Cheap flights from Seattle to Denver from C$ 100
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 25/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Frontier flights from Seattle to Denver
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Delta flights from Seattle to Denver
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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?
In general, October is the cheapest month to fly from Seattle to Denver. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 220. If you aren’t able to travel during the month of October, then book flights to Denver from Seattle during September instead. Flights to Denver in September, while not as cheap as those in October, still average around C$ 226.
What is the cheapest day to depart on your flight to Denver?
The cheapest day to depart from Seattle to Denver is on a Monday. Travellers who choose to depart for Denver on a Monday will often find tickets for as low as C$ 245. On the other hand, Wednesday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 326.
What is the cheapest time of day to depart on your flight to Denver?
Our most recent data shows that the best time of day to fly to Denver is in the evening. Flights from Seattle to Denver during this time can be as low as C$ 238. Try not to purchase tickets in the morning because they tend to be around C$ 358. Of course, these prices can vary depending on the time of year and what airport you fly to.
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 C$ 280 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 C$ 237 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Denver Intl flights?
There are 3 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, Delta, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Denver Intl
Which airlines fly to Denver?
Frontier, Alaska Airlines and Delta 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 60% of people opting to fly with this airline when travelling to Denver. Keep in mind that there are 5 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?
As of June 2025, 36 flights take off from Seattle and land in Denver each day. The most common flight departure time for this route is 5:00p.m., with 42% of daily flights taking off in the afternoon.
How many flights depart from Seattle to Denver on average per week?
The number of flights available between Seattle and Denver is 258 per week as of June 2025. The most frequent departure day is Thu, with 22% of weekly flights leaving 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 1640.8 km. By plane, this route typically takes 2h 30m.
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 are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Denver Intl Airport is 5 as of June 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Denver Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Seattle to Denver?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to Denver is Boeing 737-800 Passenger/BBJ2 (winglets) (16.60% of total bookings). The next most popular plane models are Boeing 737-900 Passenger/BBJ3 (winglets) (12.36%), Boeing 737 MAX 8 (11.01%), and Boeing 737 MAX 9 (10.23%).
What is the most popular airline from Seattle to Denver?
momondo data reveals that the most frequently booked airline on the route from Seattle to Denver is Frontier, representing 57% of all bookings. The subsequent popular airlines are Alaska Airlines at 23%, Delta at 9%, and United Airlines at 6%.
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 C$ 72 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom C$ 121 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom C$ 180 | Free Cancellation | Rating 8.0 4,287 reviews | |||
| PriceFrom C$ 189 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom C$ 200 | Free Cancellation | Rating 8.0 10,000 reviews |
Delta Flights From Seattle to Denver
Delta flies from Seattle to Denver around 15 times per week, with 7,950 momondo users rating the airline 8.0/10. The cheapest Delta deal from Seattle to Denver in the last 72 hours was C$ 88 (round-trip), much lower than the average airfare cost of C$ 172 for Delta flights on this route.
Southwest Flights From Seattle to Denver
Southwest (8.0/10 from 4,287 reviews) operates around 26 flights from Seattle to Denver in any given week. The average Southwest airfare for this route is around C$ 177, with deals from around C$ 132 rare but found on momondo. Referenced prices are for round-trip Seattle to Denver flight searches in the last 72 hours.
Travelling to a place near Denver?
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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?
All flight searches from Seattle to Denver on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Seattle to Denver?
Once you have performed a search for Seattle to Denver flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Seattle to Denver right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Seattle to Denver now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Denver and let you know when they change.