Aer Flight Pack 3 vs Think Tank DarkLight 20L
The Aer Flight Pack 3 is 20L and 1.5kg3.3lb; the Think Tank DarkLight 20L is 20L and 1.54kg3.4lb. The Aer Flight Pack 3 is 0.04kg0.1lb lighter. The Aer Flight Pack 3 costs $20.75 less. The Aer Flight Pack 3 fits the carry-on limit of 36 of 36 major airlines and the Think Tank DarkLight 20L fits 32; under the seat, 1 and 0 of 26.
| Spec | Aer Flight Pack 3 | Think Tank DarkLight 20L |
|---|---|---|
| Price | $179Best | $199.75 |
| Volume | 20L | 20L |
| Weight | 1.5kg3.3lbBest | 1.54kg3.4lb |
| Carry-on compliance | 100%Best | 89% |
| Personal-item compliance | 4%Best | 0% |
| Dimensions | 46×30×14cm18×12×5.5in | 49.5×30.5×21.6cm19.5×12×8.5in |
| Laptop | 16" | 16" |
| Compartments | 3 | n/a |
| Bottle pockets | 1 | 1 |
| Compression straps | 0 | n/a |
| Opening | n/a | Panel access, back panel + top |
| Warranty | Lifetime | Lifetime |
| Organizer | Yes | No |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| Rain cover | No | Yes |
| MOLLE | No | Yes |
| Hip belt | No | Removable |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | Yes | No |
| Luggage pass-through | Yes | Yes |
| Camera compartment | No | Yes |
| Material | 1680D Cordura ballistic nylon exterior (bluesign approved), soft woven lining, YKK zippers | 600D polyester PU, 1680D ballistic nylon, PFC-free DWR |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Aer Flight Pack 3 | Think Tank DarkLight 20L |
|---|---|---|---|
| Air Arabia | Carry-on | Fits | Too big |
| Air India | Carry-on | Fits | Too big |
| Frontier Airlines | Personal item | Fits | Too big |
| Ryanair | Carry-on | Fits | Too big |
| Vueling | 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.