$184+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Sep 7 — Sep 141
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 84 days in advance, depart on a Tuesday or Wednesday 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 August 8, 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 August 8, 2026.
This American Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1410:45 pm -
1 stop10h 33m
Mon 9/214:29 pm -
1 stop10h 42m
Deal found 8/4![American Airlines logo]()
$316
This American Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:40 am -
1 stop9h 00m
Fri 9/184:29 pm -
1 stop10h 42m
Deal found 8/3![American Airlines logo]()
$317
This Cheapflightsfares deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:55 pm -
Nonstop5h 24m
Tue 10/136:59 pm -
Nonstop6h 39m
Deal found 8/3![JetBlue logo]()
$319
This American Airlines deal was found by Cheapflights users on 8/2. 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 9/85:50 am -
1 stop9h 50m
Tue 9/228:54 am -
1 stop9h 23m
Deal found 8/2![American Airlines logo]()
$320
This American Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:50 am -
1 stop9h 50m
Tue 9/85:45 pm -
1 stop9h 14m
Deal found 8/4![American Airlines logo]()
$322
This American Airlines deal was found by Cheapflights users on 8/2. 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 8/259:58 pm -
1 stop7h 48m
Tue 9/13:20 pm -
1 stop10h 36m
Deal found 8/2![American Airlines logo]()
$323
This Cheapflightsfares deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:40 am -
Nonstop5h 56m
Sat 9/127:20 pm -
Nonstop6h 17m
Deal found 8/5![JetBlue logo]()
$324
This JetBlue deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:40 pm -
Nonstop5h 19m
Sun 9/207:20 pm -
Nonstop6h 17m
Deal found 8/6![JetBlue logo]()
$325
This Travelocity deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:43 am -
1 stop16h 26m
Thu 9/107:20 pm -
Nonstop6h 17m
Deal found 8/6![Multiple Airlines logo]()
$326
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:15 am -
1 stop12h 15m
Sat 9/265:40 am -
1 stop10h 30m
Deal found 8/5![Southwest logo]()
$327
This American Airlines deal was found by Cheapflights users on 8/7. 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 9/1011:57 pm -
1 stop7h 32m
Wed 9/168:33 am -
1 stop9h 18m
Deal found 8/7![American Airlines logo]()
$328
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 August 8, 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 August 8, 2026.
This United Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:58 pm -
1 stop7h 50m
Tue 9/152:00 pm -
1 stop9h 43m
Deal found 8/6![United Airlines logo]()
$330
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:05 pm -
1 stop7h 50m
Tue 9/292:45 pm -
2 stops11h 45m
Deal found 8/5![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:13 pm -
Nonstop5h 22m
Thu 9/37:35 pm -
Nonstop6h 36m
Deal found 8/3![Delta logo]()
$392
This Alaska Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:51 pm -
1 stop8h 18m
Mon 9/287:59 pm -
Nonstop6h 13m
Deal found 8/3![Alaska Airlines logo]()
$402
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:05 pm -
1 stop6h 55m
Tue 9/152:45 pm -
2 stops11h 45m
Deal found 8/6![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:10 am -
1 stop9h 20m
Wed 11/41:10 pm -
2 stops12h 20m
Deal found 8/5![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:50 pm -
2 stops10h 50m
Tue 11/31:20 pm -
2 stops13h 10m
Deal found 8/4![Southwest logo]()
$337
This Southwest deal was found by Cheapflights users on 8/7. 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 11/116:10 am -
2 stops12h 40m
Mon 11/167:55 am -
2 stops13h 45m
Deal found 8/7![Southwest logo]()
$340
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:05 pm -
1 stop10h 20m
Fri 9/1811:15 am -
2 stops14h 45m
Deal found 8/6![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:05 pm -
2 stops10h 25m
Wed 9/93:20 pm -
2 stops10h 50m
Deal found 8/6![Southwest logo]()
$377
This Southwest deal was found by Cheapflights users on 8/7. 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 9/1011:00 pm -
2 stops12h 55m
Wed 9/163:20 pm -
2 stops10h 50m
Deal found 8/7![Southwest logo]()
$378
Last-minute flights from Seattle to FalmouthDiscover last-minute flight deals from Seattle to Falmouth. Data last updated August 8, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Falmouth. Data last updated August 8, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/2. 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 8/259:58 pm -
1 stop7h 48m
Tue 9/13:20 pm -
1 stop10h 36m
Deal found 8/2![American Airlines logo]()
$323
This American Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:50 am -
1 stop9h 50m
Tue 9/85:45 pm -
1 stop9h 14m
Deal found 8/4![American Airlines logo]()
$322
This Cheapflightsfares deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:40 am -
Nonstop5h 56m
Sat 9/127:20 pm -
Nonstop6h 17m
Deal found 8/5![JetBlue logo]()
$324
This JetBlue deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:40 pm -
Nonstop5h 19m
Sun 9/207:20 pm -
Nonstop6h 17m
Deal found 8/6![JetBlue logo]()
$325
This Travelocity deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:43 am -
1 stop16h 26m
Thu 9/107:20 pm -
Nonstop6h 17m
Deal found 8/6![Multiple Airlines logo]()
$326
This American Airlines deal was found by Cheapflights users on 8/2. 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 9/85:50 am -
1 stop9h 50m
Tue 9/228:54 am -
1 stop9h 23m
Deal found 8/2![American Airlines logo]()
$320
This American Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:40 am -
1 stop9h 00m
Fri 9/184:29 pm -
1 stop10h 42m
Deal found 8/3![American Airlines logo]()
$317
This American Airlines deal was found by Cheapflights users on 8/7. 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 9/1011:57 pm -
1 stop7h 32m
Wed 9/168:33 am -
1 stop9h 18m
Deal found 8/7![American Airlines logo]()
$328
This American Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1410:45 pm -
1 stop10h 33m
Mon 9/214:29 pm -
1 stop10h 42m
Deal found 8/4![American Airlines logo]()
$316
This Cheapflightsfares deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:42 pm -
Nonstop5h 24m
Sun 9/277:20 pm -
Nonstop6h 17m
Deal found 8/3![JetBlue logo]()
$319
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:15 am -
1 stop12h 15m
Sat 9/265:40 am -
1 stop10h 30m
Deal found 8/5![Southwest logo]()
$327
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 August 8, 2026.
