The cheapest flights we could find in 5/1 on United Airlines from DEN to IAD are:
How many flights does United Airlines fly from DEN to IAD?
United Airlines flies 1,218 flights every month between DEN and IAD.
What aircraft type does United Airlines fly to DEN and IAD?
United Airlines typically flies the Boeing 737-800 out of DEN and returns on a Boeing 737-900 from IAD.
*Prices vary and will be updated when you view current flight availability results. Deals displayed here are based on flight pricing and availability as of 04/20/2018 and may change as you get closer to the actual flight date. Deals displayed whose dates are in the past are no longer valid.