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Cheap flights from Baltimore Washington International to Seattle

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Compare Baltimore Washington International to Seattle flight deals

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Flight deals from Baltimore Washington International to Seattle

Looking for a cheap last-minute deal or the best round-trip flight from Baltimore Washington International to Seattle? Find the lowest prices on one-way and round-trip tickets right here.
Seattle.C$274 per passenger.Departing Mon, Jul 28, returning Fri, Aug 29.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Mon, Jul 28, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Fri, Aug 29, arriving in Baltimore Washington International.Price includes taxes and charges.From C$274, select.
Seattle.C$274 per passenger.Departing Fri, Jun 13, returning Fri, Jun 20.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Fri, Jun 13, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Fri, Jun 20, arriving in Baltimore Washington International.Price includes taxes and charges.From C$274, select.
Seattle.C$274 per passenger.Departing Fri, Aug 8, returning Fri, Aug 15.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Fri, Aug 8, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Fri, Aug 15, arriving in Baltimore Washington International.Price includes taxes and charges.From C$274, select.
Seattle.C$274 per passenger.Departing Fri, Sep 5, returning Sun, Sep 7.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Fri, Sep 5, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Sun, Sep 7, arriving in Baltimore Washington International.Price includes taxes and charges.From C$274, select.
Seattle.C$274 per passenger.Departing Mon, Jun 16, returning Fri, Aug 15.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Mon, Jun 16, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Fri, Aug 15, arriving in Baltimore Washington International.Price includes taxes and charges.From C$274, select.
Seattle.C$274 per passenger.Departing Mon, Jun 30, returning Thu, Jul 3.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Mon, Jun 30, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Thu, Jul 3, arriving in Baltimore Washington International.Price includes taxes and charges.From C$274, select.
Seattle.C$287 per passenger.Departing Mon, Jun 2, returning Sat, Sep 13.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Mon, Jun 2, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departing from Seattle / Tacoma International on Sat, Sep 13, arriving in Baltimore Washington International.Price includes taxes and charges.From C$287, select.
Seattle.C$288 per passenger.Departing Tue, Jul 15, returning Tue, Jul 22.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Baltimore Washington International on Tue, Jul 15, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departing from Seattle / Tacoma International on Tue, Jul 22, arriving in Baltimore Washington International.Price includes taxes and charges.From C$288, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Baltimore Washington International to Seattle flights are currently cheapest in June.
May
from C$329
Jun
from C$274
Jul
from C$288
Aug
from C$274
Sep
from C$274
Oct
from C$288
Nov
from C$289
Dec
from C$965
Jan
Find prices
Feb
from C$418
Mar
Find prices
Apr
Find prices

Direct flights from Baltimore Washington International to Seattle

Alternative Baltimore Washington International to Seattle routes

Looking for the cheapest, fastest or easiest route from Baltimore Washington International to Seattle? You could fly into the following airports instead.

Washington, D.C. to Seattle: Flight information

The things to know before you go.
Cheapest flight foundC$274
Cheapest month to flyJune
Average flight time5 hrs, 48 mins
Most popular airlineAir Tahiti Nui
Average flights per week50

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

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a round-trip flight from Baltimore Washington International to Seattle is C$274. 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 48 minutes is the average flight time from Baltimore Washington International to Seattle.
Air Tahiti Nui, Southwest Airlines and Alaska Airlines fly direct from Baltimore Washington International to Seattle.
There are 100 flights per week flying from Baltimore Washington International to Seattle, as of May 2025.
The cheapest month to fly from Baltimore Washington International to Seattle is usually May 2025.
If you're flying from Baltimore Washington International Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the center of Seattle. We've found flights to this airport from C$274.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Baltimore Washington International Airport to Seattle on Friday, June 13, 2025.
Yes – the average flight time is 5 hours and 48 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 Seattle 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 Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 12°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, Frontier Airlines and Hawaiian Airlines offer the cheapest flight tickets to Seattle.

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

  • Around 5 hours 5 minutes is how long you can expect to be travelling on a direct flight from Baltimore/Wash International Thurgood Marshall Airport to Seattle.

  • Seattle is three hours behind Washington DC, where Baltimore/Wash International Thurgood Marshall Airport is located. Seattle runs on the UTC-7 timezone.

  • Baltimore/Wash International Thurgood Marshall Airport (BWI) to Seattle-Tacoma International Airport (SEA) is the most popular route, with 14 weekly departures to choose from. If you prefer starting your day later, the last flight from BWI to SEA is with Alaska Airlines at 19:17. Opt for the first departure operated by Alaska Airlines at 07:06 if you want to get on your way earlier.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to board your BWI to Seattle flight.

