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Cheap Flights from Boston Logan International to Seattle

Compare Boston Logan International to Seattle flight deals

Find the cheapest month or even day of the year to fly to Seattle

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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 Airport to Seattle? If you want to travel next month, return fares start from R 4,274. Find the lowest prices on one-way and return tickets right here.
Seattle.R 2,307 per passenger.Departing Wed, 3 Jun.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Boston Logan International on Wed, 3 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,307, select.
Seattle.R 2,380 per passenger.Departing Wed, 26 Aug.One-way flight with United.Outbound indirect flight with United, departs from Boston Logan International on Wed, 26 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,380, select.
Seattle.R 2,383 per passenger.Departing Wed, 9 Sep.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Boston Logan International on Wed, 9 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,383, select.
Seattle.R 2,386 per passenger.Departing Tue, 9 Jun.One-way flight with jetBlue.Outbound direct flight with jetBlue departs from Boston Logan International on Tue, 9 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,386, select.
Seattle.R 2,387 per passenger.Departing Wed, 10 Feb.One-way flight with United.Outbound indirect flight with United, departs from Boston Logan International on Wed, 10 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,387, select.
Seattle.R 2,387 per passenger.Departing Wed, 14 Oct.One-way flight with United.Outbound indirect flight with United, departs from Boston Logan International on Wed, 14 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,387, select.
Seattle.R 2,392 per passenger.Departing Tue, 26 May.One-way flight with jetBlue.Outbound direct flight with jetBlue departs from Boston Logan International on Tue, 26 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,392, select.
Seattle.R 2,392 per passenger.Departing Wed, 1 Jul.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Boston Logan International on Wed, 1 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,392, select.
Seattle.R 2,466 per passenger.Departing Wed, 26 Aug.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Wed, 26 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,466, select.
Seattle.R 2,467 per passenger.Departing Tue, 8 Sep.One-way flight with jetBlue.Outbound direct flight with jetBlue departs from Boston Logan International on Tue, 8 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,467, select.
Seattle.R 2,469 per passenger.Departing Sat, 17 Oct.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Sat, 17 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,469, select.
Seattle.R 2,473 per passenger.Departing Wed, 10 Feb.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Wed, 10 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,473, select.
Seattle.R 2,475 per passenger.Departing Wed, 9 Dec.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Wed, 9 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,475, select.
Seattle.R 2,481 per passenger.Departing Tue, 14 Jul.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Tue, 14 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,481, select.
Seattle.R 2,560 per passenger.Departing Mon, 15 Mar.One-way flight with United.Outbound indirect flight with United, departs from Boston Logan International on Mon, 15 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,560, select.
Seattle.R 3,061 per passenger.Departing Thu, 5 Nov.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Thu, 5 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,061, 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 June.
Apr
from R 6,754
May
from R 2,392
Jun
from R 2,307
Jul
from R 2,392
Aug
from R 2,380
Sep
from R 2,383
Oct
from R 2,387
Nov
from R 3,061
Dec
from R 2,475
Jan
Find prices
Feb
from R 2,387
Mar
from R 2,560

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.

Seattle Lake Union SPB

2km from central Seattle
Closest
from R 4,382
Search flights

Seattle Boeing Fld

11km from central Seattle
from R 6,432
Search flights

Seattle / Tacoma International

20km from central Seattle
Cheapest
from R 2,307
Search flights

Paine Field

33km from central Seattle
from R 2,609
Search flights

Boston to Seattle: Flight information

The things to know before you go.
Cheapest flight foundR 2,307
Cheapest month to flyJune
Average flight time6 hrs, 22 mins
Most popular airlineAlaska Airlines
Average flights per week220

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 R 3,495. 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 22 minutes is the average flight time from Boston Logan International to Seattle.
Alaska Airlines, Qatar Airways and Delta fly direct from Boston Logan International to Seattle.
As of April 2026, there are 220 flights per week flying from Boston Logan International to Seattle.
The cheapest month to fly from Boston Logan International to Seattle is usually August.
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 R 3,495.
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 Wednesday, 26 August 2026.
Yes – the average flight time is 6 hours and 22 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 April, the average temperature is usually around 8°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, Southwest Airlines and Delta offer the cheapest flight tickets to Seattle.

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

  • Expect to be travelling 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 travelling 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.

  • Travelling 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 kilometres 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 R 2,307. The cheapest price for a return flight is R 3,495. 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 centre of Seattle takes around 25 minutes by car. The centre is roughly 23 kilometres away.

  • Getting to the centre 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 centre in about 40 minutes by car. Central Seattle is roughly 40 kilometres 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 kilometres from the centre of Seattle. It'll take you about 20 minutes to reach the city centre in a ride-share or taxi 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 kilometres 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 kilometres 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.

Plan the rest of your trip from Boston to Seattle

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