Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Abilene to Walla Walla as you normally would.
ABI and ALW are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ABI to ALW refers to a flight route from Abilene Airport to Walla Walla Airport.