Jet lag is worse when you travel east. The reason is pretty simple — your internal clock is better prepared to travel backward (west) than speed up (east).
If you're ever island-hopping in Scotland you can take the world’s shortest commercial flight. From the island of Westray to Papa Westray the flight takes 1 minute and 14 seconds.
The longest commercial flight takes 19 non-stop hours and is from Singapore to New York — that's five meals, two naps, four stretches, and five rom-coms.
It's standard practice that airplane pilots and their co-pilots eat different meals before and during their flights. That way if one pilot gets food poisoning, the other can take over.