Cheap flights from Boston Logan International to Seattle

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Compare Boston Logan International to Seattle flight deals

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Flight deals from Boston Logan International to Seattle

Looking for a cheap last-minute deal or the best round-trip flight from Boston Logan International Airport to Seattle? If you want to travel next month, round-trip fares start from $328. Find the lowest prices on one-way and round-trip tickets right here.

Seattle.$328 per passenger.Departing Mon, Sep 21, returning Tue, Sep 22.Round-trip flight with jetBlue.Outbound direct flight with jetBlue departing from Boston Logan International on Mon, Sep 21, arriving in Seattle / Tacoma International.Inbound direct flight with jetBlue departing from Seattle / Tacoma International on Tue, Sep 22, arriving in Boston Logan International.Price includes taxes and charges.From $328, select.

Seattle.$328 per passenger.Departing Wed, Oct 14, returning Tue, Oct 20.Round-trip flight with jetBlue.Outbound direct flight with jetBlue departing from Boston Logan International on Wed, Oct 14, arriving in Seattle / Tacoma International.Inbound direct flight with jetBlue departing from Seattle / Tacoma International on Tue, Oct 20, arriving in Boston Logan International.Price includes taxes and charges.From $328, select.

Seattle.$330 per passenger.Departing Wed, Feb 17, returning Wed, Feb 24.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Wed, Feb 17, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Wed, Feb 24, arriving in Boston Logan International.Price includes taxes and charges.From $330, select.

Seattle.$330 per passenger.Departing Tue, Nov 10, returning Sat, Nov 14.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Tue, Nov 10, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Sat, Nov 14, arriving in Boston Logan International.Price includes taxes and charges.From $330, select.

Seattle.$330 per passenger.Departing Wed, Dec 2, returning Wed, Dec 9.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Wed, Dec 2, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Wed, Dec 9, arriving in Boston Logan International.Price includes taxes and charges.From $330, select.

Seattle.$330 per passenger.Departing Tue, Mar 2, returning Tue, Mar 16.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Tue, Mar 2, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Tue, Mar 16, arriving in Boston Logan International.Price includes taxes and charges.From $330, select.

Seattle.$330 per passenger.Departing Sat, Sep 26, returning Sat, Oct 3.Round-trip flight with jetBlue.Outbound direct flight with jetBlue departing from Boston Logan International on Sat, Sep 26, arriving in Seattle / Tacoma International.Inbound direct flight with jetBlue departing from Seattle / Tacoma International on Sat, Oct 3, arriving in Boston Logan International.Price includes taxes and charges.From $330, select.

Seattle.$342 per passenger.Departing Tue, Oct 27, returning Mon, Nov 2.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Tue, Oct 27, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Mon, Nov 2, arriving in Boston Logan International.Price includes taxes and charges.From $342, select.

Seattle.$342 per passenger.Departing Thu, Jan 21, returning Sat, Jan 30.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Thu, Jan 21, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Sat, Jan 30, arriving in Boston Logan International.Price includes taxes and charges.From $342, select.

Seattle.$349 per passenger.Departing Thu, Nov 26, returning Thu, Dec 3.Round-trip flight with United.Outbound indirect flight with United, departing from Boston Logan International on Thu, Nov 26, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departing from Seattle / Tacoma International on Thu, Dec 3, arriving in Boston Logan International.Price includes taxes and charges.From $349, select.

Seattle.$352 per passenger.Departing Wed, May 12, returning Wed, May 19.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Wed, May 12, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Wed, May 19, arriving in Boston Logan International.Price includes taxes and charges.From $352, select.

Seattle.$352 per passenger.Departing Tue, Feb 23, returning Tue, Mar 2.Round-trip flight with United.Outbound indirect flight with United, departing from Boston Logan International on Tue, Feb 23, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departing from Seattle / Tacoma International on Tue, Mar 2, arriving in Boston Logan International.Price includes taxes and charges.From $352, select.

Seattle.$365 per passenger.Departing Sun, Jan 31, returning Tue, Feb 9.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Sun, Jan 31, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Tue, Feb 9, arriving in Boston Logan International.Price includes taxes and charges.From $365, select.

