Cheap flights from Boston to Seattle

4 Oct — 11 Oct1
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How to find the cheapest flight from Boston (BOS) to Seattle (SEA)

All the information you need to plan the best BOS to SEA flight in 2023: compare Boston to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.

Popular in


Cheapest in


Average price

₹ 32,259

Round-trip from

₹ 8,271,339
High demand for flights, 38% potential price rise
Best time to find cheap flights, 46% potential price drop
Average for round-trip flights in September 2023
From Boston Logan Intl to Seattle/Tacoma Intl



₹ 99,484 - ₹ 169,708



5 - 19 °C



18 - 168 mm

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 31 days in advance, which can save you up to 37% on flights from Boston to Seattle compared to booking the week you need them. Waiting 31 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at ₹ 35,917. For sooner than that we have options available in the next 3 days from ₹ 45,479.

What is the cheapest month to fly from Boston to Seattle?

Our data shows that January tends to be the cheapest month to fly to Seattle from Boston. Users have commonly found prices around ₹ 33,361 for the month, but tickets can be as low as ₹ 15,963. Due to multiple factors, prepare for potentially higher prices in June.

When is the cheapest time to fly from Boston to Seattle (BOS - SEA)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to Seattle as you normally would.

Related info for your journey

Useful info, stats and facts about Boston to Seattle flights.

What days are direct flights available from Boston to Seattle?

You can find direct flights on the following days: Sunday, Monday, Tuesday, Wednesday, Friday, Saturday.

How many flights depart from Boston to Seattle on average per day?

On average 18 flights depart from Boston to Seattle per day.
Morning (6am - Noon) - 28% of flight departures
Afternoon (Noon - 6pm) - 11% of flight departures
Evening (6pm - Midnight) - 61% of flight departures

What are the most reliable airlines from Boston to Seattle?

Consider LATAM Airlines (96%), China Eastern (92%) or Virgin Atlantic (83%) when booking your flight. These represent the most reliable airlines when flying from Boston to Seattle.

What does BOS to SEA mean?

Great question - BOS to SEA just means Boston Logan Intl Airport to Seattle/Tacoma Intl Airport. Now you’ll know what these unique codes when you look for flights!

Hourly flight availability from Boston to Seattle

See what time of day planes typically take off from Boston to Seattle
10%of flight departuresEarly morningMidnight to 6 am
47%of flight departuresMorning6 am to noon
41%of flight departuresAfternoonNoon to 6 pm
2%of flight departuresEvening6 pm to midnight
6 AM
6 PM

Weekly flight availability from Boston to Seattle

See how many times per day planes take to the skies headed from Boston to Seattle
Monday23daily flights
Tuesday25daily flights
Wednesday21daily flights
Thursday22daily flights
Friday25daily flights
Saturday20daily flights
Sunday22daily flights

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How does Cheapflights help users find flights from Boston to Seattle?

Cheapflights helps you search for flights from Boston to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Boston to Seattle?

Millions of users choose and trust Cheapflights to book the best flight deals from Boston to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Boston to Seattle with no change fees?

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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