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Route

Seattle → Baltimore

SEASeattleSeattle–Tacoma International Airport
BWIBaltimoreBaltimore/Washington International Thurgood Marshall Airport
Distance
2,329 mi
Estimated flight time
~5h 10m

Baltimore is currently 3 hours ahead of Seattle.

Observed nonstop

View the reverse route

How often does this route fly?

Frequency

A couple of times a day

On average around 2 flights a day, observed from October 2025 to September 2026.

2
flights per day
3
busiest month · Jun
1
quietest month · Jan
4 hr 25 min
measured flight time
12 / 12
months seen

Through the year

Per day, month by month

  1. 1Jan2026
  2. 1Feb
  3. 1Mar
  4. 1Apr
  5. 2May
  6. 3Jun
  7. 3Jul
  8. 3Aug
  9. 3Sep
  10. 2Oct2025
  11. 2Nov
  12. 2Dec

Airlines

Who flies it

Alaska Airlinesall year
Southwest Airlinessummer
Atlas Airnow and then

Through the day

Departure times

Local time in Seattle. Most departures between 09:00 and 12:00.

  1. 00:00
  2. 01:00
  3. 02:00
  4. 03:00
  5. 04:00
  6. 05:00
  7. 06:00
  8. 07:00
  9. 08:00
  10. 09:00
  11. 10:00
  12. 11:00
  13. 12:00
  14. 13:00
  15. 14:00
  16. 15:00
  17. 16:00
  18. 17:00
  19. 18:00
  20. 19:00
  21. 20:00
  22. 21:00
  23. 22:00
  24. 23:00

Through the week

By weekday

  1. 1.9Mon
  2. 1.9Tue
  3. 1.9Wed
  4. 1.8Thu
  5. 1.9Fri
  6. 1.8Sat
  7. 1.6Sun

Fleet

Aircraft observed

  1. Boeing 737-900B73943%
  2. Boeing 737 MAX 9B39M33%
  3. Boeing 737-800B73815%
  4. Boeing 737 MAX 8B38M9%
  5. Boeing 747-400B7440%
All the numbers in a table
MonthPer daySeenAirlines
January 2026131
  • Alaska Airlines31×
February 2026127
  • Alaska Airlines27×
March 2026128
  • Alaska Airlines28×
April 2026136
  • Alaska Airlines35×
May 2026248
  • Alaska Airlines48×
June 2026385
  • Alaska Airlines58×
  • Southwest Airlines26×
July 2026388
  • Alaska Airlines61×
  • Southwest Airlines27×
August 2026386
  • Alaska Airlines56×
  • Southwest Airlines29×
  • Atlas Air1×
September 2026388
  • Alaska Airlines60×
  • Southwest Airlines28×
October 2025249
  • Alaska Airlines47×
  • Southwest Airlines2×
November 2025247
  • Alaska Airlines45×
  • Atlas Air2×
December 2025248
  • Alaska Airlines47×
  • Atlas Air1×

Airlines observed on this route

From observed callsign routes on SEA-BWI - not a booking guarantee.

Alaska Airlines

AS · ASA

Hub: SEA Seattle

98 departure airportsView airline →

Atlas Air

5Y · GTI

Hub: MIA Miami

71 departure airportsView airline →

Southwest Airlines

WN · SWA

Hub: DEN Denver

117 departure airportsView airline →

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 Baltimore: 104.

The airports on this route

Seattle–Tacoma International Airport

Seattle, United StatesSEA / KSEA

International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft

67 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Baltimore/Washington International Thurgood Marshall Airport

Baltimore, United StatesBWI / KBWI

Major airport · 104 direct destinations · 3 runways · longest runway 10,502 ft

62 °F · RainSource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Alternative airports for this journey

Same journey, a different airport nearby - with an observed direct connection.

SEA DCARonald Reagan Washington National AirportWashington is about 30 mi from Baltimore.View route →SEA IADWashington Dulles International AirportDulles is about 45 mi from Baltimore.View route →SEA PHLPhiladelphia International AirportPhiladelphia is about 90 mi from Baltimore.View route →

About the route from Seattle to Baltimore

The observed direct connection between Seattle–Tacoma International Airport (SEA) and Baltimore/Washington International Thurgood Marshall Airport (BWI) covers approximately 2,329 mi. The estimated flight time is around 5h 10m. Alaska Airlines, Atlas Air and Southwest Airlines have been observed on this connection in the available route data.

Frequently asked questions about this route

How far is Seattle from Baltimore by air?
The great-circle distance between Seattle–Tacoma International Airport and Baltimore/Washington International Thurgood Marshall Airport is approximately 2,329 mi.
How long is the flight from Seattle to Baltimore?
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 Baltimore?
Yes, a direct connection between SEA and BWI has been observed in our route data.
Which airlines have been observed on this route?
In the available route data: Alaska Airlines, Atlas Air and Southwest Airlines.
How often is there a flight from Seattle to Baltimore?
On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 661 observed flights. Mainly Alaska Airlines, Southwest Airlines, Atlas Air. That is an observation, not a timetable.
What is the current time difference between Seattle and Baltimore?
Baltimore 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.