Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
75 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Seattle → Washington
SEA
SeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International AirportDCAWashingtonRonald Reagan Washington National Airport
WashingtonRonald Reagan Washington National Airport- Distance
- 2,323 mi
- Estimated flight time
- ~5h 10m
Washington is currently 3 hours ahead of Seattle.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 3 flights a day, observed from October 2025 to September 2026.
- 3
- flights per day
- 3
- busiest month · Oct
- 2.5
- quietest month · Nov
- 4 hr 24 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 3Jan2026
- 3Feb
- 3Mar
- 3Apr
- 3May
- 3Jun
- 3Jul
- 3Aug
- 3Sep
- 3Oct2025
- 2.5Nov
- 2.5Dec
Airlines
Who flies it
Alaska Airlinesall year
Delta Air Linesall year
Through the day
Departure times
Local time in Seattle. Most departures between 07:00 and 10:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 2.7Mon
- 2.5Tue
- 2.7Wed
- 2.7Thu
- 2.6Fri
- 2.7Sat
- 2.6Sun
Fleet
Aircraft observed
- Boeing 737-800B73854%
- Boeing 757-200B75221%
- Airbus A321neoA21N15%
- Boeing 737 MAX 8B38M11%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 3 | 77 |
|
| February 2026 | 3 | 75 |
|
| March 2026 | 3 | 75 |
|
| April 2026 | 3 | 79 |
|
| May 2026 | 3 | 82 |
|
| June 2026 | 3 | 81 |
|
| July 2026 | 3 | 83 |
|
| August 2026 | 3 | 75 |
|
| September 2026 | 3 | 86 |
|
| October 2025 | 3 | 90 |
|
| November 2025 | 2.5 | 73 |
|
| December 2025 | 2.5 | 69 |
|
Airlines observed on this route
From observed callsign routes on SEA-DCA - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Seattle: 132.
- Direct destinations observed from Washington: 111.
The airports on this route
Ronald Reagan Washington National Airport
Washington, United StatesDCA / KDCA
Major airport · 111 direct destinations · 3 runways · longest runway 7,169 ft
68 °F · ThunderstormSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Seattle to Washington
The observed direct connection between Seattle–Tacoma International Airport (SEA) and Ronald Reagan Washington National Airport (DCA) covers approximately 2,323 mi. The estimated flight time is around 5h 10m. Alaska Airlines and Delta Air Lines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Seattle from Washington by air?
- The great-circle distance between Seattle–Tacoma International Airport and Ronald Reagan Washington National Airport is approximately 2,323 mi.
- How long is the flight from Seattle to Washington?
- Based on the distance, the estimated flight time is about 5h 10m. This is an estimate, not a schedule.
- Is there a direct connection from Seattle to Washington?
- Yes, a direct connection between SEA and DCA has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Alaska Airlines and Delta Air Lines.
- How often is there a flight from Seattle to Washington?
- On average around 3 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 945 observed flights. Mainly Alaska Airlines, Delta Air Lines. That is an observation, not a timetable.
- What is the current time difference between Seattle and Washington?
- Washington is currently 3 hours ahead of Seattle.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.