Nonstop from Seattle-Tacoma International to Denver International: distance, flying time, which airlines fly it and how often.
Distance
1,022 mi, great circle
Flying time
typical, gate to gate
Flights a day
average, November 2026
Airlines
passenger airlines
Also in the data (cargo, charter or a foreign airline on a domestic route): ATI.
The shortest path over the Earth's surface. Actual tracks vary with winds and airspace. Map © OpenStreetMap contributors.
Fares found in recent searches load here. You can also compare SEA to DEN fares by month.
Alaska cruise flights compared: SEA, YVR or ANC, why Anchorage cruises really leave from Whittier or Seward, and how the PVSA rule shapes routes.
The closest airport to Seattle cruise terminals is SEA, about 15 miles from Pier 91 and 14 from Pier 66. Compare transfers, costs and timing.
About 2h 38m gate to gate for the 1,645 km (1,022 mile) trip, estimated from distance. Schedules vary by airline and season, and winds can add or save time.
Alaska Airlines, Delta Air Lines, Frontier Airlines, Southwest Airlines and United Airlines, with about 19 flights a day between them in our data (AeroDataBox, November 2026).