It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, February can be a great choice for travel to Midland. Flights to Midland from Billings in February are about $397 on average during February, but can be found for as low as $319.
A simple way to save on the total cost of your ticket is to fly from Billings to Midland in the morning. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the noon.