DEN

$93 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 9/28. 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

Wed, Aug 26 - Wed, Sep 2
Frontier Logo
2:37 pm - 6:33 pm
SEA
-
DEN
2h 56mnonstop
Frontier Logo
8:45 am - 7:33 pm
DEN
-
SEA
11h 48m
1 stop
$139Frontier
Sat, Sep 26 - Wed, Sep 30
Frontier Logo
4:27 pm - 8:21 pm
SEA
-
DEN
2h 54mnonstop
Frontier Logo
1:07 pm - 3:08 pm
DEN
-
SEA
3h 01mnonstop
$139Frontier
Fri, Aug 21 - Sun, Aug 23
Multiple Airlines Logo
7:29 pm - 11:16 pm
SEA
-
DEN
2h 47mnonstop
Multiple Airlines Logo
7:15 am - 9:19 am
DEN
-
SEA
3h 04mnonstop
$143Multiple Airlines
Mon, Aug 17 - Mon, Aug 24
Multiple Airlines Logo
8:11 pm - 11:59 pm
SEA
-
DEN
2h 48mnonstop
Multiple Airlines Logo
7:15 am - 9:19 am
DEN
-
SEA
3h 04mnonstop
$143Multiple Airlines
Sat, Aug 29 - Sat, Aug 29
Delta Logo
9:30 am - 1:11 pm
SEA
-
DEN
2h 41mnonstop
Delta Logo
6:43 pm - 8:45 pm
DEN
-
SEA
3h 02mnonstop
$197Delta
Thu, Aug 20 - Sun, Aug 23
Delta Logo
8:07 pm - 11:58 pm
SEA
-
DEN
2h 51mnonstop
Delta Logo
6:20 am - 8:19 am
DEN
-
SEA
2h 59mnonstop
$197Delta
Sun, Aug 23 - Sun, Aug 30
United Airlines Logo
5:00 am - 8:45 am
SEA
-
DEN
2h 45mnonstop
United Airlines Logo
8:02 am - 10:01 am
DEN
-
SEA
2h 59mnonstop
$197United Airlines
Fri, Aug 21 - Sun, Aug 23
United Airlines Logo
5:00 am - 8:45 am
SEA
-
DEN
2h 45mnonstop
United Airlines Logo
9:03 pm - 11:04 pm
DEN
-
SEA
3h 01mnonstop
$197United Airlines
Sat, Aug 29 - Sun, Aug 30
Alaska Airlines Logo
2:51 pm - 6:32 pm
PDX
-
DEN
2h 41mnonstop
Alaska Airlines Logo
8:08 am - 9:50 am
DEN
-
PDX
2h 42mnonstop
$201Alaska Airlines
Wed, Sep 9 - Wed, Sep 16
Alaska Airlines Logo
7:03 am - 10:52 am
PDX
-
DEN
2h 49mnonstop
Alaska Airlines Logo
8:08 am - 9:50 am
DEN
-
PDX
2h 42mnonstop
$207Alaska Airlines
Useful Info

Good to know

Low season

April

Cheapest flight

$93
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from Bellingham 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)