Cheap Flights from Boston Logan International to Seattle / Tacoma International

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Compare Boston Logan International to Seattle / Tacoma International flight deals

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

Book the best Seattle / Tacoma International fare with no extra fees

Flight deals Cheapest month Find the best route Route info FAQs Tips and advice

Flight deals from Boston Logan International to Seattle / Tacoma International

Looking for a cheap last-minute deal or the best return flight from Boston Logan International Airport to Seattle / Tacoma International Airport? If you want to travel next month, return fares start from R 5,061. Find the lowest prices on one-way and return tickets right here.

Seattle.R 2,512 per passenger.Departing Wed, 21 Oct.One-way flight with jetBlue.Outbound direct flight with jetBlue departs from Boston Logan International on Wed, 21 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,512, select.

Seattle.R 2,659 per passenger.Departing Sat, 26 Sep.One-way flight with American Airlines.Outbound indirect flight with American Airlines, departs from Boston Logan International on Sat, 26 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,659, select.

Seattle.R 2,659 per passenger.Departing Tue, 10 Nov.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boston Logan International on Tue, 10 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,659, select.

Seattle.R 2,663 per passenger.Departing Tue, 2 Mar.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boston Logan International on Tue, 2 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,663, select.

Seattle.R 2,663 per passenger.Departing Wed, 6 Jan.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boston Logan International on Wed, 6 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,663, select.

Seattle.R 2,743 per passenger.Departing Tue, 1 Dec.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boston Logan International on Tue, 1 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,743, select.

Seattle.R 2,842 per passenger.Departing Fri, 18 Sep.One-way flight with jetBlue.Outbound direct flight with jetBlue departs from Boston Logan International on Fri, 18 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,842, select.

Seattle.R 2,851 per passenger.Departing Thu, 18 Feb.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boston Logan International on Thu, 18 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 2,851, select.

Seattle.R 3,181 per passenger.Departing Sat, 29 May.One-way flight with United.Outbound indirect flight with United, departs from Boston Logan International on Sat, 29 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,181, select.

Seattle.R 3,292 per passenger.Departing Sun, 1 Nov.One-way flight with KLM.Outbound direct flight with KLM departs from Boston Logan International on Sun, 1 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,292, select.

Seattle.R 3,414 per passenger.Departing Thu, 18 Feb.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Thu, 18 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,414, select.

Seattle.R 3,414 per passenger.Departing Sun, 4 Jul.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Sun, 4 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,414, select.

Seattle.R 3,414 per passenger.Departing Thu, 15 Apr.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Thu, 15 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,414, select.

Seattle.R 3,414 per passenger.Departing Thu, 21 Jan.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Thu, 21 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,414, select.

Seattle.R 3,416 per passenger.Departing Fri, 28 May.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Fri, 28 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,416, select.

Seattle.R 3,416 per passenger.Departing Thu, 17 Dec.One-way flight with Delta.Outbound direct flight with Delta departs from Boston Logan International on Thu, 17 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From R 3,416, select.

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

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 / Tacoma International flights are currently cheapest in October.

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Direct flights from Boston Logan International to Seattle / Tacoma International

Boston Logan International to Seattle / Tacoma International: Alternative routes

Compare routes from Boston Logan International to Seattle below. You may find an airport to fly into that's cheaper, faster, or easier than Seattle / Tacoma International.

Boston to Seattle: Flight information

The things to know before you go.

Cheapest flight found	R 2,512
Cheapest month to fly	October
Average flight time	6 hrs, 24 mins
Most popular airline	Alaska Airlines
Average flights per week	199

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

How much are return flights from Boston Logan International to Seattle / Tacoma International?

The best price we found for a return flight from Boston Logan International to Seattle / Tacoma International is R 4,990. 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 / Tacoma International?

6 hours and 24 minutes is the average flight time from Boston Logan International to Seattle / Tacoma International.

Which airlines fly direct from Boston Logan International to Seattle / Tacoma International?

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

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

As of August 2026, there are 199 flights per week flying from Boston Logan International to Seattle / Tacoma International.

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

The cheapest month to fly from Boston Logan International to Seattle / Tacoma International is usually October.

Which upcoming date is cheapest to fly from Boston Logan International Airport to Seattle / Tacoma International Airport 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 / Tacoma International Airport on Tuesday, 6 October 2026.

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

Yes – the average flight time is 6 hours and 24 minutes.

How can I find the best flight deal to Seattle / Tacoma International?

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 / Tacoma International 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.

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

Currently, jetBlue offers the cheapest flight tickets to Seattle / Tacoma International.

