$185+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Aug 20 — Aug 271
Round-trip
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 September or October, booked 85 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 July 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 July 21, 2026.
This Flighttix deal was found by Cheapflights users on 7/17. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:50 pm
SEA
- BOS
1 stop9h 31m
Multiple Airlines
Sat 10/241:00 pm
BOS
- SEA
1 stop11h 15m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$312
This JetBlue deal was found by Cheapflights users on 7/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Wed 9/2311:20 am
BOS
- SEA
1 stop12h 22m
JetBlue
Deal found 7/16![JetBlue logo]()
$314
This American Airlines deal was found by Cheapflights users on 7/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 am
SEA
- BOS
1 stop11h 04m
American Airlines
Tue 11/173:26 pm
BOS
- SEA
1 stop10h 08m
American Airlines
Deal found 7/20![American Airlines logo]()
$315
This Justfly.com deal was found by Cheapflights users on 7/18. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Tue 9/2911:20 am
BOS
- SEA
1 stop12h 22m
JetBlue
Deal found 7/18![JetBlue logo]()
$316
This JetBlue deal was found by Cheapflights users on 7/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/611:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Tue 10/136:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/16![JetBlue logo]()
$317
This Cheapflightsfares deal was found by Cheapflights users on 7/16. 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 9/1611:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Sun 9/206:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/16![JetBlue logo]()
$319
This American Airlines deal was found by Cheapflights users on 7/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:00 am
SEA
- BOS
1 stop9h 24m
American Airlines
Mon 10/266:00 am
BOS
- SEA
1 stop8h 39m
American Airlines
Deal found 7/19![American Airlines logo]()
$320
This Expedia deal was found by Cheapflights users on 7/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:29 pm
SEA
- BOS
Nonstop5h 25m
Multiple Airlines
Sat 9/1211:20 am
BOS
- SEA
1 stop12h 22m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 7/20. 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.
Tue 9/2211:06 pm
SEA
- BOS
Nonstop5h 33m
Alaska Airlines
Wed 9/2310:03 am
BOS
- SEA
Nonstop6h 12m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$322
This Super.com deal was found by Cheapflights users on 7/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Tue 9/17:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 7/20![JetBlue logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 7/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3011:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Wed 10/76:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 7/19![JetBlue logo]()
$324
This Trip.com deal was found by Cheapflights users on 7/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:40 pm
SEA
- BOS
1 stop9h 29m
Alaska Airlines
Sat 9/127:59 pm
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$325
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 July 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 July 21, 2026.
This Southwest deal was found by Cheapflights users on 7/20. 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 8/2611:05 pm
SEA
- BOS
1 stop6h 55m
Southwest
Tue 9/15:35 am
BOS
- SEA
2 stops10h 45m
Southwest
Deal found 7/20![Southwest logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 9/197:40 am
SEA
- BOS
Nonstop5h 44m
Alaska Airlines
Sat 9/197:59 pm
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$357
This JetBlue deal was found by Cheapflights users on 7/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Mon 10/121:00 pm
BOS
- SEA
1 stop11h 15m
JetBlue
Deal found 7/16![JetBlue logo]()
$381
This Delta deal was found by Cheapflights users on 7/19. 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 8/183:59 pm
SEA
- BOS
Nonstop5h 18m
Delta
Mon 8/247:35 pm
BOS
- SEA
Nonstop6h 36m
Delta
Deal found 7/19![Delta logo]()
$427
This United Airlines deal was found by Cheapflights users on 7/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:13 pm
SEA
- BOS
1 stop8h 51m
United Airlines
Tue 10/209:23 am
BOS
- SEA
2 stops14h 14m
United Airlines
Deal found 7/20![United Airlines logo]()
$429
This Southwest deal was found by Cheapflights users on 7/20. 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.
Mon 8/317:25 pm
SEA
- BOS
2 stops11h 30m
Southwest
Tue 9/89:05 am
BOS
- SEA
1 stop14h 55m
Southwest
Deal found 7/20![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 7/17. 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.
