How popular is this Seattle to Boston flight route?

Within the past month, 13 users have taken a look at flights from Seattle/Tacoma Intl to Boston Logan Intl.

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

Our cheapest airline available from Seattle to Boston is Delta. Our recent data shows that you can find tickets from as low as $197 on this airline. Additional options worth looking into are JetBlue and Hawaiian Airlines, starting at $207 and $217 round-trip. Delta is currently priced 45% below the average price you’ll pay for this route.

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

For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $124. Users have also found prices from $126 and $128 on Spirit Airlines and Hawaiian Airlines, respectively.

What are the cheapest flights from Seattle to Boston?

Looking at all options, your cheapest flight can be booked for $118. While the most popular route (Seattle/Tacoma Intl - Boston Logan Intl) can be booked for $197 on average our data indicates $1,035 when flying from Seattle to Boston.

What are the most reliable airlines from Seattle to Boston?

Before booking your flight to Boston from Seattle, check out the most reliable airlines to get you to your destination on time: EL AL (97%), Air France (97%), Scandinavian Airlines( 97%).

What are the most popular airlines that fly from Seattle to Boston?

The most popular airlines flying from Seattle to Boston are American Airlines, Alaska Airlines and JetBlue. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Seattle to Boston?

Saturday flights are found to be more expensive to fly from Seattle to Boston. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Boston.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 39 days in advance, which can save you up to 42% on flights from Seattle to Boston compared to booking the week you need them. Waiting 39 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 $358. For sooner than that we have options available in the next 3 days from $579.

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

January is one of the best times of the year to fly to Boston from Seattle. Prices for January average $360 per person but you can even find prices for as low as $98. The most expensive prices can be found in the month of August. Opting for a January flight can save you 33% on your journey compared to booking in August

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 27 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 12m for a nonstop flight. You can also purchase a plane ticket from 10 airlines when you book a flight from Seattle/Tacoma Intl to Boston.

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.

$124+ Flights from Seattle to Boston

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1. Tell us where you want to go

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2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or March, booked 38 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Seattle to Boston

Round-trip from	$197 (Delta)
One-way from	$124 (Alaska Airlines)
Popular in	August
Cheapest in	January
Average price	$458
Good round-trip deal	$264 or less
Good one-way deal	$172 or less

From Seattle/Tacoma Intl to Boston Logan Intl

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One-way flight from Seattle/Tacoma Intl to Boston Logan Intl

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Highest demand for flights based on searches. 17% potential increase in price ($74 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).

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Average for round-trip flights in June 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 June 12, 2025.

Wed 9/2410:00 pmSEA - BOS

Nonstop5h 34mDelta

Sat 10/47:05 amBOS - SEA

Nonstop6h 40mDelta

Deal found 6/10

$197

Sat 9/273:59 pmSEA - BOS

Nonstop5h 24mHawaiian Airlines

Tue 9/306:40 pmBOS - SEA

Nonstop6h 10mHawaiian Airlines

Deal found 6/12

$198

Sat 9/2011:30 amSEA - BOS

Nonstop5h 33mJetBlue

Sat 9/277:00 amBOS - SEA

Nonstop6h 19mJetBlue

Deal found 6/10

$207

Tue 8/510:43 pmSEA - BOS

1 stop8h 31mAmerican Airlines

Tue 8/1211:14 amBOS - SEA

1 stop11h 48mAmerican Airlines

Deal found 6/11

$220

Thu 9/47:56 amSEA - BOS

1 stop19h 04mAlaska Airlines

Tue 9/95:37 pmBOS - SEA

1 stop7h 52mAlaska Airlines

Deal found 6/10

$236

Tue 7/87:00 pmSEA - BOS

1 stop8h 01mUnited Airlines

Tue 7/155:30 amBOS - SEA

1 stop9h 20mUnited Airlines

Deal found 6/10

$270

Wed 7/23:58 pmSEA - BOS

2 stops20h 39mSpirit Airlines

Tue 7/84:44 pmBOS - SEA

2 stops26h 41mSpirit Airlines

Deal found 6/10

$280

Wed 8/610:45 pmSEA - BOS

2 stops12h 05mSouthwest

Tue 8/1911:25 amBOS - SEA

1 stop13h 10mSouthwest

Deal found 6/10

$308

Wed 7/29:24 amSEA - BOS

1 stop10h 55mMultiple Airlines

Tue 7/84:44 pmBOS - SEA

2 stops26h 41mMultiple Airlines

Deal found 6/11

$346

Mon 7/146:03 pmSEA - BOS

1 stop13h 34mSun Country Air

Mon 7/216:30 amBOS - SEA

1 stop19h 17mSun Country Air

Deal found 6/10

$360

Best flights from Seattle to Boston
Discover carefully curated flight deals from Seattle to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Wed 9/2410:00 pmSEA - BOS

