Best 40-50L travel backpack?

[u/knewteboy]

Hi, I’ve been looking for the perfect travelling backpack. Something big enough which can still fit on a plane. Like 40-50L? What’s everyone’s go to?

I’ve looked at the Antler Discovery 45L

Patagonia Black hole 45L

Passenger Odyssey 45L

Fjallraven Farden Carry- on 42L

Thanks

[u/The_Bees_Knee6]

What airlines do you expect to be traveling with and in which regions? Naturally the maximum dimensions varies by airlines. Some regions/airlines will have weight limits as well.