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144 € Cheap Flights from Seattle to Baltimore Washington International

Compare Seattle to Baltimore Washington International flight deals

Find the cheapest month or even day of the year to fly to Baltimore Washington International

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Flight deals from Seattle to Baltimore Washington International

Looking for a cheap last-minute deal or the best return flight from Seattle to Baltimore Washington International? Find the lowest prices on one-way and return tickets right here.
Washington D.C..144 € per passenger.Departing Mon, 15 Sep, returning Mon, 22 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Mon, 15 Sep, arriving in Baltimore Washington International.Inbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Mon, 22 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 144 €, select.
Washington D.C..144 € per passenger.Departing Fri, 3 Oct, returning Sun, 5 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 3 Oct, arriving in Baltimore Washington International.Inbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Sun, 5 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 144 €, select.
Washington D.C..144 € per passenger.Departing Fri, 26 Sep, returning Sun, 5 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 26 Sep, arriving in Baltimore Washington International.Inbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Sun, 5 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 144 €, select.
Washington D.C..160 € per passenger.Departing Fri, 26 Sep, returning Tue, 30 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Fri, 26 Sep, arriving in Baltimore Washington International.Inbound direct flight with Southwest Airlines departs from Baltimore Washington International on Tue, 30 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 160 €, select.
Washington D.C..176 € per passenger.Departing Sat, 15 Nov, returning Mon, 15 Dec.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Sat, 15 Nov, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Mon, 15 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 176 €, select.
Washington D.C..176 € per passenger.Departing Tue, 4 Nov, returning Fri, 7 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Tue, 4 Nov, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Fri, 7 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 176 €, select.
Washington D.C..176 € per passenger.Departing Sat, 25 Oct, returning Sat, 1 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Sat, 25 Oct, arriving in Baltimore Washington International.Inbound indirect flight with Delta, departs from Baltimore Washington International on Sat, 1 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 176 €, select.
Washington D.C..191 € per passenger.Departing Fri, 26 Sep, returning Wed, 1 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Fri, 26 Sep, arriving in Baltimore Washington International.Inbound direct flight with Southwest Airlines departs from Baltimore Washington International on Wed, 1 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 191 €, select.

Find the cheapest month to fly from Seattle to Baltimore Washington International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Baltimore Washington International flights are currently cheapest in September.
Aug
from 281 €
Sep
from 144 €
Oct
from 144 €
Nov
from 176 €
Dec
from 220 €
Jan
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Feb
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Mar
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Apr
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May
from 509 €
Jun
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Jul
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Direct flights from Seattle to Baltimore Washington International

Seattle to Baltimore Washington International: Alternative routes

Compare routes from Seattle to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Baltimore Washington International.

Seattle to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found144 €
Cheapest month to flySeptember
Average flight time5 hrs, 6 mins
Most popular airlineHawaiian Airlines
Average flights per week80

Finding cheap flights from Seattle to Baltimore Washington International: Frequently asked questions

The best price we found for a return flight from Seattle to Baltimore Washington International is 144 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
5 hours and 6 minutes is the average flight time from Seattle to Baltimore Washington International.
Hawaiian Airlines, Air Tahiti Nui and Alaska Airlines fly direct from Seattle to Baltimore Washington International.
As of August 2025, there are 80 flights per week flying from Seattle to Baltimore Washington International.
The cheapest month to fly from Seattle to Baltimore Washington International is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Baltimore Washington International Airport on Monday, 15 September 2025.
Yes – the average flight time is 5 hours and 6 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Baltimore Washington International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

Travelling from Seattle to Baltimore/Wash International Thurgood Marshall Airport (BWI): What you need to know

  • Kick off your travels at Seattle-Tacoma International Airport (SEA), the main airport in Seattle. Look for flights from Seattle to Baltimore/Wash International Thurgood Marshall Airport (BWI) that leave from this terminal.

  • Expect to be in the air for 5 hours 5 minutes. On average, that's the duration of a direct Seattle to Baltimore/Wash International Thurgood Marshall Airport flight.

  • The timezone in Washington DC is UTC-4, which is three hours ahead of Seattle. Baltimore/Wash International Thurgood Marshall Airport is located in Washington DC.

  • Seattle-Tacoma International Airport (SEA) to Baltimore/Wash International Thurgood Marshall Airport (BWI) is the most popular route. There are 14 direct flights a week to choose from. If you have things to do before heading off, hop on the last flight with Alaska Airlines at 10:27pm. Opt for the first SEA to BWI departure with Alaska Airlines at 9:55am if you're aiming for an earlier start.

