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Cheap flights from Seattle to Boston from C$ 142

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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
28 Jan — 4 Feb1
1 adult

The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or February, booked 38 days in advance, depart on a Thursday or Tuesday and return on a Friday

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 23 January 2025.

Round-trip from

C$ 283

One-way from

C$ 142

Popular in

July

Cheapest in

January

Average price

C$ 311

Good round-trip deal

C$ 396 or less

Good one-way deal

C$ 119 or less
Delta
  • Delta
  • 6/2-12/2
  • Nonstop
  • 12h 01m total
  • Seattle to Boston
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Delta
  • Delta
  • 15/2
  • Nonstop
  • 5h 26m total
  • Seattle to Boston
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (C$ 283 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 January 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 23 January 2025.

Thu 6/27:30 a.m.SEA - BOS
Nonstop5h 29mDelta
Wed 12/27:10 a.m.BOS - SEA
Nonstop6h 35mDelta
Deal found 21/1C$ 283
Thu 6/23:20 p.m.SEA - BOS
Nonstop5h 10mJetBlue
Wed 12/210:45 a.m.BOS - SEA
Nonstop6h 25mJetBlue
Deal found 21/1C$ 286
Thu 6/28:59 p.m.SEA - BOS
1 stop15h 30mAlaska Airlines
Sun 9/27:00 a.m.BOS - SEA
Nonstop6h 38mAlaska Airlines
Deal found 22/1C$ 297
Sun 16/23:45 p.m.SEA - BOS
Nonstop5h 14mMultiple Airlines
Tue 18/26:00 a.m.BOS - SEA
2 stops21h 25mMultiple Airlines
Deal found 21/1C$ 331
Thu 6/211:05 a.m.SEA - BOS
2 stops9h 54mUnited Airlines
Fri 7/29:30 a.m.BOS - SEA
1 stop9h 46mUnited Airlines
Deal found 22/1C$ 376
Thu 13/29:05 a.m.SEA - BOS
1 stop6h 55mSouthwest
Tue 18/27:20 a.m.BOS - SEA
2 stops13h 50mSouthwest
Deal found 20/1C$ 462
Sun 16/25:15 a.m.SEA - BOS
2 stops14h 08mSpirit Airlines
Tue 18/26:00 a.m.BOS - SEA
2 stops21h 25mSpirit Airlines
Deal found 21/1C$ 518
Mon 30/611:59 p.m.SEA - BOS
1 stop7h 38mSun Country Air
Mon 7/76:30 a.m.BOS - SEA
1 stop28h 32mSun Country Air
Deal found 21/1C$ 538
Sun 16/23:45 p.m.SEA - BOS
Nonstop5h 14mAmerican Airlines
Tue 18/25:24 a.m.BOS - SEA
1 stop10h 41mAmerican Airlines
Deal found 21/1C$ 594

Find flights from Seattle to Boston within your budget

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 23 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 6/2

7:30 a.m.-3:59 p.m.

Nonstop5h 29m

Boston Logan Intl

Wed 12/2

7:10 a.m.-10:45 a.m.

Nonstop6h 35m

C$ 283

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 6/2

3:20 p.m.-11:30 p.m.

Nonstop5h 10m

Boston Logan Intl

Wed 12/2

10:45 a.m.-2:10 p.m.

Nonstop6h 25m

C$ 286

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 6/2

9:59 p.m.-3:29 p.m.

1 stop14h 30m

Boston Logan Intl

Sun 9/2

7:00 a.m.-10:38 a.m.

Nonstop6h 38m

C$ 297

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 16/2

3:45 p.m.-11:59 p.m.

Nonstop5h 14m

Boston Logan Intl

Tue 18/2

6:00 a.m.-12:25 a.m.

2 stops21h 25m

C$ 331

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 6/2

7:00 a.m.-5:23 p.m.

1 stop7h 23m

Boston Logan Intl

Sat 8/2

2:00 p.m.-11:09 p.m.

2 stops12h 09m

C$ 376

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 13/2

9:05 a.m.-7:00 p.m.

1 stop6h 55m

Boston Logan Intl

Tue 18/2

7:20 a.m.-6:10 p.m.

2 stops13h 50m

C$ 462

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 16/2

5:15 a.m.-10:23 p.m.

2 stops14h 08m

Boston Logan Intl

Tue 18/2

6:00 a.m.-12:25 a.m.

2 stops21h 25m

C$ 518

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 30/6

11:59 p.m.-10:37 a.m.

1 stop7h 38m

Boston Logan Intl

Mon 7/7

6:30 a.m.-8:02 a.m.

1 stop28h 32m

C$ 538

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 16/2

3:45 p.m.-11:59 p.m.

Nonstop5h 14m

Boston Logan Intl

Tue 18/2

5:24 a.m.-1:05 p.m.

1 stop10h 41m

C$ 594

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 15/2

11:48 p.m.-8:03 a.m.

Nonstop5h 15m

C$ 142

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/1

Showing 1-10 of 17 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.

Travel insights for flights from Seattle to Boston

Get recent, data-driven insights about flights from Seattle to Boston including ideal travel times, pricing trends, and more.

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 17 January 2025.

Booking 38 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 23 January 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Boston in the morning. If you’re flexible enough to do this you can expect to save up to 33% on your trip compared to booking a flight in the afternoon.

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 23 January 2025.

The most flights from SEA to BOS are scheduled on a Monday (22 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (11 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 23 January 2025.
To help decide which airline to fly from Seattle to Boston, see what other customers have to say about Alaska Airlines, United Airlines and JetBlue. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,654 reviews
Check prices

Food

7.2

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,654 reviews
Southwest
8.1
Very good
4,654 reviews
Check prices

Food

7.2

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,707 reviews
Southwest
8.1
Very good
4,654 reviews
Check prices

Food

7.2

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,512 reviews
Southwest
8.1
Very good
4,654 reviews
Check prices

Food

7.2

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,191 reviews
Southwest
8.1
Very good
4,654 reviews
Check prices

Food

7.2

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,975 reviews
Southwest
8.1
Very good
4,654 reviews
Check prices

Food

7.2

Boarding

8.2

Comfort

8.1

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 16 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 26m 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 61 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?

    Delta, at C$ 283, was found to be the cheapest airline from Seattle to Boston.Alternate airlines to your destination round-trip include JetBlue and Alaska Airlines. You may be able to fly from Seattle to Boston for 47% 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 Delta, with whom users have recently found tickets for as low as C$ 142. However, be on the lookout for offers from Spirit Airlines and JetBlue, 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: KLM (100%), EL AL (96%), Condor (91%).

  • What are the cheapest flights from Seattle to Boston?

    While on average a flight from Seattle to Boston is generally C$ 546, our data shows the cheapest flight currently is C$ 119. When looking at the most popular route, (Seattle/Tacoma Intl - Boston Logan Intl), you can expect to pay C$ 326 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
Warwick
Waltham
Medford
Braintree
Somerville
Dedham
Rockland
Chelsea
Plymouth
Old Orchard Beach
Revere
Quincy
Hampton
Lynn
Andover
Watertown
Kennebunk
Amherst
Sturbridge

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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 23 January 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapestC$ 176AverageC$ 396FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Alaska AirlinesCheapestC$ 212AverageC$ 540FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapestC$ 220AverageC$ 382FlexibilityNo cancel feeOn-timeN/A
Search Delta 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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