Cheap flights from Seattle to Denver (SEA - DEN) from $29

This is the cheapest one-way flight price, found on 9/27. Prices may vary by date and flight preferences.
SEA — DEN
Oct 3 — Oct 101

The best prices from Seattle/Tacoma Intl to Denver Intl are usually found in January or February, booked 59 days in advance, depart on a Saturday or Friday and return on a Tuesday

How to find the cheapest flight from Seattle (SEA) to Denver (DEN)

All the information you need to plan the best SEA to DEN flight in 2023: compare Seattle to Denver flight prices with the expected peak season, weather and rainfall in Denver.

Popular in

June

Cheapest in

January

Round-trip from

$197

One-way from

$62
High demand for flights, 33% potential price rise
Best time to find cheap flights, 38% potential price drop
From Seattle/Tacoma Intl to Denver Intl
One-way flight from Seattle/Tacoma Intl to Denver Intl

SEA - DEN

Price

$197 - $392

DEN

Temperature

30.2 - 73.4 °F

DEN

Rainfall

0.5 - 2.3 inches

What is the cheapest day to fly round-trip from Seattle to Denver?

Saturday flights are found to be more expensive to fly from Seattle to Denver. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Denver.

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

Travelers have found it’s best to book a flight 58 days in advance to save up to 11% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 58 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to Denver 1-2 weeks in advance for as low as $268, or $293 for flights within the next 24 hours.

What is the cheapest month to fly from Seattle to Denver?

The best pricing can be found in the month of January. Prices to Denver from Seattle average $256. You can even find prices in January for less than $256, as users have found deals to Denver from as low as $109. The month of June appears to be one of the more expensive times to travel to Denver from Seattle. Flying in the targeted month can save you up to 49%.

When is the cheapest time to fly from Seattle to Denver (SEA - DEN)?

A simple way to save on the total cost of your ticket is to fly from Seattle to Denver at noon. If you’re flexible enough to do this you can expect to save up to 32% on your trip compared to booking a flight in the afternoon.

Cheap Frontier flights from Seattle to Denver

Find some of the cheapest Frontier flights traveling from Seattle to Denver. Deals update often to give you more flight options matching your criteria
  • One of the most popular airlines traveling from Seattle to Denver is Frontier. Flights from Frontier traveling this route typically cost $237.80 RT. This price is typically 16% cheaper than other airlines that offer Seattle to Denver flights. When booking this route, the cheapest RT price found was $97. Seattle/Tacoma Intl Airport is the most common Seattle airport to take off from when flying to Denver. Denver Intl Airport is the most popular arrival airport in Denver. When flying from Seattle to Denver, Frontier flights are 14% more popular than any other airline flying that same route.

Cheap Spirit Airlines flights from Seattle to Denver

Have a look at some of the cheapest available Spirit Airlines flights departing from Seattle and landing in Denver. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
  • If you’re traveling from Seattle to Denver, one of the more common airlines traveling that route is Spirit Airlines. Seattle to Denver flights are typically 29% cheaper than other airlines traveling the same route. Flights from Spirit Airlines typically cost $237.81 RT. The cheapest Spirit Airlines flight found for this route was $94. When traveling from Seattle to Denver on Spirit Airlines, the most popular airport to depart from is Seattle/Tacoma Intl Airport and the most popular airport to arrive at is Denver Intl Airport. When flying from Seattle to Denver, Spirit Airlines flights are 13% more popular than any other airline flying that same route.

Cheap Seattle to Denver flights in September & October 2023

The best prices found for SEA to DEN flights for September, October
These are some of the best deals we've found on flights to Denver in 2023 at this time. Check back in a little while for more flight options.

Seattle to Denver 2023 flight deals

Cheap flights to Denver from Seattle found for this year
These are some of the best deals we've found on flights to Denver in 2023 at this time. Check back in a little while for more flight options.

Non-stop flights to Denver from Seattle

Save time with Seattle to Denver direct flight deals
For a shorter flight, select one of these non-stop flights from Seattle to Denver. Those looking to potentially save on 1 or 2-stop flights from Seattle to Denver should utilize the search form at the the top of the page.

Seattle to Denver flights leaving soon

Late deals on return flights to Denver from Seattle, departing today and this week
Check out these flights departing soon from Seattle to Denver. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to Denver from Seattle

The cheapest one-way flights from Seattle to Denver
Take a look at some of the best available options we've come across on one-way flights from Seattle to Denver. Users needing a return flight from Seattle to Denver should utilize the search form above.

Find flights from Seattle to Denver within your budget

Use the slider to find flights from Seattle to Denver that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$38 - $74

Route

Depart

Return

Price

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/24

Nonstop2h 35m

Denver Intl

Tue 10/31

Nonstop3h 10m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 11/7

Nonstop2h 50m

Denver Intl

Sat 11/11

Nonstop3h 13m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/24

Nonstop2h 35m

Denver Intl

Thu 11/2

Nonstop3h 10m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 12/6

Nonstop2h 45m

Denver Intl

Mon 12/11

Nonstop3h 12m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/24

1 stop9h 56m

Denver Intl

Tue 10/31

Nonstop3h 10m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/24

Nonstop2h 35m

Denver Intl

Fri 10/27

1 stop12h 22m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 12/2

Nonstop2h 45m

Denver Intl

Mon 12/4

1 stop9h 08m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/24

1 stop9h 56m

Denver Intl

Wed 11/1

1 stop12h 22m

Seattle/Tacoma IntlDenver Intl

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/24

1 stop9h 56m

Denver Intl

Mon 10/30

1 stop23h 43m

Flights are sorted by cheapest first

Deals found on 9/26

Reviews of airlines servicing Denver

Read through reviews of airlines operating flights from Seattle to Denver, such as Frontier, Spirit Airlines and Alaska Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
1,394 reviews

