Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast City Airport to Londonderry as you normally would.
For a flight from Belfast City to Londonderry, you will be flying into Eglinton. Londonderry Eglinton (LDY) is just 6.7 mi from the center of the city. Eglinton is the only Londonderry airport and it handles 0 inbound flights from Belfast City per day. 0 airlines have flights to Londonderry Eglinton from Belfast City on a regular basis.