Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast to Lerwick as you normally would.
For a flight from Belfast to Lerwick, you will be flying into All Airports. Lerwick All Airports (SDZ) is just 0.2 mi from the center of the city. All Airports is the only Lerwick airport and it handles 0 inbound flights from Belfast per day. 1 airline has flights to Lerwick All Airports from Belfast on a regular basis.