Cheap Flights from Seattle / Tacoma International to Boston Logan International

Compare Seattle / Tacoma International to Boston Logan International flight deals

Find the cheapest month or even day of the year to fly to Boston Logan International

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Flight deals from Seattle / Tacoma International Airport to Boston Logan International Airport

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to Boston Logan International Airport? If you want to travel next month, return fares start from Rs59,488. Find the lowest prices on one-way and return tickets right here.

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

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

Direct flights from Seattle / Tacoma International to Boston Logan International

Seattle to Boston: Flight information

The things to know before you go.
Cheapest flight foundRs25,755
Cheapest month to flyMay
Average flight time5 hrs, 29 mins
Most popular airlineAlaska Airlines
Average flights per week256

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

The best price we found for a return flight from Seattle / Tacoma International to Boston Logan International is Rs51,303. 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.
5 hours and 29 minutes is the average flight time from Seattle / Tacoma International to Boston Logan International.
Alaska Airlines, Qatar Airways and Delta fly direct from Seattle / Tacoma International to Boston Logan International.
As of March 2026, there are 256 flights per week flying from Seattle / Tacoma International to Boston Logan International.
The cheapest month to fly from Seattle / Tacoma International to Boston Logan International is usually March.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Boston Logan International Airport on Monday, 30 March 2026.
Yes – the average flight time is 5 hours and 29 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 Boston Logan 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.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Boston is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Hawaiian Airlines offers the cheapest flight tickets to Boston Logan International.

Flying from Seattle-Tacoma International Airport (SEA) to Logan International Airport (BOS): what you need to know

  • Take a direct flight from Seattle-Tacoma International Airport to Logan International Airport and you'll be in the air for an average of 5 hours 20 minutes.

  • The timezone in Boston is UTC-4, which is three hours ahead of Seattle.

  • Every week, there are 54 Seattle-Tacoma International Airport to Logan International Airport flights. If you want to take off as soon as possible, go for the 06:30 Alaska Airlines flight. If you're eager to make the most of your time before flying, the last flight is at 23:59 with JetBlue Airways.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Get to the airport on time to catch your SEA to BOS flight.

  • Be prepared for longer queues in popular months such as July. Arriving up to four hours ahead of international flights and two hours for a domestic departure will give you ample time for security and boarding.

  • With direct flights from Seattle-Tacoma International Airport to Logan International Airport available from numerous airlines, getting to Boston (and then other destinations in United States) is a breeze. You can fly nonstop with:

  • The airline with the highest booking volume on this route is Alaska Airlines.

  • With a dependable 87.05% of services arriving as planned, Delta Air Lines has the best on-time record for SEA to BOS flights.

  • Consider adding a stopover when booking your ticket from Seattle-Tacoma International Airport to Logan International Airport. Simply deselect 'Direct flights only' to break up your trip, or perhaps explore a new destination along the way. Here's where you can stop between SEA and BOS:

    • Minneapolis-St. Paul International Airport

    • Chicago Midway International Airport

    • Detroit Metropolitan Wayne County Airport

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

  • The lowest price we've found for a one-way Seattle-Tacoma International Airport to Logan International Airport flight is Rs25,755. A return fare is currently Rs51,303. Depending on the availability and when you book, these fares may change.

  • Get cheap tickets from SEA to BOS by booking at least six months ahead. Based on our research, that's the sweet spot for finding a bargain.

  • The cheapest month for flights from Seattle-Tacoma International Airport to Logan International Airport is May. Use the 'Whole month' tool to see the lowest prices if you have a flexible travel schedule.

  • Getting your hands on cheap flights from SEA to BOS is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you as soon as there's a better deal.

  • Tailor your flights using filters. Pick your arrival and departure times, airlines and total journey duration. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest' flights from Seattle-Tacoma International Airport to Logan International Airport.

Handy information about Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport has a strong on-time record, reducing the likelihood of delays. Departures from SEA arrive at their destination as scheduled 81.27% of the time.

  • Central Seattle to Seattle-Tacoma International Airport is approximately 23 kilometres. Depending on traffic, it'll take you about 20 minutes to get there if you're driving, ride-sharing or catching a cab.

  • Expect a journey time of roughly 55 minutes on public transport.

  • Get your break off to a stress-free start by staying near SEA. Whether you've booked an early flight from Seattle-Tacoma International Airport to Logan International Airport or just don't want to be rushed, these stays have you covered:

Arriving at Logan International Airport (BOS)

Getting from Logan International Airport (BOS) to central Boston

  • You'll find BOS at One Harborside Drive.

  • Logan International Airport is approximately 5 kilometres from central Boston. Driving there takes about 10 minutes.

  • It takes roughly 25 minutes to get there by public transport.

When to fly to Logan International Airport (BOS)

  • It's time to work out your travel dates for your flight from Seattle-Tacoma International Airport to Logan International Airport. August is the busiest month to head to Boston. If you want a more low-key vibe, go in May.

  • Book your flight from Seattle-Tacoma International Airport to Logan International Airport for July if you want to visit Boston during its warmest month. Expect temperatures of between 16ºC and 29ºC.

  • If you like cooler conditions, search for a cheap ticket from SEA to BOS in January. Temperatures average between -8ºC and 6ºC then.

Explore more of United States

  • Boston has plenty going for it, but there are so many other parts of United States just waiting to be discovered. About 306 kilometres south-west of Boston, a visit to New York will keep your itinerary busy. Start with leading sights like Statue of Liberty, Central Park and Empire State Building.

  • Philadelphia is another well-known destination in United States and is around 434 kilometres south-west of Boston. No journey is complete without a visit to Liberty Bell, Independence Hall and Philadelphia Museum of Art.

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