Seattle.$387 per passenger.Departing Wed, Dec 16, returning Mon, Jan 4.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Boston Logan International on Wed, Dec 16, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departing from Seattle / Tacoma International on Mon, Jan 4, arriving in Boston Logan International.Price includes taxes and charges.From $387, select.

Seattle.$389 per passenger.Departing Wed, Apr 14, returning Wed, Apr 28.Round-trip flight with United.Outbound indirect flight with United, departing from Boston Logan International on Wed, Apr 14, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departing from Seattle / Tacoma International on Wed, Apr 28, arriving in Boston Logan International.Price includes taxes and charges.From $389, select.

Seattle.$389 per passenger.Departing Tue, Apr 20, returning Tue, May 4.Round-trip flight with United.Outbound indirect flight with United, departing from Boston Logan International on Tue, Apr 20, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departing from Seattle / Tacoma International on Tue, May 4, arriving in Boston Logan International.Price includes taxes and charges.From $389, select.

Find the cheapest month to fly from Boston Logan International to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Boston Logan International to Seattle flights are currently cheapest in September.

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Direct flights from Boston Logan International to Seattle

Alternative Boston Logan International to Seattle routes

Looking for the cheapest, fastest or easiest route from Boston Logan International to Seattle? You could fly into the following airports instead.

Boston to Seattle: Flight information

The things to know before you go.

Cheapest flight found	$328
Cheapest month to fly	September
Average flight time	6 hrs, 25 mins
Most popular airline	Alaska Airlines
Average flights per week	271

Finding cheap flights from Boston Logan 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 round-trip flights from Boston Logan International to Seattle?

The best price we found for a round-trip flight from Boston Logan International to Seattle is $328. 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 Boston Logan International to Seattle?

6 hours and 25 minutes is the average flight time from Boston Logan International to Seattle.

Which airlines fly direct from Boston Logan International to Seattle?

Alaska Airlines, Qatar Airways and Delta fly direct from Boston Logan International to Seattle.

How many flights are there a week from Boston Logan International to Seattle?

There are 271 flights per week flying from Boston Logan International to Seattle, as of September 2026.

When is the cheapest time to fly from Boston Logan International to Seattle?

The cheapest month to fly from Boston Logan International to Seattle is usually September.

What's the cheapest airport to fly to in Seattle?

If you're flying from Boston Logan International Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the center of Seattle. We've found flights to this airport from $328.

Which upcoming date is cheapest to fly from Boston Logan International Airport to Seattle on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boston Logan International Airport to Seattle on Monday, September 21, 2026.

Can I get a direct flight from Boston Logan International Airport to Seattle?

Yes – the average flight time is 6 hours and 25 minutes.

How can I get the best flight deal from Boston Logan 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 September, the average temperature is usually around 17°C. August is typically the warmest month in Seattle, when it usually averages around 25°C. You can expect the least rain in July. The coldest month is January, with temperatures averaging 4°C. The rainiest month is December.

Which is the cheapest airline to fly with from Boston Logan International Airport to Seattle?

Currently, jetBlue offers the cheapest flight tickets to Seattle.

Traveling from Boston Logan International Airport (BOS) to Seattle: what you need to know

Expect to be traveling for 5 hours 30 minutes. On average, that's the time it takes for a direct flight from Boston Logan International Airport to Seattle.
Seattle is three hours behind Boston, where Boston Logan International Airport is located. Seattle runs on the UTC-8 timezone.
The most popular route is from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA). Choose from 51 weekly services between these two airports. If you want to take off as soon as possible, the earliest flight from BOS to SEA is the 07:00 Alaska Airlines service. If you prefer traveling later, the last departure is at 19:35 with Alaska Airlines.
For a relaxed start to your BOS to Seattle flight, leave enough time for things like check-in and baggage drop. Turning up two hours ahead of international departures and an hour before domestic flights is the general travel rule.
Traveling during a peak time like July? Major public holidays and other high seasons can lead to longer lines and delays at check-in and security. Be extra cautious and get there up to four hours before international flights and two hours before a domestic departure.
You can book a direct Boston Logan International Airport to Seattle ticket. Start your journey at BOS and arrive at Seattle-Tacoma International Airport (SEA).
Well-known carriers that offer direct flights from Boston Logan International Airport to Seattle include:
Located around 3 kilometers from central Boston, BOS can be reached in about 20 minutes by car, depending on traffic. The journey on public transport will take roughly 25 minutes.
Looking for a hotel near BOS? If you're catching an early flight from Boston Logan International Airport to Seattle, these stays will put you moments from your departure lounge:
Of all flights leaving Boston Logan International Airport, 75% land on time at their destination.
BOS is located at One Harborside Drive.

