Cheap flights from Colorado to Seattle from $43
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Seattle departing on 9/2. 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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How to get the cheapest flight ticket from Colorado to Seattle
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 Seattle?
In general, October is the cheapest month to fly from Colorado to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $167. If you don’t want to visit Seattle in October, then you should wait until September to fly from Colorado, when ticket prices are also cheap, with an average price of $171.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Colorado is on a Friday. momondo users have found tickets for Friday departures for as low as $284. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $434.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Colorado in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $258 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $367. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Colorado to Seattle/Tacoma Intl flight route?
Fly from Denver Intl to Seattle/Tacoma Intl for the best Colorado - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $205 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Colorado for as low as $180 on momondo.
What cabin class options are available on Colorado to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Colorado to Seattle/Tacoma 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 Colorado to Seattle/Tacoma Intl?
Frontier, Hawaiian Airlines, and Delta are the most popular carriers operating from Colorado to Seattle/Tacoma Intl
What airlines fly to Seattle?
Frontier, Alaska Airlines and Delta are the top three most popular airlines that fly to Seattle from Colorado according to our data. Frontier is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Colorado to Seattle on average per day?
As of July 2025, 36 flights take off from Colorado and land in Seattle each day. The most common flight departure time for this route is 6:00AM, with 48% of daily flights taking off at noon.
How many flights depart from Colorado to Seattle on average per week?
As of July 2025, 258 flights take off from Colorado and land in Seattle each week. The most common flight departure day for this route is Thu, with 23% of weekly flights taking off on this day.
Cheap Colorado to Seattle flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Colorado to Seattle
When did momondo last update prices for flights from Colorado to Seattle/Tacoma Intl Airport?
Prices for flights from Colorado to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from Colorado to Seattle/Tacoma Intl Airport?
As of July 2025, there are 7 operators available to choose from for flights from Colorado to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Colorado to Seattle/Tacoma 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 Colorado to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma 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 Seattle/Tacoma 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 Colorado to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Colorado to Seattle is Boeing 737-800, representing 12.38% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 11.84%, Boeing 737-900 Passenger/BBJ3 (winglets) at 11.34%, and Boeing 737 MAX 9 at 10.16%.
Best airlines flying from Colorado to Seattle
Compare and see reviews for airlines that fly from Colorado to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $58 | Free Cancellation | Rating 5.9 3,286 reviews | |||
| PriceFrom $109 | Free Cancellation | Rating 8.0 7,982 reviews | |||
| PriceFrom $115 | Free Cancellation | Rating 7.8 2,545 reviews | |||
| PriceFrom $135 | Free Cancellation | Rating 8.0 4,266 reviews | |||
| PriceFrom $148 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $159 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $199 | Free Cancellation | Rating 7.2 10,000 reviews |
Traveling to a place near Seattle?
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Why should I use momondo to find a flight deal from Colorado to Seattle?
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 Colorado to Seattle for you.
Can I find flights from Colorado to Seattle with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Colorado to Seattle flights to just show those with flexible booking policies.
How can momondo help me find flights from Colorado to Seattle?
Once you have performed a search for Colorado to Seattle 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 Colorado to Seattle right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Seattle from Colorado. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.