$148+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
May 21 — May 281
Round-trip
1 adult, Economy
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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 September or October, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday
Cheap flight deals from Seattle to Falmouth
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to FalmouthExplore 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 April 21, 2026.
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 April 21, 2026.
This Delta deal was found by Cheapflights users on 4/21. 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 5/1511:00 pm
SEA
- BOS
Nonstop5h 35m
Delta
Sun 5/247:48 am
BOS
- SEA
Nonstop6h 07m
Delta
Deal found 4/21![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 4/20. 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.
Thu 8/1311:05 pm
SEA
- BOS
1 stop6h 55m
Southwest
Tue 8/182:10 pm
BOS
- SEA
1 stop9h 15m
Southwest
Deal found 4/20![Southwest logo]()
$260
This Southwest deal was found by Cheapflights users on 4/21. 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.
Tue 9/225:20 am
SEA
- BOS
2 stops10h 15m
Southwest
Mon 9/289:40 am
BOS
- SEA
1 stop8h 20m
Southwest
Deal found 4/21![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 4/21. 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.
Wed 5/2011:45 am
SEA
- BOS
1 stop8h 06m
Delta
Wed 5/273:55 pm
BOS
- SEA
Nonstop6h 10m
Delta
Deal found 4/21![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 4/19. 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.
Wed 8/1211:05 pm
SEA
- BOS
1 stop6h 55m
Southwest
Wed 8/193:20 pm
BOS
- SEA
1 stop11h 15m
Southwest
Deal found 4/19![Southwest logo]()
$269
This Southwest deal was found by Cheapflights users on 4/20. 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.
Wed 9/235:30 pm
SEA
- BOS
1 stop9h 30m
Southwest
Mon 9/285:25 am
BOS
- SEA
1 stop11h 30m
Southwest
Deal found 4/20![Southwest logo]()
$278
This SmartFares deal was found by Cheapflights users on 4/19. 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 6/34:47 pm
SEA
- BOS
1 stop9h 57m
Alaska Airlines
Wed 6/107:44 pm
BOS
- SEA
Nonstop6h 23m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$281
This Cheapflightsfares deal was found by Cheapflights users on 4/16. 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 6/311:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Sat 6/67:00 am
BOS
- SEA
Nonstop6h 15m
JetBlue
Deal found 4/16![JetBlue logo]()
$282
This Southwest deal was found by Cheapflights users on 4/21. 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.
Wed 8/195:20 am
SEA
- BOS
2 stops10h 15m
Southwest
Sat 8/291:00 pm
BOS
- SEA
1 stop10h 55m
Southwest
Deal found 4/21![Southwest logo]()
$283
This JetBlue deal was found by Cheapflights users on 4/20. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/211:35 am
SEA
- BOS
Nonstop5h 39m
JetBlue
Tue 6/97:00 am
BOS
- SEA
Nonstop6h 15m
JetBlue
Deal found 4/20![JetBlue logo]()
$287
Best flights from Seattle to FalmouthDiscover carefully curated flight deals from Seattle to Falmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 21, 2026.
Discover carefully curated flight deals from Seattle to Falmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 21, 2026.
This Delta deal was found by Cheapflights users on 4/21. 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.
Sat 6/612:35 pm
SEA
- BOS
1 stop7h 54m
Delta
Fri 6/127:25 pm
BOS
- SEA
Nonstop6h 24m
Delta
Deal found 4/21![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 4/17. 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.
Wed 8/195:30 pm
SEA
- BOS
1 stop9h 30m
Southwest
Wed 8/262:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Deal found 4/17![Southwest logo]()
$322
This United Airlines deal was found by Cheapflights users on 4/18. 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 9/1610:47 pm
SEA
- BOS
1 stop7h 36m
United Airlines
Sun 9/206:00 am
BOS
- SEA
1 stop9h 23m
United Airlines
Deal found 4/18![United Airlines logo]()
$326
This Alaska Airlines deal was found by Cheapflights users on 4/18. 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.
Sat 5/27:00 am
SEA
- BOS
Nonstop5h 33m
Alaska Airlines
Sat 5/236:40 pm
BOS
- SEA
1 stop17h 45m
Alaska Airlines
Deal found 4/18![Alaska Airlines logo]()
$367
This Delta deal was found by Cheapflights users on 4/21. 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.
Wed 5/1311:15 am
SEA
- BOS
Nonstop5h 34m
Delta
Thu 5/2810:55 am
BOS
- SEA
1 stop12h 35m
Delta
Deal found 4/21![Delta logo]()
$267
This Delta deal was found by Cheapflights users on 4/21. 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.