Nonstop5h 34mDelta

Sat 10/47:05 amBOS - SEA

Nonstop6h 40mDelta

Deal found 6/10

$197

Sat 9/2011:30 amSEA - BOS

Nonstop5h 33mJetBlue

Sat 9/277:00 amBOS - SEA

Nonstop6h 19mJetBlue

Deal found 6/10

$207

Wed 9/311:34 pmSEA - BOS

Nonstop5h 26mHawaiian Airlines

Sat 9/67:20 amBOS - SEA

Nonstop6h 13mHawaiian Airlines

Deal found 6/9

$217

Tue 8/510:43 pmSEA - BOS

1 stop8h 31mAmerican Airlines

Tue 8/1211:14 amBOS - SEA

1 stop11h 48mAmerican Airlines

Deal found 6/11

$220

Thu 9/47:56 amSEA - BOS

1 stop19h 04mAlaska Airlines

Tue 9/95:37 pmBOS - SEA

1 stop7h 52mAlaska Airlines

Deal found 6/10

$236

Tue 7/87:00 pmSEA - BOS

1 stop8h 01mUnited Airlines

Tue 7/155:30 amBOS - SEA

1 stop9h 20mUnited Airlines

Deal found 6/10

$270

Wed 7/23:58 pmSEA - BOS

2 stops20h 39mSpirit Airlines

Tue 7/84:44 pmBOS - SEA

2 stops26h 41mSpirit Airlines

Deal found 6/10

$280

Wed 8/610:45 pmSEA - BOS

2 stops12h 05mSouthwest

Tue 8/1911:25 amBOS - SEA

1 stop13h 10mSouthwest

Deal found 6/10

$308

Wed 7/29:24 amSEA - BOS

1 stop10h 55mMultiple Airlines

Tue 7/84:44 pmBOS - SEA

2 stops26h 41mMultiple Airlines

Deal found 6/11

$346

Mon 7/146:03 pmSEA - BOS

1 stop13h 34mSun Country Air

Mon 7/216:30 amBOS - SEA

1 stop19h 17mSun Country Air

Deal found 6/10

$360

Last-minute flights from Seattle to Boston
Discover last-minute flight deals from Seattle to Boston. Data last updated June 12, 2025 and is based on user searches.