  • To ensure you catch your flight from Seattle to BWI, leave enough time to check in and drop off your luggage. Arriving two hours ahead of international departures and one hour before domestic flights is the general travel rule.

  • High season means busier airports, so plan to arrive even earlier. Give yourself at least two hours before a domestic flight and four hours for international journeys to stay on schedule.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Get to your destination in one go from Seattle-Tacoma International Airport (SEA). Nonstop flights from Seattle to Baltimore/Wash International Thurgood Marshall Airport (BWI) are available from here.

  • Alaska Airlines is a well-known airline that offers direct flights from Seattle to Baltimore/Wash International Thurgood Marshall Airport jetting out of SEA.

  • Alaska Airlines is the most frequently booked airline offering flights from SEA to BWI.

  • With a dependable 86.46% of services landing on schedule, Alaska Airlines is the most punctual carrier on this route.

  • Travelling from central Seattle to SEA takes around 55 minutes on public transport. If you drive, ride-share or grab a cab, you'll cover the 23 kilometres in 20 minutes or so, depending on traffic conditions.

  • Catching an early flight from Seattle to Baltimore/Wash International Thurgood Marshall Airport? Avoid the hassle of rushing to the terminal (and catch some extra z's) by picking one of these hotels close to Seattle-Tacoma International Airport:

  • 81.27% of flights departing from Seattle-Tacoma International Airport arrive at their destination on schedule. Given its solid on-time performance, you're unlikely to be delayed when jetting out of SEA.

Lake Union Sea Plane Base Airport (LKE)

  • You can arrive at LKE from central Seattle in approximately 10 minutes by car (depending on traffic). The ride on public transport takes roughly 25 minutes to travel the 3 kilometres or so.

  • Want to treat yourself to an extra night away before boarding your Seattle to BWI flight? Kick back in a hotel near Lake Union Sea Plane Base Airport before your trip officially starts. These stays are expecting you:

About Baltimore/Wash International Thurgood Marshall Airport (BWI)

Getting from Baltimore/Wash International Thurgood Marshall Airport (BWI) to central Washington DC

  • Baltimore/Wash International Thurgood Marshall Airport is roughly 40 kilometres from central Washington DC. The time it takes to get there in a car hire or cab will depend on the time of day. Do some research before your trip.

  • Travelling on public transport takes roughly 1 hour 30 minutes.

How to find the cheapest flights from Seattle to Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • 80 € is currently the lowest price for a one-way ticket from Seattle to Baltimore/Wash International Thurgood Marshall Airport. A return flight starts at 144 €. These prices can change depending on availability.

  • Book one month before you want to fly. Pricing trends show that this is the ideal window for finding cheap flights from Seattle to BWI.

  • June is when you're most likely to find a bargain on a Seattle to Baltimore/Wash International Thurgood Marshall Airport ticket. If you'd like to travel during a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • There's no need to search every day to find out if fares have dropped when you create a Price Alert. We'll notify you the moment there's a better deal on plane tickets from Seattle to BWI.

  • Save money on your flight from Seattle to Baltimore/Wash International Thurgood Marshall Airport by using filters. Select your ideal times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Seattle to Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • It's time to work out when to book your flight from Seattle to Baltimore/Wash International Thurgood Marshall Airport (BWI). July is when most people travel to Washington DC. If a slower pace sounds more appealing, head there in May.

  • The warmest month in Washington DC is July, with temperatures ranging between 19ºC (66ºF) and 33ºC (91ºF). Lock in your Seattle to BWI plane ticket then if you enjoy this type of weather.

  • If you like travelling in cooler conditions, look for a cheap ticket from Seattle to Baltimore/Wash International Thurgood Marshall Airport in January when temperatures are between -6ºC (21ºF) and 10ºC (50ºF).

More about Washington DC

Explore more of the United States

  • Washington DC will leave a lasting impression, but there are so many other parts of the United States waiting to be discovered. Around 153 kilometres north-east of Washington DC, a visit to Philadelphia will keep you on the move. Start with attractions like Independence Hall, Liberty Bell and Philadelphia Museum of Art.

  • Around 274 kilometres south of Washington DC, Virginia Beach is another essential stop in the United States. Experience this destination's highlights firsthand at Virginia Beach Oceanfront, Virginia Beach Boardwalk and Resort Beach.

Plan the rest of your trip from Seattle to Washington D.C.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.