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CA $120 Cheap Flights from Seattle (SEA) to Denver (DEN)

View CA $120 flight on Sat, Sep 26, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Denver International Airport (DEN)

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Cheap flights from Seattle (SEA) to Denver (DEN)

Prices were available within the past 7 days and start at CA $120 for one-way flights and CA $239 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Sep 22 - Tue, Sep 29
SEA
Seattle
DEN
Denver
CA $239 Roundtrip, just found
CA $239
Roundtrip
just found
Select Delta flight, departing Tue, Sep 22 from Seattle to Denver, returning Tue, Sep 29, priced at CA $239 just found
Delta
Tue, Sep 22 - Tue, Sep 29
SEA
Seattle
DEN
Denver
CA $253 Roundtrip, just found
CA $253
Roundtrip
just found
Select Delta flight, departing Tue, Sep 22 from Seattle to Denver, returning Tue, Sep 29, priced at CA $253 just found
American Airlines
Thu, Oct 1 - Tue, Oct 6
SEA
Seattle
DEN
Denver
CA $254 Roundtrip, found 23 hours ago
CA $254
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Thu, Oct 1 from Seattle to Denver, returning Tue, Oct 6, priced at CA $254 found 23 hours ago
Delta
Tue, Oct 13 - Mon, Oct 19
SEA
Seattle
DEN
Denver
CA $261 Roundtrip, just found
CA $261
Roundtrip
just found
Select Delta flight, departing Tue, Oct 13 from Seattle to Denver, returning Mon, Oct 19, priced at CA $261 just found
Alaska Airlines
Tue, Sep 22 - Tue, Sep 29
SEA
Seattle
DEN
Denver
CA $262 Roundtrip, just found
CA $262
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Sep 22 from Seattle to Denver, returning Tue, Sep 29, priced at CA $262 just found
American Airlines
Wed, Oct 21 - Sat, Oct 24
SEA
Seattle
DEN
Denver
CA $266 Roundtrip, found 4 hours ago
CA $266
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Wed, Oct 21 from Seattle to Denver, returning Sat, Oct 24, priced at CA $266 found 4 hours ago
American Airlines
Thu, Oct 1 - Tue, Oct 6
SEA
Seattle
DEN
Denver
CA $268 Roundtrip, found 23 hours ago
CA $268
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Thu, Oct 1 from Seattle to Denver, returning Tue, Oct 6, priced at CA $268 found 23 hours ago
Delta
Wed, Oct 14 - Mon, Oct 19
SEA
Seattle
DEN
Denver
CA $274 Roundtrip, just found
CA $274
Roundtrip
just found
Select Delta flight, departing Wed, Oct 14 from Seattle to Denver, returning Mon, Oct 19, priced at CA $274 just found
United
Thu, Sep 3 - Mon, Sep 7
SEA
Seattle
DEN
Denver
CA $283 Roundtrip, found 1 hour ago
CA $283
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 3 from Seattle to Denver, returning Mon, Sep 7, priced at CA $283 found 1 hour ago
Southwest Airlines
Tue, Sep 22 - Tue, Sep 29
SEA
Seattle
DEN
Denver
CA $396 Roundtrip, just found
CA $396
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Sep 22 from Seattle to Denver, returning Tue, Sep 29, priced at CA $396 just found

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city centre is 32 minutes. Flights from CA $399
DEN
Denver Intl.
Cheapest
Average driving time to city centre32 min
Flights from CA $399

Find the cheapest month to fly from Seattle (SEA) to Denver (DEN)

September is typically the cheapest month to fly

From CA $78 - CA $195 per traveller.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) cost?
You can find cheap one-way flights from CA $120 and cheap return flights from CA $239 SEA to DEN with Expedia. One-way flights typically cost between CA$135 and CA$1004, and return flights often range between CA$349 and CA$1399. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when SEA to DEN ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA) to Denver, CO (DEN)?
The cheapest months to fly from Seattle, WA (SEA) to Denver, CO (DEN) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
You have a great selection of airlines offering direct flights from Seattle - Tacoma Intl. (SEA) to Denver, CO (DEN-Denver Intl.). There are 5 airlines that fly this non-stop route. Here are some of the top carriers:
  • United operates 69 direct flights from Seattle - Tacoma Intl. (SEA) to Denver, CO (DEN-Denver Intl.) every week.
  • Southwest Airlines operates 31 direct flights from Seattle - Tacoma Intl. (SEA) to Denver, CO (DEN-Denver Intl.) every week.
  • Delta operates 26 direct flights from Seattle - Tacoma Intl. (SEA) to Denver, CO (DEN-Denver Intl.) every week.
  • Frontier Airlines operates 13 direct flights from Seattle - Tacoma Intl. (SEA) to Denver, CO (DEN-Denver Intl.) every week.
  • American Airlines operates 7 direct flights from Seattle - Tacoma Intl. (SEA) to Denver, CO (DEN-Denver Intl.) every week.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
The best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
The best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) is typically January or October. These months offer the cheapest fares, with an average return flight costing around CA$277. While these aren't the most popular months for travel, you'll still find plenty of flight options available. If you're looking for a balance of good prices and a decent selection of flights, these months are a great choice.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
You'll find approximately 20 nonstop flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.). For even more choices, look at flights that include layovers, as there are around 124 connecting flights per day. Some common connection points include Sky Harbor Intl. (PHX), Harry Reid Intl. (LAS), and Sacramento Intl. (SMF).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
The earliest flight from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN) typically departs around 12:05 AM. This service is offered by American Airlines. This is a seasonal service, active in February and March. An early departure like this can be great for maximizing your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
You'll typically find the most flights from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN) on a Thursday, with around 97 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, Southwest Airlines, and United. Flight schedules are quite consistent throughout the week, with Thursday offering only slightly more options compared to other days.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN) are in the early morning, from 6am to 9am. Many major carriers, including Alaska Airlines, Southwest Airlines and Delta, offer flights during this window. Many travelers prefer these early morning flights as they allow you to arrive in Denver with plenty of time to start your day, whether for business or leisure.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
A direct flight from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN) typically takes around 2 hours 48 minutes, covering a distance of approximately 1,645 kilometers. If you opt for a one-stop flight, your travel time will be longer, usually around 8 hours 18 minutes. Flights with two or more stops will take even longer, averaging about 9 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
You can fly business class or first class between SEA and DEN. You can fly business class with Frontier Airlines and Delta.First class cabins are available on:
  • Alaska Airlines
  • United
  • Delta
  • American Airlines

How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Denver, CO (DEN) from Seattle, WA (SEA)?
If you're planning to travel to Denver from Seattle - Tacoma Intl. (SEA), you can fly directly into Denver Intl. (DEN). Some flights may connect through major hubs like Harry Reid International Airport (LAS), San Francisco Intl. (SFO), or Sky Harbor Intl. (PHX) before reaching Denver. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, United
Roundtrip price
CA $232
Distance
1635 km
Average flight time
3 hours 42 mins

Book with confidence

Seattle to Denver Flights

The easy way to book your flights from Seattle to Denver 

With Expedia, it’s simple to find and book flights to Denver from Seattle whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Denver Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Seattle to Denver today, tomorrow, or this week.  

 

Save dollars with cheap flights from Seattle - Tacoma Intl., SEA to Denver Intl., DEN 

Sort your search results by price to find great deals on your flight from Seattle to Denver—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Denver from Seattle currently is just CA $239 rising to CA $396.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Denver  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Denver from Seattle 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Denver with Expedia today.

Seattle to Denver Flights

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