Time slots to fly from US East Coast to Europe, ranked:
1. Leave 5-6p, arrive 6-7a, if you have a place to crash/nap on arrival.
2. Leave 7-8a, arrive 8-9p (daytime flight)
3. Leave 11-12p, arrive 12-1p
4. Leave 8-9p, arrive 9-10a
5. No. 1 if you don't have a place to crash