To save up to 33% on this flight, we recommend booking at least 43 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Washington Dulles Intl Airport to Sioux Falls from $379 1-2 weeks out and tickets from $477 for flights departing within the next 72 hours.
Our data shows that March tends to be the cheapest month to fly to Sioux Falls from Washington Dulles Intl Airport. Users have commonly found prices around $372 for the month, but tickets can be as low as $214. Due to multiple factors, prepare for potentially higher prices in December.
When flying from Washington Dulles Intl Airport to Sioux Falls, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.