Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Surabaya to Texas as you normally would.
Most people fly from Surabaya Juanda (SUB) if they book a flight from Surabaya to Texas. Surabaya Juanda is conveniently located just 15.0 km from Surabaya’s city centre.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Surabaya Juanda Airport to Dallas/Fort Worth Airport flight would often be abbreviated as a SUB to DFW flight. Houston George Bush Intcntl Airport (IAH), Austin Bergstrom Airport (AUS), Houston Hobby Airport (HOU), San Antonio Airport (SAT), Dallas Love Field Airport (DAL) are some additional IATA codes for airports related to your trip.