Tue 6/1710:50 amSEA - BOS

1 stop7h 30mSouthwest

Tue 6/244:40 pmBOS - SEA

1 stop10h 35mSouthwest

Deal found 6/10

$443

Thu 6/196:55 pmSEA - BOS

1 stop9h 35mAlaska Airlines

Wed 7/306:32 pmBOS - SEA

Nonstop6h 23mAlaska Airlines

Deal found 6/11

$417

Thu 6/195:59 pmSEA - BOS

1 stop10h 31mHawaiian Airlines

Mon 7/216:32 pmBOS - SEA

Nonstop6h 23mHawaiian Airlines

Deal found 6/10

$492

Thu 6/1911:55 pmSEA - BOS

1 stop8h 14mAmerican Airlines

Mon 7/214:40 pmBOS - SEA

1 stop9h 15mAmerican Airlines

Deal found 6/11

$517

Fri 6/207:50 amSEA - BOS

Nonstop5h 37mDelta

Wed 7/307:25 amBOS - SEA

Nonstop6h 19mDelta

Deal found 6/10

$373

Fri 6/203:58 pmSEA - BOS

2 stops19h 22mSpirit Airlines

Wed 6/254:44 pmBOS - SEA

2 stops25h 19mSpirit Airlines

Deal found 6/10

$440

Fri 6/208:00 amSEA - BOS

2 stops11h 24mUnited Airlines

Tue 7/295:30 amBOS - SEA

1 stop9h 20mUnited Airlines

Deal found 6/11

$454

Fri 6/209:15 amSEA - BOS

1 stop22h 22mSun Country Air

Mon 6/2311:44 amBOS - SEA

1 stop26h 18mSun Country Air

Deal found 6/10

$485

Sat 6/219:14 pmSEA - BOS

Nonstop5h 16mJetBlue

Tue 7/297:15 amBOS - SEA

Nonstop6h 18mJetBlue

Deal found 6/11

$333

Sun 6/2211:59 pmSEA - BOS

1 stop7h 38mMultiple Airlines

Fri 6/279:46 amBOS - SEA

2 stops32h 17mMultiple Airlines

Deal found 6/9

$551

Wed 7/23:58 pmSEA - BOS

2 stops20h 39mSpirit Airlines

Tue 7/84:44 pmBOS - SEA

2 stops26h 41mSpirit Airlines

Deal found 6/10

$280

Wed 7/29:24 amSEA - BOS

1 stop10h 55mMultiple Airlines

Tue 7/84:44 pmBOS - SEA

2 stops26h 41mMultiple Airlines

Deal found 6/11

$346

One-way flights from Seattle to Boston
Search for one-way flight options from Seattle to Boston. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Tue 8/263:59 pmSEA - BOS

Nonstop5h 24mAlaska Airlines

Deal found 6/10

$124

Wed 7/95:30 pmSEA - BOS

2 stops12h 07mSpirit Airlines

Deal found 6/12

$126

Tue 7/294:42 pmSEA - BOS

1 stop10h 28mHawaiian Airlines

Deal found 6/12

$128

Mon 9/156:42 amSEA - BOS

1 stop7h 57mAmerican Airlines

Deal found 6/12

$129

Wed 8/1311:20 pmSEA - BOS

1 stop8h 11mUnited Airlines

Deal found 6/10

$134

Mon 7/1410:17 pmSEA - BOS

Nonstop5h 23mDelta

Deal found 6/10

$139

Fri 7/116:45 amSEA - BOS

1 stop9h 10mSouthwest

Deal found 6/10

$149

Tue 7/111:30 amSEA - BOS

Nonstop5h 35mJetBlue

Deal found 6/10

$179

Thu 7/311:59 pmSEA - BOS

1 stop7h 38mSun Country Air

Deal found 6/10

$183

Thu 7/2411:59 pmSEA - BOS

3 stops20h 04mMultiple Airlines

Deal found 6/10

$252

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 9/3

3:59 pm-12:23 am

Nonstop5h 24m

Boston Logan Intl

Sat 9/6

6:40 pm-9:50 pm

Nonstop6h 10m

$197

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 8/5

10:43 pm-10:14 am

1 stop8h 31m

Boston Logan Intl

Tue 8/12

11:14 am-8:02 pm

1 stop11h 48m

$220

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 9/4

7:56 am-6:00 am

1 stop19h 04m

Boston Logan Intl

Tue 9/9

5:37 pm-10:29 pm

1 stop7h 52m

$236

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 7/14

10:17 pm-6:40 am

Nonstop5h 23m

Boston Logan Intl

Tue 7/22

6:50 pm-10:16 pm

Nonstop6h 26m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 8/29

9:50 pm-6:12 am

Nonstop5h 22m

Boston Logan Intl

Wed 9/3

7:00 am-10:19 am

Nonstop6h 19m

$238

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 7/8

7:00 pm-6:01 am

1 stop8h 01m

Boston Logan Intl

Tue 7/15

5:30 am-11:50 am

1 stop9h 20m

$270

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 7/2

3:58 pm-3:37 pm

2 stops20h 39m

Boston Logan Intl

Tue 7/8

4:44 pm-4:25 pm

2 stops26h 41m

$280

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 8/6

10:45 pm-1:50 pm

2 stops12h 05m

Boston Logan Intl

Tue 8/19

11:25 am-9:35 pm

1 stop13h 10m

$308

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 7/2

9:24 am-11:19 pm

1 stop10h 55m

Boston Logan Intl

Tue 7/8

4:44 pm-4:25 pm

2 stops26h 41m

$346

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 7/14

6:03 pm-10:37 am

1 stop13h 34m

Boston Logan Intl

Mon 7/21

6:30 am-10:47 pm

1 stop19h 17m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 20 results

The best insider tips for Seattle to Boston flights

Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Boston trip

Airports

SEA

Plan to arrive at SEA two hours before your flight. Use SEA Spot Saver for security appointments to reduce wait times.

