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Cheap flights from Boston to Seattle

BOS — SEA
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in January or March, booked 31 days in advance, depart on a Thursday or Tuesday and return on a Monday

Cheap flight deals from Boston to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Seattle (SEA). 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 18 September 2025.

Popular in

August

Cheapest in

January

Average price

₹ 29,594

Good round-trip deal

₹ 22,971 or less

Good one-way deal

₹ 16,385 or less
Highest demand for flights based on searches. 14% potential increase in price (₹ 438,212 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (₹ 63,562 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Boston Logan Intl to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Boston Logan Intl to Seattle/Tacoma Intl.
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Best time to book a flight from Boston to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Seattle

How far ahead should I book a flight from Boston to Seattle?

Use this chart to determine the optimal time to book a return flight from Boston to Seattle. Price data was last updated on 12 September 2025.

Booking 31 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Boston to Seattle?

Currently, October is the cheapest month in which you can book a flight from Boston to Seattle (average of ₹ 984). Flying from Boston to Seattle in August is currently the most expensive (average of ₹ 1,281). 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 BOS to SEA?

Find hourly flight availability from Boston to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

It’s typically best to fly out from Boston to Seattle at midday. Doing so could potentially save you 36% on the flight price compared to flying in the morning, which is usually more expensive.

Related info for your journey

Find useful and relevant information for your journey from Boston to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Boston to Seattle flight route?

    Within the past month, 8 users have taken a look at flights from Boston Logan Intl to Seattle/Tacoma Intl.

  • What are the most reliable airlines from Boston to Seattle?

    Consider LATAM Airlines (90%), Delta (86%) or Virgin Atlantic (86%) when booking your flight. These represent the most reliable airlines when flying from Boston to Seattle.

  • Can I find deals for flights from Boston to Seattle that include hotel bookings?

    Yes. In addition to deals on Boston to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Seattle.

  • Can I find deals for business class flights from Boston to Seattle?

    Yes. Cheapflights offers flight deals from Boston to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Seattle?

    Currently, October is the cheapest month in which you can book a flight from Boston to Seattle (average of ₹ 984). Flying from Boston to Seattle in August is currently the most expensive (average of ₹ 1,281). 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.

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Need flexible booking options for your flight to Seattle from Boston? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Boston to Seattle become cheaper?

Not ready to book yet? You can track prices for flights from Boston to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.

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