Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Lubbock to Bangkok as you normally would.
For a flight from Lubbock to Bangkok, you will be flying from Lubbock. Lubbock (LBB) is just 6.2 mi from the center of the city. Lubbock is the only Lubbock airport and it handles 0 outbound flights to Bangkok per day. 2 airlines have flights to Bangkok from Lubbock on a regular basis.
Before booking your flight from Lubbock to Bangkok check out the most popular airlines for this route: American Airlines, Qatar Airways or United Airlines.