How to find the cheapest flights from Boston Logan International Airport (BOS) to Seattle

The best price we've seen for a one-way Boston Logan International Airport to Seattle flight is $165. The cheapest price for a return flight is $328. Keep in mind fares can change due to availability at the time of booking.
Book one month before flying. Research on pricing trends suggests this is the ideal window for finding cheap flights from BOS to Seattle.
The best month for picking up cheap Boston Logan International Airport to Seattle tickets is June. Use the 'Whole month' tool to compare all available prices, then choose the dates that offer the lowest fares.
There's no need to check back in every day to see if fares have dropped when you create a Price Alert. We'll update you as soon as there's an updated deal for cheap flights from BOS to Seattle.
Save on your flight from Boston Logan International Airport to Seattle with the help of our filters. Choose your ideal duration, departure time 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) to the center of Seattle takes around 25 minutes by car. The center is roughly 23 kilometers away.
Getting to the center on public transport typically takes 35 minutes.
Consider staying in a hotel near SEA if you're coming in on a late flight from Boston Logan International Airport to Seattle. Pick one of these accommodation options and make arrival day easier:
Lock in the best rate by reserving your ride from Seattle-Tacoma International Airport around one week before your flight from BOS to Seattle.

Seattle Paine Field International Airport (PAE)

Once your flight from Boston Logan International Airport to Seattle has hit the runway, you can make your way to the city center in about 40 minutes by car. Central Seattle is roughly 40 kilometers from Seattle Paine Field International Airport (PAE).
Public transport will get you there in about 1 hour 30 minutes.
Following your BOS to Seattle flight, unwind at a hotel near PAE. These are some comfortable accommodation options that'll help you sink into relaxation mode:
In general, the sooner you book, the bigger the savings and variety of vehicles. Reserve your ride from PAE once you know your travel dates.

King County International Airport (BFI)

King County International Airport (BFI) is about 11 kilometers from the center of Seattle. It'll take you about 20 minutes to reach the city center in a ride-share or cab after your flight from Boston Logan International Airport to Seattle.
If you travel by public transport, the journey time is about 35 minutes.
Enjoy a low-stress, comfortable start to your trip by choosing a hotel near BFI after your BOS to Seattle flight. Recover from your travel day or just give yourself time to settle into a new destination at:
Rental providers sometimes offer promotions for early bookings, so secure your ride from BFI well ahead of your flight from Boston Logan International Airport to Seattle. A little planning can save you money.

Best time to go to Seattle

July is the most popular month for flights from Boston Logan International Airport to Seattle. To steer clear of the crowds, plan your trip to Seattle in December.
The warmest month in Seattle is August, with temperatures ranging between 12ºC (54ºF) and 28ºC (82ºF). Book your Boston Logan International Airport to Seattle plane ticket then if you enjoy this type of weather.
February sees average temperatures of between -1ºC (30ºF) and 11ºC (52ºF). Look for a cheap ticket from BOS to Seattle around that time if you'd rather travel in cooler conditions.

More about Seattle

Once you've booked your flight from Boston Logan International Airport to Seattle, find a hotel that offers both comfort and a great location. Make one of these options your base for exploring Seattle:
Pike Place Market and Space Needle are just two of the popular attractions to add to your Seattle itinerary. Keep the adventure rolling by checking out Seattle Skyline.

Explore more of the United States

You've seen Seattle, now it's time to discover other corners of the United States. Journey about 241 kilometers south to Portland to tick off its top sights. From Portland Japanese Garden to Peninsula Park Rose Garden and Beyond Van Gogh Portland, you'll have a full itinerary ahead.
Around 370 kilometers east of Seattle, Spokane is another essential stop in the United States. Get a taste of what this destination has to offer at Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes.