$109 Find Cheap Flights from Seattle to Falmouth

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Falmouth departing on 6/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Flights Deals

Cheap Flight Deals from Seattle to Falmouth (SEA-BOS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Falmouth that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Seattle to Falmouth

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Falmouth.
Discover the best prices for you by selecting your travel dates on KAYAK.
Spirit Airlines Logo
6:00 am - 4:24 pmSEA-BOS
31h 24m2 stops
Spirit Airlines Logo
3:49 pm - 12:10 amBOS-SEA
35h 21m2 stops
$234Spirit Airlines
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Thu, May 29 - Mon, Jun 2
JetBlue Logo
11:30 am - 7:57 pmSEA-BOS
5h 27mnonstop
JetBlue Logo
7:00 am - 10:19 amBOS-SEA
6h 19mnonstop
$237JetBlue
Find Deal
Thu, Sep 25 - Mon, Sep 29
Alaska Airlines Logo
3:40 pm - 12:06 amSEA-BOS
5h 26mnonstop
Alaska Airlines Logo
7:20 am - 10:33 amBOS-SEA
6h 13mnonstop
$242Alaska Airlines
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Mon, Jun 9 - Wed, Sep 3
Alaska Airlines Logo
5:59 pm - 7:40 amSEA-BOS
10h 41m1 stop
Alaska Airlines Logo
9:00 am - 12:09 pmBOS-SEA
6h 09mnonstop
$253Alaska Airlines
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Tue, May 27 - Tue, Jun 3
Delta Logo
10:11 pm - 6:40 amSEA-BOS
5h 29mnonstop
Delta Logo
5:32 pm - 8:50 pmBOS-SEA
6h 18mnonstop
$268Delta
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Sat, May 17 - Sat, May 24
American Airlines Logo
6:10 am - 8:53 pmSEA-BOS
11h 43m1 stop
American Airlines Logo
5:29 am - 2:19 pmBOS-SEA
11h 50m1 stop
$275American Airlines
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Sat, Aug 23 - Sat, Aug 30
American Airlines Logo
5:30 am - 5:41 pmSEA-BOS
9h 11m1 stop
American Airlines Logo
5:29 am - 2:19 pmBOS-SEA
11h 50m1 stop
$301American Airlines
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Fri, Jun 13 - Wed, Aug 6
Delta Logo
7:50 am - 4:27 pmSEA-BOS
5h 37mnonstop
Delta Logo
7:10 am - 10:41 amBOS-SEA
6h 31mnonstop
$327Delta
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Sun, Jun 15 - Tue, Sep 2
United Airlines Logo
10:55 am - 9:57 pmSEA-BOS
8h 02m1 stop
United Airlines Logo
6:00 am - 11:25 amBOS-SEA
8h 25m1 stop
$387United Airlines
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Sat, May 10 - Thu, May 15
United Airlines Logo
1:09 pm - 11:57 pmSEA-BOS
7h 48m1 stop
United Airlines Logo
4:20 pm - 10:18 pmBOS-SEA
8h 58m1 stop
$390United Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 13
Useful Info

Good to know

Low seasonFebruary
High seasonAugust
Cheapest flight$109
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 31% increase in price.
Flight from Seattle to Boston

When to book flights from Seattle to Falmouth

Are your dates flexible? Find out the best times to travel from Seattle to Falmouth based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Seattle to Falmouth

  • Which airports will I be using when flying from Seattle to Falmouth?

    When flying out of Seattle you’ll be using Seattle/Tacoma Intl. Falmouth does not have its own airport so you’ll be flying into nearby Boston Logan Intl airport, which is 59.7 mi away.

  • How long does a flight from Seattle to Falmouth take?

    Direct flights cover the 2,487 miles separating Seattle and Falmouth in about 5h 16m.

  • How many flights are there between Seattle and Falmouth?

    38 direct flights run between Seattle and Falmouth on a daily basis. On average, there are about 267 departures each week.

