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Cheap Flight Deals from Seattle to Boston

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Round TripOne Way
SEA Seattle
BOS Boston
From $279.99
Jan 26, 2026 - Feb 25, 2026
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SEA Seattle
BOS Boston
From $563.99
Jun 1, 2026 - Jul 20, 2026
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*All fares above were last found on:
Fares are one way/round trip. Fares incl. all fuel surcharges, taxes & fees and our service fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions.

When’s a good time to book a flight from Seattle to Boston?

What’s the cheapest day of the week to fly from Seattle to Boston?‡

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

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‡This information is based on historical data from the last 365 days.

Finding Affordable Flights from Seattle to Boston
  • Plan Ahead - One of the keys to securing cheap flights from Seattle to Boston is to plan your trip well in advance. Airlines often offer lower prices for those who book tickets months ahead. Keep an eye on special promotions and sales events, which can yield significant savings.
  • Flexibility is Key - Being flexible with your travel dates can also lead to substantial cost savings. Consider flying during off-peak seasons or on weekdays when prices tend to be lower.
  • Set Price Alerts - To keep tabs on flight prices, consider setting up fare alerts. These alerts will notify you when fares from Seattle to Boston drop, giving you the opportunity to grab cheap deals.
  • Consider Nearby Airports - If Boston has multiple airports, check the prices at each one. Sometimes, flying into a nearby airport and then taking a short train or bus ride to your destination can be a much cheaper option.
  • Bundle and Save - Booking your flight and accommodation together as a package can often result in significant savings. CheapOair offers these bundled deals, so make sure to explore this option.

When is the Cheapest Time to Book Flights from Seattle to Boston?

‡

Got flexible travel dates? Use our flight data from the past year to discover ideal times to fly from Seattle to Boston. Find out which months and days typically offer lower fares and score our best savings.

CheapOair provides the predicted prices for one-way trips or round-trips with a duration of 7 days for domestic and 14 days for international trips based on historical data and available flight information. Graphs are estimates only. Prices are subject to change and can't be guaranteed until ticketed.
Estimated price for
Round-trip

‡Graphs are estimates only. Based on historical data and available flight information. Prices are subject to change and cannot be guaranteed until ticketed.

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Seattle to Boston Flight Route Information

Travel Distance:2,490 Miles
Airlines Flying This Route: Alaska Airlines, JetBlue Airways, Qatar Airways
Weekly Flights:53
Avg. Flight Duration:5.15 Hours

Insights About Flying from Seattle to Boston

Q. Which is the high season to travel from Seattle to Boston?

A. The month of October is considered the high season for flying from SEA to BOS. Traveling during the high season can affect ticket prices and availability, making this data crucial for trip planning.

Q. How many direct flights are available from SEA to BOS?

A. There are a total of 212 direct flights from Seattle to Boston. For travelers seeking convenience and shorter travel times, this data is important when choosing flight options.

Q. Which is the low season to travel from Seattle to Boston?

A. April is considered the low season for traveling from Seattle to Boston, Massachusetts. Travelers looking for cost-effective options and fewer crowds may consider traveling during this period.

Q. How many daily flights are there between Seattle to Boston?

A. There are as many as 7 daily flights available for travelers between SEA to BOS. This data offers flexibility in choosing departure times that best suit your schedule.

Q. Which is the busiest day for passengers flying between Seattle to Boston?

A. Monday are the busiest days for passengers flying between Seattle to Boston. Knowing the peak travel day can help you plan your trip to avoid overcrowded flights or airports.

Q. At what time does the last flight depart to Boston?

A. The last flight to Boston typically departs between 11:00PM - 12:00AM. Travelers who prefer late-night departures will find this information valuable for planning their journey.

Q. What percentage of travelers spent an average of 2 days in Boston, Massachusetts?

A. Approximately 37.89% of travelers spent an average of 2 days exploring Boston. This information can assist in planning the duration of your stay in Boston

Q. What percentage of SEA to BOS flyers traveled with kids under 14?

A. About 7% of passengers on flights from Seattle to Boston were accompanied by children under the age of 14. This information is useful if you're planning a family trip and want to know how common it is to travel with young children on this route.

