Osprey Sojourn Porter 46L vs Tom Bihn Aeronaut 45
The Osprey Sojourn Porter 46L is 46L and 1.43kg3.2lb; the Tom Bihn Aeronaut 45 is 45L and 1.4kg3.1lb. The Tom Bihn Aeronaut 45 is 0.03kg0.1lb lighter. The Osprey Sojourn Porter 46L costs $155 less. The Osprey Sojourn Porter 46L fits the carry-on limit of 30 of 36 major airlines and the Tom Bihn Aeronaut 45 fits 14; under the seat, 0 and 0 of 26.
| Spec | Osprey Sojourn Porter 46L | Tom Bihn Aeronaut 45 |
|---|---|---|
| Price | $200Best | $355 |
| Volume | 46L | 45L |
| Weight | 1.43kg3.2lb | 1.4kg3.1lbBest |
| Carry-on compliance | 83%Best | 39% |
| Personal-item compliance | 0% | 0% |
| Dimensions | 55×35×23cm21.5×14×9in | 36×56×23cm14×22×9in |
| Laptop | sleeve, size not published | no laptop sleeve |
| Compartments | n/a | 5 |
| Bottle pockets | n/a | 0 |
| Compression straps | 2 | 2 |
| Opening | large duffel-style opening | Clamshell, clamshell (U-shape) |
| Warranty | Lifetime | Lifetime |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | Hideable | No |
| Sternum strap | Yes | Yes |
| Load lifters | Yes | No |
| Shoulder strap | No | Yes |
| Luggage pass-through | No | No |
| Camera compartment | No | No |
| Bike-ready | No | No |
| Material | bluesign approved 100% recycled 420D nylon with PFAS-free DWR, 200D recycled polyester lining | U.S. 1050d high-tenacity ballistic nylon exterior (default Black 1050 Ballistic), 210d Cerylon ripstop interior (bluesign-certified) |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Osprey Sojourn Porter 46L | Tom Bihn Aeronaut 45 |
|---|---|---|---|
| Air Canada | Carry-on | Fits | Too big |
| Air France | Carry-on | Fits | Too big |
| Allegiant Air | Carry-on | Fits | Too big |
| ANA (All Nippon Airways) | Carry-on | Fits | Too big |
| Avianca | Carry-on | Fits | Too big |
| Gol Linhas Aereas | Carry-on | Fits | Too big |
| IndiGo | Carry-on | Fits | Too big |
| KLM | Carry-on | Fits | Too big |
| LATAM Airlines | Carry-on | Fits | Too big |
| Lufthansa | Carry-on | Fits | Too big |
| Norwegian Air Shuttle | Carry-on | Fits | Too big |
| SAS | Carry-on | Fits | Too big |
| Turkish Airlines | Carry-on | Fits | Too big |
| United Airlines | Carry-on | Fits | Too big |
| Volaris | Carry-on | Fits | Too big |
| Wizz Air | Carry-on | Fits | Too big |
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Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.