The flight time from Seattle to Denver is 2 hours, 35 minutes. See Data as Tables

Average Timeline

Leaves SEA Seattle, WA 1 minute early.
18 minutes taxiing out
2 hours, 7 minutes in the air
7 minutes taxiing in
Arrives DEN Denver, CO 3 minutes early.

Flight Reliability By Airline ?


Flight Summary

The flight time from Seattle to Denver is 2 hours, 35 minutes. The time spent in the air is 2 hours, 7 minutes.

The flight distance from Seattle to Denver is 1024 Miles.

Reverse Journey

Denver to Seattle
2 hours, 54 minutes

Flight Time By Airline ?

2h 30m
2h 35m
2h 35m
2h 37m
2h 38m
Taxiing Out
Air Time
Taxiing In

Flight Time by Time of Day ?

12AM06AM12PM06PM 30m1h1h 30m2h2h 30m
Taxiing Out
Air Time
Taxiing In

Flights By Time of Day ?


Flights Per Week



1024 Miles

Flights By Month ?


Flights By Day of Week ?


Flights By Airline ?
(Per Week)


Frequently Asked Questions

How far is Seattle from Denver by plane?

The distance from Seattle to Denver by plane is 1024 Miles. This is the air distance on the most direct route taken by the vast majority of flights.

How long is the flight from Seattle to Denver?

The flight time from Seattle to Denver is 2 hours, 35 minutes. The time spent in the air is 2 hours, 7 minutes. These numbers are averages. In reality, it varies by airline with Southwest being the fastest taking 2 hours, 30 minutes, and Alaska the slowest taking 2 hours, 38 minutes.

What airlines fly from Seattle to Denver?

Delta, Frontier, Southwest, Alaska, and United are the airlines with direct flights from Seattle to Denver.

Does Southwest fly from Seattle to Denver?

Yes! Southwest does fly from Seattle (SEA) to Denver (DEN). On average, they have 25 flights per week on this route. This may vary seasonally, please check the chart above for more details.

Tables and Explanations

Data Source

Our information is computed from the latest available data from the US Department of Transportation.

Average Timeline Timeline Chart

The average timeline contains the median time a flight spends in 3 stages. The first of these three stages is taxiing out which includes the time from the flight leaving the gate to taking off. The second stage is in the air, which includes the time spent from the flight leaving the ground to touching back down at the end of it's journey. The last stage is taxiing in, which is from when the flight touches down to the flight arriving at it's gate.

The average timeline also estimates on average of when the flight will leave and arrive relative to it's stated departure time.

Leaves Seattle 1 minute early
Taxi Out Time 18 minutes
In the Air 127 minutes
Taxiing In 7 minutes
Arrives Denver 3 minutes early

Flight Reliability Reliability Chart

The reliability of an airline measures how often the airline's flights on this route are cancelled or delayed more than 20 minutes. For example, from Seattle to Denver, Delta is 85% reliable, which means that Delta flights are on time 85% of the time, and cancelled or delayed the remaining time.

Airline Normal Flights Arrival Delayed* Flight Cancelled
Delta 85% 15% 0%
United 84% 15% 1%
Southwest 82% 16% 2%
Frontier 78% 21% 1%
Alaska 78% 20% 2%

Flight Time By Airline Flight Time By Airline Chart

Each airline takes a different amount of time to fly between Seattle and Denver, this is due to different operational factors on the ground, as well as scheduling of planes. Each airline's flight time is split into three stages which are described above in the "Average Timeline" section. There are also miscellaneous operational issues which are included in the below total but are not accounted for in one of the three stages.

Airline Taxiing Out
In the Air
Taxiing In
Southwest 17 127 6 150
Delta 17 127 8 155
Frontier 15 126 11 155
United 19 127 8 157
Alaska 21 128 7 158

Flights By Time of Day Flight Time By Day Chart

This one is pretty self explanatory, it represents the number of flights that leave the gate in a given hour of the day. The tricky thing here is that this is normally not a whole number since it is an average over 52 weeks. Partial numbers may indicate that a flight may be seasonal or may take off at different times due to different operational factors.

Time Count
7pm 1.78
6am 2.17
6pm 0.75
9am 0.19
2pm 0.28
8am 1.15
5pm 1.09
7am 1.73
8pm 0.25
11am 2.53
3pm 3.05
1pm 0.56
9pm 0.32
4pm 0.13
12pm 1.21
0am 0.36
5am 0.53
10am 0.51

Flights By Month Flights By Month Chart

The quantity of flights from Seattle to Denver that take off in a given month of the year. This number changes because some flights are seasonal, and almost all flights have uneven demand througout the year.

Month Count
January 499
February 441
March 474
April 487
May 572
June 643
July 696
August 694
September 643
October 616
November 537
December 565

Flights By Day Of Week Flights By Day of Week Chart

The quantity of flights from Seattle to Denver that take off on a given day of the week. Some routes only have enough demand to sustain a few trips a week, while others have many flights a day. This number is also an average across the year, and hence may not be a whole number.

Day Count
Monday 19.29
Tuesday 19.33
Wednesday 19.02
Thursday 19.23
Friday 19.13
Saturday 17.27
Sunday 18.79

Flight per Airline (per Week) Flights By Airline Chart

How many times an airline flies this route in a week. Different factors play into how often a carrier chooses to fly a given route including it's need to connect disparate routes, and demand.

Airline Flights per Week
Alaska 1
United 1
Delta 1
Southwest 0
Frontier 0

Flight Time By Time of Day Flight Time by Time of Day Chart

The total flight time varies by each hour of the day due to factors such as airport traffic. More flights leaving an airport may cause higher taxi in or taxi out times. See the description of the average timeline above for a deeper discussion of each of these times.

Time Taxi Out
In the Air
Taxi In
7pm 16 126 7 150
6am 19 128 8 156
6pm 15 125 8 152
9am 18 130 9 157
2pm 14 126 7 149
8am 22 127 7 157
5pm 19 126 7 153
7am 22 127 7 161
8pm 15 123 6 145
11am 20 128 8 158
3pm 18 128 8 156
1pm 18 126 8 154
9pm 20 127 6 153
4pm 16 127 7 150
12pm 20 128 7 157
0am 12 124 10 149
5am 15 127 8 151
10am 20 127 7 156
* Delayed more than 20 minutes.
All data above is a median or mean as appropriate.