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.

$91 CHEAP FLIGHTS from Washington to Denver

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Cheap Flights from Washington to Denver

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Washington to Denver

Wed, Sep 30 - Wed, Oct 7

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

9:07 am - 6:10 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

10h 03m2 stops Salt Lake City Los Angeles

$135Frontier

Tue, Sep 15 - Wed, Sep 16

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

9:07 am - 6:10 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

10h 03m2 stops Salt Lake City Los Angeles

$135Frontier

Wed, Sep 9 - Thu, Sep 24

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

5:41 pm - 7:41 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$135Multiple Airlines

Wed, Sep 9 - Thu, Sep 17

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

5:41 pm - 7:41 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$139Multiple Airlines

Sat, Jan 23 - Sat, Jan 30

7:40 pm - 11:28 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 48mnonstop

12:20 pm - 2:31 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 11mnonstop

$171Delta

Sat, Jan 23 - Wed, Jan 27

1:50 pm - 5:35 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 45mnonstop

6:30 pm - 8:41 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 11mnonstop

$171Delta

Tue, Sep 29 - Tue, Oct 6

6:15 pm - 10:05 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 50mnonstop

8:40 pm - 10:40 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$171Southwest

Wed, Sep 23 - Sat, Sep 26

6:15 pm - 10:05 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 50mnonstop

4:20 pm - 6:20 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$171Southwest

Wed, Oct 14 - Sat, Oct 17

6:05 pm - 9:49 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 44mnonstop

7:14 pm - 9:15 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

$171United Airlines

Tue, Sep 29 - Tue, Oct 6

8:30 am - 12:22 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 52mnonstop

8:02 am - 10:01 amDEN Denver Intl-SEA Seattle/Tacoma Intl

2h 59mnonstop

$171United Airlines

Recent last minute flight deals from Washington to Denver

Mon, Aug 17 - Wed, Sep 16

12:19 pm - 9:24 amSEA Seattle/Tacoma Intl-DEN Denver Intl

20h 05m1 stop Ontario

1:07 pm - 3:08 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

$208Frontier

Mon, Aug 17 - Wed, Sep 16

2:22 pm - 6:18 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 56mnonstop

1:07 pm - 3:08 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

$237Frontier

Sat, Aug 15 - Mon, Aug 17

7:00 pm - 10:45 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 45mnonstop

6:02 am - 8:05 amDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 03mnonstop

$311Alaska Airlines

Sat, Aug 15 - Mon, Aug 17

8:13 pm - 3:50 amSEA Seattle/Tacoma Intl-DEN Denver Intl

6h 37m1 stop Las Vegas Harry Reid Intl

6:02 am - 8:05 amDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 03mnonstop

$357Multiple Airlines

Sat, Aug 15 - Mon, Aug 17

7:00 pm - 10:45 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 45mnonstop

6:02 am - 8:05 amDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 03mnonstop

$361Alaska Airlines

Fri, Aug 14 - Sat, Aug 15

7:06 pm - 10:58 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 52mnonstop

12:55 pm - 2:53 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

2h 58mnonstop

$373Multiple Airlines

Sat, Aug 15 - Sat, Aug 22

3:24 pm - 11:58 pmPSC Pasco Tri Cities-DEN Denver Intl

7h 34m1 stop Seattle/Tacoma Intl

6:43 pm - 11:59 pmDEN Denver Intl-PSC Pasco Tri Cities

6h 16m1 stop Seattle/Tacoma Intl

$374Delta

Mon, Aug 17 - Wed, Sep 16

11:50 am - 6:45 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

5h 55m1 stop San Jose

2:40 pm - 9:15 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

7h 35m2 stops Albuquerque Phoenix Sky Harbor Intl

$405Southwest

Mon, Aug 17 - Wed, Sep 16

3:25 pm - 11:45 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

7h 20m2 stops Sacramento Intl Las Vegas Harry Reid Intl

12:50 pm - 8:20 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

8h 30m2 stops Phoenix Sky Harbor Intl Oakland

$410Southwest

Mon, Aug 17 - Wed, Aug 19

8:07 pm - 11:58 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 51mnonstop

6:43 pm - 8:45 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 02mnonstop

$454Delta

Recent direct flight deals from Washington to Denver

Wed, Sep 9 - Thu, Sep 24

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

5:41 pm - 7:41 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$135Multiple Airlines

Sat, Oct 10 - Wed, Oct 14

7:41 pm - 11:34 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 53mnonstop

7:45 am - 9:51 amDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 06mnonstop

$136Frontier

Sat, Oct 10 - Tue, Oct 13

7:41 pm - 11:34 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 53mnonstop

7:45 am - 9:51 amDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 06mnonstop

$136Frontier

Wed, Sep 9 - Thu, Sep 17

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

5:41 pm - 7:41 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$139Multiple Airlines

Sat, Jan 23 - Sat, Jan 30

7:40 pm - 11:28 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 48mnonstop

12:20 pm - 2:31 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 11mnonstop

$171Delta

Sat, Jan 23 - Wed, Jan 27

1:50 pm - 5:35 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 45mnonstop

6:30 pm - 8:41 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 11mnonstop

$171Delta

Tue, Sep 29 - Tue, Oct 6

6:15 pm - 10:05 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 50mnonstop

8:40 pm - 10:40 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$171Southwest

Wed, Sep 23 - Sat, Sep 26

6:15 pm - 10:05 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 50mnonstop

4:20 pm - 6:20 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

$171Southwest

Wed, Oct 14 - Sat, Oct 17

6:05 pm - 9:49 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 44mnonstop

7:14 pm - 9:15 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

$171United Airlines

Tue, Sep 29 - Tue, Oct 6

8:30 am - 12:22 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 52mnonstop

8:02 am - 10:01 amDEN Denver Intl-SEA Seattle/Tacoma Intl

2h 59mnonstop

$171United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$91

Best time to beat the crowds with an average 18% drop in price.

Most popular time to fly with an average 25% increase in price.

Flight from Seattle to Denver

DebraFlew with Alaska Airlines-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-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-Apr 2025

Train from Denver airport to downtown is easy to use.

Verified travelerFlew with Alaska Airlines-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-Apr 2024

Time to switch planes should be more than 60 minutes.

Verified travelerFlew with United Airlines-Feb 2024

TSA doesn't open til 1030 so getting to the airport early isn't helpful

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.

Westminster

Lakewood

Dillon

Broomfield

Englewood

Greenwood Village

Lone Tree

Central City

Limon

Brighton

Fort Morgan

Wheat Ridge

Evergreen

Erie

Everything you need to know for your flight to Denver

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Information on the airport you'll fly into in Denver

Denver (DEN)

DEN

$91 Find Cheap Flights from Washington to Denver - Compare and Save

Cheap Flights from Washington to Denver

Recent round-trip flight deals from Washington to Denver

Recent one-way flight deals from Washington to Denver

Recent last minute flight deals from Washington to Denver

Recent direct flight deals from Washington to Denver

Good to know

Low season

High season

Cheapest flight

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

FAQs for booking flights from Washington to Denver

Traveling to a place near Denver?

Everything you need to know for your flight to Denver

Information on the airport you'll fly into in Denver

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Complete your trip to Denver with a hotel stay or car rental

Find direct flights for Denver

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Flights from domestic origins to Denver

Choose which airport to fly into in Denver

Find deals for your return flight