Cheap Flights from Seattle to Denver from £15️ (SEA-DEN)

Flights from Seattle to Denver

Hotels in Denver

Worldwide Coverage

Flights to over 5,000 cities

One-stop Service Guarantee

Price guaranteed upon confirmed payment, booking guaranteed once tickets issued

Secure Payment

Convenient & reliable booking and payment system

Flights from Seattle to Denver Starting at £15

We've found these cheap flights for you. You can book one-way or return flight tickets.

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Seattle to Denver

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Airlines Flying from Seattle to Denver

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From £15

Alaska Airlines

From £43

Southwest Airlines

From £60

Sun Country Airlines

From £60

United Airlines

From £62

American Airlines

From £63

Delta Air Lines

From £114

ANA airlines

Find more flights and airlines

Alternative Routes from Seattle to Denver

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Seattle to Denver.

Cheapest
SEA
21:35
2h 50m
Direct
DEN
01:25
Seattle-Tacoma International Airport - Denver International Airport
Tue, Apr 23Frontier Airlines
£15
SEA
21:35
2h 50m
Direct
DEN
01:25
Seattle-Tacoma International Airport - Denver International Airport
Tue, Apr 23Frontier Airlines
£15
Find More Flights

How do I find the cheapest flights?

When are flight tickets from Seattle (SEA) to Denver (DEN) the cheapest?
Airlines adjust prices for flights from Seattle to Denver based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from Seattle (SEA) to Denver (DEN) cost?
According to Trip.com's data, the lowest price is around £178.
How long is the flight from Seattle (SEA) to Denver (DEN)?
It takes about 2 hours 43 minutes to fly from Seattle (SEA) to Denver (DEN).
What are the most popular airlines that fly from Seattle (SEA) to Denver (DEN)?
Airlines with flights from Seattle (SEA) to Denver (DEN): United Airlines, Singapore Airlines, Frontier Airlines, Air Tahiti Nui, Virgin Atlantic, Japan Airlines, Korean Air, Copa Airlines, All Nippon Airways and Delta Air Lines.
What's the most popular airline for direct flights from Seattle (SEA) to Denver (DEN)?
Alaska Airlines operates 1 direct flights from Seattle (SEA) to Denver (DEN).
How many airports in Denver (DEN)?
There are 4 airport(s) in Denver (DEN): Denver Arapahoe County Airport, Denver Buckley Angb, Rocky Mountain Metropolitan Airport and Denver International Airport.

How to find a cheap flight from Seattle to Denver

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Seattle to Denver. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information from Seattle to Denver

Cheapest direct flight price	£15
Cheapest return ticket price	£37
Cheapest month	February
Peak season for travel	July
Flight distance	1,644.78km
Average flight time	2 hours 43 minutes
Popular airline	American Airlines