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Cheap flights from Seattle to Boston from C$ 170

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or February, booked 87 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

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 25 March 2025.

Round-trip from

C$ 340

One-way from

C$ 170

Popular in

July

Cheapest in

January

Average price

C$ 410

Good round-trip deal

C$ 198 or less

Good one-way deal

C$ 312 or less
Hawaiian Airlines
  • Hawaiian Airlines
  • 1/5-4/5
  • Nonstop
  • 11h 36m total
  • Seattle to Boston
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JetBlue
  • JetBlue
  • 29/5
  • Nonstop
  • 5h 32m total
  • Seattle to Boston
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Highest demand for flights based on searches. 27% potential increase in price (C$ 287 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 32 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Boston Logan Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Boston Logan Intl.
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Find flight deals from Seattle to Boston

Cheapest flights from Seattle to Boston
Explore the most affordable flight options available from Seattle to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 March 2025.

Thu 1/53:49 p.m.SEA - BOS
Nonstop5h 23mHawaiian Airlines
Sun 4/57:00 a.m.BOS - SEA
Nonstop6h 13mHawaiian Airlines
Deal found 25/3C$ 340
Thu 1/59:23 p.m.SEA - BOS
1 stop9h 09mJetBlue
Sun 4/57:10 a.m.BOS - SEA
Nonstop6h 18mJetBlue
Deal found 25/3C$ 354
Thu 29/51:49 p.m.SEA - BOS
1 stop8h 10mUnited Airlines
Tue 3/67:00 p.m.BOS - SEA
1 stop8h 59mUnited Airlines
Deal found 24/3C$ 361
Tue 20/55:59 p.m.SEA - BOS
1 stop10h 41mAlaska Airlines
Thu 29/54:49 p.m.BOS - SEA
1 stop10h 08mAlaska Airlines
Deal found 24/3C$ 367
Wed 7/510:11 p.m.SEA - BOS
Nonstop5h 29mDelta
Wed 21/57:07 p.m.BOS - SEA
Nonstop6h 14mDelta
Deal found 24/3C$ 382
Fri 22/85:00 a.m.SEA - BOS
2 stops9h 55mSouthwest
Mon 25/85:35 a.m.BOS - SEA
2 stops11h 20mSouthwest
Deal found 24/3C$ 576
Thu 17/46:33 p.m.SEA - BOS
1 stop26h 01mSun Country Air
Sun 20/411:38 a.m.BOS - SEA
1 stop8h 47mSun Country Air
Deal found 25/3C$ 652

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 25 March 2025.
Use the filters below to find and compare flights from Seattle to Boston that are best for you.

Fly from

Seattle

Fly to

Boston

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 1/5

3:49 p.m.-12:12 a.m.

Nonstop5h 23m

Boston Logan Intl

Sun 4/5

7:00 a.m.-10:13 a.m.

Nonstop6h 13m

C$ 340

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 1/5

9:23 p.m.-9:32 a.m.

1 stop9h 09m

Boston Logan Intl

Sun 4/5

7:10 a.m.-10:28 a.m.

Nonstop6h 18m

C$ 354

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 29/5

1:49 p.m.-12:59 a.m.

1 stop8h 10m

Boston Logan Intl

Tue 3/6

7:00 p.m.-12:59 a.m.

1 stop8h 59m

C$ 361

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 20/5

5:59 p.m.-7:40 a.m.

1 stop10h 41m

Boston Logan Intl

Thu 29/5

4:49 p.m.-11:57 p.m.

1 stop10h 08m

C$ 367

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 7/5

10:11 p.m.-6:40 a.m.

Nonstop5h 29m

Boston Logan Intl

Wed 21/5

7:07 p.m.-10:21 p.m.

Nonstop6h 14m

C$ 382

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 22/8

5:00 a.m.-5:55 p.m.

2 stops9h 55m

Boston Logan Intl

Mon 25/8

5:35 a.m.-1:55 p.m.

2 stops11h 20m

C$ 576

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 17/4

6:33 p.m.-11:34 p.m.

