Antler Discovery 45L Backpack vs Osprey Sojourn Porter 46L
The Antler Discovery 45L Backpack is 45L and 1.47kg3.2lb; the Osprey Sojourn Porter 46L is 46L and 1.43kg3.2lb. The Osprey Sojourn Porter 46L is 0.04kg0.1lb lighter. The Osprey Sojourn Porter 46L costs $40 less. The Antler Discovery 45L Backpack fits the carry-on limit of 14 of 36 major airlines and the Osprey Sojourn Porter 46L fits 30; under the seat, 0 and 0 of 26.
| Spec | Antler Discovery 45L Backpack | Osprey Sojourn Porter 46L |
|---|---|---|
| Price | $240 | $200Best |
| Volume | 45L | 46L |
| Weight | 1.47kg3.2lb | 1.43kg3.2lbBest |
| Carry-on compliance | 39% | 83%Best |
| Personal-item compliance | 0% | 0% |
| Dimensions | 55×35×24cm21.5×14×9.5in | 55×35×23cm21.5×14×9in |
| Laptop | 16" | sleeve, size not published |
| Compression straps | n/a | 2 |
| Opening | Clamshell, Full side opening for suitcase-style packing | large duffel-style opening |
| Warranty | Lifetime | Lifetime |
| Organizer | Yes | Yes |
| Shoe compartment | Yes | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | Yes |
| Rain cover | No | No |
| MOLLE | No | No |
| Hip belt | No | Hideable |
| Sternum strap | Yes | Yes |
| Load lifters | No | Yes |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | No |
| Camera compartment | No | No |
| Material | Water-repellent recycled polyester | bluesign approved 100% recycled 420D nylon with PFAS-free DWR, 200D recycled polyester lining |
| Last checked | 2026-10 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Antler Discovery 45L Backpack | Osprey Sojourn Porter 46L |
|---|---|---|---|
| Air Canada | Carry-on | Too big | Fits |
| AirAsia | Carry-on | Too big | Fits |
| Alaska Airlines | Carry-on | Too big | Fits |
| American Airlines | Carry-on | Too big | Fits |
| Cebu Pacific | Carry-on | Too big | Fits |
| Delta Air Lines | Carry-on | Too big | Fits |
| JetBlue Airways | Carry-on | Too big | Fits |
| Lufthansa | Carry-on | Too big | Fits |
| Norwegian Air Shuttle | Carry-on | Too big | Fits |
| Qantas | Carry-on | Too big | Fits |
| SAS | Carry-on | Too big | Fits |
| Turkish Airlines | Carry-on | Too big | Fits |
| United Airlines | Carry-on | Too big | Fits |
| Vietjet Air | Carry-on | Too big | Fits |
| WestJet | Carry-on | Too big | Fits |
| Wizz Air | Carry-on | Too big | Fits |
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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.