Wed 5/2011:45 am
SEA
- BOS
1 stop8h 06m
Delta
Wed 5/276:15 am
BOS
- SEA
1 stop11h 50m
Delta
Deal found 4/21![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 4/21. 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.
Mon 9/147:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Fri 9/185:50 am
BOS
- SEA
2 stops11h 05m
Southwest
Deal found 4/21![Southwest logo]()
$355
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1910:00 pm
SEA
- BOS
Nonstop5h 35m
Delta
Sat 9/266:35 pm
BOS
- SEA
Nonstop6h 30m
Delta
Deal found 4/20![Delta logo]()
$297
This Delta deal was found by Cheapflights users on 4/21. 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.
Sat 5/3011:00 pm
SEA
- BOS
Nonstop5h 35m
Delta
Wed 6/37:48 am
BOS
- SEA
Nonstop6h 05m
Delta
Deal found 4/21![Delta logo]()
$347
This Delta deal was found by Cheapflights users on 4/18. 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.
Sat 5/210:35 pm
SEA
- BOS
Nonstop5h 20m
Delta
Sat 5/2311:55 am
BOS
- SEA
Nonstop6h 10m
Delta
Deal found 4/18![Delta logo]()
$362
This Delta deal was found by Cheapflights users on 4/21. 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.
Tue 7/711:59 pm
SEA
- BOS
1 stop7h 44m
Delta
Mon 7/207:20 pm
BOS
- SEA
Nonstop6h 29m
Delta
Deal found 4/21![Delta logo]()
$363
This Delta deal was found by Cheapflights users on 4/17. 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 5/2211:15 am
SEA
- BOS
Nonstop5h 34m
Delta
Mon 5/257:48 am
BOS
- SEA
Nonstop6h 07m
Delta
Deal found 4/17![Delta logo]()
$367
Last-minute flights from Seattle to FalmouthDiscover last-minute flight deals from Seattle to Falmouth. Data last updated April 21, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Falmouth. Data last updated April 21, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/16. 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.
Thu 4/3011:33 pm
SEA
- BOS
1 stop8h 06m
American Airlines
Tue 5/125:35 pm
BOS
- SEA
1 stop10h 01m
American Airlines
Deal found 4/16![American Airlines logo]()
$312
This Expedia deal was found by Cheapflights users on 4/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:00 am
SEA
- BOS
Nonstop5h 33m
Alaska Airlines
Tue 5/124:33 pm
BOS
- SEA
Nonstop6h 22m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$362
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Fri 5/111:33 pm
SEA
- BOS
1 stop8h 59m
American Airlines
Tue 5/54:34 pm
BOS
- SEA
1 stop9h 04m
American Airlines
Deal found 4/17![American Airlines logo]()
$327
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Fri 5/111:33 pm
SEA
- BOS
1 stop8h 06m
American Airlines
Mon 5/43:59 pm
BOS
- SEA
1 stop11h 37m
American Airlines
Deal found 4/17![American Airlines logo]()
$337
This CheapOair deal was found by Cheapflights users on 4/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:51 pm
SEA
- BOS
1 stop15h 12m
Alaska Airlines
Sat 5/96:42 pm
BOS
- SEA
Nonstop6h 17m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$363
This CheapOair deal was found by Cheapflights users on 4/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:21 pm
SEA
- BOS
Nonstop5h 38m
Alaska Airlines
Tue 5/55:56 pm
BOS
- SEA
1 stop19h 30m
Alaska Airlines
Deal found 4/18![Alaska Airlines logo]()
$382
This CheapOair deal was found by Cheapflights users on 4/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:21 pm
SEA
- BOS
Nonstop5h 38m
Alaska Airlines
Mon 5/45:56 pm
BOS
- SEA
1 stop19h 30m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$392
This American Airlines deal was found by Cheapflights users on 4/18. 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.
Fri 5/112:34 pm
SEA
- BOS
1 stop7h 56m
American Airlines
Sat 5/96:00 am
BOS
- SEA
1 stop8h 34m
American Airlines
Deal found 4/18![American Airlines logo]()
$407
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Fri 5/110:53 pm
SEA
- BOS
1 stop9h 08m
United Airlines
Sat 5/95:45 am
BOS
- SEA
2 stops15h 47m
United Airlines
Deal found 4/17![United Airlines logo]()
$427
One-way flights from Seattle to FalmouthSearch for one-way flight options from Seattle to Falmouth. Find affordable one-way fares based on user searches. Data last updated April 21, 2026.
Search for one-way flight options from Seattle to Falmouth. Find affordable one-way fares based on user searches. Data last updated April 21, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 4/17. 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.
Sat 10/311:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Deal found 4/17![JetBlue logo]()
$148
This Delta deal was found by Cheapflights users on 4/19. 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.
