Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast to Dortmund as you normally would.
Dortmund (DTM), located 6.3 mi from the city center, is the airport you fly into when you book flights from Belfast to Dortmund. 0 airlines have flights to Dortmund from Belfast on a regular basis. Booking flights from Belfast to Dortmund should not be difficult; the airport handles an average of 0 inbound flights from Belfast per day.