Cheap Flights from Boston to Seattle Starting at $159
Helping travelers to find the best flight offers
Cheapest flights from Boston to Seattle
Fly from Boston to Seattle with confidence — our search scans over 700 airlines, more than 50 agencies, and 5+ top booking systems to uncover the best prices, schedules, and travel conditions for your trip. Compare nonstop and connecting options in seconds and lock in the itinerary that fits your timing and budget.
Remember that on average the ideal time to book flights is 2 months before departure!
A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Boston to Seattle:
Boston airports overview
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Seattle airports overview
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Frequently asked questions (FAQ)
Answers to questions about the route that travelers are most interested in.
Special offers and sales on air tickets from Boston to Seattle
We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
Alternative routes
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Cheapest one way flight
$159
Alaska Airlines
Direct flight
6h 33m
03/15/2026
The cheapest one-way flight from Boston to Seattle departs on 03/15/2026, is operated by Alaska Airlines and costs $159
Cheapest round trip flight
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There is no information about the cheapest roundtrip flight from Boston to Seattle
The fastest flight
6h 33m
Fastest flight from Boston to Seattle takes 6h 33m
Direct flights
Once a week
There are direct flights on this route 1 day a week: Su
Earliest flight
7:00 AM
Latest flight
6:55 PM
Direct flights count
97
Distance
3999km
Timezone difference
3h
The distance between Boston and Seattle is 3999km (2479 miles). There are 97 direct flights from Boston to Seattle. The time difference between Boston and Seattle is 3h. Flights from Boston begin at 7:00 AM. The latest flight from Boston departs at 6:55 PM
Unable to find information about the schedule of direct flights from
Boston Logan International (BOS) is the city’s main international gateway and a full-service hub for legacy carriers while also handling many low-cost flights, making it a common choice for both business and leisure travelers. Located about 3–5 miles from downtown Boston, Logan is reachable by the MBTA Blue Line and Silver Line buses in roughly 20–30 minutes (fares typically under $5), as well as by taxis and rideshares that can take 10–25 minutes depending on traffic and cost more. Pros: frequent flights, international connections and on-site amenities; cons: can be busy at peak times and ground transport may be affected by congestion or higher fees for some services.
Fly nonstop from Boston to Seattle for the fastest, most convenient way to cross the country—perfect when you value time and comfort. While connecting options can sometimes be cheaper, a direct flight gets you to the Pacific Northwest sooner and with fewer hassles, making it ideal for business trips or weekend escapes.
On the Boston — Seattle route, flights are operated only by Alaska Airlines. This simplifies the choice for passengers, as all tickets come from a single trusted carrier. Our service lets you instantly check fares for upcoming dates and find the most advantageous option. The minimum ticket price starts at $159, making this trip affordable for a wide range of travelers. To save even more, we recommend booking early and keeping an eye on promotions — Alaska Airlines regularly offers special deals.
We couldn't find any special offers for flights from Boston to Seattle
Seattle-Tacoma International Airport (SEA) is the primary international gateway for the Seattle region, functioning as a major hub for full-service carriers and offering a wide range of domestic and transpacific routes. Carriers typically include legacy airlines and several international operators, while low-cost carriers also serve many domestic routes. SEA sits about 14 miles (22 km) south of downtown Seattle; travel times are commonly 20–35 minutes by Link light rail or 20–45 minutes by taxi/rideshare depending on traffic. Public transit fares tend to be modest, with rideshares and taxis costing more. Pros: frequent flights, good amenities and direct connections; cons: can be busy during peak times and security lines may be long.
January 2026
Lowest price
on average:
$242
Avg Price
How much is the cheapest flight ticket from Boston to Seattle?
The cheapest flight ticket from Boston to Seattle according to data for the last 48 hours costs $159
When is the best time to buy air tickets on the route Boston — Seattle?
Often the best time to buy tickets from Boston to Seattle is 2 months before departure.
When is the cheapest time of year to fly from Boston to Seattle?
Based on statistics over the past years, the lowest prices for flights from Boston to Seattle can be found flying in these months: January.
How long does it take to fly from Boston to Seattle?
The fastest flights from Boston to Seattle start from 6 hours 33 minutes in the air.
Which airline can fly direct from Boston to Seattle?
The following airlines operate direct flights on the route Boston — Seattle: Alaska Airlines
We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Boston to Seattle
