United Airlines Seattle to Denver Flights

Return flight: Denver – Seattle

Cheapflightsplus.com will find cheap United Airlines flights from Seattle to Denver. Compare airline ticket prices and book air tickets starting from $102 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of United Airlines, arrivals and departure details below.

Find Cheap Airfare Seattle (WA) — Denver (CO) by United Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in april: one-way - $102, two-way – $175.
Direct flights
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Below is a detailed 2025 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.
Departure Arrival Flight Details Flight Time Price
12:30 pm — 4:14 pm
12:30 pm — 4:14 pm UA431 United Airlines
Seattle — Denver
2h 44m
Find flight
from$190
12:35 pm — 4:17 pm
12:35 pm — 4:17 pm UA1483 United Airlines
Seattle — Denver
2h 42m
Find flight
from$141
12:46 pm — 4:31 pm
12:46 pm — 4:31 pm UA423 United Airlines
Seattle — Denver
2h 45m
Find flight
from$257
3:18 pm — 7:00 pm
3:18 pm — 7:00 pm UA757 United Airlines
Seattle — Denver
2h 42m
Find flight
from$141
3:20 pm — 7:04 pm
3:20 pm — 7:04 pm UA1476 United Airlines
Seattle — Denver
2h 44m
Find flight
from$117
5:02 am — 8:44 am
5:02 am — 8:44 am UA2269 United Airlines
Seattle — Denver
2h 42m
Find flight
from$102
6:00 pm — 9:44 pm
6:00 pm — 9:44 pm UA1279 United Airlines
Seattle — Denver
2h 44m
Find flight
from$129
7:11 pm — 10:55 pm
7:11 pm — 10:55 pm UA297 United Airlines
Seattle — Denver
2h 44m
Find flight
from$152
7:13 pm — 10:57 pm
7:13 pm — 10:57 pm UA1387 United Airlines
Seattle — Denver
2h 44m
Find flight
from$155
9:00 am — 12:43 pm
9:00 am — 12:43 pm UA1829 United Airlines
Seattle — Denver
2h 43m
Find flight
from$117
10:55 am — 9:29 pm
10:55 am — 4:59 pm UA747 United Airlines
Seattle — Chicago
2h 41m stop
7:40 pm — 9:29 pm UA2485 United Airlines
Chicago — Denver
9h 34m
including layover
Find flight
from$643
10:55 am — 8:09 pm
10:55 am — 4:59 pm UA747 United Airlines
Seattle — Chicago
1h 16m stop
6:15 pm — 8:09 pm UA1958 United Airlines
Chicago — Denver
8h 14m
including layover
Find flight
from$644
11:56 am — 10:47 pm
11:56 am — 2:13 pm UA2848 United Airlines
Seattle — San Francisco
4h 57m stop
7:10 pm — 10:47 pm UA589 United Airlines
San Francisco — Denver
9h 51m
including layover
Find flight
from$248
11:56 am — 8:44 am
+1 day
11:56 am — 2:13 pm UA2848 United Airlines
Seattle — San Francisco
14h 47m stop
5:00 am — 8:44 am UA1531 United Airlines
San Francisco — Denver
19h 48m
including layover
Find flight
from$248
12:55 pm — 7:40 pm
12:55 pm — 3:12 pm UA737 United Airlines
Seattle — San Francisco
48m stop
4:00 pm — 7:40 pm UA566 United Airlines
San Francisco — Denver
5h 45m
including layover
Find flight
from$128
12:55 pm — 10:17 pm
12:55 pm — 3:12 pm UA737 United Airlines
Seattle — San Francisco
3h 28m stop
6:40 pm — 10:17 pm UA373 United Airlines
San Francisco — Denver
8h 22m
including layover
Find flight
from$128
1:55 pm — 11:06 pm
1:55 pm — 4:12 pm UA1152 United Airlines
Seattle — San Francisco
3h 17m stop
7:29 pm — 11:06 pm UA589 United Airlines
San Francisco — Denver
8h 11m
including layover
Find flight
from$128
1:55 pm — 10:17 pm
1:55 pm — 4:12 pm UA1152 United Airlines
Seattle — San Francisco
2h 28m stop
6:40 pm — 10:17 pm UA373 United Airlines
San Francisco — Denver
7h 22m
including layover
Find flight
from$128
2:00 pm — 10:47 pm
2:00 pm — 4:17 pm UA375 United Airlines
Seattle — San Francisco
2h 53m stop
7:10 pm — 10:47 pm UA589 United Airlines
San Francisco — Denver
7h 47m
including layover
Find flight
from$152
2:00 pm — 9:52 pm
2:00 pm — 4:17 pm UA375 United Airlines
Seattle — San Francisco
1h 58m stop
6:15 pm — 9:52 pm UA297 United Airlines
San Francisco — Denver
6h 52m
including layover
Find flight
from$152
4:23 pm — 11:59 pm
4:23 pm — 6:40 pm UA737 United Airlines
Seattle — San Francisco
1h 42m stop
8:22 pm — 11:59 pm UA1230 United Airlines
San Francisco — Denver
6h 36m
including layover
Find flight
from$158
4:35 pm — 11:59 pm
4:20 pm — 6:37 pm UA1914 United Airlines
Seattle — San Francisco
1h 30m stop
8:22 pm — 11:59 pm UA1230 United Airlines
San Francisco — Denver
6h 24m
including layover
Find flight
from$162
5:36 am — 2:40 pm
5:36 am — 7:50 am UA1954 United Airlines
Seattle — San Francisco
3h 10m stop
11:00 am — 2:40 pm UA1986 United Airlines
San Francisco — Denver
8h 4m
including layover
Find flight
from$128
6:15 am — 10:10 pm
6:15 am — 9:02 am UA1571 United Airlines
Seattle — Los Angeles
9h 43m stop
6:45 pm — 10:10 pm UA2610 United Airlines
Los Angeles — Denver
14h 55m
including layover
Find flight
from$253
8:44 am — 6:05 pm
8:44 am — 11:01 am UA1777 United Airlines
Seattle — San Francisco
3h 24m stop
2:25 pm — 6:05 pm UA618 United Airlines
San Francisco — Denver
8h 21m
including layover
Find flight
from$128
8:44 am — 4:40 pm
8:44 am — 11:01 am UA1777 United Airlines
Seattle — San Francisco
1h 59m stop
1:00 pm — 4:40 pm UA1417 United Airlines
San Francisco — Denver
6h 56m
including layover
Find flight
from$128
9:41 am — 6:05 pm
9:41 am — 11:55 am UA1102 United Airlines
Seattle — San Francisco
2h 30m stop
2:25 pm — 6:05 pm UA618 United Airlines
San Francisco — Denver
7h 24m
including layover
Find flight
from$128
*Departure and arrival times are local. Last updated on 04/03/2025

