So 20 miles per hour across 24 hours gets us a distance of 480 miles.
Going from Europe to the Americas by way of Scotland and Iceland is going to be a bit of a problem for that bird, as it can expect pretty consistent 10-20kt headwinds for the entire journey. America to Europe by that route is a comparatively easy trip.
I doubt that owls are capable of effective dynamic soaring, but that would drastically reduce the energy requirements.
Going from Europe to the Americas by way of Scotland and Iceland is going to be a bit of a problem for that bird, as it can expect pretty consistent 10-20kt headwinds for the entire journey. America to Europe by that route is a comparatively easy trip.
I doubt that owls are capable of effective dynamic soaring, but that would drastically reduce the energy requirements.
Owls are librulz, they only want to escape the us, not return