$168+ Cheap flights from Seattle (SEA) to Falmouth, MA, MA
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Jul 27 — Aug 31
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 June 27, 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 June 27, 2026.
This American Airlines deal was found by Cheapflights users on 6/27. 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 10/2010:35 pm
SEA
- BOS
1 stop10h 42m
American Airlines
Mon 10/265:14 pm
BOS
- SEA
1 stop8h 39m
American Airlines
Deal found 6/27![American Airlines logo]()
$310
This Cheapflightsfares deal was found by Cheapflights users on 6/23. 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.
Fri 9/2511:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Sat 9/261:00 pm
BOS
- SEA
1 stop10h 42m
JetBlue
Deal found 6/23![JetBlue logo]()
$312
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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 9/169:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Sun 9/206:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 6/24![JetBlue logo]()
$313
This Super.com deal was found by Cheapflights users on 6/26. 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 9/2511:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Tue 10/66:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 6/26![JetBlue logo]()
$314
This JetBlue deal was found by Cheapflights users on 6/23. 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 8/2611:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Wed 9/91:00 pm
BOS
- SEA
1 stop10h 42m
JetBlue
Deal found 6/23![JetBlue logo]()
$315
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 9/226:51 pm
SEA
- BOS
1 stop8h 18m
Alaska Airlines
Wed 9/2310:03 am
BOS
- SEA
Nonstop6h 12m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 6/26. 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 9/111:13 pm
SEA
- BOS
Nonstop5h 22m
Delta
Sat 9/56:45 pm
BOS
- SEA
Nonstop6h 35m
Delta
Deal found 6/26![Delta logo]()
$317
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:10 am
SEA
- BOS
1 stop9h 54m
American Airlines
Tue 8/113:20 pm
BOS
- SEA
1 stop10h 36m
American Airlines
Deal found 6/24![American Airlines logo]()
$320
This JetBlue deal was found by Cheapflights users on 6/26. 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.
Mon 9/219:40 pm
SEA
- BOS
1 stop10h 06m
JetBlue
Sat 10/176:59 pm
BOS
- SEA
Nonstop6h 39m
JetBlue
Deal found 6/26![JetBlue logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:51 pm
SEA
- BOS
1 stop8h 18m
Alaska Airlines
Tue 9/297:12 am
BOS
- SEA
Nonstop6h 13m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$322
This lol.travel deal was found by Cheapflights users on 6/24. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1311:46 pm
SEA
- BOS
Nonstop5h 18m
JetBlue
Tue 7/217:10 am
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 6/24![JetBlue logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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.
Tue 8/2511:45 pm
SEA
- BOS
Nonstop5h 19m
JetBlue
Wed 8/2612:44 pm
BOS
- SEA
1 stop11h 24m
JetBlue
Deal found 6/24![JetBlue logo]()
$324
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 June 27, 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 June 27, 2026.
This Delta deal was found by Cheapflights users on 6/25. 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 8/1211:15 am
SEA
- BOS
Nonstop5h 28m
Delta
Wed 8/197:35 pm
BOS
- SEA
Nonstop6h 36m
Delta
Deal found 6/25![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 6/24. 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 8/299:20 am
SEA
- BOS
1 stop12h 05m
Southwest
Wed 9/22:45 pm
BOS
- SEA
2 stops11h 40m
Southwest
Deal found 6/24![Southwest logo]()
$332
This JetBlue deal was found by Cheapflights users on 6/25. 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 8/1210:13 pm
SEA
- BOS
1 stop10h 12m
JetBlue
Wed 8/197:09 am
BOS
- SEA
Nonstop6h 21m
JetBlue
Deal found 6/25![JetBlue logo]()
$357
This United Airlines deal was found by Cheapflights users on 6/26. 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 9/157:00 am
SEA
- BOS
1 stop9h 19m
United Airlines
Tue 9/227:20 am
BOS
- SEA
2 stops17h 11m
United Airlines
Deal found 6/26![United Airlines logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:45 pm
SEA
- BOS
1 stop9h 55m
Alaska Airlines
Thu 8/2010:03 am
BOS
- SEA
Nonstop6h 12m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:15 am
SEA
- BOS
2 stops11h 25m
Southwest
Sat 9/265:30 am
BOS
- SEA
2 stops10h 40m
Southwest
Deal found 6/22![Southwest logo]()
$353
This Delta deal was found by Cheapflights users on 6/26. 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 10/2111:50 am