Search for one-way flight options from Seattle to Falmouth. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
This Southwest deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:05 pm -
2 stops10h 25m
Deal found 8/3![Southwest logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/182:37 pm -
2 stops18h 10m
Deal found 8/3![Frontier logo]()
$186
This JetBlue deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:15 pm -
1 stop9h 31m
Deal found 8/3![JetBlue logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:37 pm -
2 stops18h 10m
Deal found 8/3![Frontier logo]()
$188
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:30 am -
1 stop12h 55m
Deal found 8/5![Southwest logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:35 pm -
2 stops19h 12m
Deal found 8/3![Frontier logo]()
$190
This JetBlue deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:40 pm -
1 stop10h 11m
Deal found 8/5![JetBlue logo]()
$191
This Cheapflightsfares deal was found by Cheapflights users on 8/2. 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 8/2811:40 am -
Nonstop5h 29m
Deal found 8/2![JetBlue logo]()
$192
This American Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:28 pm -
1 stop8h 44m
Deal found 8/3![American Airlines logo]()
$193
This Delta deal was found by Cheapflights users on 8/7. 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 9/97:16 am -
Nonstop5h 37m
Deal found 8/7![Delta logo]()
$194
This Expedia deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1411:45 pm -
Nonstop5h 19m
Deal found 8/6![JetBlue logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/239:29 pm -
2 stops35h 18m
Deal found 8/3![Frontier logo]()
$196
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 August 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $316 (American Airlines) |
One-way from | $184 (Southwest) |
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 August 8, 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 Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Tue 9/8
10:58 pm-9:48 am
1 stop7h 50m
Boston Logan Intl
Tue 9/15
2:00 pm-8:43 pm
1 stop9h 43m
$330
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Mon 9/28
11:05 pm-9:55 am
1 stop7h 50m
Boston Logan Intl
Tue 9/29
2:45 pm-11:30 pm
2 stops11h 45m
$332
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Wed 9/9
11:05 pm-9:00 am
1 stop6h 55m
Boston Logan Intl
Tue 9/15
2:45 pm-11:30 pm
2 stops11h 45m
$332
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Tue 10/27
12:10 am-12:30 pm
1 stop9h 20m
Boston Logan Intl
Wed 11/4
1:10 pm-10:30 pm
2 stops12h 20m
$332
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Fri 10/30
6:50 pm-8:40 am
2 stops10h 50m
Boston Logan Intl
Tue 11/3
1:20 pm-11:30 pm
2 stops13h 10m
$337
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Wed 11/11
6:10 am-9:50 pm
2 stops12h 40m
Boston Logan Intl
Mon 11/16
7:55 am-6:40 pm
2 stops13h 45m
$340
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Fri 9/11
11:05 pm-12:25 pm
1 stop10h 20m
Boston Logan Intl
Fri 9/18
11:15 am-11:00 pm
2 stops14h 45m
$347
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Wed 9/2
11:05 pm-12:30 pm
2 stops10h 25m
Boston Logan Intl
Wed 9/9
3:20 pm-11:10 pm
2 stops10h 50m
$377
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Thu 9/10
11:00 pm-2:55 pm
2 stops12h 55m
Boston Logan Intl
Wed 9/16
3:20 pm-11:10 pm
2 stops10h 50m
$378
Quickest round-trip
SeattleBoston
SEA Seattle/Tacoma Intl - BOS Boston Logan Intl
SEABOS
Seattle/Tacoma Intl
Tue 9/1
11:13 pm-7:35 am
Nonstop5h 22m
Boston Logan Intl
Thu 9/3
7:35 pm-11:11 pm
Nonstop6h 36m
$392
Showing 1-10 of 22 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 August 8, 2026.
It’s optimal to fly from Seattle to Falmouth at noon. By choosing this option you can save up to 39% 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 August 8, 2026.
The most flights from SEA to FM5 are scheduled on a Thursday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).
How much does it cost to fly round-trip from Seattle to Falmouth?
Airfare is below average for this route at the moment.
Seattle to Falmouth flights typically cost between $354 and $559 in September.The cheapest round-trip price found within the last 5 days was $316 on American Airlines (Sep 14-Sep 21).
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 August 1, 2026.
Travelers seeking maximum savings on their Seattle to Falmouth flight should consider departing on Tuesday 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 August 8, 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.
Comfort
7.8
Crew
8.5
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Crew
8.5
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Crew
8.5
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Crew
8.5
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Crew
8.5
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Crew
8.5
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
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 August 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$333 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$153 | Average$488 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$178 | Average$415 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$182 | Average$423 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$194 | Average$371 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$382 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$233 | Average$457 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$236 | Average$469 | FlexibilityNo cancel fee | On-time75% |