CA $89 Cheap Flights from Baltimore (BWI) to Seattle (SEA)

View CA $89 flight on Tue, Sep 29, 2026Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at CA $89 for one-way flights and CA $215 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, May 28 - Wed, Jun 3
BWI
Baltimore
SEA
Seattle
CA $215 Roundtrip, found 5 days ago
CA $215
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, May 28 from Baltimore to Seattle, returning Wed, Jun 3, priced at CA $215 found 5 days ago
Alaska Airlines
Fri, Sep 11 - Tue, Sep 15
BWI
Baltimore
SEA
Seattle
CA $224 Roundtrip, found 6 days ago
CA $224
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Sep 11 from Baltimore to Seattle, returning Tue, Sep 15, priced at CA $224 found 6 days ago
Delta
Thu, May 28 - Wed, Jun 3
BWI
Baltimore
SEA
Seattle
CA $225 Roundtrip, found 5 days ago
CA $225
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, May 28 from Baltimore to Seattle, returning Wed, Jun 3, priced at CA $225 found 5 days ago
Alaska Airlines
Fri, Sep 11 - Tue, Sep 15
BWI
Baltimore
SEA
Seattle
CA $229 Roundtrip, found 6 days ago
CA $229
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Sep 11 from Baltimore to Seattle, returning Tue, Sep 15, priced at CA $229 found 6 days ago
Alaska Airlines
Thu, May 28 - Wed, Jun 3
BWI
Baltimore
SEA
Seattle
CA $237 Roundtrip, found 5 days ago
CA $237
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, May 28 from Baltimore to Seattle, returning Wed, Jun 3, priced at CA $237 found 5 days ago
Delta
Thu, May 28 - Wed, Jun 3
BWI
Baltimore
SEA
Seattle
CA $245 Roundtrip, found 5 days ago
CA $245
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, May 28 from Baltimore to Seattle, returning Wed, Jun 3, priced at CA $245 found 5 days ago
Alaska Airlines
Thu, May 28 - Wed, Jun 3
BWI
Baltimore
SEA
Seattle
CA $263 Roundtrip, found 5 days ago
CA $263
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, May 28 from Baltimore to Seattle, returning Wed, Jun 3, priced at CA $263 found 5 days ago
American Airlines
Wed, Sep 9 - Tue, Sep 15
BWI
Baltimore
SEA
Seattle
CA $296 Roundtrip, found 4 days ago
CA $296
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Sep 9 from Baltimore to Seattle, returning Tue, Sep 15, priced at CA $296 found 4 days ago
United
Wed, Jun 3 - Fri, Jun 19
BWI
Baltimore
SEA
Seattle
CA $515 Roundtrip, found 5 days ago
CA $515
Roundtrip
found 5 days ago
Select United flight, departing Wed, Jun 3 from Baltimore to Seattle, returning Fri, Jun 19, priced at CA $515 found 5 days ago
Sun Country Airlines
Wed, Jun 24 - Thu, Jul 2
BWI
Baltimore
SEA
Seattle
CA $662 Roundtrip, found 4 days ago
CA $662
Roundtrip
found 4 days ago
Select Sun Country Airlines flight, departing Wed, Jun 24 from Baltimore to Seattle, returning Thu, Jul 2, priced at CA $662 found 4 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 $699
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from CA $699

Find the cheapest month to fly from Baltimore (BWI) to Seattle (SEA)

April is typically the cheapest month to fly

From CA $213 - CA $581 per traveller.

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?
One-way flights typically cost between $393 and $1,721 and return flights often range between $928 and $3,294. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
January is typically the cheapest month to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.), with average round-trip fares around 735 CAD. This is about 26% lower than the average price throughout the year. January sees lower prices because it falls after the holiday travel rush, when demand drops and airlines compete for bookings. February and October are also good months to find deals on this route.
Which airlines fly direct from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Enter BWI to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.), 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) (BWI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) (SEA) will differ from traveler to traveler. If you like to fly early, AS offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. WN offers the most daily flights from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) (BWI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) (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-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
When looking for the best time to fly from Baltimore Washington International Thurgood Marshall (BWI) to Seattle - Tacoma International (SEA), it's helpful to consider both price and popularity. Based on booking data from the past year, the cheapest months to fly are typically January and February, with average round-trip flights around 735 CAD. However, the most popular months for travel are December and October, which means you'll find plenty of flight options during those times. Since there isn't an overlap between the cheapest and most popular months, you can choose based on your priority: save money by flying in early winter, or enjoy more flight flexibility during the busier periods.
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 at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in December. An early departure like this can help you maximize 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 typically find the most flights from Baltimore Washington Intl. Thurgood Marshall (BWI) to Seattle - Tacoma Intl. (SEA) on a Friday, with around 72 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, Delta Air Lines, and United Airlines. Fridays offer notably more flight options compared to other days of the week.
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 early morning, from 6am to 9am. About 39% of passengers prefer this time. Many major carriers, including Alaska Airlines, Delta Air Lines and United Airlines, offer flights during this window. This timing works well because it allows you to get an early start on your journey and arrive in Seattle with plenty of time to settle in or begin your activities.
How long does it take to fly from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from BWI to SEA typically takes around 5 hours 50 minutes, covering approximately 2,329 miles. Connecting flights on this route usually add 2 hours 40 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Select the "Business class" and "First class" filters when looking for BWI to SEA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
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 from Baltimore Washington Intl. Thurgood Marshall (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 O'Hare Intl. (ORD), Los Angeles Intl. (LAX), San Diego Intl. (SAN) 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-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Baltimore, MD (BWI-Baltimore Washington Intl. Thurgood Marshall) to Seattle, WA (SEA-Seattle - Tacoma Intl.) 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
Roundtrip price
CA $215
Distance
3725 km
Average flight time
4 hours 17 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 $215 rising to CA $662.  

Here are more money-saving tips: 

  • Fly in May 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

Explore a world of travel with Expedia

*Available to Expedia members.