Q. What percentage of Seattle to Boston travelers were over 60 years old?

A. A notable 16% of travelers were aged 60 or older. This statistic provides insights for senior travelers or those seeking a mature travel demographic.

Q. What percentage of SEA to BOS travelers were millennials?

A. Millennials make up a significant portion of travelers on this route, accounting for 38% of all passengers. If you're a millennial looking to connect with like-minded travelers, this statistic might interest you.

Q. What percentage of Seattle to Boston travelers were female?

A. Almost half of the passengers, approximately 42% were female. Knowing the gender distribution can be useful for solo female travelers or those interested in gender-related travel insights.

Q. What percent of Seattle to Boston travellers booked first or business class?

A. 3% of travelers booked first or business class on this route.

Q. At what time the earliest flight departs from Seattle?

A. The earliest flight departs at 7:00AM - 8:00AM.

Q. On which days one can have the most flight options in Boston?

A. Monday offer the most flight options in Boston.

§ All flight facts are based on last 3 months' data except the highest and lowest booking months that are based on last 3 months' data.

Cheap Flights from Seattle to Boston

Looking for flights from Seattle to Boston? Look no more, for you're at the right place. Book cheap flights from Seattle to Boston on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world. Grab SEA to BOS flight deals on CheapOair and save big!

Airports in Seattle

Seattle-Tacoma International Airport is a primary international airport serving the city of Seattle, Washington, U.S.A. It is situated approximately 21 kilometers away from Downtown Seattle. This public airport is owned & managed by Port of Seattle. The airport is a hub for Alaska Airlines, Delta Air Lines, and Horizon Air. It offers passenger & cargo services to both domestic & international destinations. These destinations are Vancouver, Tokyo, Seoul, Victoria, Taipei, Amsterdam, Dubai, Anchorage, San Francisco, Portland, and more. Buses, shuttles, public transit, rental cars, taxis, limos, Uber, Lyft, Wingz, and more connect the airport to the city.

Explore Boston

Boston is the capital city of Massachusetts, U.S.A. It is also the most populated municipality in the state. The city is known for the historical sites related to colonial and Revolutionary War era such as Freedom Trail, Beacon Hill, the North End, and more. Situated within the city are various museums allowing visitors to explore the art & culture of the city. These include the Boston Museum of Fine Arts, Public Art Walk, Boston's Dreamland Wax Museum, Commonwealth Museum, and more. If you are visiting the city with family & children then do add Boston's Children Museum, Edaville Theme Park, New England Aquarium, or more to your list.

Things to Do in Boston

Isabella Stewart Gardner Museum

The Isabella Stewart Gardner Museum houses a significant collection of art. Here one can see the examples of European, Asian, and American art in the form of paintings, sculpture, tapestries, and decorative art pieces. The museum features work by various artists including Rembrandt, Michelangelo, Raphael, Degas, and Sargent.

New England Aquarium

The New England Aquarium of Boston offers true aquatic experience as it is situated on the harbor. It serves as a home to various species of aquatic life. These include seals, penguins, green sea turtle, Myrtle, batfish, dwarf sea horses, eels, sharks, rays, sea star, lobster, crab, sea dragons, and more. The aquarium comprises of Atlantic Harbor Seals, Giant Ocean Tank, Yawkey Coral Reef Center, Shark and Ray Touch Tank, Edge of the Sea's, and more where these different aquatic animals have been kept.

The Museum of Fine Arts

The Museum of Fine Arts is amongst the great art museums of the world. It has masterpieces from around the world and has more Monets than any museum outside of Paris. The collection here includes treasures from Egypt and the ancient world, American art from colonial to modern times, and Japanese art collection.

Best Time to Fly to Boston

The best time to visit the city of Boston is between the months of June-October. The weather in the city remains pleasant during these months and roaming in the city is a joy. Avoid visiting here during summers as the city gets crowded with tourist and prices may inflate unreasonably.

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