Last year I flew from Tel Aviv to Los Angeles. The flight leaves at night (1am) and, in the winter, lands when it is still night (630am). However during the flight, over Greenland, one sees the sun then it disappears somewhere over Canada and it is night again until the "real sunrise" on the West Coast.
In this case, when is the right time for shaharit?
Normally one prays at the time of one's current location. But in this case the sun over Greenland is not the "real morning" for that day. Or maybe there are two mornings?
This is important because if the time for prayer is over Greenland and one doesn't pray there - then one cannot eat during the next 8-9 hours until one prays on the West Coast.
And if the time for prayer is over the West Coast then one cannot pray over Greenland.
I could not find answers for this situation. Has anyone encountered this situation and asked a rav? Or do you have sources that would explicity address this?
PS. See here for the return question on not praying arvit if the sun never sets