DEN

$105 Find Cheap Flights from Washington to Denver - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Denver departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Washington to Denver

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington to Denver

Mon, Sep 14 - Fri, Sep 18
Frontier Logo
7:00 pm - 3:52 am
SEA
-
DEN
7h 52m
1 stop
Frontier Logo
7:45 am - 9:51 am
DEN
-
SEA
3h 06mnonstop
$183Frontier
Tue, Aug 18 - Sat, Aug 22
Frontier Logo
7:06 pm - 10:58 pm
SEA
-
DEN
2h 52mnonstop
Frontier Logo
7:15 am - 9:19 am
DEN
-
SEA
3h 04mnonstop
$184Frontier
Tue, Aug 18 - Tue, Aug 25
Frontier Logo
7:06 pm - 10:58 pm
SEA
-
DEN
2h 52mnonstop
Frontier Logo
11:05 am - 1:22 pm
DEN
-
SEA
3h 17mnonstop
$185Frontier
Thu, Oct 22 - Tue, Oct 27
Frontier Logo
7:41 pm - 11:34 pm
SEA
-
DEN
2h 53mnonstop
Frontier Logo
7:45 am - 9:51 am
DEN
-
SEA
3h 06mnonstop
$186Frontier
Sun, Sep 20 - Thu, Sep 24
Multiple Airlines Logo
3:22 pm - 6:58 pm
PDX
-
DEN
2h 36mnonstop
Multiple Airlines Logo
1:43 pm - 6:37 pm
DEN
-
PDX
5h 54m
1 stop
$213Multiple Airlines
Wed, Aug 12 - Tue, Aug 18
Alaska Airlines Logo
6:04 pm - 11:59 pm
PSC
-
DEN
4h 55m
1 stop
Alaska Airlines Logo
8:00 am - 3:22 pm
DEN
-
PSC
8h 22m
1 stop
$249Alaska Airlines
Sun, Aug 9 - Thu, Aug 13
Multiple Airlines Logo
1:28 pm - 3:50 am
BLI
-
DEN
13h 22m
1 stop
Multiple Airlines Logo
7:03 pm - 9:07 am
DEN
-
BLI
15h 04m
1 stop
$250Multiple Airlines
Sat, Dec 12 - Wed, Dec 16
Alaska Airlines Logo
5:06 am - 10:39 am
GEG
-
DEN
4h 33m
1 stop
Alaska Airlines Logo
8:20 am - 11:47 pm
DEN
-
GEG
16h 27m
1 stop
$285Alaska Airlines
Fri, Sep 18 - Mon, Sep 21
Delta Logo
3:25 pm - 11:47 pm
PSC
-
DEN
7h 22m
1 stop
Delta Logo
6:35 pm - 11:54 pm
DEN
-
PSC
6h 19m
1 stop
$289Delta
Fri, Aug 28 - Sun, Aug 30
American Airlines Logo
3:28 pm - 9:42 pm
PSC
-
DEN
5h 14m
1 stop
American Airlines Logo
8:29 am - 2:48 pm
DEN
-
PSC
7h 19m
1 stop
$309American Airlines
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Good to know

Low seasonApril
Cheapest flight$105
Most popular time to fly with an average 6% increase in price.
Flight from Seattle to Denver

Flights from Washington to Denver: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Washington to Denver 
Learn how KAYAK collects reviews and tips from users.
DebraFlew with Alaska Airlines
SEA
-
DEN
Feb 2026
Seattle TSA much improved. Faster service. Baggage check-in ok. I'm sure will get faster as people get used to it.
Verified travelerFlew with Alaska Airlines
SEA
-
DEN
Mar 2025
Alaska Air is very efficient & on-time so allow enough time to get luggage, go thru Customs & Immigration, & long security lines. Terminals in SEA are readily accessible by trains but more signage is needed. Fortunately, Information booths are everywhere & are manned by very helpful staff.
MichaelFlew with Delta
SEA
-
DEN
Apr 2025
Train from Denver airport to downtown is easy to use.
Verified travelerFlew with Alaska Airlines
SEA
-
DEN
May 2024
When flying from Seattle to Denver, be ready to take our any electronics and put them in separate bins when going through security. You will also most likely have to take off your jacket as well. During our flight back the flight randomly changed so be on the lookout in case that happens to you! It was by chance that I checked my ticket and saw that the gate changed last minute.
Verified travelerFlew with United Airlines
GEG
-
DEN
Apr 2024
Time to switch planes should be more than 60 minutes.
Verified travelerFlew with United Airlines
PSC
-
DEN
Feb 2024
TSA doesn't open til 1030 so getting to the airport early isn't helpful

FAQs for booking flights from Washington to Denver

  • How does KAYAK find such low prices on flights from Washington to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Washington with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Westminster
Lakewood
Dillon
Broomfield
Englewood
Greenwood Village
Lone Tree
Central City
Limon
Brighton
Wheat Ridge
Fort Morgan
Evergreen
Erie

Everything you need to know for your flight to Denver

Information on the airport you'll fly into in Denver

Denver (DEN)