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 Harlingen, Texas as you normally would.
For a flight from Belfast City to Harlingen, you will be flying into Valley Intl. Harlingen Valley Intl (HRL) is just 3.7 mi from the center of the city. Valley Intl is the only Harlingen airport and it handles 0 inbound flights from Belfast City per day. 0 airlines have flights to Harlingen Valley Intl from Belfast City on a regular basis.