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

View AU$110 flight on Sat, 13 June 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 for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$220 Return, found 6 days ago
AU$220
Return
found 6 days ago
Select Delta flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$220 found 6 days ago
Delta
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$234 Return, found 6 days ago
AU$234
Return
found 6 days ago
Select Delta flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$234 found 6 days ago
Delta
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$247 Return, found 6 days ago
AU$247
Return
found 6 days ago
Select Delta flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$247 found 6 days ago
Alaska Airlines
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$262 Return, found 6 days ago
AU$262
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$262 found 6 days ago
Alaska Airlines
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$271 Return, found 6 days ago
AU$271
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$271 found 6 days ago
Alaska Airlines
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$276 Return, found 6 days ago
AU$276
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$276 found 6 days ago
Delta
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$283 Return, found 6 days ago
AU$283
Return
found 6 days ago
Select Delta flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$283 found 6 days ago
Alaska Airlines
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$284 Return, found 6 days ago
AU$284
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$284 found 6 days ago
United
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$339 Return, found 6 days ago
AU$339
Return
found 6 days ago
Select United flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$339 found 6 days ago
American Airlines
Sat, 6 June - Sat, 13 June
SEA
Seattle
DEN
Denver
AU$517 Return, found 6 days ago
AU$517
Return
found 6 days ago
Select American Airlines flight, departing Sat, 6 June from Seattle to Denver, returning Sat, 13 June, priced at AU$517 found 6 days ago

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

May is typically the cheapest month to fly

From AU$82 - AU$239 per traveller.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.) cost?
One-way flights typically cost between $139 and $1,041 and return flights often range between $139 and $1,041. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
January is typically the cheapest month to fly from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN), with average return fares of approximately 270 AUD. This is about 24% lower than the average price throughout the year. January often sees lower prices because it falls after the busy holiday travel season, when demand tends to decrease. Other cheap months to fly from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN) include September and October.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
Enter SEA to DEN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
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.) (SEA) to Denver, CO (DEN-Denver Intl.) (DEN) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, F9 typically offers the lowest fares. WN offers the most daily flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) (SEA) to Denver, CO (DEN-Denver Intl.) (DEN), 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.)?
When looking for the best time to fly from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN), it's a balance between price and popularity. Based on booking data from the past year, January and October are typically the cheapest months, with average return flights around 270 AUD. While September and February are popular months for travel, offering plenty of flight options, they might not align with the lowest fares. If you prioritize savings, aim for January or October, but be aware that flight availability might be slightly less compared to peak times.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
When flying from Seattle - Tacoma Intl. (SEA) to Denver Intl. (DEN), you'll find approximately 17 nonstop flights available per day. For even more choice, look at flights that include layovers, as there are around 123 connecting flights per day. Some common connection points include Sky Harbor Intl. (PHX), McCarran 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 at approximately 12:05 AM local time, operated by American Airlines. This is a seasonal service active in February and March. An early departure like this can help you make the most of 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 Friday, with around 88 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include AS, WN, and UA. Flight options on Friday are notably more than other days, offering you a good selection.
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. Around 25% of passengers reckon this time's best. Heaps of major carriers, including Alaska Airlines, Delta Air Lines and Southwest Airlines, offer flights during this window. This timing works well because it allows you to get an early start on your day in Denver.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
Direct flights from SEA to DEN usually take about 2 hours 50 minutes, traveling roughly 1,022 miles. If you opt for a connecting flight, expect to add around 5 hours 10 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Denver, CO (DEN-Denver Intl.)?
Select the "Business class" and "First class" filters when looking for SEA to DEN flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
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 from Seattle - Tacoma Intl. (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 McCarran Intl. (LAS), San Francisco Intl. (SFO), Sacramento Intl. (SMF) 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, United
Return price
AU$220
Distance
1635 km
Average flight time
3 hours 43 mins

Book with confidence

Your quick guide to flights from Seattle to Denver

Pick up great flights from Seattle to Denver

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Seattle to Denver. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to Denver that take around hours.

Find cheap flights from Seattle to Denver

From the great flight deals with prices currently ranging from AU$220 to AU$517, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to Denver around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Denver is normally in June.

Reasons to book your flight from Seattle to Denver with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to Denver across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Denver right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Seattle to Denver

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