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.
When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 28 days in advance, which can save you up to 11% on flights from Billings to Washington Dulles Intl compared to booking the week you need them. Waiting 28 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $252. For sooner than that we have options available in the next 3 days from $276.
Flights from Billings to Washington Dulles Intl lean towards being more expensive in December. Prices are generally better when you fly from Billings to Washington Dulles Intl in February, with the cheapest ticket starting at $119.
A simple way to save on the total cost of your ticket is to fly from Billings to Washington Dulles Intl in the evening. If you’re flexible enough to do this you can expect to save up to 43% on your trip compared to booking a flight in the morning.