Tue 8/118:30 am
SEA
- BOS
1 stop12h 55m
Southwest
Tue 8/185:25 am
BOS
- SEA
1 stop10h 35m
Southwest
Deal found 7/17![Southwest logo]()
$362
This JetBlue deal was found by Cheapflights users on 7/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Fri 10/161:00 pm
BOS
- SEA
1 stop11h 15m
JetBlue
Deal found 7/16![JetBlue logo]()
$423
This Southwest deal was found by Cheapflights users on 7/20. 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 8/267:30 pm
SEA
- BOS
2 stops11h 20m
Southwest
Mon 8/319:40 am
BOS
- SEA
2 stops10h 55m
Southwest
Deal found 7/20![Southwest logo]()
$363
This Southwest deal was found by Cheapflights users on 7/17. 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.
Fri 8/149:10 am
SEA
- BOS
1 stop12h 15m
Southwest
Tue 8/185:25 am
BOS
- SEA
1 stop10h 35m
Southwest
Deal found 7/17![Southwest logo]()
$372
This Southwest deal was found by Cheapflights users on 7/20. 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 9/306:40 am
SEA
- BOS
2 stops11h 45m
Southwest
Sun 10/45:25 am
BOS
- SEA
2 stops11h 20m
Southwest
Deal found 7/20![Southwest logo]()
$377
This Southwest deal was found by Cheapflights users on 7/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:30 am
SEA
- BOS
2 stops10h 10m
Southwest
Sun 9/68:45 am
BOS
- SEA
2 stops12h 00m
Southwest
Deal found 7/16![Southwest logo]()
$398
Last-minute flights from Seattle to FalmouthDiscover last-minute flight deals from Seattle to Falmouth. Data last updated July 21, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Falmouth. Data last updated July 21, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/18. 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.
Tue 8/1111:13 pm
SEA
- BOS
Nonstop5h 22m
Delta
Tue 8/257:45 am
BOS
- SEA
Nonstop6h 23m
Delta
Deal found 7/18![Delta logo]()
$327
This United Airlines deal was found by Cheapflights users on 7/18. 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.
Tue 8/119:05 am
SEA
- BOS
1 stop8h 57m
United Airlines
Mon 8/317:45 am
BOS
- SEA
1 stop8h 37m
United Airlines
Deal found 7/18![United Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 7/20. 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 8/139:10 am
SEA
- BOS
1 stop12h 15m
Southwest
Tue 8/185:25 am
BOS
- SEA
1 stop10h 35m
Southwest
Deal found 7/20![Southwest logo]()
$337
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Wed 8/191:57 pm
SEA
- BOS
1 stop8h 14m
United Airlines
Mon 8/2410:38 am
BOS
- SEA
1 stop8h 29m
United Airlines
Deal found 7/17![United Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 7/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:10 am
SEA
- BOS
1 stop8h 36m
American Airlines
Tue 9/19:16 am
BOS
- SEA
1 stop10h 04m
American Airlines
Deal found 7/19![American Airlines logo]()
$314
This Super.com deal was found by Cheapflights users on 7/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Tue 9/17:30 pm
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 7/21![JetBlue logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 7/16. 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 8/2611:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Thu 8/2712:44 pm
BOS
- SEA
1 stop11h 24m
JetBlue
Deal found 7/16![JetBlue logo]()
$328
This United Airlines deal was found by Cheapflights users on 7/18. 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 8/266:15 pm
SEA
- BOS
1 stop8h 44m
United Airlines
Sun 8/306:07 pm
BOS
- SEA
1 stop8h 37m
United Airlines
Deal found 7/18![United Airlines logo]()
$333
This JetBlue deal was found by Cheapflights users on 7/18. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Tue 9/112:57 pm
BOS
- SEA
1 stop11h 11m
JetBlue
Deal found 7/18![JetBlue logo]()
$330
This United Airlines deal was found by Cheapflights users on 7/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:00 pm
SEA
- BOS
1 stop7h 36m
United Airlines
Sun 9/65:01 pm
BOS
- SEA
1 stop8h 42m
United Airlines
Deal found 7/16![United Airlines logo]()
$341
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 July 21, 2026.
Search for one-way flight options from Seattle to Falmouth. Find affordable one-way fares based on user searches. Data last updated July 21, 2026.
