Frontier Airlines Denver to Seattle Flights

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Cheapflightsplus.com will find cheap Frontier Airlines flights from Denver to Seattle. Compare airline ticket prices and book air tickets starting from $111 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 Denver (CO) — Seattle (WA) 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 may: one-way - $111, two-way – $190.

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Cheap Flights from Denver to Seattle by Frontier Airlines

Look at the list of plane tickets for the most popular direct and connecting flights by Frontier Airlines, their prices start from $111. The fastest nonstop flight takes 3h 7m. The fastest connecting flight — 6h 12m.

Price	Departure	Arrival	Flight Time	Airline	Flight
from $172 Find flight	4:08 pm Denver Denver International	6:15 pm Seattle Seattle-Tacoma Intl	3h 7m	Frontier Airlines	F91175
from $172 Find flight	10:29 pm Denver Denver International	0:37 am+1 день Seattle Seattle-Tacoma Intl	3h 8m	Frontier Airlines	F93405
from $111 Find flight	7:51 am Denver Denver International	1:03 pm Seattle Seattle-Tacoma Intl	6h 12m layover 0h 48m - Ontario	Frontier Airlines	F91261 F93164
from $116 Find flight	10:29 pm Denver Denver International	1:03 pm+1 день Seattle Seattle-Tacoma Intl	15h 34m layover 10h 12m - Ontario	Frontier Airlines	F91499 F93164
from $157 Find flight	10:39 pm Denver Denver International	9:59 am+1 день Seattle Seattle-Tacoma Intl	12h 20m layover 7h 2m - Phoenix	Frontier Airlines	F94753 F93973
from $256 Find flight	7:00 am Denver Denver International	2:16 pm Seattle Seattle-Tacoma Intl	8h 16m layover 3h 18m - Las Vegas	Frontier Airlines	F92015 F92407
from $261 Find flight	7:51 pm Denver Denver International	8:19 am+1 день Seattle Seattle-Tacoma Intl	13h 28m layover 6h 47m - Dallas	Frontier Airlines	F92632 F94065
from $289 Find flight	10:29 pm Denver Denver International	2:16 pm+1 день Seattle Seattle-Tacoma Intl	16h 47m layover 11h 43m - Las Vegas	Frontier Airlines	F9777 F92407
from $289 Find flight	5:46 pm Denver Denver International	2:16 pm+1 день Seattle Seattle-Tacoma Intl	21h 30m layover 16h 24m - Las Vegas	Frontier Airlines	F94967 F92407
from $289 Find flight	1:33 pm Denver Denver International	2:16 pm+1 день Seattle Seattle-Tacoma Intl	25h 43m layover 20h 40m - Las Vegas	Frontier Airlines	F92349 F92407
from $289 Find flight	8:24 pm Denver Denver International	2:16 pm+1 день Seattle Seattle-Tacoma Intl	18h 52m layover 13h 55m - Las Vegas	Frontier Airlines	F94611 F92407

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*Departure and arrival times are local. Prices are for one-way flights. Information refreshed on 05/15/2025

