Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast to Sioux Falls as you normally would.
Sioux Falls Joe Foss Field (FSD) is the airport you will fly into if you book a flight from Belfast to Sioux Falls. You should not have trouble finding flights to Joe Foss Field from Belfast; the airport handles an average of 0 inbound flights from Belfast per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Sioux Falls airport from Belfast. It is only a 2.6 mi journey from Joe Foss Field (FSD) to Sioux Falls’s city center.