1 stop26h 01m

Boston Logan Intl

Sun 20/4

11:38 a.m.-5:25 p.m.

1 stop8h 47m

C$ 652

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 29/5

11:38 a.m.-8:10 p.m.

Nonstop5h 32m

C$ 170

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 27/5

4:16 p.m.-7:40 a.m.

1 stop12h 24m

C$ 183

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 4/5

8:56 p.m.-8:14 p.m.

2 stops20h 18m

C$ 186

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/3

Showing 1-10 of 16 results
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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.
Estimated round-trip 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 Seattle to Boston

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Boston. Price data was last updated on 21 March 2025.

Booking 87 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Boston. 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 Seattle to Boston?

Currently, January is the cheapest month in which you can book a flight from Seattle to Boston (average of C$ 298). Flying from Seattle to Boston in April is currently the most expensive (average of C$ 350). 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?

Find hourly flight availability from Seattle to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 March 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Boston at noon. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the morning.

Weekly flight availability from Seattle to Boston

Explore weekly flight availability from Seattle to Boston. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 25 March 2025.

The most flights from SEA to BOS are scheduled on a Sunday (31 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Boston by month

Plan your trip to Boston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boston ranges from 78.0 - 101.0 mm per month. March is typically the wettest month, when rainfall can reach 101.0 mm. July is typically the driest time to visit Boston when rainfall is around 78.0 mm.

Temperature in Boston by month

Plan your trip to Boston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated 25 March 2025.
To help decide which airline to fly from Seattle to Boston, see what other customers have to say about Alaska Airlines, Southwest and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Alaska Airlines
8.0
Very good
9,782 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Hawaiian Airlines
7.9
Good
2,330 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies

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.

  • What airports do I use to fly from Seattle to Boston?

    Booking a flight from Seattle/Tacoma Intl (SEA) to Boston Logan Intl (BOS) is your only option if you wish to fly from Seattle to Boston. On a typical day, there are 26 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 22m for a nonstop flight. You can also purchase a plane ticket from 3 airlines when you book a flight from Seattle/Tacoma Intl to Boston.

  • How popular is this Seattle to Boston flight route?

    The Seattle/Tacoma Intl to Boston Logan Intl flight path was viewed by 49 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Seattle to Boston round-trip?

    Hawaiian Airlines, at C$ 340, was found to be the cheapest airline from Seattle to Boston.Alternate airlines to your destination round-trip include JetBlue and United Airlines. You may be able to fly from Seattle to Boston for 37% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Seattle to Boston one-way?

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as C$ 170. However, be on the lookout for offers from Hawaiian Airlines and Spirit Airlines, as they are both options that can get you from Seattle to Boston for a low price.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Boston on time: EL AL (92%), Qatar Airways (92%), Delta (91%).

  • What are the cheapest flights from Seattle to Boston?

    While on average a flight from Seattle to Boston is generally C$ 297, our data shows the cheapest flight currently is C$ 141. When looking at the most popular route, (Seattle/Tacoma Intl - Boston Logan Intl), you can expect to pay C$ 511 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Boston 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 Seattle to Boston?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Boston (average of C$ 298). Flying from Seattle to Boston in April is currently the most expensive (average of C$ 350). 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.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Seekonk
Waltham
Warwick
Medford
Braintree
Somerville
Dedham
Rockland
Chelsea
Plymouth
Quincy
Old Orchard Beach
Revere
Hampton
Lynn
Andover
Watertown
Kennebunk
Amherst
Sturbridge

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Seattle to Boston

Discover the top 3 airlines that operate flights from Seattle to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 142AverageC$ 467FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
JetBlueCheapestC$ 184AverageC$ 354FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Alaska AirlinesCheapestC$ 204AverageC$ 585FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from Seattle to Boston 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 Seattle to Boston?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Boston.

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

Yes! Cheapflights helps users easily find flights from Seattle to Boston with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Boston from Seattle today and book when prices fit your budget.

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