Cheap flights from Baltimore to Seattle from $88
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Baltimore to Seattle departing on 10/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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United Airlines flights from Baltimore to Seattle
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How to get the cheapest flight ticket from Baltimore to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
In general, January is the cheapest month to fly from Baltimore to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $310. If you don’t want to visit Seattle in January, then you should wait until September to fly from Baltimore, when ticket prices are also cheap, with an average price of $358.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Baltimore is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $441. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Baltimore because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $571.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Baltimore in the evening is the least expensive time of day to depart. momondo users have found prices as low as $417 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $523. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Baltimore/Washington to Seattle/Tacoma Intl flight route?
Fly from Baltimore/Washington to Seattle/Tacoma Intl for the best Baltimore/Washington - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Baltimore when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $413 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Baltimore for as low as $333 on momondo.
What cabin class options are available on Baltimore/Washington to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Baltimore/Washington to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Baltimore/Washington to Seattle/Tacoma Intl?
American Airlines, Delta, and Spirit Airlines are the most popular carriers operating from Baltimore/Washington to Seattle/Tacoma Intl
What airlines fly to Seattle?
Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Seattle from Baltimore according to our data. Alaska Airlines is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 9 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Baltimore to Seattle on average per day?
The number of flights available between Baltimore and Seattle is 5 per day as of June 2025. The most frequent departure time is 7:00AM, with 45% of daily flights leaving at noon.
How many flights depart from Baltimore to Seattle on average per week?
The number of flights available between Baltimore and Seattle is 38 per week as of June 2025. The most frequent departure day is Tue, with 18% of weekly flights leaving on this day.
When to book flights from Baltimore to Seattle
Cheap Baltimore to Seattle (BWI to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Baltimore to Seattle
How far is Baltimore/Washington to Seattle/Tacoma Intl by plane?
The straight-line distance from Baltimore/Washington to Seattle/Tacoma Intl is 2326.9 mi. 5h 40m is a normal flight duration for this route.
When did momondo last update prices for flights from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport?
As of June 2025, there are 9 operators available to choose from for flights from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Baltimore to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Baltimore to Seattle is Boeing 737 MAX 9 (23.56% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (19.52%), Boeing 737 (14.74%), and Boeing 737-900 Passenger/BBJ3 (winglets) (13.18%).
What is the most popular airline from Baltimore to Seattle?
Based on momondo bookings for flights between Baltimore and Seattle, the leading airline is Alaska Airlines, making up 57% of the total bookings. Other popular airlines include Delta with 11%, American Airlines with 7%, and United Airlines with 6%.
Best airlines flying from Baltimore to Seattle
Compare and see reviews for airlines that fly from Baltimore to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $130 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $140 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $206 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $206 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $244 | Free Cancellation | Rating 6.9 345 reviews | |||
| PriceFrom $244 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $273 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $277 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $337 | Free Cancellation | Rating 8.0 4,287 reviews |
Alaska Airlines Flights From Baltimore to Seattle
The lowest priced Alaska Airlines flight from Baltimore to Seattle from the last 72 hours was $277. Generally, Alaska Airlines has 5 flights on this route every week with an average price of $473. Alaska Airlines is rated 8.0/10 by our users.
Southwest Flights From Baltimore to Seattle
The best Southwest deal for Baltimore to Seattle flight tickets found on momondo in the last 72 hours was $337, round-trip. It should be noted that an average Southwest flight deal for this route in this time was higher, at $519 round-trip. Southwest operates 7 flights out of Baltimore into Seattle in an average week, so prices vary by time and availability. 4,287 Southwest reviews by users on momondo have scored the airline at 8.0/10.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Baltimore to Seattle?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Baltimore to Seattle. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Baltimore to Seattle with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Baltimore to Seattle flights to just show those with flexible booking policies.
How can momondo help me find flights from Baltimore to Seattle?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Baltimore to Seattle.
I’m not ready to book a flight from Baltimore to Seattle right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Baltimore to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.