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

Book a direct flight from Boston Logan International Airport to Seattle / Tacoma International Airport and you'll be in the air for an average of 6 hours 25 minutes.
Seattle is three hours behind Boston and observes the UTC-8 timezone.
Choose from 51 weekly Boston Logan International Airport to Seattle / Tacoma International Airport flights. The 07:00 departure with Alaska Airlines is the earliest available. Alaska Airlines operates the latest service of the day at 19:35.
Get to the airport on time so you don't miss your BOS to SEA flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the stress of rushing.
Be prepared for longer queues during popular months like July. Arriving up to four hours in advance for an international flight and two hours for a domestic departure is a good idea.
You can travel nonstop to Seattle, the United States. Jet off with one of these airlines that operate direct flights from Boston Logan International Airport to Seattle / Tacoma International Airport:
The majority of travellers choose to travel with Delta on this route.
JetBlue tops the rankings as the most punctual carrier for BOS to SEA flights, with 84.51% of services arriving as scheduled.
We make it easy to book a flight with a stopover. To see all your options for tickets from Boston Logan International Airport to Seattle / Tacoma International Airport, deselect 'Direct flights only.' Then, pick a flight with a stop long enough to explore your chosen city. Some great stopovers between BOS and SEA include:
- Chicago O'Hare International Airport
- Detroit Wayne County Airport
- Minneapolis St Paul Airport

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

Currently, R 2,512 is the lowest price we've found for a one-way Boston Logan International Airport to Seattle / Tacoma International Airport flight. The best price for a return plane ticket is R 4,990. Bear in mind that fares may change due to availability at the time of booking.
Score cheap tickets from BOS to SEA by booking one month ahead. According to our research, that's the sweet spot for picking up a bargain.
The cheapest month for flights from Boston Logan International Airport to Seattle / Tacoma International Airport is June. Use the 'Whole month' tool to find the lowest prices if you have a flexible travel schedule.
Finding cheap flights from BOS to SEA couldn't be easier with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch when there's a better deal.
Pick your ideal departure and arrival times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Boston Logan International Airport to Seattle / Tacoma International Airport.

Handy information about Boston Logan International Airport (BOS)

You'll find BOS at One Harborside Drive.
Of all flights leaving Boston Logan International Airport, 75% arrive on time at their destination.
To get to Boston Logan International Airport from central Boston, it takes around 20 minutes if you're travelling by car. This depends on traffic though. It's approximately 8 kilometres from the airport to the city centre.
Catching public transport? Expect a trip time of around 25 minutes.
Taking an early flight from Boston Logan International Airport to Seattle / Tacoma International Airport? Avoid the last-minute rush to the terminal (and enjoy a little extra shut-eye) by choosing one of these stays close to BOS:

Arriving at Seattle / Tacoma International Airport (SEA)

If you're arriving on a late Boston Logan International Airport to Seattle / Tacoma International Airport flight, few things beat the convenience of staying near the terminal. Grab your bags from the carousel and then be showered and snoozing not long after at one of these accommodation options near SEA:
Get on the fast track to adventure by picking up a Seattle / Tacoma International Airport rental car. Grab a set of wheels from Thrifty, Europcar or Budget and explore beyond Seattle's main sights.
To lock in the lowest price, reserve your vehicle from Seattle / Tacoma International Airport about one week before your trip.

Getting from Seattle / Tacoma International Airport (SEA) to central Seattle

From Seattle / Tacoma International Airport, Seattle is approximately 23 kilometres away. It takes around 25 minutes to get to the centre driving.
It takes around 35 minutes to get there using public transport.

When to fly to Seattle / Tacoma International Airport (SEA)

It's time to plan your trip dates for your flight from Boston Logan International Airport to Seattle / Tacoma International Airport. July is the busiest month to head to Seattle. If you want a more laid-back vibe, go in March.
Before locking in your flight from Boston Logan International Airport to Seattle / Tacoma International Airport, consider the type of weather you like. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).
Look for cheap tickets from BOS to SEA in February if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between -1ºC (30ºF) and 11ºC (52ºF) on average.

Explore more of the United States

You've visited Seattle, now it's time to explore more of the United States. Travel about 241 kilometres south to Portland to check off its leading sights. From Portland Japanese Garden to Peninsula Park Rose Garden and Beyond Van Gogh Portland, there's plenty to keep you on the go.
If you're eager to discover another well-known destination in the United States, consider Spokane, roughly 370 kilometres east of Seattle. Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes are highlights.