  • If you're heading away during a public holiday or another peak period, give yourself more time. A good general rule is two hours before domestic flights and up to four hours before international departures. Lines at check-in and security will be longer.

  • You can book a direct Baltimore/Wash International Thurgood Marshall Airport to Seattle ticket. Start your journey at BWI and land at Seattle-Tacoma International Airport (SEA).

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

  • BWI is about 40 kilometres from central Washington DC. If you're ride-sharing, catching a cab or driving from the centre, it'll take you 50 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the trip time to be around 1 hour 30 minutes.

  • Want an easy start to your vacation? Stay near BWI. Whether you've booked an early flight from Baltimore/Wash International Thurgood Marshall Airport to Seattle or want to avoid feeling rushed, these hotels put convenience first:

  • 77.13% of flights that depart Baltimore/Wash International Thurgood Marshall Airport touch down at their destination on time.

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

  • C$137 is currently the lowest price for a one-way Baltimore/Wash International Thurgood Marshall Airport to Seattle flight. Return flight tickets start from C$274. These prices may change based on availability.

  • To pick up cheap flights from BWI to Seattle, book your journey one month before your departure date.

  • Plan your trip for May. That's the best month for landing a bargain on Baltimore/Wash International Thurgood Marshall Airport to Seattle tickets. If you have flexibility with your dates, use the 'Whole month' tool to find the lowest price across every month.

  • Snapping up a cheap flight from BWI to Seattle is a breeze with Price Alerts. All you need to do is set up one of these automatic notifications and we'll let you know when a new discount appears.

  • Choose your ideal departure and arrival times, number of stops and airlines with our filters. Then, sort the results for your flight from Baltimore/Wash International Thurgood Marshall Airport to Seattle by 'Fastest,' 'Best' or 'Cheapest.'

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) to the centre of Seattle takes about 20 minutes to reach by car. The centre is roughly 23 kilometres away.

  • If you're travelling by public transport, expect a journey time of around 55 minutes.

  • The last thing you want is a long journey to your hotel if you're arriving on a late flight from Baltimore/Wash International Thurgood Marshall Airport to Seattle. Book one of these accommodation options near SEA instead:

  • Say yes to new adventures by picking up a Seattle-Tacoma International Airport rental car. Grab a set of wheels from Thrifty, Europcar or Budget and experience the lesser-explored corners of Seattle and beyond.

  • Lock in the best possible rate by reserving your ride from Seattle-Tacoma International Airport around one week in advance of your flight from BWI to Seattle.

Lake Union Sea Plane Base Airport (LKE)

  • Lake Union Sea Plane Base Airport (LKE) is roughly 3 kilometres from the centre of Seattle. Once you've hopped off your flight from Baltimore/Wash International Thurgood Marshall Airport to Seattle, it'll take you around 10 minutes to get to the heart of the city in a ride-share or cab.

  • Public transport will get you there in about 25 minutes.

  • Place the 'Do not disturb' sign on your door and unwind at a hotel close to LKE. Here are a few options where you can check in after your BWI to Seattle flight:

Best time to go to Seattle

  • Carefully consider your dates before locking in your flight from Baltimore/Wash International Thurgood Marshall Airport to Seattle. The city buzzes in high season, but hotel rates are typically higher and attractions can get busy. Plan your trip to Seattle in the off-season if you want a more relaxed vibe.

  • The warmest month in Seattle is August, with temperatures ranging between 12ºC (54ºF) and 28ºC (82ºF). Lock in your Baltimore/Wash International Thurgood Marshall Airport to Seattle flight ticket then if that's your ideal forecast.

  • Search for cheap tickets from BWI to Seattle in February if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -1ºC (30ºF) and 11ºC (52ºF) on average.

More about Seattle

  • After booking your flight from Baltimore/Wash International Thurgood Marshall Airport to Seattle, choose a hotel that combines comfort with a great location. Make one of these options your base for exploring Seattle:

  • All great adventures should include a little sightseeing. LMN Architects, Greyhound: Bus Station and Boeing Radiation Effects Lab are essential stops on your Seattle itinerary.

Explore more of United States

  • You've seen Seattle, now it's time to explore other corners of United States. Travel around 241 kilometres south to Portland to check off its top attractions. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, you'll have a full itinerary ahead.

  • If you're looking to explore another corner of United States, consider Spokane, about 370 kilometres east of Seattle. Manito Park, Northwest Museum of Arts & Culture and Spokane Falls are key highlights.

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

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