It’s generally more expensive to depart on a Wednesday, 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 January. For low rates, July can be a great choice for travel to Peoria. Flights to Peoria from Billings in July are about $306 on average during July, but can be found for as low as $91.
It’s typically best to fly out from Billings to Peoria in the morning. Doing so could potentially save you 39% on the flight price compared to flying at noon, which is usually more expensive.