Your uncle was puzzled because his flight from Delhi to London was more than 9½ hours long but his return from London was about 8½ hours. As a student of geography how would you explain this to him?

1. The pressure gradient supported the return flight.
2. Flying along a jet stream reduces flight time.
3. The Coriolis Force deflects air reducing flight time.
4. None of the above.

Flying along a jet stream reduces flight time.