Overall

8.1

Comfort

8.0

Boarding

8.3

Food

7.2

Crew

8.6

Entertainment

7.2

Reviews

1 / 10

Excellent airlines the price was great service was excellent plane was very comfortable

Alaska Airlines
8.1
Very good
1,394 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Overall

8.1

Comfort

8.0

Boarding

8.3

Food

7.2

Crew

8.6

Entertainment

7.2

Reviews

1 / 10

Excellent airlines the price was great service was excellent plane was very comfortable

Delta
7.9
Good
3,023 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Overall

8.1

Comfort

8.0

Boarding

8.3

Food

7.2

Crew

8.6

Entertainment

7.2

Reviews

1 / 10

Excellent airlines the price was great service was excellent plane was very comfortable

Sun Country Air
7.4
Good
94 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Overall

8.1

Comfort

8.0

Boarding

8.3

Food

7.2

Crew

8.6

Entertainment

7.2

Reviews

1 / 10

Excellent airlines the price was great service was excellent plane was very comfortable

United Airlines
7.4
Good
1,890 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Overall

8.1

Comfort

8.0

Boarding

8.3

Food

7.2

Crew

8.6

Entertainment

7.2

Reviews

1 / 10

Excellent airlines the price was great service was excellent plane was very comfortable

American Airlines
7.2
Good
2,635 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Overall

8.1

Comfort

8.0

Boarding

8.3

Food

7.2

Crew

8.6

Entertainment

7.2

Reviews

1 / 10

Excellent airlines the price was great service was excellent plane was very comfortable

Related info for your journey

Useful info, stats and facts about Seattle to Denver flights.

What airports do I use to fly from Seattle to Denver?

If you wish to fly to Denver from Seattle, then you need to book flights from Seattle/Tacoma Intl to Denver Intl. There are 31 flights from Seattle/Tacoma Intl (SEA) to Denver Intl (DEN) per day to choose from. Flights to Denver from Seattle/Tacoma Intl are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 2h 35m is how long a nonstop flight from Seattle to Denver Intl typically takes.

Can I find flights from Seattle to Denver for under $100 on Cheapflights?

Yes, there are multiple flights from Seattle to Denver for under $100. The cheapest flight booked recently is on Frontier for just $38, but on average you can expect to pay $60.

Are there nonstop flights from Seattle to Denver for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Seattle to Denver under $100. A good price for a nonstop flight from Seattle to Denver is less than $65.

Are there last-minute flights available from Seattle to Denver for under $100?

There are currently 20+ open flights from Seattle to Denver within the next 7 days for less than $100.

What days are nonstop flights available from Seattle to Denver?

Nonstop flights can be found on the following days: Sunday, Monday, Tuesday, Thursday, Friday, Saturday.

How popular is this Seattle to Denver flight route?

How many flights depart from Seattle to Denver on average per day?

On average, you can expect to see 82 flights from Seattle to Denver a day.
Early Morning (Midnight to 6am) - 9% of flight departures
Morning (6am - Noon) - 35% of flight departures
Afternoon (Noon - 6pm) - 43% of flight departures
Evening (6pm - Midnight) - 13% of flight departures

How long is the flight from Seattle to Denver?

There are many flights that can get you from Seattle to Denver in 2h 35m. Fly via Frontier or Spirit Airlines to get the fastest option. The distance between Seattle and Denver is about 1028 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Seattle to Denver round-trip?

Currently priced at $38, Frontier will fly you from Seattle to Denver and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Spirit Airlines for as low as $69. These flights start at 85% lower than the current average price 3 months from now.

What are the most popular airlines that fly from Seattle to Denver?

What are the most reliable airlines from Seattle to Denver?

No one likes to see their flight delayed. When booking a flight from Seattle to Denver consider choosing Air Europa (100%), Kenya Airways (100%) or Aerolineas Argentinas (100%) as they are the most reliable in getting you off to your destination on time.

What are the cheapest flights from Seattle to Denver?

Looking at all options, your cheapest flight can be booked for $57. While the most popular route (Seattle/Tacoma Intl - Denver Intl) can be booked for $55 on average our data indicates $612 when flying from Seattle to Denver.

What does SEA to DEN mean?

These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to Denver Intl Airport flight would often be abbreviated as a SEA to DEN flight.

Alternative routes for Seattle to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Spokane to Denverfrom $231 pp
Pasco to Denverfrom $351 pp

Top 6 airlines flying from Seattle to Denver

The chart below displays the airlines Cheapflights users traveling from Seattle to Denver choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$150FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$85Average$173FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$94Average$238FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapest$97Average$238FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapest$98Average$289FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$215Average$375FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Hourly flight availability from Seattle to Denver

See what time of day planes typically take off from Seattle to Denver
14%of flight departuresEarly morningMidnight to 6 am
21%of flight departuresMorning6 am to noon
36%of flight departuresAfternoonNoon to 6 pm
29%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Seattle to Denver

See how many times per day planes take to the skies headed from Seattle to Denver
Sunday31daily flights
Monday37daily flights
Tuesday27daily flights
Wednesday24daily flights
Thursday35daily flights
Friday36daily flights
Saturday29daily flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Denver?

Cheapflights makes it easy to find Seattle to Denver flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Denver?

Cheapflights helps you find that perfect flight to Denver from Seattle by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Seattle to Denver with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Denver flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Denver become cheaper?

Yes, Cheapflights does offer price alerts on Seattle to Denver flights so you can book your travels when it’s right. The Price Alert feature is available after a flight search is performed above.

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