Cheap flights from Seattle to Boston
Cheap flight deals from Seattle to Boston
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 August 2025.
Popular in | December |
|---|---|
Cheapest in | January |
Average price | £325 |
Best time to book a flight from Seattle to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Seattle with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Boston
How far ahead should I book a flight from Seattle to Boston?
The best time to book flights from Seattle to Boston is 52 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Seattle to Boston?
Currently, October is the cheapest month in which you can book a flight from Seattle to Boston (average of £10). Flying from Seattle to Boston in July is currently the most expensive (average of £724). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SEA to BOS?
Unlike at midday, when flights are generally more expensive, you can save up to 32% on flights from Seattle to Boston by exploring options for tickets in the afternoon.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Boston?
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Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 22 August 2025.
Fly with Cheapflights
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How does Cheapflights help users find flights from Seattle to Boston?
Deals for Seattle to Boston flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Boston?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Boston from Seattle.
Can Cheapflights find flights from Seattle to Boston with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Boston, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Seattle to Boston become cheaper?
Not ready to book yet? You can track prices for flights from Seattle to Boston on Cheapflights with our Price Alert feature and get notified when better prices are available.