Frontier Airlines Seattle to Denver Flights

Return flight: Denver – Seattle

Cheapflightsplus.com will find cheap Frontier Airlines flights from Seattle to Denver. Compare airline ticket prices and book air tickets starting from $33 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of Frontier Airlines, arrivals and departure details below.

Find Cheap Airfare Seattle (WA) — Denver (CO) by Frontier 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 - $33, two-way – $57.
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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
10:08 pm — 1:51 am
+1 day
10:08 pm — 1:51 am F91176 Frontier Airlines
Seattle — Denver
2h 43m
Find flight
from$33
8:18 am — 12:01 pm
8:18 am — 12:01 pm F93406 Frontier Airlines
Seattle — Denver
2h 43m
Find flight
from$33
10:36 am — 8:01 am
+1 day
9:57 am — 1:05 pm F94988 Frontier Airlines
Seattle — Salt Lake City
16h 38m stop
6:15 am — 7:52 am F93862 Frontier Airlines
Salt Lake City — Denver
20h 25m
including layover
Find flight
from$83
11:36 am — 3:59 am
+1 day
11:36 am — 2:11 pm F94204 Frontier Airlines
Seattle — Las Vegas
10h 48m stop
0:59 am — 3:59 am F92430 Frontier Airlines
Las Vegas — Denver
15h 23m
including layover
Find flight
from$84
11:36 am — 11:19 am
+1 day
11:36 am — 2:11 pm F94204 Frontier Airlines
Seattle — Las Vegas
18h 7m stop
8:18 am — 11:19 am F92016 Frontier Airlines
Las Vegas — Denver
22h 43m
including layover
Find flight
from$205
12:07 pm — 6:40 pm
2:55 pm — 5:32 pm F94830 Frontier Airlines
Seattle — Las Vegas
53m stop
0:59 am — 3:59 am F92430 Frontier Airlines
Las Vegas — Denver
5h 33m
including layover
Find flight
from$71
12:29 pm — 7:26 pm
12:29 pm — 3:08 pm F93163 Frontier Airlines
Seattle — Ontario
1h stop
4:08 pm — 7:26 pm F92908 Frontier Airlines
Ontario — Denver
5h 57m
including layover
Find flight
from$64
1:40 pm — 0:49 am
+1 day
1:40 pm — 4:20 pm F94830 Frontier Airlines
Seattle — Las Vegas
5h 33m stop
9:53 pm — 0:49 am F93950 Frontier Airlines
Las Vegas — Denver
10h 9m
including layover
Find flight
from$175
2:55 pm — 11:36 pm
2:55 pm — 5:32 pm F94830 Frontier Airlines
Seattle — Las Vegas
3h 1m stop
8:33 pm — 11:36 pm F94612 Frontier Airlines
Las Vegas — Denver
7h 41m
including layover
Find flight
from$336
4:35 pm — 11:33 pm
7:28 pm — 10:08 pm F93163 Frontier Airlines
Seattle — Ontario
1h stop
6:30 am — 9:54 am F91500 Frontier Airlines
Ontario — Denver
5h 58m
including layover
Find flight
from$72
4:58 pm — 11:44 pm
4:58 pm — 8:50 pm F93974 Frontier Airlines
Seattle — Phoenix
1h stop
9:50 pm — 11:44 pm F92142 Frontier Airlines
Phoenix — Denver
5h 46m
including layover
Find flight
from$64
5:21 pm — 7:53 am
+1 day
5:21 pm — 11:31 pm F94066 Frontier Airlines
Seattle — Dallas
7h 2m stop
6:33 am — 7:53 am F93365 Frontier Airlines
Dallas — Denver
13h 32m
including layover
Find flight
from$96
5:46 pm — 7:26 am
+1 day
5:46 pm — 11:39 pm F94066 Frontier Airlines
Seattle — Dallas
6h 36m stop
6:15 am — 7:26 am F91323 Frontier Airlines
Dallas — Denver
12h 40m
including layover
Find flight
from$98
7:51 pm — 12:09 pm
+1 day
2:55 pm — 5:32 pm F94830 Frontier Airlines
Seattle — Las Vegas
10h 26m stop
8:18 am — 11:19 am F92016 Frontier Airlines
Las Vegas — Denver
15h 18m
including layover
Find flight
from$65
7:51 pm — 2:31 pm
+1 day
2:55 pm — 5:32 pm F94830 Frontier Airlines
Seattle — Las Vegas
12h 41m stop
11:00 am — 2:06 pm F92350 Frontier Airlines
Las Vegas — Denver
17h 40m
including layover
Find flight
from$96
9:52 pm — 10:03 am
+1 day
9:52 pm — 1:44 am F93974 Frontier Airlines
Seattle — Phoenix
6h 21m stop
8:15 am — 10:11 am F94768 Frontier Airlines
Phoenix — Denver
11h 11m
including layover
Find flight
from$76
9:52 pm — 7:51 am
+1 day
9:52 pm — 1:44 am F93974 Frontier Airlines
Seattle — Phoenix
4h 16m stop
6:00 am — 7:51 am F91376 Frontier Airlines
Phoenix — Denver
8h 59m
including layover
Find flight
from$76
*Departure and arrival times are local. Last updated on 04/03/2025

Flight Information

There are 2 flights by Frontier 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 10:08 pm to 9:57 am. Nonstop flight is 2h 43m. The time difference between Seattle and Denver is 1h.

  • The fastest flight 2h 43m
  • Average flight time 2h 43m
  • The earliest flight 10:08 pm
  • The latest flight 9:57 am
  • Distance 1022 ml

The cheapest months for traveling to Denver are november (from 33 $), december (from 64 $), february (from 67 $).

The most expensive and popular months are january (from 72 $), february (from 67 $), december (from 64 $).

The cheapest flight by Frontier Airlines that our users were able to find is $33. This airfare is economy class on one-way F91176 flight for February 21, 2025 leaving Seattle-Tacoma Intl in Seattle at 10:08 pm, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides Frontier 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 $183
    Find
  • from $128
    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.

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