The flight time from Washington to Seattle is 5 hours, 43 minutes. See Data as Tables

Average Timeline

Leaves IAD Washington, DC 4 minutes early.
15 minutes taxiing out
5 hours, 18 minutes in the air
7 minutes taxiing in
Arrives SEA Seattle, WA 10 minutes early.

Flight Reliability By Airline ?


Flight Summary

The flight time from Washington to Seattle is 5 hours, 43 minutes. The time spent in the air is 5 hours, 18 minutes.

The flight distance from Washington to Seattle is 2306 Miles.

Reverse Journey

Seattle to Washington
4 hours, 47 minutes

Flight Time By Airline ?

5h 38m
5h 44m
5h 47m
Taxiing Out
Air Time
Taxiing In

Flight Time by Time of Day ?

Taxiing Out
Air Time
Taxiing In

Flights By Time of Day ?


Flights Per Week



2306 Miles

Flights By Month ?


Flights By Day of Week ?


Flights By Airline ?
(Per Week)


Frequently Asked Questions

How far is Washington from Seattle by plane?

The distance from Washington to Seattle by plane is 2306 Miles. This is the air distance on the most direct route taken by the vast majority of flights.

How long is the flight from Washington to Seattle?

The flight time from Washington to Seattle is 5 hours, 43 minutes. The time spent in the air is 5 hours, 18 minutes. These numbers are averages. In reality, it varies by airline with Alaska being the fastest taking 5 hours, 38 minutes, and United the slowest taking 5 hours, 47 minutes.

What airlines fly from Washington to Seattle?

Alaska, Delta, and United are the airlines with direct flights from Washington to Seattle.

Does Southwest fly from Washington to Seattle?

Southwest does not fly from Washington (IAD) to Seattle (SEA). Keep in mind that Southwest may fly to other nearby airports, as they will often fly into smaller airpors instead of larger ones. This is because the costs are often lower to fly into smaller airports, and they pass the savings on to you.

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 Washington 4 minutes early
Taxi Out Time 15 minutes
In the Air 318 minutes
Taxiing In 7 minutes
Arrives Seattle 10 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 Washington to Seattle, Alaska is 87% reliable, which means that Alaska flights are on time 87% of the time, and cancelled or delayed the remaining time.

Airline Normal Flights Arrival Delayed* Flight Cancelled
Alaska 87% 9% 4%
United 87% 7% 6%
Delta 85% 9% 6%

Flight Time By Airline Flight Time By Airline Chart

Each airline takes a different amount of time to fly between Washington and Seattle, 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
Alaska 15 314 7 338
Delta 13 318 7 344
United 16 321 8 347

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
8am 0.64
5pm 1.32
11am 0.28
6pm 0.17
7pm 0.2
10am 0.11
7am 0.04
12pm 0.16

Flights By Month Flights By Month Chart

The quantity of flights from Washington to Seattle 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 119
February 104
March 155
April 56
May 30
June 30
July 58
August 115
September 129
October 64
November 138
December 131

Flights By Day Of Week Flights By Day of Week Chart

The quantity of flights from Washington to Seattle 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 3.35
Tuesday 3.15
Wednesday 3.02
Thursday 3.21
Friday 3.33
Saturday 2.44
Sunday 3.21

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
United 0
Alaska 0
Delta 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
8am 15 319 8 344
5pm 16 321 7 347
11am 13 305 6 326
6pm 17 312 7 338
7pm 15 322 9 352
10am 14 319 6 340
7am 11 316 8 347
12pm 13 321 7 340
* Delayed more than 20 minutes.
All data above is a median or mean as appropriate.