Frontier Airlines Flight Schedule Denver to Seattle

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	Flight Details	Flight Time	Price
10:29 pm — 1:03 pm +1 day	10:29 pm — 11:51 pm F91499 Frontier Airlines Denver — Ontario 10h 12m stop 10:03 am — 1:03 pm F93164 Frontier Airlines Ontario — Seattle	15h 34m including layover	Find flight from$116
10:29 pm — 0:37 am +1 day	10:29 pm — 0:37 am F93405 Frontier Airlines Denver — Seattle	3h 8m	Find flight from$172
10:29 pm — 2:16 pm +1 day	10:29 pm — 11:36 pm F9777 Frontier Airlines Denver — Las Vegas 11h 43m stop 11:19 am — 2:16 pm F92407 Frontier Airlines Las Vegas — Seattle	16h 47m including layover	Find flight from$289
10:39 pm — 9:59 am +1 day	10:39 pm — 11:41 pm F94753 Frontier Airlines Denver — Phoenix 7h 2m stop 6:43 am — 9:59 am F93973 Frontier Airlines Phoenix — Seattle	12h 20m including layover	Find flight from$157
1:33 pm — 2:16 pm +1 day	1:33 pm — 2:39 pm F92349 Frontier Airlines Denver — Las Vegas 20h 40m stop 11:19 am — 2:16 pm F92407 Frontier Airlines Las Vegas — Seattle	25h 43m including layover	Find flight from$289
4:08 pm — 6:15 pm	4:08 pm — 6:15 pm F91175 Frontier Airlines Denver — Seattle	3h 7m	Find flight from$172
5:46 pm — 2:16 pm +1 day	5:46 pm — 6:55 pm F94967 Frontier Airlines Denver — Las Vegas 16h 24m stop 11:19 am — 2:16 pm F92407 Frontier Airlines Las Vegas — Seattle	21h 30m including layover	Find flight from$289
7:00 am — 2:16 pm	6:00 am — 7:09 am F92015 Frontier Airlines Denver — Las Vegas 3h 18m stop 3:44 pm — 6:38 pm F92407 Frontier Airlines Las Vegas — Seattle	8h 16m including layover	Find flight from$256
7:51 am — 1:03 pm	8:20 am — 9:46 am F91261 Frontier Airlines Denver — Ontario 48m stop 7:58 am — 10:54 am F93164 Frontier Airlines Ontario — Seattle	6h 12m including layover	Find flight from$111
7:51 pm — 8:19 am +1 day	7:51 pm — 11:13 pm F92632 Frontier Airlines Denver — Dallas 6h 47m stop 6:00 am — 8:19 am F94065 Frontier Airlines Dallas — Seattle	13h 28m including layover	Find flight from$261
8:24 pm — 2:16 pm +1 day	8:24 pm — 9:24 pm F94611 Frontier Airlines Denver — Las Vegas 13h 55m stop 11:19 am — 2:16 pm F92407 Frontier Airlines Las Vegas — Seattle	18h 52m including layover	Find flight from$289

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times are local. Last updated on 05/15/2025

Flight Information

There are 2 flights by Frontier Airlines from Denver to Seattle every week with departures from Denver International and Arapahoe Co. All flights arrive at Seattle-Tacoma Intl, Boeing Field International Airport, Kenmore Air Harbor SPB.

Departures start from 10:29 pm to 8:24 pm. Nonstop flight is 3h 7m. The time difference between Denver and Seattle is 1h.

The fastest flight 3h 7m
Average flight time 3h 8m
The earliest flight 10:29 pm
The latest flight 8:24 pm
Distance 1022 ml

The cheapest months for traveling to Seattle are november (from 67 $), may (from 67 $), december (from 70 $).

The most expensive and popular months are february (from 300 $), january (from 98 $), december (from 70 $).

The cheapest flight by Frontier Airlines that our users were able to find is $111. This airfare is economy class on one-way F91261 flight for May 25, 2025 leaving Denver International in Denver at 7:51 am, it includes all taxes and additional fees.

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Frontier Airlines Airplanes on the Route

List of the most popular Frontier Airlines airplanes flying from Denver to Seattle:

Other Popular Airlines on the Route

Besides Frontier Airlines there are other 5 airline carriers between Denver and Seattle. Please review schedules and prices from the most popular airlines to find the best airfare deals from Denver to Seattle.

Nonstop flights

There are 17 direct flights every day from Denver. Airlines and fares are below:

UA - United Airlines

from $221

Find
AS - Alaska Airlines

from $169

Find
HA - Hawaiian Airlines

from $165

Find

See more direct flights

Connecting Flights

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

UA - United Airlines

from $157

Find
AS - Alaska Airlines

from $220

Find
SY - Sun Country Airlines

from $277

Find
HA - Hawaiian Airlines

from $210

Find
G4 - Allegiant Air

from $284

Find

See more connecting flights

How to book an air ticket yourself?

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