HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Falmouth

$118+ 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Falmouth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$186
(Southwest)

One-way from

$118
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$330
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
Search Deals
From Seattle/Tacoma Intl to Falmouth
Search Deals
One-way flight from Seattle/Tacoma Intl to Falmouth
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 22, 2025.

This Southwest deal was found by Cheapflights users on 10/20. 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.
Sat 12/65:45 amSEA - BOS
1 stop7h 20mSouthwest
Mon 12/85:00 pmBOS - SEA
1 stop8h 55mSouthwest
Deal found 10/20$198
This American Airlines deal was found by Cheapflights users on 10/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/612:38 amSEA - BOS
1 stop7h 54mAmerican Airlines
Wed 12/101:45 pmBOS - SEA
1 stop12h 40mAmerican Airlines
Deal found 10/21$221
This Kiwi.com deal was found by Cheapflights users on 10/20. 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.
Fri 11/143:59 pmSEA - BOS
Nonstop5h 21mHawaiian Airlines
Thu 11/207:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Deal found 10/20$224
This Southwest deal was found by Cheapflights users on 10/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:40 amSEA - BOS
1 stop7h 25mSouthwest
Mon 12/85:00 pmBOS - SEA
1 stop8h 55mSouthwest
Deal found 10/21$226
This American Airlines deal was found by Cheapflights users on 10/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:41 pmSEA - BOS
1 stop8h 34mAmerican Airlines
Mon 12/81:45 pmBOS - SEA
1 stop12h 40mAmerican Airlines
Deal found 10/21$228
This Kissandfly.com deal was found by Cheapflights users on 10/21. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/143:59 pmSEA - BOS
Nonstop5h 21mAlaska Airlines
Thu 11/207:00 amBOS - SEA
Nonstop6h 35mAlaska Airlines
Deal found 10/21$230
This Southwest deal was found by Cheapflights users on 10/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:45 amSEA - BOS
1 stop7h 20mSouthwest
Thu 12/115:00 pmBOS - SEA
1 stop8h 55mSouthwest
Deal found 10/21$232
This Delta deal was found by Cheapflights users on 10/21. 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.
Fri 11/1410:05 pmSEA - BOS
Nonstop5h 30mDelta
Thu 11/207:15 amBOS - SEA
Nonstop6h 30mDelta
Deal found 10/21$234
This Cheapflightsfares deal was found by Cheapflights users on 10/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:59 pmSEA - BOS
Nonstop5h 21mAlaska Airlines
Fri 11/147:00 amBOS - SEA
Nonstop6h 35mAlaska Airlines
Deal found 10/21$235

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 October 22, 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

Fri 11/14

10:05 pm-6:35 am

Nonstop5h 30m

Boston Logan Intl

Thu 11/20

7:15 am-10:45 am

Nonstop6h 30m

$234

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 11/10

11:10 pm-7:29 am

Nonstop5h 19m

Boston Logan Intl

Sat 11/15

7:00 am-10:35 am

Nonstop6h 35m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 12/3

10:25 pm-6:55 am

Nonstop5h 30m

Boston Logan Intl

Thu 12/11

11:25 am-2:44 pm

Nonstop6h 19m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 12/5

3:38 pm-11:59 pm

Nonstop5h 21m

Boston Logan Intl

Wed 12/10

7:00 am-10:35 am

Nonstop6h 35m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 12/6

3:40 pm-11:58 pm

Nonstop5h 18m

Boston Logan Intl

Sat 12/13

6:55 pm-10:14 pm

Nonstop6h 19m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 11/11

10:05 pm-6:35 am

Nonstop5h 30m

Boston Logan Intl

Thu 12/4

7:15 am-10:45 am

Nonstop6h 30m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 11/10

7:00 am-5:15 pm

1 stop7h 15m

Boston Logan Intl

Sat 11/15

8:00 am-4:15 pm

1 stop11h 15m

$242

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 12/5

11:10 pm-7:29 am

Nonstop5h 19m

Boston Logan Intl

Tue 12/9

4:24 pm-12:12 am

1 stop10h 48m

$247

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 12/4

8:31 pm-3:37 pm

1 stop16h 06m

Boston Logan Intl

Sun 12/7

9:00 am-12:35 pm

Nonstop6h 35m

$282

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 11/19

10:05 pm-6:35 am

Nonstop5h 30m

Boston Logan Intl

Sun 11/23

7:15 am-10:45 am

Nonstop6h 30m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 23 results
1
2
3

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 17, 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 October 22, 2025.

It’s optimal to fly from Seattle to Falmouth in the afternoon. By choosing this option you can save up to 10% 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 October 19, 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 October 22, 2025.

The most flights from SEA to FM5 are scheduled on a Tuesday (31 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 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 October 22, 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
11,150 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

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
11,150 reviews
Alaska Airlines
8.0
Very good
11,150 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

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
7,977 reviews
Alaska Airlines
8.0
Very good
11,150 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

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
2,788 reviews
Alaska Airlines
8.0
Very good
11,150 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

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
11,028 reviews
Alaska Airlines
8.0
Very good
11,150 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

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
2,908 reviews
Alaska Airlines
8.0
Very good
11,150 reviews

Entertainment

7.0

Comfort

7.8

Boarding

8.1

Overall

8.0

Crew

8.5

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 22 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?

    Delta and Alaska Airlines can get you from Seattle to Falmouth in just under 5h 19m. Your travel time will be generally consistent. There are 2487 mi between Seattle and Falmouth. Generally, flights for this route are nonstop.

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

    Consider Condor (85%), LATAM Airlines (78%) or Air France (77%) 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 $657, our data indicates the cheapest price to be $117. The most popular route (Seattle/Tacoma Intl - Boston Logan Intl), is priced around $198.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Falmouth

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Boston flights
Portland to Boston flights
Seattle to Albany flights
Seattle to Hartford flights
Portland to Hartford flights
Portland to Albany flights
Spokane to Boston flights
Pasco to Boston flights
Portland to New Bedford flights
Spokane to Hartford flights
Pasco to Hartford flights
Bellingham to Boston flights
Spokane to Albany flights
Yakima to Boston flights
Pullman to Boston flights
Walla Walla to Boston flights
Yakima to Hartford flights
Seattle to Provincetown flights
Bellingham to Hartford flights
Yakima to Albany flights
Seattle to West Tisbury flights
Seattle to Hyannis flights
Portland to Provincetown flights
Portland to Nantucket flights
Seattle to Nantucket flights
Pullman to Albany flights
Portland to Hyannis flights
Portland to West Tisbury flights

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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$352FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$134Average$326FlexibilityNo cancel feeOn-time62%
DeltaCheapest$148Average$420FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$178Average$483FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$404FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$213Average$396FlexibilityNo cancel feeOn-time63%
Sun Country AirCheapest$216Average$370FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$221Average$554FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.