This Super.com deal was found by Cheapflights users on 7/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Deal found 7/20![JetBlue logo]()
$185
This Super.com deal was found by Cheapflights users on 7/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:40 am
SEA
- BOS
Nonstop5h 29m
JetBlue
Deal found 7/19![JetBlue logo]()
$186
This Cheapflightsfares deal was found by Cheapflights users on 7/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:40 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Deal found 7/19![JetBlue logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Sun 9/62:37 pm
SEA
- BOS
2 stops18h 10m
Frontier
Deal found 7/20![Frontier logo]()
$188
This Southwest deal was found by Cheapflights users on 7/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:30 am
SEA
- BOS
2 stops10h 00m
Southwest
Deal found 7/18![Southwest logo]()
$189
This United Airlines deal was found by Cheapflights users on 7/18. 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.
Fri 8/216:10 pm
SEA
- BOS
1 stop8h 49m
United Airlines
Deal found 7/18![United Airlines logo]()
$190
This Trip.com deal was found by Cheapflights users on 7/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:29 pm
SEA
- BOS
Nonstop5h 25m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Thu 8/207:06 pm
SEA
- BOS
2 stops37h 41m
Frontier
Deal found 7/20![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/192:37 pm
SEA
- BOS
2 stops18h 10m
Frontier
Deal found 7/18![Frontier logo]()
$195
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Wed 8/129:05 am
SEA
- BOS
1 stop10h 54m
United Airlines
Deal found 7/17![United Airlines logo]()
$197
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 July 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $312 (Flighttix) |
One-way from | $185 (Super.com) |
Popular in | December |
Cheapest in | September |
Average price | $443 |
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 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
Wed 8/26
11:05 pm-9:00 am
1 stop6h 55m
Boston Logan Intl
Tue 9/1
5:35 am-1:20 pm
2 stops10h 45m
$352
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Mon 8/31
7:25 pm-9:55 am
2 stops11h 30m
Boston Logan Intl
Tue 9/8
9:05 am-9:00 pm
1 stop14h 55m
$353
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 9/19
7:40 am-4:24 pm
Nonstop5h 44m
Boston Logan Intl
Sat 9/19
7:59 pm-11:12 pm
Nonstop6h 13m
$357
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Tue 8/11
8:30 am-12:25 am
1 stop12h 55m
Boston Logan Intl
Tue 8/18
5:25 am-1:00 pm
1 stop10h 35m
$362
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 8/26
7:30 pm-9:50 am
2 stops11h 20m
Boston Logan Intl
Mon 8/31
9:40 am-5:35 pm
2 stops10h 55m
$363
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Fri 8/14
9:10 am-12:25 am
1 stop12h 15m
Boston Logan Intl
Tue 8/18
5:25 am-1:00 pm
1 stop10h 35m
$372
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 9/30
6:40 am-9:25 pm
2 stops11h 45m
Boston Logan Intl
Sun 10/4
5:25 am-1:45 pm
2 stops11h 20m
$377
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 10/7
9:40 pm-10:46 am
1 stop10h 06m
Boston Logan Intl
Mon 10/12
1:00 pm-9:15 pm
1 stop11h 15m
$381
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Thu 8/27
6:30 am-7:40 pm
2 stops10h 10m
Boston Logan Intl
Sun 9/6
8:45 am-5:45 pm
2 stops12h 00m
$398
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sun 10/4
9:40 pm-10:46 am
1 stop10h 06m
Boston Logan Intl
Fri 10/16
1:00 pm-9:15 pm
1 stop11h 15m
$423
Showing 1-10 of 24 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
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 21, 2026.
It’s optimal to fly from Seattle to Falmouth at noon. By choosing this option you can save up to 41% on the cost of your flight, compared to a flight in the morning.
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 21, 2026.
The most flights from SEA to FM5 are scheduled on a Monday (35 on average). You will have fewer flight options on Saturday, 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?
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 July 18, 2026.
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. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 21, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andUnited 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.
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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.
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
Complete your trip
Flights by cabin class
Other flight options
Other flights from Seattle
Popular flights
Top destinations
Alternative routes for Seattle to Falmouth
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Falmouth by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Falmouth by cabin class
Find flights from Seattle to Falmouth, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Falmouth flights
Browse other Seattle and Falmouth flight options. Last updated on July 21, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on July 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Falmouth flights
Consider these flights traveling from Seattle to Falmouth.
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 July 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$297 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$146 | Average$406 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$176 | Average$420 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$416 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$361 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$382 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$229 | Average$462 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$233 | Average$457 | FlexibilityNo cancel fee | On-time83% |