a flight that takes off from New York at 8 p.m. can arrive in London around 8 a.m. the following day. This allows passengers to go directly to meetings, conferences, connections, or work activities without wasting valuable time.
Now imagine the opposite: taking off during the day and landing at night in Europe. The passenger would have to pay for a hotel immediately, sleep disoriented by the time change,
and lose part of the next day recovering from fatigue.
For airlines, this makes the flight much less attractive