SEA
- BOS
Nonstop5h 33m
Delta
Mon 10/267:05 am
BOS
- SEA
Nonstop6h 38m
Delta
Deal found 6/26![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 6/26. 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 9/59:05 am
SEA
- BOS
2 stops11h 54m
United Airlines
Sat 9/197:45 am
BOS
- SEA
1 stop11h 29m
United Airlines
Deal found 6/26![United Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 6/22. 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 9/1911:00 pm
SEA
- BOS
2 stops10h 40m
Southwest
Mon 9/285:50 am
BOS
- SEA
2 stops11h 05m
Southwest
Deal found 6/22![Southwest logo]()
$368
This Delta deal was found by Cheapflights users on 6/22. 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
Tue 8/257:45 am
BOS
- SEA
Nonstop6h 23m
Delta
Deal found 6/22![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 6/26. 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 7/307:30 pm
SEA
- BOS
2 stops9h 40m
Southwest
Wed 8/129:05 am
BOS
- SEA
1 stop14h 55m
Southwest
Deal found 6/26![Southwest logo]()
$397
This Delta deal was found by Cheapflights users on 6/23. 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 7/1111:15 pm
SEA
- BOS
Nonstop5h 20m
Delta
Thu 7/167:53 am
BOS
- SEA
Nonstop6h 23m
Delta
Deal found 6/23![Delta logo]()
$412
Last-minute flights from Seattle to FalmouthDiscover last-minute flight deals from Seattle to Falmouth. Data last updated June 27, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Falmouth. Data last updated June 27, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 6/25. 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 7/1011:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Wed 7/227:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/25![JetBlue logo]()
$333
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:10 am
SEA
- BOS
1 stop9h 54m
American Airlines
Tue 8/113:20 pm
BOS
- SEA
1 stop10h 36m
American Airlines
Deal found 6/24![American Airlines logo]()
$320
This lol.travel deal was found by Cheapflights users on 6/24. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1311:46 pm
SEA
- BOS
Nonstop5h 18m
JetBlue
Tue 7/217:10 am
BOS
- SEA
Nonstop6h 23m
JetBlue
Deal found 6/24![JetBlue logo]()
$323
This Delta deal was found by Cheapflights users on 6/23. 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 7/154:00 pm
SEA
- BOS
Nonstop5h 14m
Delta
Tue 7/217:29 pm
BOS
- SEA
Nonstop6h 33m
Delta
Deal found 6/23![Delta logo]()
$317
This American Airlines deal was found by Cheapflights users on 6/26. 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 7/2810:35 pm
SEA
- BOS
1 stop8h 20m
American Airlines
Tue 8/45:05 pm
BOS
- SEA
1 stop8h 51m
American Airlines
Deal found 6/26![American Airlines logo]()
$337
This Cheapflightsfares deal was found by Cheapflights users on 6/22. 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.
Tue 7/2810:19 pm
SEA
- BOS
1 stop10h 14m
JetBlue
Tue 8/47:29 pm
BOS
- SEA
Nonstop6h 25m
JetBlue
Deal found 6/22![JetBlue logo]()
$338
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 June 27, 2026.
Search for one-way flight options from Seattle to Falmouth. Find affordable one-way fares based on user searches. Data last updated June 27, 2026.
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:58 pm
SEA
- BOS
1 stop8h 49m
American Airlines
Deal found 6/24![American Airlines logo]()
$168
This American Airlines deal was found by Cheapflights users on 6/23. 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 12/56:00 am
SEA
- BOS
1 stop8h 00m
American Airlines
Deal found 6/23![American Airlines logo]()
$169
This United Airlines deal was found by Cheapflights users on 6/26. 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 7/151:55 pm
SEA
- BOS
1 stop8h 19m
United Airlines
Deal found 6/26![United Airlines logo]()
$170
This Cheapflightsfares deal was found by Cheapflights users on 6/25. 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 7/2911:45 am
SEA
- BOS
Nonstop5h 28m
JetBlue
Deal found 6/25![JetBlue logo]()
$171
This American Airlines deal was found by Cheapflights users on 6/23. 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 11/612:15 pm
SEA
- BOS
1 stop7h 26m
American Airlines
Deal found 6/23![American Airlines logo]()
$174
This American Airlines deal was found by Cheapflights users on 6/26. 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 12/1010:34 am
SEA
- BOS
1 stop9h 24m
American Airlines
Deal found 6/26![American Airlines logo]()
$175
This Cheapflightsfares deal was found by Cheapflights users on 6/23. 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.
