The cheapest flights we could find in 3/2 on United Airlines from DEN to SEA are:
How many flights does United Airlines fly from DEN to SEA?
United Airlines flies 676 flights every month between DEN and SEA.
What aircraft type does United Airlines fly to DEN and SEA?
United Airlines typically flies the Boeing 737-800 out of DEN and returns on a Boeing 737-800 from SEA.
*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 02/21/2018 and may change as you get closer to the actual flight date. Deals displayed whose dates are in the past are no longer valid.