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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 14/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
29 Dec — 5 Jan1
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 Sunday or Monday and return on a Wednesday

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 24 December 2024.

Round-trip from

C$ 283

One-way from

C$ 142

Popular in

July

Cheapest in

January

Average price

C$ 656
Delta
  • Delta
  • 9/1-18/1
  • Nonstop
  • 12h 04m total
  • Seattle to Boston
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Delta
  • Delta
  • 14/1
  • Nonstop
  • 5h 29m total
  • Seattle to Boston
Search Deals
High demand for flights, 26% potential price rise
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Best time to find cheap flights, 4% potential price drop
Search Deals
Average for round-trip flights in December 2024
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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 24 December 2024.

Mon 30/129:10 p.m.SEA - BOS
Nonstop5h 20mAlaska Airlines
Sat 11/15:55 p.m.BOS - SEA
Nonstop6h 39mAlaska Airlines
Deal found 22/12C$ 413
Mon 30/125:30 a.m.SEA - BOS
1 stop8h 22mDelta
Thu 9/17:10 a.m.BOS - SEA
Nonstop6h 35mDelta
Deal found 22/12C$ 528
Mon 30/127:10 p.m.SEA - BOS
1 stop7h 47mUnited Airlines
Mon 6/14:53 p.m.BOS - SEA
1 stop9h 24mUnited Airlines
Deal found 23/12C$ 533
Sat 28/121:50 p.m.SEA - BOS
Nonstop5h 07mJetBlue
Fri 3/19:16 a.m.BOS - SEA
Nonstop6h 22mJetBlue
Deal found 24/12C$ 585
Wed 25/128:25 a.m.SEA - BOS
1 stop12h 15mSouthwest
Sun 5/17:10 p.m.BOS - SEA
1 stop8h 40mSouthwest
Deal found 22/12C$ 799
Thu 26/1211:59 p.m.SEA - BOS
1 stop20h 10mSun Country Air
Mon 30/1211:46 a.m.BOS - SEA
1 stop25h 49mSun Country Air
Deal found 23/12C$ 942
Mon 30/1212:31 a.m.SEA - BOS
1 stop7h 55mAmerican Airlines
Sun 5/17:25 a.m.BOS - SEA
1 stop10h 25mAmerican Airlines
Deal found 22/12C$ 2,338

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 24 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 9/1

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

Nonstop5h 29m

Boston Logan Intl

Sat 18/1

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

Nonstop6h 35m

C$ 283

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 9/1

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

Nonstop5h 10m

Boston Logan Intl

Wed 15/1

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

Nonstop6h 25m

C$ 285

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 23/1

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

Nonstop5h 14m

Boston Logan Intl

Wed 29/1

5:24 p.m.-9:30 a.m.

1 stop19h 06m

C$ 296

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 11/1

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

2 stops9h 23m

Boston Logan Intl

Thu 16/1

8:00 a.m.-3:45 p.m.

1 stop10h 45m

C$ 375

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 6/1

2:16 p.m.-12:34 p.m.

2 stops19h 18m

Boston Logan Intl

Mon 13/1

7:13 a.m.-12:19 a.m.

3 stops44h 06m

C$ 427

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 8/1

7:30 a.m.-9:40 p.m.

2 stops11h 10m

Boston Logan Intl

Tue 14/1

2:05 p.m.-10:40 p.m.

1 stop11h 35m

C$ 433

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 17/4

6:20 p.m.-11:34 p.m.

1 stop26h 14m

Boston Logan Intl

Mon 21/4

11:31 a.m.-5:19 p.m.

1 stop8h 48m

C$ 633

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 14/1

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

Nonstop5h 29m

C$ 142

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 5/2

12:45 a.m.-1:37 p.m.

1 stop9h 52m

C$ 157

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 24/2

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

Nonstop5h 15m

C$ 171

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/12

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.

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 20 December 2024.

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 24 December 2024.

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 24 December 2024.

The most flights from SEA to BOS are scheduled on a Monday (29 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (13 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 24 December 2024.
To help decide which airline to fly from Seattle to Boston, see what other customers have to say about Alaska Airlines, United Airlines and Southwest. 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
4,765 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

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
4,765 reviews
Southwest
8.1
Very good
4,765 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

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
9,555 reviews
Southwest
8.1
Very good
4,765 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

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
8,580 reviews
Southwest
8.1
Very good
4,765 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

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
3,260 reviews
Southwest
8.1
Very good
4,765 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

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
9,009 reviews
Southwest
8.1
Very good
4,765 reviews
Check prices

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

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 19 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 20m 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 American Airlines and United 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: KLM (100%), EL AL (100%), LATAM Airlines (100%).

  • What are the cheapest flights from Seattle to Boston?

    While on average a flight from Seattle to Boston is generally C$ 539, our data shows the cheapest flight currently is C$ 233. 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

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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 24 December 2024.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 174AverageC$ 516FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
JetBlueCheapestC$ 177AverageC$ 397FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapestC$ 185AverageC$ 380FlexibilityNo 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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