Atrack BP fits

Croatia Air, Great Lakes Airlines.

If you're constantly fighting with limited luggage space then the Osprey Porter 46 is a backpack you should seriously consider. It offers an impressive 46 liters of capacity and it's been rated to be compatible with up to 47% of airlines. The capaciousness, combined with a durable nylon construction, means this backpack is capable of handling heavy loads. Plus, it comes with a laptop compartment designed to fit a 1-inch laptop. Testimonials from users tout this backpack as a "durable option for those who tend to carry more" and commend its "great organization" and "smart features."

In comparison, the Ortlieb Atrack BP, made from PS21R, is a sturdy and waterproof backpack that stands a bit taller but narrower. It holds 25 liters of gear while weighing slightly less at 1.3 pounds and is compatible with around 38% of airlines. While its capacity may seem shy in comparison to the Osprey, the Atrack BP has a focused speciality. Designed with cyclists in mind, it has a bikepacking/adventure travel focused purpose. Reviewers commend it for its "rugged" character, "comfort", and "extremely well-thought-out ventilation".

Both backpacks offer unique perks. Compared in bullet points:

In summary, both the Osprey Porter 46 and the Ortlieb Atrack BP cater to different needs. If you're someone who values capacity and versatility, you cannot go wrong with the Osprey Porter 46. However, if your pursuits demand a slimmer, robust pack designed for biking adventures, the Ortlieb Atrack BP can rise to the occasion seamlessly. Personal preference, largely based on intended use, will guide the final choice. Both these backpacks deliver in their distinct domains, bringing comfort, durability, and usability to the forefront.