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CA $161 Cheap Flights from Baltimore (BWI) to Seattle (SEA)

View CA $161 flight on Tue, Aug 11, 2026Opens in a new window

Popular airlines from Baltimore Washington International Airport (BWI) to Seattle-Tacoma International Airport (SEA)

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Cheap flights from Baltimore (BWI) to Seattle (SEA)

Prices were available within the past 7 days and start at CA $161 for one-way flights and CA $321 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Sep 15 - Sun, Sep 20
BWI
Baltimore
SEA
Seattle
CA $321 Roundtrip, found 11 hours ago
CA $321
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Tue, Sep 15 from Baltimore to Seattle, returning Sun, Sep 20, priced at CA $321 found 11 hours ago
American Airlines
Wed, Aug 12 - Wed, Aug 19
BWI
Baltimore
SEA
Seattle
CA $373 Roundtrip, found 6 hours ago
CA $373
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Wed, Aug 12 from Baltimore to Seattle, returning Wed, Aug 19, priced at CA $373 found 6 hours ago
American Airlines
Tue, Aug 11 - Tue, Aug 18
BWI
Baltimore
SEA
Seattle
CA $387 Roundtrip, found 4 hours ago
CA $387
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Tue, Aug 11 from Baltimore to Seattle, returning Tue, Aug 18, priced at CA $387 found 4 hours ago
Alaska Airlines
Fri, Sep 4 - Sun, Sep 13
BWI
Baltimore
SEA
Seattle
CA $428 Roundtrip, found 17 hours ago
CA $428
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Fri, Sep 4 from Baltimore to Seattle, returning Sun, Sep 13, priced at CA $428 found 17 hours ago
Alaska Airlines
Wed, Sep 9 - Sun, Sep 20
BWI
Baltimore
SEA
Seattle
CA $431 Roundtrip, found 10 hours ago
CA $431
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Wed, Sep 9 from Baltimore to Seattle, returning Sun, Sep 20, priced at CA $431 found 10 hours ago
Alaska Airlines
Sat, Aug 22 - Wed, Sep 2
BWI
Baltimore
SEA
Seattle
CA $432 Roundtrip, found 3 days ago
CA $432
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Aug 22 from Baltimore to Seattle, returning Wed, Sep 2, priced at CA $432 found 3 days ago
American Airlines
Tue, Aug 11 - Tue, Aug 18
BWI
Baltimore
SEA
Seattle
CA $439 Roundtrip, found 4 hours ago
CA $439
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Tue, Aug 11 from Baltimore to Seattle, returning Tue, Aug 18, priced at CA $439 found 4 hours ago
Delta
Tue, Sep 15 - Sun, Sep 20
BWI
Baltimore
SEA
Seattle
CA $562 Roundtrip, found 11 hours ago
CA $562
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Sep 15 from Baltimore to Seattle, returning Sun, Sep 20, priced at CA $562 found 11 hours ago
Sun Country Airlines
Mon, Aug 3 - Wed, Aug 5
BWI
Baltimore
SEA
Seattle
CA $771 Roundtrip, found 2 days ago
CA $771
Roundtrip
found 2 days ago
Select Sun Country Airlines flight, departing Mon, Aug 3 from Baltimore to Seattle, returning Wed, Aug 5, priced at CA $771 found 2 days ago
United
Fri, Aug 28 - Sun, Sep 6
BWI
Baltimore
SEA
Seattle
CA $974 Roundtrip, found 3 days ago
CA $974
Roundtrip
found 3 days ago
Select United flight, departing Fri, Aug 28 from Baltimore to Seattle, returning Sun, Sep 6, priced at CA $974 found 3 days ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from CA $944
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from CA $944

Frequently asked questions

How much does a flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from CA $161 and cheap return flights from CA $321 BWI to SEA with Expedia. One-way flights typically cost between CA$217 and CA$949. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when BWI to SEA ticket fares go up or down.
What is the cheapest month to fly from Baltimore, MD (BWI) to Seattle, WA (SEA)?
The cheapest months to fly from Baltimore, MD (BWI) to Seattle, WA (SEA) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Only one airline offers direct flights from Baltimore Washington Intl. Thurgood Marshall (BWI) to Seattle - Tacoma Intl. (SEA). Southwest Airlines operates 9 direct flights from BWI to SEA every week.
How do I find cheap flights from Baltimore, MD (BWI) to Seattle, WA (SEA)?
To find a cheap flight from Baltimore, MD (BWI) to Seattle, WA (SEA), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from BWI to SEA, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Baltimore, MD (BWI) to Seattle, WA (SEA)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 135 connecting flights per day from Baltimore Washington Intl. Thurgood Marshall (BWI) to Seattle - Tacoma Intl. (SEA). Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), O'Hare Intl. (ORD), and Charlotte-Douglas Intl. (CLT).
What is the earliest flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Baltimore Washington Intl. Thurgood Marshall (BWI) to Seattle - Tacoma Intl. (SEA) typically departs around 5:00 AM. This flight is operated by American Airlines. This is a seasonal service active in December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll find the most flights from Baltimore Washington Intl. Thurgood Marshall (BWI) to Seattle - Tacoma Intl. (SEA) on a Friday, with around 79 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, Delta, and United. Fridays offer notably more flight options compared to other days of the week, making it a great day to consider for your journey.
What are the most popular departure times for flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Baltimore Washington Intl. Thurgood Marshall (BWI) to Seattle - Tacoma Intl. (SEA) are in the morning, from 6am to 9am. Many major carriers, including Alaska Airlines, Southwest Airlines and Delta, offer flights during this window. Many travellers prefer these early morning flights as they allow you to arrive at your destination with plenty of time to settle in and start your day.
How long does it take to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
When flying from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.), a nonstop flight typically takes around 5 hours 48 minutes. This route covers a distance of approximately 3748 kilometres. If you opt for a flight with one stop, your travel time will be longer, usually around 8 hours 30 minutes. Flights with two or more stops can take even longer, averaging about 15 hours. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly business class or first class between BWI and SEA. You can fly business class with Alaska Airlines and Delta.First class cabins are available on: Alaska Airlines, Delta, United, and American Airlines.
How do I earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle, WA (SEA) from Baltimore, MD (BWI)?
If you're planning to travel to Seattle from Baltimore Washington Intl. Thurgood Marshall (BWI), you can fly directly into Seattle - Tacoma Intl. (SEA). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), O'Hare Intl. (ORD), or Los Angeles Intl. (LAX) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Baltimore, MD (BWI) to Seattle, WA (SEA)?
If you booked your Baltimore, MD (BWI) to Seattle, WA (SEA) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Sun Country Airlines, United
Roundtrip price
CA $321
Distance
3725 km
Average flight time
3 hours 54 mins

Book with confidence

Baltimore to Seattle Flights

The easy way to book your flights from Baltimore to Seattle 

With Expedia, it’s simple to find and book flights to Seattle from Baltimore whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Seattle - Tacoma Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Baltimore to Seattle today, tomorrow, or this week.  

 

Save dollars with cheap flights from Baltimore Washington Intl. Thurgood Marshall, BWI to Seattle - Tacoma Intl., SEA 

Sort your search results by price to find great deals on your flight from Baltimore to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Baltimore currently is just CA $321 rising to CA $974.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Seattle  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Seattle from Baltimore 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today.

Baltimore to Seattle Flights

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