Nonstop flights from Seattle to Denver

5 airlines fly this route, with up to 23 flights a day.

SEASeattle-Tacoma International

1,022 mi · 148 flights a week

DENDenver International

SEADEN

When they leave

Seattle time

5:00a8:11pFirst departure 5:00 AM, last 8:11 PM

10 in the morning, 5:00 AM to 11:44 AM, then 10 in the afternoon, 12:40 PM to 4:26 PM, then seven in the evening, 5:40 PM to 8:11 PM.

Every flight

Earliest first

5:00 AM→8:45 AMUnited AirlinesAirbus A321neoDaily
6:30 AM→10:05 AMSouthwest AirlinesBoeing 737-700Mon, Tue, Wed, Thu, Fri
7:14 AM→11:04 AMAlaska AirlinesBoeing 737Wed
8:04 AM→11:56 AMAlaska AirlinesBoeing 737Mon, Tue, Thu, Fri, Sat, Sun
8:40 AM→12:32 PMUnited AirlinesBoeing 737Daily
8:40 AM→12:26 PMDelta Air LinesAirbus A220-300Daily
8:55 AM→12:35 PMSouthwest AirlinesBoeing 737 MAX 8Sun
10:20 AM→2:10 PMSouthwest AirlinesBoeing 737-700Sat
10:45 AM→2:30 PMSouthwest AirlinesBoeing 737Mon, Tue, Wed, Thu, Fri
11:03 AM→2:54 PMUnited AirlinesBoeing 737Mon, Tue, Wed, Thu, Fri, Sun
11:44 AM→3:38 PMAlaska AirlinesBoeing 737Mon, Wed, Thu, Fri, Sat, Sun
11:44 AM→3:38 PMAlaska AirlinesBoeing 737Tue
12:40 PM→4:25 PMSouthwest AirlinesBoeing 737-700Sat
12:44 PM→4:35 PMUnited AirlinesAirbus A321neoDaily
12:48 PM→4:36 PMAlaska AirlinesBoeing 737 MAX 9Wed
1:33 PM→5:20 PMAlaska AirlinesBoeing 737 MAX 8Mon, Tue, Thu, Fri, Sat, Sun
1:55 PM→5:45 PMSouthwest AirlinesBoeing 737 MAX 8Mon, Tue, Wed, Thu, Fri
1:55 PM→5:45 PMSouthwest AirlinesBoeing 737Sun
1:55 PM→5:48 PMDelta Air LinesAirbus A220-300Daily
2:22 PM→6:18 PMFrontier AirlinesAirbus A320neoDaily
2:34 PM→6:25 PMUnited AirlinesAirbus A321neoMon, Wed, Thu, Fri, Sun
3:45 PM→7:30 PMSouthwest AirlinesBoeing 737-700Daily
3:54 PM→7:45 PMUnited AirlinesBoeing 737 MAX 8Daily
4:26 PM→8:10 PMAlaska AirlinesBoeing 737Daily
5:40 PM→9:25 PMSouthwest AirlinesBoeing 737Sat
6:15 PM→9:59 PMUnited AirlinesBoeing 737Wed, Thu, Fri, Sun
6:15 PM→10:00 PMSouthwest AirlinesBoeing 737Mon, Thu, Fri
6:45 PM→10:25 PMSouthwest AirlinesBoeing 737Sun
7:00 PM→10:45 PMAlaska AirlinesBoeing 737Daily
7:06 PM→10:58 PMFrontier AirlinesAirbus A321Daily
8:07 PM→11:58 PMDelta Air LinesAirbus A220-300Daily
8:11 PM→11:59 PMAlaska AirlinesBoeing 737Mon, Thu, Fri, Sun

Schedules last checked Sep 19, 2026. Times are local.

Flying from Seattle to Denver

United Airlines flies most often, 4 to 7 times a day on the Airbus A321neo, Boeing 737 and Boeing 737 MAX 8. Alaska Airlines flies 5 to 6 times a day on the Boeing 737, Boeing 737 MAX 8 and Boeing 737 MAX 9. Southwest Airlines flies 4 to 5 times a day on the Boeing 737, Boeing 737-700 and Boeing 737 MAX 8. Delta Air Lines flies 3 times a day on the Airbus A220-300. Frontier Airlines flies twice a day on the Airbus A320neo and Airbus A321.

Flights run every day of the week, from 18 on Saturdays to 23 on Thursdays and Fridays. The first arrival in Denver is at 8:45 AM and the last at 11:59 PM. The flight covers 1,022 miles.

Flying back, Denver to Seattle has 149 nonstop flights a week.

Return flights

Denver to SeattleView

Find the cheapest day to fly from Seattle to Denver.

Schedules as of Oct 9, 2026.