BOS

Use the MBTA Silver Line for a free ride from BOS to downtown Boston, connecting with local and regional transit.

Our travel experts

Paul Rubio

Expert on BOS

Brandon Schultz

Expert on SEA

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?

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 $218). Flying from Seattle to Boston in June is currently the most expensive (average of $306). 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?

Unlike in the morning, when flights are generally more expensive, you can save up to 22% on flights from Seattle to Boston by exploring options for tickets in the afternoon.

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

Travelers seeking maximum savings on their Seattle to Boston flight should consider departing on Wednesday at noon when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Boston

The most flights from SEA to BOS are scheduled on a Thursday (38 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 on average).

Rainfall in Boston by month

In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.

Temperature in Boston 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boston

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Seattle to Boston. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

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

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

4,287 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

7,950 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

2,494 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

8,790 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

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 27 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 12m for a nonstop flight. You can also purchase a plane ticket from 10 airlines when you book a flight from Seattle/Tacoma Intl to Boston.
How popular is this Seattle to Boston flight route?
Within the past month, 13 users have taken a look at flights from Seattle/Tacoma Intl to Boston Logan Intl.
What are the cheapest airlines flying from Seattle to Boston round-trip?
Our cheapest airline available from Seattle to Boston is Delta. Our recent data shows that you can find tickets from as low as $197 on this airline. Additional options worth looking into are JetBlue and Hawaiian Airlines, starting at $207 and $217 round-trip. Delta is currently priced 45% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Seattle to Boston one-way?
For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $124. Users have also found prices from $126 and $128 on Spirit Airlines and Hawaiian Airlines, respectively.
What are the most reliable airlines from Seattle to Boston?
Before booking your flight to Boston from Seattle, check out the most reliable airlines to get you to your destination on time: EL AL (97%), Air France (97%), Scandinavian Airlines( 97%).
What are the cheapest flights from Seattle to Boston?
Looking at all options, your cheapest flight can be booked for $118. While the most popular route (Seattle/Tacoma Intl - Boston Logan Intl) can be booked for $197 on average our data indicates $1,035 when flying from Seattle to Boston.
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 $218). Flying from Seattle to Boston in June is currently the most expensive (average of $306). 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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Alternative routes for Seattle to Boston

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North End car rentals

Top 9 airlines flying from Seattle to Boston

Airline	Cheapest	Average	Flexibility	On-time
Hawaiian Airlines	Cheapest$118	Average$373	FlexibilityNo cancel fee	On-time85%
JetBlue	Cheapest$141	Average$352	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$145	Average$277	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$164	Average$386	FlexibilityNo cancel fee	On-timeN/A
Sun Country Air	Cheapest$179	Average$379	FlexibilityNo cancel fee	On-time83%
American Airlines	Cheapest$226	Average$431	FlexibilityNo cancel fee	On-time71%
Alaska Airlines	Cheapest$235	Average$472	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$236	Average$387	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$356	Average$466	FlexibilityNo cancel fee	On-time63%

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$124+ Cheap flights from Seattle to Boston (SEA - BOS)

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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Boston with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or March, booked 38 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Seattle to Boston

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Seattle to Boston

Cheapest flights from Seattle to BostonExplore 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 June 12, 2025.

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 June 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Boston that are best for you.

The best insider tips for Seattle to Boston flights

Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Boston trip

Airports

SEA

BOS

Our travel experts

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.

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 June 9, 2025.

What is the cheapest month to book a flight from Seattle to Boston?

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 June 12, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Seattle to Boston. Price data was last updated on June 8, 2025.

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 June 12, 2025.

Rainfall in Boston by month

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

Temperature in Boston by month

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

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 June 12, 2025.

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Seattle to Boston. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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What are the cheapest flights from Seattle to Boston?

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What is the cheapest month to book a flight from Seattle to Boston?

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Top 9 airlines flying from Seattle to Boston

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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 June 12, 2025.