Cheap Flights from Baltimore Washington International (BWI) to Seattle (SEAA)

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 return flight from Baltimore Washington International Airport to Seattle? If you want to travel next month, return fares start from £261. Find the lowest prices on one-way and return tickets right here.

Seattle.£66 per passenger.Departing Wed, 16 Sep.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Baltimore Washington International on Wed, 16 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £66, select.

Seattle.£74 per passenger.Departing Wed, 16 Sep.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Wed, 16 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £74, select.

Seattle.£84 per passenger.Departing Mon, 13 Jul.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Baltimore Washington International on Mon, 13 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £84, select.

Seattle.£84 per passenger.Departing Tue, 25 Aug.One-way flight with Delta.Outbound indirect flight with Delta, departs from Baltimore Washington International on Tue, 25 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £84, select.

Seattle.£110 per passenger.Departing Sun, 15 Nov.One-way flight with United.Outbound indirect flight with United, departs from Baltimore Washington International on Sun, 15 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £110, select.

Seattle.£111 per passenger.Departing Mon, 5 Oct.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Baltimore Washington International on Mon, 5 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £111, select.

Seattle.£115 per passenger.Departing Mon, 24 Aug.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Mon, 24 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £115, select.

Seattle.£134 per passenger.Departing Mon, 5 Apr.One-way flight with United.Outbound indirect flight with United, departs from Baltimore Washington International on Mon, 5 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £134, select.

Seattle.£137 per passenger.Departing Fri, 15 Jan.One-way flight with United.Outbound indirect flight with United, departs from Baltimore Washington International on Fri, 15 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £137, select.

Seattle.£146 per passenger.Departing Tue, 3 Nov.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Tue, 3 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £146, select.

Seattle.£146 per passenger.Departing Thu, 1 Oct.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Thu, 1 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £146, select.

Seattle.£148 per passenger.Departing Mon, 8 Mar.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Baltimore Washington International on Mon, 8 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £148, select.

Seattle.£164 per passenger.Departing Mon, 13 Jul.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Mon, 13 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £164, select.

Seattle.£164 per passenger.Departing Mon, 1 Mar.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Mon, 1 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £164, select.

Seattle.£164 per passenger.Departing Sat, 10 Apr.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Baltimore Washington International on Sat, 10 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £164, select.

Seattle.£171 per passenger.Departing Tue, 30 Jun.One-way flight with United.Outbound indirect flight with United, departs from Baltimore Washington International on Tue, 30 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From £171, 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 September.

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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 found	£66
Cheapest month to fly	September
Average flight time	5 hrs, 47 mins
Most popular airline	Alaska Airlines
Average flights per week	27

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

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are return flights from Baltimore Washington International to Seattle?

The best price we found for a return flight from Baltimore Washington International to Seattle is £168. 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.

How long does it take to fly from Baltimore Washington International to Seattle?

5 hours and 47 minutes is the average flight time from Baltimore Washington International to Seattle.

Which airlines fly direct from Baltimore Washington International to Seattle?

Alaska Airlines, Southwest Airlines and Finnair fly direct from Baltimore Washington International to Seattle.

How many flights are there a week from Baltimore Washington International to Seattle?

As of June 2026, there are 27 flights per week flying from Baltimore Washington International to Seattle.

When is the cheapest time to fly from Baltimore Washington International to Seattle?

The cheapest month to fly from Baltimore Washington International to Seattle is usually August.

Which is the cheapest airport to fly into in Seattle?

If you're flying from Baltimore Washington International Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 12.1 miles away from the centre of Seattle. We've found flights into this airport from £168.

Which upcoming date is cheapest to fly from Baltimore Washington International Airport to Seattle on?

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, 28 August 2026.

Can I get a direct flight from Baltimore Washington International Airport to Seattle?

Yes – the average flight time is 5 hours and 47 minutes.

How can I get the best flight deal from Baltimore Washington International Airport to Seattle?

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.

When is the best time to book flights to Seattle?

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.

What’s the weather like in Seattle?

In June, the average temperature is usually around 14°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.

Which is the cheapest airline to fly from Baltimore Washington International Airport to Seattle with?

Currently, Delta and Alaska Airlines offer the cheapest flight tickets to Seattle.

