When flying from Washington, D.C. Dulles Intl Airport to Helena, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
September is one of the best times of the year to fly to Helena from Washington, D.C. Dulles Intl Airport. Prices for September average $729 per person but you can even find prices for as low as $308. The most expensive prices can be found in the month of June. Opting for a September flight can save you 93% on your journey compared to booking in June