This allows the same aircraft to generate revenue for much of the day instead of remaining parked for long periods.
The schedule isn’t designed only around passengers.
It is also designed around the airplane itself.
Time Zones Make Overnight Flights Especially Useful
The difference in time between North America and Europe plays a huge role.
When traveling eastward, passengers cross several time zones and effectively move forward in the clock.
A flight that leaves New York in the evening can arrive in London the following morning, even though the actual flight may only last several hours.
That makes the overnight journey particularly convenient.
You leave after your normal working day, spend the night in the air, and arrive when the new day is beginning.
Traveling in the opposite direction can feel very different.
When flying from Europe toward North America, the aircraft is traveling west and effectively follows the clock backward.