Cheap flights from Seattle to Denver

Round-trip
Economy
Seattle (SEA)
Denver (DEN)
Depart
Return
Any month
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The best prices from Seattle/Tacoma Intl to Denver Intl are usually found in January or April, booked 18 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

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 2021: compare Seattle to Denver flight prices with the expected peak season, weather and rainfall in Denver.
SEA - DEN
Price
C$ 156 - C$ 272
DEN
Temperature
-1 - 23 °C
DEN
Precipitation
13 - 58 mm

Popular in

December

High demand for flights, 27% potential price rise

Cheapest in

January

Best time to find cheap flights, 22% potential price drop

Average price

C$ 201

Average for round-trip flights in setiembre 2021

Round-trip from

$156

From Seattle/Tacoma Intl to Denver Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
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?

Users have found that booking a flight from Seattle to Denver at least 18 days early can save you up to 14% on average compared to booking a flight this week. If booking 18 days before your flight isn’t an option for you, users have found flights from Seattle to Denver for as little as C$ 187 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as C$ 220 for flights departing within the next 3 days.

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

Unlike in the evening, when flights are generally more expensive, you can save up to 23% on flights from Seattle to Denver by exploring options for tickets at noon.

Cheap flights from Seattle to Denver in September, October 2021

The best prices found for SEA to DEN flights for September, October
12 Oct - 12 Oct
C$ 118pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
20 Oct - 23 Oct
C$ 124pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
18 Oct - 20 Oct
C$ 128pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
 
1 STOP
DEN
Denver Intl
DEN
Denver Intl
Spirit Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Denver 2021 flight deals

Cheap flights to Denver from Seattle found for this year
12 Nov - 15 Nov
C$ 100pp
SEA
Seattle/Tacoma Intl
Frontier
Direct
DEN
Denver Intl
DEN
Denver Intl
Frontier
Direct
SEA
Seattle/Tacoma Intl
12 Oct - 12 Oct
C$ 118pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
20 Oct - 26 Oct
C$ 124pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

Direct flights to Denver from Seattle

Save time with Seattle to Denver direct flight deals
12 Nov - 15 Nov
C$ 100pp
SEA
Seattle/Tacoma Intl
Frontier
Direct
DEN
Denver Intl
DEN
Denver Intl
Frontier
Direct
SEA
Seattle/Tacoma Intl
12 Oct - 12 Oct
C$ 118pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
20 Oct - 23 Oct
C$ 124pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

Last minute flights from Seattle to Denver

Late deals on round-trip flights to Denver from Seattle, departing today and this week
2 Oct - 6 Oct
C$ 153pp
SEA
Seattle/Tacoma Intl
United Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
United Airlines
Direct
SEA
Seattle/Tacoma Intl
30 Sep - 5 Oct
C$ 162pp
SEA
Seattle/Tacoma Intl
Delta
Direct
DEN
Denver Intl
DEN
Denver Intl
Delta
Direct
SEA
Seattle/Tacoma Intl
1 Oct - 5 Oct
C$ 188pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
DEN
Denver Intl
DEN
Denver Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

One-way flights to Denver Intl from Seattle

The cheapest one-way flights from Seattle to Denver
3:32 p.m. - 7:10 p.m.
Alaska Airlines
Direct
2h 38m
SEA - DEN
Alaska Airlines
C$ 203
Alaska Airlines
8:50 p.m. - 6:11 a.m.
Delta
1 stop
8h 21m
SEA - DEN
Delta
C$ 215
Delta
9:20 a.m. - 3:50 p.m.
Spirit Airlines
1 stop
5h 30m
SEA - DEN
Spirit Airlines
C$ 216
Spirit

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Seattle</span> to <span class="emphasized">Denver</span> flights.

Flight FAQs

From Seattle to Denver

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

Booking a flight from Seattle/Tacoma Intl (SEA) to Denver Intl (DEN) is your only option if you wish to fly from Seattle to Denver. On a typical day, there are 25 flights from Seattle/Tacoma Intl to Denver Intl, all of which are around 2h 43m for a nonstop flight. You can also purchase a plane ticket from 4 airlines when you book a flight from Seattle/Tacoma Intl to Denver.

Which airlines flying from Seattle/Tacoma Intl to Denver Intl have flexible cancellations due to COVID-19?

