According to Dale Arden, Flash has 14 hours to save the Earth in the 1980 film "Flash Gordon."
14 martian days x 24.623 earth hours in a martian day = 344.72 earth hours
The rotation period of Neptune is 16.1 earth hours.
The Earth makes one rotation on its own axis every 24 hours.
A day on Jupiter is less than 10 Earth hours
Earth, Jupiter's days only last about 10 hours.
The duration of Flash Gordon - serial - is 4.08 hours.
The duration of Flash Point - film - is 1.47 hours.
The duration of Royal Flash - film - is 1.7 hours.
The duration of Flash of Genius - film - is 1.98 hours.
The duration of Flash Gordon's Trip to Mars is 4.98 hours.
The duration of Flash Gordon Conquers the Universe is 3.67 hours.
3 hours 11 minutes according to Google Earth!
A flash flood.
A flash flood
according to google earth about 325 km or about 3 hours 29 minutes
Of course they will flash until the battery runs down. So the time depends on how good the battery is. I have personally seen them flash for 6 hours straight.
10.233 earth hours