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Falmouth

$168+ Cheap flights from Seattle (SEA) to Falmouth, MA, MA

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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Jan 23 — Jan 301
Fri 1/23
Fri 1/30
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Falmouth are usually found in January or March, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to Falmouth

Cheapest flights from Seattle to Falmouth
Explore the most affordable flight options available from Seattle to Falmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 24, 2025.

This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:00 amSEA - BOS
1 stop9h 10mUnited Airlines
Wed 1/76:00 amBOS - SEA
1 stop8h 32mUnited Airlines
Deal found 12/21$382
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:02 amSEA - BOS
1 stop7h 33mUnited Airlines
Tue 1/69:30 amBOS - SEA
2 stops11h 44mUnited Airlines
Deal found 12/22$426
This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 amSEA - BOS
1 stop9h 13mUnited Airlines
Thu 1/87:55 amBOS - SEA
1 stop10h 49mUnited Airlines
Deal found 12/21$447
This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:00 amSEA - BOS
1 stop11h 56mUnited Airlines
Mon 1/1210:56 amBOS - SEA
1 stop10h 31mUnited Airlines
Deal found 12/21$452
This Delta deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:10 amSEA - BOS
1 stop8h 01mDelta
Mon 1/126:45 pmBOS - SEA
Nonstop6h 28mDelta
Deal found 12/21$467
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:44 pmSEA - BOS
1 stop7h 51mUnited Airlines
Mon 1/53:15 pmBOS - SEA
1 stop10h 57mUnited Airlines
Deal found 12/22$475
This United Airlines deal was found by Cheapflights users on 12/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:02 amSEA - BOS
1 stop7h 33mUnited Airlines
Tue 1/69:30 amBOS - SEA
2 stops11h 44mUnited Airlines
Deal found 12/24$512
This Kiwi.com deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:32 pmSEA - BOS
1 stop11h 51mMultiple Airlines
Wed 1/712:29 pmBOS - SEA
2 stops32h 08mMultiple Airlines
Deal found 12/21$520

Find flight deals from Seattle to Falmouth

Keep the following information in mind while searching for Seattle to Falmouth flight deals. Data was last updated December 24, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$296
(Alaska Airlines)

One-way from

$168
(Delta)

Popular in

December

Cheapest in

January

Average price

$536
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
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From Seattle/Tacoma Intl to Falmouth
Search Deals
One-way flight from Seattle/Tacoma Intl to Falmouth
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Falmouth 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 2,558,603 searches. Data last updated December 24, 2025.
Use the filters below to find and compare flights from Seattle to Falmouth that are best for you.

Fly from

Seattle

Fly to

Falmouth

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 1/20

4:33 pm-5:39 pm

1 stop22h 06m

Boston Logan Intl

Sat 1/24

6:44 pm-10:17 pm

Nonstop6h 33m

$296

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 1/8

8:10 am-6:57 pm

1 stop7h 47m

Boston Logan Intl

Tue 1/20

7:55 am-3:44 pm

1 stop10h 49m

$297

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 2/16

11:35 pm-10:45 am

1 stop8h 10m

Boston Logan Intl

Fri 2/20

2:20 pm-8:56 pm

1 stop9h 36m

$297

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 2/20

10:20 pm-6:50 am

Nonstop5h 30m

Boston Logan Intl

Sun 2/22

7:15 am-10:45 am

Nonstop6h 30m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 3/12

3:42 pm-11:59 pm

Nonstop5h 17m

Boston Logan Intl

Wed 3/18

5:40 pm-9:27 am

1 stop18h 47m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 1/11

10:25 pm-6:50 am

Nonstop5h 25m

Boston Logan Intl

Fri 1/16

6:45 pm-10:13 pm

Nonstop6h 28m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 2/13

10:15 pm-9:09 am

1 stop7h 54m

Boston Logan Intl

Tue 2/17

6:57 pm-10:25 pm

Nonstop6h 28m

$317

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 2/12

7:00 pm-6:00 am

1 stop8h 00m

Boston Logan Intl

Tue 2/17

6:57 pm-10:25 pm

Nonstop6h 28m

$317

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 1/8

9:25 am-9:42 pm

1 stop9h 17m

Boston Logan Intl

Mon 1/12

9:30 am-4:01 pm

1 stop9h 31m

$322

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 3/18

11:50 am-11:49 pm

1 stop8h 59m

Boston Logan Intl

Sun 3/29

6:15 am-2:54 pm

1 stop11h 39m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/23

Showing 1-10 of 21 results
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Best time to book a flight from Seattle to Falmouth

Have a flexible travel schedule? Discover the best time to fly to Falmouth 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 Falmouth

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Falmouth. Price data was last updated on December 19, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Falmouth, you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Falmouth (average of $98). Flying from Seattle to Falmouth in December is currently the most expensive (average of $233). 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 FM5?

Find hourly flight availability from Seattle to Falmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 24, 2025.

It’s optimal to fly from Seattle to Falmouth at noon. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Seattle to Falmouth. Price data was last updated on December 20, 2025.

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

Weekly flight availability from Seattle to Falmouth

Explore weekly flight availability from Seattle to Falmouth. 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 December 24, 2025.

The most flights from SEA to FM5 are scheduled on a Monday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

How much does it cost to fly round-trip from Seattle to Falmouth?

Reviews of airlines servicing Falmouth

Get insights into the airlines that provide service to Falmouth. 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 Falmouth. Reviews last updated December 24, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Seattle to Falmouth. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,517 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,015 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Hawaiian Airlines
7.8
Good
2,820 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
11,050 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
JetBlue
7.2
Good
2,898 reviews
Alaska Airlines
8.0
Very good
11,517 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Falmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Falmouth?

    For a flight from Seattle to Falmouth, you will be flying from Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 19 outbound flights to Falmouth per day. 8 airlines have flights to Falmouth from Seattle/Tacoma Intl on a regular basis.

  • How popular is this Seattle to Falmouth flight route?

    The Seattle/Tacoma Intl to Falmouth flight path was viewed by 22 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to Falmouth?

    Alaska Airlines, United Airlines, and Delta can get you from Seattle to Falmouth in just under 5h 30m. Your travel time can differ by up to 16h 36m. There are 2487 mi between Seattle and Falmouth. Both multi-stop and nonstop flights can be found to your destination and back.

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

    One-way options have recently been found by users for as low as $98 on American Airlines. Other airlines that offer cheap prices include JetBlue from $108 and Delta from $116 one-way.

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

    Consider TAP AIR PORTUGAL (100%), JetBlue (90%) or EL AL (89%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Falmouth.

  • What are the cheapest flights from Seattle to Falmouth?

    Looking for the cheapest flight from Seattle to Falmouth? While on average our users pay $918, our data indicates the cheapest price to be $153. The most popular route (Seattle/Tacoma Intl - Boston Logan Intl), is priced around $247.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Falmouth (average of $98). Flying from Seattle to Falmouth in December is currently the most expensive (average of $233). 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 8 airlines flying from Seattle to Falmouth

Discover the top 8 airlines that operate flights from Seattle to Falmouth. 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 2,558,603 searches. Data last updated December 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$352FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$143Average$329FlexibilityNo cancel feeOn-time62%
DeltaCheapest$162Average$434FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$196Average$422FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$209Average$472FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$213Average$400FlexibilityNo cancel feeOn-time63%
Sun Country AirCheapest$233Average$457FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$237Average$560FlexibilityNo cancel feeOn-time75%

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