161 € Cheap Flights from Boston Logan International to Seattle

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 return flight from Boston Logan International to Seattle? Find the lowest prices on one-way and return tickets right here.

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 March.

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 found161 €
Cheapest month to flyMarch
Average flight time6 hrs, 23 mins
Most popular airlineAlaska Airlines
Average flights per week262

Finding cheap flights from Boston Logan International to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Boston Logan International to Seattle is 161 €. 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.
6 hours and 23 minutes is the average flight time from Boston Logan International to Seattle.
Alaska Airlines, Air Tahiti Nui and Qatar Airways fly direct from Boston Logan International to Seattle.
As of February 2026, there are 262 flights per week flying from Boston Logan International to Seattle.
The cheapest month to fly from Boston Logan International to Seattle is usually March.
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 centre of Seattle. We've found flights into this airport from 161 €.
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 Thursday, 12 March 2026.
Yes – the average flight time is 6 hours and 23 minutes.
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.
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.
In February, the average temperature is usually around 4°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.
Currently, Delta offers the cheapest flight tickets to Seattle.

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

  • Expect to be in the air for 5 hours 25 minutes. That's the average journey time for a direct flight from Logan International Airport to Seattle.

  • Logan International Airport is located in Boston. Following the UTC-7 timezone, Seattle is three hours behind Boston.

  • With 49 flights a week between the two airports, Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) is the busiest route. Alaska Airlines operates the earliest flight at 07:00. If you're eager to get more out of your day before jetting off, the latest flight from BOS to SEA is with Alaska Airlines at 19:35.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to catch your BOS to Seattle flight.

  • Heading off during a peak time like public or school holidays? Expect longer queues at check-in and security. For peace of mind, arrive up to four hours before international flights and two hours ahead of domestic departures.

  • Begin your journey at BOS and fly straight to Seattle-Tacoma International Airport (SEA). That's where you can expect to land when searching for Logan International Airport to Seattle tickets.

  • Pick from a variety of airlines offering direct flights from Logan International Airport to Seattle. Book your ticket with one of these:

  • Located around 3 kilometres from central Boston, BOS can be reached in about 10 minutes by car, depending on traffic. Travelling on public transport takes roughly 25 minutes.

  • In search of a hotel near BOS? If you're boarding an early flight from Logan International Airport to Seattle, these stays will put you moments from your departure lounge:

  • 73.94% of flights taking off from Logan International Airport land at their destination on schedule.

  • The address for BOS is One Harborside Drive.

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

  • 79 € is currently the best price for a one-way Logan International Airport to Seattle flight. Return plane tickets start from 161 €. These fares may change depending on availability.

  • To snag cheap flights from BOS to Seattle, book your trip two months before your departure date.

  • June is the best month for landing an incredible deal on Logan International Airport to Seattle tickets. If you're looking to travel at a different time of year, the 'Whole month' tool will give you the lowest prices across every month.

  • You don't need to check back in every day to find out if fares have dropped when you create a Price Alert. We'll notify you as soon as there's an even bigger deal on cheap flights from BOS to Seattle.

  • Pick your ideal departure and arrival times, number of stops and airlines with our filters. Then, sort the results for your flight from Logan International Airport to Seattle by 'Cheapest,' 'Fastest' or 'Best.'

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) to central Seattle takes about 20 minutes by car. The centre is roughly 23 kilometres away.

  • Travelling to the centre by public transport typically takes 55 minutes.

  • The last thing you need is a lengthy journey to your hotel if you're getting in late on a flight from Logan International Airport to Seattle. Check in to one of these accommodation options near SEA instead:

  • Pick up a Seattle-Tacoma International Airport rental car and explore Seattle and beyond with your own set of wheels. Thrifty, Europcar and Budget are well-known companies to choose from here.

  • Reserving your ride from Seattle-Tacoma International Airport around one week in advance of your flight from BOS to Seattle can help you get the best possible rate.

Lake Union Sea Plane Base Airport (LKE)

  • Once your flight from Logan International Airport to Seattle has hit the tarmac, you can make your way to the city centre in about 10 minutes by car. Central Seattle is roughly 3 kilometres from Lake Union Sea Plane Base Airport (LKE).

  • If you choose to travel on public transport, you'll reach the centre in 25 minutes or so.

  • You'll find some great places to rest your head close to LKE. Unwind and get cosy after your BOS to Seattle flight at any of these well-located options:

Best time to go to Seattle

  • Carefully consider your travel dates before booking your flight from Logan International Airport to Seattle. The city buzzes in high season, but prices are typically higher and major attractions can get busy. Plan your trip to Seattle in low season if you like a more relaxed vibe.

  • The warmest month in Seattle is August, with temperatures ranging between 12ºC (54ºF) and 28ºC (82ºF). Book your Logan International Airport to Seattle plane ticket then if this is the type of weather you enjoy.

  • Look for cheap tickets from BOS to Seattle in February if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -1ºC (30ºF) and 11ºC (52ºF) on average.

More about Seattle

  • After booking your flight from Logan International Airport to Seattle, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Seattle:

  • All great adventures should include a little sightseeing. LMN Architects, Greyhound: Bus Station and Boeing Radiation Effects Lab are must-do's during your Seattle adventure.

Explore more of United States

  • Seattle will leave a lasting impression, but there are so many other corners of United States you'll want to see. About 241 kilometres south of Seattle, a visit to Portland will keep you busy. Start with popular sights like Pioneer Courthouse Square, Portland Japanese Garden and Pittock Mansion.

  • Spokane is another must-experience destination in United States and is around 370 kilometres east of Seattle. No journey is complete without visiting Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.