₩152,900 Cheap Flights from Washington (WAS) to Seattle (SEA)

View ₩152,900 flight on Sat, Oct 25, 2025Opens in a new window

Popular airlines from Washington to Seattle, WA (SEA-Seattle - Tacoma Intl.)

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Cheap Flights from Washington to Seattle (WAS-SEA)

Prices were available within the past 7 days and start at ₩152,900 for one-way flights and ₩386,800 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Feb 18 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩386,800 Roundtrip, found 2 days ago
₩386,800
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Feb 18 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩386,800 found 2 days ago
American Airlines
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩388,400 Roundtrip, found 2 days ago
₩388,400
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩388,400 found 2 days ago
American Airlines
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩389,600 Roundtrip, found 2 days ago
₩389,600
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩389,600 found 2 days ago
Delta
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩403,600 Roundtrip, found 2 days ago
₩403,600
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩403,600 found 2 days ago
American Airlines
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩405,200 Roundtrip, found 2 days ago
₩405,200
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩405,200 found 2 days ago
United
Sun, Nov 16 - Thu, Nov 20
BWI
Baltimore
SEA
Seattle
₩407,800 Roundtrip, found 1 day ago
₩407,800
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 16 from Baltimore to Seattle, returning Thu, Nov 20, priced at ₩407,800 found 1 day ago
Delta
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩420,400 Roundtrip, found 2 days ago
₩420,400
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩420,400 found 2 days ago
American Airlines
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩421,900 Roundtrip, found 2 days ago
₩421,900
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩421,900 found 2 days ago
American Airlines
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩423,200 Roundtrip, found 2 days ago
₩423,200
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩423,200 found 2 days ago
United
Thu, Feb 19 - Mon, Feb 23
BWI
Baltimore
SEA
Seattle
₩423,300 Roundtrip, found 2 days ago
₩423,300
Roundtrip
found 2 days ago
Select United flight, departing Thu, Feb 19 from Baltimore to Seattle, returning Mon, Feb 23, priced at ₩423,300 found 2 days ago

Find the cheapest month to fly from Washington (WAS) to Seattle (SEA)

November is typically the cheapest month to fly

From ₩191,450 - ₩579,554 per traveler.

Frequently asked questions

How much is a flight from Washington, DC (WAS-All Airports) to Seattle - Tacoma Intl. Airport (SEA)?
Start packing your bags, because round-trip journeys from Washington, DC (WAS-All Airports) to SEA start from ₩386,800. That's based on airfares available within the last 7 days on Expedia for flights departing within the next year. Prices can move quickly, so book now to lock in the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Washington, DC (WAS-All Airports) to SEA?
When it comes to cancellation fees, each airline has different terms and conditions. If you decide to cancel your getaway, visit our Customer Service Portal.
How do I find cheap flights from Washington, DC (WAS-All Airports) to SEA that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Washington, DC (WAS-All Airports) to SEA flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Washington, DC (WAS-All Airports) to SEA?
The flying distance between Washington, DC (WAS-All Airports) (WAS) and Sea-Tac Airport (SEA) is 3,700 kilometers. Listen to your favorite tunes or read a good book and the journey will fly by.
Which airlines fly direct from Washington, DC (WAS-All Airports) to Sea-Tac Airport?
Alaska Airlines (AS) is the number one choice for many travelers. It offers 117 flights between Washington, DC (WAS-All Airports) and Sea-Tac Airport each month. You could also check out the fares available with United Airlines (UA). It operates 60 flights every month between Maryland and SeaTac.
Are Washington, DC (WAS-All Airports) to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Washington, DC (WAS-All Airports) to Sea-Tac Airport at the last minute could be your ticket to a cheap deal. However, you might miss out on a flight altogether! If you'd rather play it safe, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to 12 months in advance. If your preferred air carrier hasn't released tickets yet, check back frequently as deals are updated all the time on Expedia.

Travel information

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
₩386,800
Distance
3725 km

Book with confidence

Book with confidence

Maryland to Seattle Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Maryland to Seattle will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Seattle.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with WAS to SEA flights that won’t make your bank account wince. Ready to temporarily leave behind Maryland for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to SEA with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

Maryland to Seattle Flights

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