Travelling from Baltimore Washington International Airport (BWI) to Seattle: what you need to know

Book a direct flight from Baltimore Washington International Airport to Seattle and you'll be travelling for an average of 5 hours.
The timezone in Seattle is UTC-8. The city is three hours behind Washington DC, where Baltimore Washington International Airport is located.
The most popular route is from Baltimore Washington International Airport (BWI) to Seattle-Tacoma International Airport (SEA). Take your pick of 13 services every week between these two airports. If you'd like to take off as soon as possible, the earliest flight from BWI to SEA is the 07:06 Alaska Airlines option. If you prefer travelling later, the last departure is at 19:17 with Alaska Airlines.
For hassle-free travel, arrive 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.
You can expect longer lines during popular months such as July. Arriving up to four hours ahead of an international flight and two hours for a domestic departure is a good idea.
You can book a direct Baltimore Washington International Airport to Seattle ticket. Start your journey at BWI and end it at Seattle-Tacoma International Airport (SEA).
Alaska Airlines is a popular carrier that operates direct flights from Baltimore Washington International Airport to Seattle.
Located around 40 kms (25 miles) from central Washington DC, BWI can be reached in about 40 minutes by car. Travelling on public transport takes roughly 50 minutes.
Booked an early flight from Baltimore Washington International Airport to Seattle? Avoid the hassle of rushing to the terminal (and sneak in some extra snooze time) by choosing one of these stays close to BWI:
Of all flights departing from Baltimore Washington International Airport, 77% land on schedule at their destination.

How to find the cheapest flights from Baltimore Washington International Airport (BWI) to Seattle

The lowest price we've seen for a one-way Baltimore Washington International Airport to Seattle flight is £66. The cheapest price for a return flight is £168. Remember fares may change due to demand at the time of booking.
Don't wait until the last minute. You're more likely to land cheap flights from BWI to Seattle if you book in advance. Airlines often offer some amazing early bird deals.
If you're flexible with your trip dates, make the most of the 'Whole month' tool. It'll give you the lowest price across each month when searching for a Baltimore Washington International Airport to Seattle ticket.
Cut down on the time spent looking for cheap flights from BWI to Seattle by creating a Price Alert. We'll send you an email or notification on the app when a lower fare becomes available.
Save on your flight from Baltimore Washington International Airport to Seattle with the help of our filters. Choose your ideal departure time, duration and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA) is around 23 kms (14 miles) from central Seattle. If you're opting for a ride-share or a taxi, the drive takes roughly 25 minutes.
It takes around 35 minutes to get there by public transport.
If you're arriving on a late flight from Baltimore Washington International Airport to Seattle, nothing beats the convenience of staying near the terminal. Grab your suitcases from the carousel and then be showered and sleeping soon after at one of these accommodation options near SEA:
Booking your ride from Seattle-Tacoma International Airport around one week before your flight from BWI to Seattle can help you lock in the best possible rate.

Seattle Paine Field International Airport (PAE)

Once your flight from Baltimore Washington International Airport to Seattle has hit the tarmac, you can reach the city centre in around 40 minutes by car. Central Seattle is roughly 40 kms (25 miles) from Seattle Paine Field International Airport (PAE).
If you choose to travel on public transport, the journey will take you 1 hour 30 minutes or so.
You'll find some comfortable places to call home for the night near PAE. Unwind and get cosy after your BWI to Seattle flight at any of these perfectly located options:
Avoid the slow-moving lines and paperwork at the rental desk by having everything prearranged. Secure your ride from PAE ahead of time so you can simply grab the keys and get going.

King County International Airport (BFI)

Hop off your flight from Baltimore Washington International Airport to Seattle and make your way to your hotel or start discovering the city right away. The centre of Seattle is around 11 kms (7 miles) from King County International Airport (BFI) and usually takes 20 minutes to reach by car.
Public transport will take you there in around 35 minutes.
Choose a hotel close to BFI and go from landing to lounging in your room in a flash. Whether you have a late BWI to Seattle flight or just want to simplify your travel plans, these accommodation options offer a quick route to a good night's sleep:
Rental agencies sometimes offer discounts on early bookings, so secure your vehicle from BFI a few weeks ahead of your flight from Baltimore Washington International Airport to Seattle. A little planning can save you money.

Best time to go to Seattle

It's time to plan your trip dates for your flight from Baltimore Washington International Airport to Seattle. July is the most popular month to travel to Seattle. If you prefer a quieter atmosphere, go in December.
The warmest month in Seattle is August, with temperatures ranging between 12ºC and 28ºC. Lock in your Baltimore Washington International Airport to Seattle plane ticket then if you enjoy this type of weather.
If you like travelling in cooler conditions, look for a cheap ticket from BWI to Seattle in February when temperatures average between -1ºC and 11ºC.

More about Seattle

Start your Seattle trip right by choosing the ideal place to stay. As soon as you've booked your flight from Baltimore Washington International Airport to Seattle, check out our range of accommodation options including:
There are so many things to explore in this city it can be hard to figure out where to begin. Pike Place Market, Space Needle and Seattle Skyline are highlights which should be on any good Seattle itinerary.

Explore more of the United States

Portland is just one of the many places in the United States waiting to be explored after you've seen Seattle. Around 241 kms (150 miles) away to the south, check out popular attractions including Portland Japanese Garden, Peninsula Park Rose Garden and Beyond Van Gogh Portland.
Around 370 kms (230 miles) east of Seattle, Spokane is another favourite stop in the United States. Start your sightseeing at Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes.