Cheap flights from Seattle, WA to Denver, CO

Flights starting at £42. Choose between United Airlines, Alaska Airlines, or Frontier Airlines to find the best price.

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Travelers usually depart from Seattle–Tacoma International, or Kenmore Air Harbor Seaplane Base when they travel from Seattle to Denver. The distance between Seattle and Denver is 1646 km. The most popular airlines for this route are United Airlines, Alaska Airlines, and Frontier Airlines. Seattle and Denver have 104 direct flights per week.

Weekly direct flights

Discover the top airlines offering direct flights from Seattle to Denver in the next month. You’ll find the number of daily direct flights per airline in the table.

Weekly direct flights for Mon 27.05 - Sun 02.06

AirlineMon 27.05Tue 28.05Wed 29.05Thu 30.05Fri 31.05Sat 01.06Sun 02.06
---------5---------
2227632
2112222

Weekly direct flights for Mon 03.06 - Sun 09.06

AirlineMon 03.06Tue 04.06Wed 05.06Thu 06.06Fri 07.06Sat 08.06Sun 09.06
---------5452
5756321
2122222

Weekly direct flights for Mon 10.06 - Sun 16.06

AirlineMon 10.06Tue 11.06Wed 12.06Thu 13.06Fri 14.06Sat 15.06Sun 16.06
2343363
1661---11
2222222

Weekly direct flights for Mon 17.06 - Sun 23.06

AirlineMon 17.06Tue 18.06Wed 19.06Thu 20.06Fri 21.06Sat 22.06Sun 23.06
6626344
11---1---------
2222222

Check-in for a flight from Seattle to Denver

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
United AirlinesUALUAYesNo
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight

Denver travel tips

1) Buy a Citypass in Denver to save some money
2) Sport fans must attend a baseball match in Denver
3) Do not hesitate to ask if ice skating is free in winter in Denver

Weather in Denver

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January4°C-6°C
February4°C-6°C
March10°C-2°C
April14°C1°C
May18°C6°C
June26°C12°C
July29°C16°C
August28°C15°C
September25°C11°C
October17°C4°C
November10°C-1°C
December4°C-6°C
Hottest Month
29°C
July
Coldest month
-6°C
January
Sunny days
260
days per year
Snow days
28
days per year

14 day forecast

Monday
27 May
26°C12°C
3 Jun
71%
21°C12°C
Tuesday
28 May
89%
27°C13°C
4 Jun
24°C10°C
Wednesday
29 May
85%
30°C13°C
5 Jun
28°C15°C
Thursday
30 May
89%
27°C13°C
6 Jun
34°C16°C
Friday
31 May
28°C11°C
7 Jun
87%
27°C15°C
Saturday
1 Jun
29°C16°C
8 Jun
80%
21°C14°C
Sunday
2 Jun
31°C15°C
9 Jun
23°C13°C

Frequently asked questions

How long does it take to travel from Seattle to Denver?
What is the flight distance between Seattle and Denver?
What airlines offer nonstop (direct) flights between Seattle and Denver?
What are the most popular routes to and from Seattle?
What are the most popular routes to and from Denver?
Which airports are there in Seattle?
What airports are near Seattle?
What airports are near Denver?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Seattle and Denver?
What is Virtual Interlining and how do I use it?
Which airlines fly between Seattle and Denver?
When's the best time to travel between Seattle and Denver?
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How many airports are there near Seattle?
How many airports are there near Denver?
What time do nonstop (direct) flights between Seattle and Denver depart?
What time do nonstop (direct) flights between Seattle and Denver arrive?
What time do flights between Seattle and Denver depart?
What time do flights between Seattle and Denver arrive?

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