Cheap flights from Seattle to Denver from $73
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Denver departing on 10/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Denver
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Frontier flights from Seattle to Denver
Our best Frontier deals on Seattle to Denver flight tickets
American Airlines flights from Seattle to Denver
Our best American Airlines deals on Seattle to Denver flight tickets
See travel insights to Denver from
How to get the cheapest flight ticket from Seattle to Denver
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Denver?
The cheapest month to fly to Denver from Seattle is in October. Flight prices, which tend to average around $161, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in October, then you should wait until September to fly from Seattle, when ticket prices are also cheap, with an average price of $165.
What is the cheapest day to depart on your flight to Denver?
The cheapest day to depart on your flight to Denver is on a Saturday when prices can be found for as low as $268. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Monday, with ticket prices averaging around $335.
What is the cheapest time of day to depart on your flight to Denver?
The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $210. Flights in the morning are often more expensive with an average ticket price of $332.
What is the cheapest Seattle/Tacoma Intl to Denver Intl flight route?
Fly from Seattle/Tacoma Intl to Denver Intl for the best Seattle/Tacoma Intl - Denver Intl flight prices
How far in advance should I book a flight to Denver?
You are more likely to see cheaper flights to Denver from Seattle when booking 12 weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $205 when searching 12 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Seattle for as low as $168 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Denver Intl flights?
There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Denver Intl?
Hawaiian Airlines, United Airlines, and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Denver Intl
What airlines fly to Denver?
Frontier, Delta and Alaska Airlines are the top three most popular airlines that fly to Denver from Seattle according to our data. Frontier is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 7 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seattle to Denver on average per day?
The number of flights available between Seattle and Denver is 48 per day as of June 2025. The most frequent departure time is 5:00PM, with 42% of daily flights leaving in the afternoon.
How many flights depart from Seattle to Denver on average per week?
As of June 2025, there are 340 flights per week flying from Seattle to Denver. The most common day of the week flights depart is Thu, with 17% of flights taking off on this day.
When to book flights from Seattle to Denver
Cheap Seattle to Denver (SEA to DEN) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Denver
How far is Seattle/Tacoma Intl to Denver Intl by plane?
A flight from Seattle/Tacoma Intl to Denver Intl will travel around 1019.6 mi. Flights usually cover this in 2h 35m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport?
There are 6 operators available for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport as of June 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Denver Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The necessary travel and health documents for your Denver Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Denver?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Denver is Boeing 737-800 Passenger/BBJ2 (winglets), representing 16.77% of all bookings. The subsequent popular models are Boeing 737-900 Passenger/BBJ3 (winglets) at 12.19%, Boeing 737 MAX 8 at 11.10%, and Boeing 737 MAX 9 at 10.39%.
What is the most popular airline from Seattle to Denver?
Based on momondo bookings for flights between Seattle and Denver, the leading airline is Frontier, making up 41% of the total bookings. Other popular airlines include Alaska Airlines with 20%, Delta with 20%, and United Airlines with 12%.
Best airlines flying from Seattle to Denver
Compare and see reviews for airlines that fly from Seattle to Denver with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $57 | Free Cancellation | Rating 5.9 3,296 reviews | |||
| PriceFrom $98 | Free Cancellation | Rating 7.8 2,501 reviews | |||
| PriceFrom $108 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $121 | Free Cancellation | Rating 8.0 4,278 reviews | |||
| PriceFrom $148 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $161 | Free Cancellation | Rating 8.0 10,000 reviews |
Delta Flights From Seattle to Denver
Delta operates around 15 flights from Seattle to Denver every week. The average price of these flights found in the last 72 hours has been $245, but momondo users have found Delta deals from Seattle to Denver from as low as $108 round-trip. Delta has been scored 8.0/10 in 7,963 reviews.
Southwest Flights From Seattle to Denver
Across 4,278 Southwest reviews on momondo, the average score is 8.0/10. Southwest flies from Seattle to Denver about 34 times each week, with ticket deals ranging from $121 to $244. Price data is based on momondo searches in the last 72 hours.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to Denver?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Denver for you.
Can I find flights from Seattle to Denver with flexible booking policies on momondo?
Flights from Seattle to Denver with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Seattle to Denver?
momondo provides multiple filters to help you find the best flight to Denver from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Seattle to Denver right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Seattle to Denver flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.