Fri 9/1111:55 pm
SEA
- BOS
Nonstop5h 24m
JetBlue
Deal found 6/23![JetBlue logo]()
$176
This Southwest deal was found by Cheapflights users on 6/23. 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 8/229:20 am
SEA
- BOS
1 stop12h 05m
Southwest
Deal found 6/23![Southwest logo]()
$179
This Southwest deal was found by Cheapflights users on 6/24. 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
Deal found 6/24![Southwest logo]()
$180
This United Airlines deal was found by Cheapflights users on 6/24. 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 7/1011:00 pm
SEA
- BOS
1 stop9h 16m
United Airlines
Deal found 6/24![United Airlines logo]()
$184
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:15 am
SEA
- BOS
2 stops10h 10m
Southwest
Deal found 6/23![Southwest logo]()
$185
This SmartFares deal was found by Cheapflights users on 6/22. 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.
Sat 7/2511:21 pm
SEA
- BOS
Nonstop5h 18m
JetBlue
Deal found 6/22![JetBlue logo]()
$187
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 June 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $310 (American Airlines) |
One-way from | $168 (American Airlines) |
Popular in | December |
Cheapest in | September |
Average price | $452 |
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 June 27, 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 8/12
11:15 am-7:43 pm
Nonstop5h 28m
Boston Logan Intl
Wed 8/19
7:35 pm-11:11 pm
Nonstop6h 36m
$317
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 8/29
9:20 am-12:25 am
1 stop12h 05m
Boston Logan Intl
Wed 9/2
2:45 pm-11:25 pm
2 stops11h 40m
$332
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Thu 9/17
5:15 am-7:40 pm
2 stops11h 25m
Boston Logan Intl
Sat 9/26
5:30 am-1:10 pm
2 stops10h 40m
$353
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 8/12
10:13 pm-11:25 am
1 stop10h 12m
Boston Logan Intl
Wed 8/19
7:09 am-10:30 am
Nonstop6h 21m
$357
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 10/21
11:50 am-8:23 pm
Nonstop5h 33m
Boston Logan Intl
Mon 10/26
7:05 am-10:43 am
Nonstop6h 38m
$357
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 9/19
11:00 pm-12:40 pm
2 stops10h 40m
Boston Logan Intl
Mon 9/28
5:50 am-1:55 pm
2 stops11h 05m
$368
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Tue 9/15
7:00 am-7:19 pm
1 stop9h 19m
Boston Logan Intl
Tue 9/22
7:20 am-9:31 pm
2 stops17h 11m
$384
Quickest round-trip
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Tue 8/18
3:59 pm-12:17 am
Nonstop5h 18m
Boston Logan Intl
Tue 8/25
7:45 am-11:08 am
Nonstop6h 23m
$387
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Sat 9/5
9:05 am-11:59 pm
2 stops11h 54m
Boston Logan Intl
Sat 9/19
7:45 am-4:14 pm
1 stop11h 29m
$388
SeattleBoston
SEA - BOS
SEABOS
Seattle/Tacoma Intl
Wed 8/12
4:45 pm-5:40 am
1 stop9h 55m
Boston Logan Intl
Thu 8/20
10:03 am-1:15 pm
Nonstop6h 12m
$397
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
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 June 27, 2026.
It’s optimal to fly from Seattle to Falmouth at noon. By choosing this option you can save up to 43% 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 June 27, 2026.
The most flights from SEA to FM5 are scheduled on a Wednesday (41 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 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 June 27, 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 June 27, 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
Crew
8.5
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Crew
8.5
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Crew
8.5
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Crew
8.5
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Crew
8.5
Entertainment
7.0
Comfort
7.8
Food
7.0
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Crew
8.5
Entertainment
7.0
Comfort
7.8
Food
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.
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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 June 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$295 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$141 | Average$365 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$172 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$420 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$194 | Average$343 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$393 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$231 | Average$458 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$233 | Average$457 | FlexibilityNo cancel fee | On-time83% |