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Falmouth

$123+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 27 days in advance, depart on a Wednesday or Tuesday 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 November 6, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$252
(Southwest)

One-way from

$123
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$307
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
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One-way flight from Seattle/Tacoma Intl to Falmouth
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 6, 2025.

This Southwest deal was found by Cheapflights users on 11/3. 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.
Tue 11/189:35 amSEA - BOS
1 stop10h 10mSouthwest
Wed 11/196:45 amBOS - SEA
1 stop14h 55mSouthwest
Deal found 11/3$252
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/198:00 amSEA - BOS
1 stop7h 48mUnited Airlines
Mon 12/84:20 pmBOS - SEA
1 stop9h 18mUnited Airlines
Deal found 11/5$269
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/39:25 amSEA - BOS
1 stop9h 18mUnited Airlines
Wed 12/106:00 amBOS - SEA
1 stop8h 47mUnited Airlines
Deal found 11/5$272
This SmartFares deal was found by Cheapflights users on 11/4. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/49:00 amSEA - BOS
Nonstop5h 20mAlaska Airlines
Wed 12/107:00 amBOS - SEA
Nonstop6h 35mAlaska Airlines
Deal found 11/4$277
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/109:25 amSEA - BOS
1 stop9h 18mUnited Airlines
Mon 12/156:00 amBOS - SEA
1 stop8h 45mUnited Airlines
Deal found 11/5$279
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/910:40 amSEA - BOS
2 stops9h 05mUnited Airlines
Tue 12/164:20 pmBOS - SEA
1 stop9h 08mUnited Airlines
Deal found 11/4$282
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/311:50 pmSEA - BOS
1 stop8h 08mUnited Airlines
Mon 12/86:00 amBOS - SEA
1 stop8h 45mUnited Airlines
Deal found 11/4$284
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/49:25 amSEA - BOS
1 stop9h 18mUnited Airlines
Sat 12/63:25 pmBOS - SEA
1 stop8h 56mUnited Airlines
Deal found 11/5$286
This SmartFares deal was found by Cheapflights users on 11/6. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:10 pmSEA - BOS
Nonstop5h 19mAlaska Airlines
Mon 12/86:59 pmBOS - SEA
Nonstop6h 31mAlaska Airlines
Deal found 11/6$287
This Southwest deal was found by Cheapflights users on 11/5. 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 12/46:35 amSEA - BOS
1 stop12h 00mSouthwest
Wed 12/105:30 amBOS - SEA
1 stop10h 55mSouthwest
Deal found 11/5$289
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Tue 12/210:07 pmSEA - BOS
1 stop9h 24mAmerican Airlines
Wed 12/101:45 pmBOS - SEA
1 stop12h 40mAmerican Airlines
Deal found 11/5$290
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Sat 12/67:00 amSEA - BOS
1 stop7h 15mUnited Airlines
Sat 1/1012:45 pmBOS - SEA
1 stop8h 29mUnited Airlines
Deal found 11/6$291

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 November 6, 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

Mon 12/8

9:25 am-9:43 pm

1 stop9h 18m

Boston Logan Intl

Thu 12/11

10:40 am-4:07 pm

1 stop8h 27m

$286

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 2/12

5:15 am-6:25 pm

2 stops10h 10m

Boston Logan Intl

Tue 2/17

4:45 pm-10:50 pm

1 stop9h 05m

$289

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 12/4

6:35 am-9:35 pm

1 stop12h 00m

Boston Logan Intl

Wed 12/10

5:30 am-1:25 pm

1 stop10h 55m

$289

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 1/8

7:55 am-4:20 pm

Nonstop5h 25m

Boston Logan Intl

Sat 1/10

6:44 pm-10:17 pm

Nonstop6h 33m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 2/19

7:30 am-3:59 pm

Nonstop5h 29m

Boston Logan Intl

Sun 2/22

6:57 pm-10:25 pm

Nonstop6h 28m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 12/6

7:35 am-4:04 pm

Nonstop5h 29m

Boston Logan Intl

Sun 12/14

6:55 pm-10:14 pm

Nonstop6h 19m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 1/6

8:10 am-9:52 pm

2 stops10h 42m

Boston Logan Intl

Sun 1/11

10:30 am-4:01 pm

1 stop8h 31m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 12/10

6:35 am-4:45 pm

1 stop7h 10m

Boston Logan Intl

Mon 12/15

5:45 am-1:25 pm

2 stops10h 40m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 12/4

3:40 pm-11:58 pm

Nonstop5h 18m

Boston Logan Intl

Sun 12/7

7:15 am-10:45 am

Nonstop6h 30m

$307

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 12/7

10:25 pm-6:55 am

Nonstop5h 30m

Boston Logan Intl

Wed 12/10

5:30 pm-8:48 pm

Nonstop6h 18m

$307

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 23 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 October 31, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Falmouth, you should look to book at least 27 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 August is currently the most expensive (average of $178). 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 November 6, 2025.

It’s optimal to fly from Seattle to Falmouth in the afternoon. By choosing this option you can save up to 11% 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 November 2, 2025.

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. 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 November 6, 2025.

The most flights from SEA to FM5 are scheduled on a Thursday (26 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 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 November 6, 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
11,243 reviews

Overall

8.0

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

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
11,243 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Overall

8.0

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

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
8,001 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Overall

8.0

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

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
2,804 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Overall

8.0

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

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
11,040 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Overall

8.0

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

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
2,907 reviews
Alaska Airlines
8.0
Very good
11,243 reviews

Overall

8.0

Entertainment

7.0

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

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 16 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?

    United Airlines, Southwest, and Alaska Airlines can get you from Seattle to Falmouth in just under 5h 25m. Your travel time can differ by up to 4h 45m. 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 most reliable airlines from Seattle to Falmouth?

    Consider LATAM Airlines (89%), Condor (86%) or Scandinavian Airlines (80%) 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 $829, our data indicates the cheapest price to be $118. 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 $98). Flying from Seattle to Falmouth in August is currently the most expensive (average of $178). 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$352FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$138Average$327FlexibilityNo cancel feeOn-time62%
DeltaCheapest$149Average$430FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$178Average$479FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$404FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$213Average$394FlexibilityNo cancel feeOn-time63%
Sun Country AirCheapest$216Average$445FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$228Average$556FlexibilityNo cancel feeOn-time75%

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