At The Break Of Dawn app for iPhone and iPad

This software calculates the sunrise time while on an airplane.
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By inputing departure time, arrival time, sunrise time of departure place and sunrise time of arrival place, this calculate the sunrise time while on the airplane.
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The unit of time to enter is Greenwich Mean Time GMT (Z Time, UTC).
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Only eastbound flight is applicable.
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For Example:

Step 1.
Check Flight information and convert to UTC Time.
From Los Angels at 23:55(PDT) to New York, departed at 8:32(EDT)
===> FROM 0655Z(UTC) TO 1232Z(UTC), (5h37m-flight)

Step 2.
Check Time of Sunrise at both departure and arrival place, then convert to UTC Time.
Time of Sunrise at Los Angels is 6:00(PDT) and New York is 5:47
===> 1300Z at Los Angels, 0947Z at New York

Step 3. Enter 4 items above.
You will get the Sunrise time on board.
Sunrise time will be 1131Z, 4h36m after depart, 1h01m before arrival.