Our data shows that May tends to be the cheapest month to fly to Flagstaff from Galveston. Users have commonly found prices around $406 for the month, but tickets can be as low as $264. Due to multiple factors, prepare for potentially higher prices in September.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Galveston to Flagstaff as you normally would.