How often are flights from Denver to Seattle delayed?

Historically, on average around 17% of flights between Denver and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 149 minutes.

Which airline has the best punctuality record on Denver to Seattle flights?

According to our data, Atlas Air have had the fewest delays on this route over the last 12 months, with no flights being classified as delayed.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

What is the most punctual flight time for Denver to Seattle flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

When did momondo last update prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport are updated daily.

How old do you have to be to fly from Denver Intl Airport to Seattle/Tacoma 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 stopovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl Airport 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 licence, 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.

R3 980 Cheap Flights from Denver to Seattle in 2025/26

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How to get the cheapest flight ticket from Denver to Seattle

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What is the cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from Denver is in January. Flight prices, which tend to average around R3 167, are often lower during this time because this is during the off-season. If you aren’t able to travel to Seattle during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of R3 236.

What is the cheapest Denver Intl to Seattle/Tacoma Intl flight route?

Fly from Denver Intl to Seattle/Tacoma Intl for the best Denver Intl - 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 Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around R3 705 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Denver for as low as R3 115 on momondo.

What cabin class options are available on Denver Intl to Seattle/Tacoma Intl flights?

There is only 1 cabin class available to choose from on Denver Intl 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.

How have Denver to Seattle flight prices changed over time?

As of November 2025, prices for Denver to Seattle flights are approximately 5% more expensive when compared to flights at the same time last year.

When to book flights from Denver to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Seattle according to our flight data. Find out which month and days have the cheapest flights.

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Best price found	R3 997
Direct flights	None

The best flight deal from Denver to Seattle found on momondo in the last 72 hours is R3 997

There are no direct flights from Denver to Seattle. There are no popular flight routes from Denver to Seattle.

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How far is Denver Intl to Seattle/Tacoma Intl by plane?
The distance between Denver Intl and Seattle/Tacoma Intl is about 1640,8 km.
When did momondo last update prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport are updated daily.
How old do you have to be to fly from Denver Intl Airport to Seattle/Tacoma 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 stopovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl Airport 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 licence, 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 Denver to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Denver to Seattle is Boeing 737 MAX 9 (14,47% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (12,67%), Boeing 737 MAX 8 (10,98%), and Boeing 737-900 Passenger/BBJ3 (winglets) (10,68%).

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Why should I use momondo to find a flight deal from Denver to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Denver to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Denver to Seattle with flexible booking policies on momondo?

All flight searches from Denver to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Denver to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Denver.

I’m not ready to book a flight from Denver to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from Denver. 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.

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How to get the cheapest flight ticket from Denver 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?

What is the cheapest Denver Intl to Seattle/Tacoma Intl flight route?

Fly from Denver Intl to Seattle/Tacoma Intl for the best Denver Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

What cabin class options are available on Denver Intl to Seattle/Tacoma Intl flights?

There is only 1 cabin class available to choose from on Denver Intl 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.

How have Denver to Seattle flight prices changed over time?

As of November 2025, prices for Denver to Seattle flights are approximately 5% more expensive when compared to flights at the same time last year.

How often are flights from Denver to Seattle delayed?

Historically, on average around 17% of flights between Denver and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 149 minutes.

What is the most punctual flight time for Denver to Seattle flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Denver to Seattle flights?

According to our data, Atlas Air have had the fewest delays on this route over the last 12 months, with no flights being classified as delayed.

When to book flights from Denver to Seattle

Cheap Denver to Seattle (DEN to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Seattle

Best price found

Direct flights

How far is Denver Intl to Seattle/Tacoma Intl by plane?

When did momondo last update prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?

How old do you have to be to fly from Denver Intl Airport to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from Denver to Seattle?

Travelling to a place near Seattle?

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Seattle?

Can I find flights from Denver to Seattle with flexible booking policies on momondo?

How can momondo help me find flights from Denver to Seattle?

I’m not ready to book a flight from Denver to Seattle right now. Can momondo alert me if prices change?

An easier way to manage your Seattle trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Fly your favourite airline to Seattle

Airlines are sorted and displayed according to clicks in the past 7 days on momondo