Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Galway to Donegal as you normally would.
Donegal (CFN), located 28.5 mi from the city centre, is the airport you fly into when you book flights from Galway to Donegal. 0 airlines have flights to Donegal from Galway on a regular basis. Booking flights from Galway to Donegal should not be difficult; the airport handles an average of 0 inbound flights from Galway per day.