Tue 5/1211:00 pm
SEA
- BOS
Nonstop5h 35m
Delta
Deal found 4/19![Delta logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Mon 5/49:19 pm
SEA
- BOS
2 stops32h 53m
Frontier
Deal found 4/20![Frontier logo]()
$152
This United Airlines deal was found by Cheapflights users on 4/19. 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 5/1110:52 am
SEA
- BOS
1 stop9h 43m
United Airlines
Deal found 4/19![United Airlines logo]()
$154
This Southwest deal was found by Cheapflights users on 4/19. 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 8/155:30 pm
SEA
- BOS
1 stop9h 30m
Southwest
Deal found 4/19![Southwest logo]()
$155
This Southwest deal was found by Cheapflights users on 4/21. 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.
Mon 8/247:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Deal found 4/21![Southwest logo]()
$157
This American Airlines deal was found by Cheapflights users on 4/17. 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 5/511:16 am
SEA
- BOS
1 stop7h 52m
American Airlines
Deal found 4/17![American Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Tue 5/1911:06 am
SEA
- BOS
2 stops18h 38m
Frontier
Deal found 4/19![Frontier logo]()
$163
This Alaska Airlines deal was found by Cheapflights users on 4/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/184:47 pm
SEA
- BOS
1 stop9h 57m
Alaska Airlines
Deal found 4/20![Alaska Airlines logo]()
$164
This American Airlines deal was found by Cheapflights users on 4/17. 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 6/135:15 am
SEA
- BOS
1 stop8h 17m
American Airlines
Deal found 4/17![American Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Mon 5/117:50 pm
SEA
- BOS
2 stops26h 34m
Frontier
Deal found 4/20![Frontier logo]()
$170
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 April 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $257 (Delta) |
One-way from | $148 (Cheapflightsfares) |
Popular in | December |
Cheapest in | September |
Average price | $437 |
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 April 21, 2026.
Use the filters below to find and compare flights from Seattle to Falmouth that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 6/6
12:35 pm-11:29 pm
1 stop7h 54m
Boston Logan Intl
Fri 6/12
7:25 pm-10:49 pm
Nonstop6h 24m
$267
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 5/13
11:15 am-7:49 pm
Nonstop5h 34m
Boston Logan Intl
Thu 5/28
10:55 am-8:30 pm
1 stop12h 35m
$267
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 5/20
11:45 am-10:51 pm
1 stop8h 06m
Boston Logan Intl
Wed 5/27
6:15 am-3:05 pm
1 stop11h 50m
$277
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 9/19
10:00 pm-6:35 am
Nonstop5h 35m
Boston Logan Intl
Sat 9/26
6:35 pm-10:05 pm
Nonstop6h 30m
$297
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 8/19
5:30 pm-6:00 am
1 stop9h 30m
Boston Logan Intl
Wed 8/26
2:45 pm-11:25 pm
2 stops11h 40m
$322
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 9/16
10:47 pm-9:23 am
1 stop7h 36m
Boston Logan Intl
Sun 9/20
6:00 am-12:23 pm
1 stop9h 23m
$326
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 5/30
11:00 pm-7:35 am
Nonstop5h 35m
Boston Logan Intl
Wed 6/3
7:48 am-10:53 am
Nonstop6h 05m
$347
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Mon 9/14
7:25 pm-9:55 am
2 stops11h 30m
Boston Logan Intl
Fri 9/18
5:50 am-1:55 pm
2 stops11h 05m
$355
Quickest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 5/2
10:35 pm-6:55 am
Nonstop5h 20m
Boston Logan Intl
Sat 5/23
11:55 am-3:05 pm
Nonstop6h 10m
$362
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Tue 7/7
11:59 pm-10:43 am
1 stop7h 44m
Boston Logan Intl
Mon 7/20
7:20 pm-10:49 pm
Nonstop6h 29m
$363
Showing 1-10 of 23 resultsSorted by cheapest first
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.
SEA-BOS
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
SEA-FM5
SEA-BOS
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 April 17, 2026.
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 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 April 21, 2026.
It’s optimal to fly from Seattle to Falmouth at noon. By choosing this option you can save up to 46% 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 April 18, 2026.
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 April 21, 2026.
The most flights from SEA to FM5 are scheduled on a Tuesday (20 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 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 April 21, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andHawaiian 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.
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Entertainment
7.0
Food
7.0
Boarding
8.1
Crew
8.5
Comfort
7.8
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
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.
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Seattle and Falmouth flights
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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 April 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$302 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$137 | Average$326 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$154 | Average$400 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$406 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$326 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$406 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$233 | Average$457 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$235 | Average$454 | FlexibilityNo cancel fee | On-time75% |