DEN

$100 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 9/13. 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

Thu, Aug 13 - Thu, Aug 20
Frontier Logo
7:06 pm - 10:58 pm
SEA
-
DEN
2h 52mnonstop
Frontier Logo
7:15 am - 9:19 am
DEN
-
SEA
3h 04mnonstop
$163Frontier
Fri, Aug 7 - Wed, Aug 12
Frontier Logo
7:06 pm - 10:58 pm
SEA
-
DEN
2h 52mnonstop
Frontier Logo
7:00 am - 9:04 am
DEN
-
SEA
3h 04mnonstop
$164Frontier
Sat, Aug 15 - Wed, Aug 19
Frontier Logo
7:06 pm - 10:58 pm
SEA
-
DEN
2h 52mnonstop
Frontier Logo
7:15 am - 9:19 am
DEN
-
SEA
3h 04mnonstop
$165Frontier
Thu, Aug 27 - Thu, Sep 17
Multiple Airlines Logo
5:58 pm - 9:46 pm
PDX
-
DEN
2h 48mnonstop
Multiple Airlines Logo
2:45 pm - 4:35 pm
DEN
-
PDX
2h 50mnonstop
$197Multiple Airlines
Tue, Sep 15 - Wed, Sep 23
Multiple Airlines Logo
3:22 pm - 6:58 pm
PDX
-
DEN
2h 36mnonstop
Multiple Airlines Logo
5:41 pm - 10:01 pm
DEN
-
PDX
5h 20m
1 stop
$202Multiple Airlines
Tue, Aug 4 - Mon, Aug 10
Alaska Airlines Logo
3:59 pm - 9:40 pm
PSC
-
DEN
4h 41m
1 stop
Alaska Airlines Logo
6:02 am - 9:53 am
DEN
-
PSC
4h 51m
1 stop
$249Alaska Airlines
Tue, Sep 22 - Wed, Sep 30
Alaska Airlines Logo
12:21 pm - 6:32 pm
PAE
-
DEN
5h 11m
1 stop
Alaska Airlines Logo
8:08 am - 11:41 am
DEN
-
PAE
4h 33m
1 stop
$257Alaska Airlines
Thu, Oct 1 - Sat, Oct 3
United Airlines Logo
1:38 pm - 4:58 pm
GEG
-
DEN
2h 20mnonstop
United Airlines Logo
11:15 am - 12:34 pm
DEN
-
GEG
2h 19mnonstop
$297United Airlines
Thu, Aug 27 - Mon, Aug 31
Southwest Logo
6:00 am - 1:50 pm
GEG
-
DEN
6h 50m
1 stop
Southwest Logo
8:40 pm - 10:00 pm
DEN
-
GEG
2h 20mnonstop
$307Southwest
Thu, Oct 1 - Mon, Oct 5
United Airlines Logo
1:38 pm - 4:58 pm
GEG
-
DEN
2h 20mnonstop
United Airlines Logo
7:25 pm - 8:49 pm
DEN
-
GEG
2h 24mnonstop
$310United Airlines
Useful Info

Good to know

Low season

January

Cheapest flight

$100
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Spokane 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
Lakewood
Westminster
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)