Flight Information

There are 10 flights by United Airlines from Seattle to Denver every week with departures from Seattle-Tacoma Intl, Boeing Field International Airport, Kenmore Air Harbor SPB. All flights arrive at Denver International and Arapahoe Co.

Departures start from 10:55 am to 9:41 am. Nonstop flight is 2h 42m. The time difference between Seattle and Denver is 1h.

  • The fastest flight 2h 42m
  • Average flight time 2h 44m
  • The earliest flight 10:55 am
  • The latest flight 9:41 am
  • Distance 1022 ml

The cheapest months for traveling to Denver are december (from 102 $), november (from 117 $), january (from 129 $).

The most expensive and popular months are february (from 129 $), january (from 129 $), november (from 117 $).

The cheapest flight by United Airlines that our users were able to find is $102. This airfare is economy class on one-way UA2269 flight for February 21, 2025 leaving Seattle-Tacoma Intl in Seattle at 5:02 am, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides United Airlines there are other 8 airline carriers between Seattle and Denver. Please review schedules and prices from the most popular airlines to find the best airfare deals from Seattle to Denver.

Nonstop flights

There are 24 direct flights every day from Seattle. Airlines and fares are below:

See more direct flights

Connecting Flights

List of flights with layovers (1 and more stops):

  • from $64
    Find
  • from $183
    Find
  • AA - American Airlines
    from $136
    Find
  • AS - Alaska Airlines
    from $110
    Find
  • SY - Sun Country Airlines
    from $131
    Find
  • Y4 - Volaris
    from $441
    Find
  • AM - Aeromexico
    from $1059
    Find
  • NK - Spirit Airlines
    from $193
    Find
See more connecting flights

How to book an air ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected airfare.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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