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Falmouth

$129+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 28 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Seattle to Falmouth

Keep the following information in mind while searching for Seattle to Falmouth flight deals. Data was last updated July 2, 2025.

Round-trip from

$217
(Alaska Airlines)

One-way from

$129
(Alaska Airlines)

Popular in

August

Cheapest in

January

Average price

$457
From Seattle/Tacoma Intl to Falmouth
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One-way flight from Seattle/Tacoma Intl to Falmouth
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Highest demand for flights based on searches. 15% potential increase in price ($67 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 July 2, 2025.

This Delta deal was found by Cheapflights users on 6/30. 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.
Wed 9/243:38 pmSEA - BOS
Nonstop5h 21mDelta
Tue 9/307:25 amBOS - SEA
Nonstop6h 18mDelta
Deal found 6/30$217
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:59 pmSEA - BOS
1 stop19h 41mAlaska Airlines
Tue 9/97:45 amBOS - SEA
1 stop10h 05mAlaska Airlines
Deal found 7/1$236
This Hawaiian Airlines deal was found by Cheapflights users on 6/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/183:59 pmSEA - BOS
Nonstop5h 28mHawaiian Airlines
Mon 9/296:55 pmBOS - SEA
Nonstop6h 13mHawaiian Airlines
Deal found 6/30$237
This JetBlue deal was found by Cheapflights users on 6/30. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1511:30 amSEA - BOS
Nonstop5h 33mJetBlue
Sun 10/197:00 amBOS - SEA
Nonstop6h 19mJetBlue
Deal found 6/30$238
This Southwest deal was found by Cheapflights users on 7/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/119:10 pmSEA - BOS
1 stop9h 50mSouthwest
Wed 9/1712:40 pmBOS - SEA
2 stops11h 15mSouthwest
Deal found 7/1$252
This United Airlines deal was found by Cheapflights users on 6/30. 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 8/1312:20 amSEA - BOS
1 stop7h 37mUnited Airlines
Tue 8/1912:30 pmBOS - SEA
1 stop9h 19mUnited Airlines
Deal found 6/30$282
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/119:45 pmSEA - BOS
1 stop9h 29mAmerican Airlines
Tue 8/197:00 amBOS - SEA
1 stop10h 15mAmerican Airlines
Deal found 6/30$283
This Orbitz deal was found by Cheapflights users on 6/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/125:59 pmSEA - BOS
1 stop9h 11mMultiple Airlines
Thu 8/2112:57 pmBOS - SEA
2 stops14h 37mMultiple Airlines
Deal found 6/30$315

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 July 2, 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

Wed 9/24

3:38 pm-11:59 pm

Nonstop5h 21m

Boston Logan Intl

Tue 9/30

7:25 am-10:43 am

Nonstop6h 18m

$217

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 9/3

6:59 pm-5:40 pm

1 stop19h 41m

Boston Logan Intl

Tue 9/9

7:45 am-2:50 pm

1 stop10h 05m

$236

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 9/18

3:59 pm-12:27 am

Nonstop5h 28m

Boston Logan Intl

Mon 9/29

6:55 pm-10:08 pm

Nonstop6h 13m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 10/15

11:30 am-8:03 pm

Nonstop5h 33m

Boston Logan Intl

Sun 10/19

7:00 am-10:19 am

Nonstop6h 19m

$238

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 9/11

9:10 pm-10:00 am

1 stop9h 50m

Boston Logan Intl

Wed 9/17

12:40 pm-8:55 pm

2 stops11h 15m

$252

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 8/11

9:45 pm-10:14 am

1 stop9h 29m

Boston Logan Intl

Tue 8/19

7:00 am-2:15 pm

1 stop10h 15m

$283

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 8/14

12:20 am-10:54 am

1 stop7h 34m

Boston Logan Intl

Fri 8/22

5:05 pm-10:59 pm

1 stop8h 54m

$297

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 8/12

5:59 pm-6:10 am

1 stop9h 11m

Boston Logan Intl

Thu 8/21

12:57 pm-12:34 am

2 stops14h 37m

$315

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 9/7

11:34 pm-8:00 am

Nonstop5h 26m

$129

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 8/6

5:30 pm-8:37 am

2 stops12h 07m

$131

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 18 results
1
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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 June 27, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Falmouth, you should look to book at least 28 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 $218). Flying from Seattle to Falmouth 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 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 July 2, 2025.

When flying from Seattle to Falmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 16, 2024.

Travelers seeking maximum savings on their Seattle to Falmouth 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 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 July 2, 2025.

The most flights from SEA to FM5 are scheduled on a Monday (37 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (16 on average).

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 July 2, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

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

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

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
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

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
7,983 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

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
7.8
Good
2,540 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

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
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

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 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 29 outbound flights to Falmouth per day. 9 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 12 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 to fly from Seattle to Falmouth one-way?

    One-way options have recently been found by users for as low as $129 on Alaska Airlines. Other airlines that offer cheap prices include Spirit Airlines from $131 and American Airlines from $133 one-way.

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

    Consider EL AL (97%), Scandinavian Airlines (95%) or Air France (93%) 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 $946, our data indicates the cheapest price to be $137. The most popular route (Seattle/Tacoma Intl - Boston Logan Intl), is priced around $217.

  • 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 $218). Flying from Seattle to Falmouth 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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Top 9 airlines flying from Seattle to Falmouth

Discover the top 9 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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$383FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$139Average$337FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$145Average$252FlexibilityNo cancel feeOn-time65%
DeltaCheapest$160Average$417FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$198Average$382FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$216Average$461FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$232Average$561FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$236Average$478FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$326Average$439FlexibilityNo cancel feeOn-time63%

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