Frontier, Delta, and Alaska Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

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

Yes, there are multiple flights from Seattle to Denver for under C$ 100. The cheapest flight booked recently is on Frontier for just C$ 100, but on average you can expect to pay C$ 137.

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

Cheapflights has 20 direct flights from Seattle to Denver under C$ 100. A good price for a direct flight from Seattle to Denver is less than C$ 145.

Are there last-minute flights available from Seattle to Denver for under C$ 200?

There are currently 20+ open flights from Seattle to Denver within the next 7 days for less than C$ 200.

What days are direct flights available from Seattle to Denver?

You can find direct flights on the following days: Monday, Saturday.

How popular is this Seattle to Denver flight route?

This flight path from Seattle/Tacoma Intl to Denver Intl was viewed by 64 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

Per day, 4 flights depart from Seattle to Denver on average.
Early Morning (Midnight to 6am) - 25% of flight departures
Morning (6am - Midday) - 25% of flight departures
Afternoon (Noon - 6pm) - 25% of flight departures
Evening (6pm - Midnight) - 25% 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 38m. Fly via Frontier, Alaska Airlines, or Delta to get the fastest option. There are 1654 km between Seattle and Denver. All flights are typically direct.

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

According to our current data, Frontier (C$ 100), Alaska Airlines (C$ 118), and Delta (C$ 129) offers the cheapest pricing from Seattle to Denver. Users have found that Frontier is 49% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Seattle to Denver one-way?

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as C$ 63. However, be on the lookout for offers from Alaska Airlines and Spirit Airlines, as they are both options that can get you from Seattle to Denver for a low price.

What are the cheapest flights from Seattle to Denver?

Looking for the cheapest flight from Seattle to Denver? While on average our users pay C$ 171, our data indicates the cheapest price to be C$ 68. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around C$ 150.

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

The most popular airlines flying from Seattle to Denver are Alaska Airlines, Delta and Frontier. Something to consider prior to booking your flight.

What are the most reliable airlines from Seattle to Denver?

Before booking your flight to Denver from Seattle, check out the most reliable airlines to get you to your destination on time: Air France (100%), ANA (100%), Emirates( 89%).

COVID Restrictions

View COVID Travel Restrictions for Denver, CO

Do I need a COVID test to fly to Denver from Seattle?

Information is based on travel restrictions for travel to Denver Intl within the United States

Most visitors from Seattle/Tacoma Intl need to provide a negative COVID-19 test result and/or quarantine to enter Denver Intl.

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Denver Intl.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Denver Intl.

Do I need a test to fly back to Seattle from Denver?

Returning to Seattle/Tacoma Intl from Denver Intl

COVID-19 testing requirements
Visitors from Denver Intl must present a negative RT-PCR (NAAT) test taken 72 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Denver Intl are not required to quarantine after entering Seattle/Tacoma Intl.

Hide COVID Travel Restrictions for Denver, CO

Destination information for Denver

Things to know before you go - useful duration and weather info for your trip from Seattle to Denver.
Flight duration from SEA to DEN
2h 55m
Average temperature for September in Denver
26.0 °C
Avg rainfall for September in Denver
27.0 mm

Airports servicing Seattle

Airports servicing Denver

Top 4 airlines flying from Seattle/Tacoma Intl to Denver Intl

The chart below displays the airlines Cheapflights users travelling from Seattle to Denver choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
C$ 62 C$ 176 No cancel fee 62%
Search Frontier flights
Alaska Airlines
C$ 87 C$ 203 No cancel fee 75%
Search Alaska Airlines flights
Delta
C$ 94 C$ 214 No cancel fee N/A
Search Delta flights
United Airlines
C$ 150 C$ 289 No cancel fee 69%
Search United Airlines flights

Hourly flight availability from Seattle to Denver

See what time of day planes typically take off from Seattle towards Denver.
Morning 6 AM to noon 43% of flight departures
Afternoon Noon to 6 PM 35% of flight departures
Evening 6 PM to midnight 15% of flight departures
Early morning Midnight to 6 AM 7% of flight departures
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.
Sunday
15 daily flights
Monday
30 daily flights
Tuesday
32 daily flights
Wednesday
25 daily flights
Thursday
29 daily flights
Friday
25 daily flights
Saturday
21 daily flights
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