  • What’s the cheapest day of the week to fly between Seattle and Falmouth?

    Consider leaving on a Thursday and avoid Mondays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

  • How does KAYAK find such low prices on flights from Seattle to Falmouth?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Falmouth.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Falmouth?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Falmouth from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Falmouth?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Falmouth with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Falmouth?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Falmouth from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Seattle to Falmouth?

    In the last 72 hours, the cheapest one-way ticket between Seattle and Falmouth found on KAYAK was with Spirit Airlines for $109. Spirit Airlines offered a round-trip connection from $234 and JetBlue from $237.

Top tips for finding cheap flights from Seattle to Falmouth

  • There is no airport in Falmouth. Instead, you’ll be flying into Boston Logan Airport when flying between Seattle and Falmouth.
  • The cheapest flight from Seattle to Falmouth was found 80 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be June, July and August. The cheapest month to fly is January.

Top 5 airlines serving Seattle to Falmouth

Need help choosing which airline to fly with from Seattle to Falmouth? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9968 reviews
8.2Boarding
7.9Comfort
7.1Food
7.1Entertainment
8.5Crew
Airline reviews

I made a mistake. Read what I wrote in the flight from Dulles to SEA. The negative experience was from SEA to BOI. Total garbage. Wont do it again.

2.0 MediocreAnonymous, Apr 2025SEA - BOI
Read more Alaska Airlines reviews

I made a mistake. Read what I wrote in the flight from Dulles to SEA. The negative experience was from SEA to BOI. Total garbage. Wont do it again.

Need to get on train for second flight it’s much nicer when all the gates are together for obvious reasons

Cramped, crowded aircraft. Poorly organized boarding. Tasteless crackers to eat. 40 minutes late. A standard US air travel experience.

Would not mind having movie options an available like Delta, but is not necessary. Did not have food, so cannot appropriately rate that section.

Three hour flight so snacks and basic drinks unless you pre buy as usual. Didn’t do my emtertainment as was tired after 23 hours of travel. You have to use your own device on US flights if travelers aren’t aware so if you only use your cell phone that can be small. Crew are great.

Awful. We got the last seats and they don't recline. We've been on this horrible journey since 6am and won't get to our destination almost a full day later. Oh and no food, either. Never again.

An uneventful flight is a good experience although one of the pilots gauges wasn’t working right so we had a half hour delay—no one can foresee that.

Plane was delayed and got me in past bedtime. But more importantly, my tsa precheck number wasn’t on my ticket so had to deal with the general line. Oh well, guess the delay helped that situation.

It was as good as flying can be, which is still very uncomfortable. Clean new aircraft, great crew.

Everything was good. The flight attendants were great. I was disappointed that there wasn’t any screens on the back of the seats to watch movies, tv, etc. I only had my phone to watch movies on.

Delta is a cut above the others in customer service.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.

The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please

Newer plane, relatively easy boarding, not a full flight and was told that we could not be moved up because of weight and balance issues. Otherwise, a very good experience.

Other then mechanical/ computer problem and 3.5 hours flight delay the flight was great. I guess that what happened when you fly an old airplane now a day.

I think they can provide the better food/snack option for the 4 hours flight. Drinks are fine.

It was terrible, if they ran flights on time it would make a big difference.

Most of my discomfort was going through TSA. However, the Delta seats had inadequate leg room and I tried my very best to connect to the wi-fi and it was a cumbersome process that finally gave me the info that I needed to sign in AFTER I had completed the flight...Why make it so difficult to use? That said I really really appreciate the pilot taking a little extra time to avoid a bad storm area and both landings in Atlanta and Orlando were flawless to my delight!!!

Bottom seat cushion is almost non existent. Very uncomfortable seat.

A bit rush for transit. Food and entertainment are not available

Multiple delays and not straight answer from the United team

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

leg space better than expected. two washrooms for one plane isn't enough.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

Great flight. Departed early, arrived early. However they were out of meals for sale. Also, we arrived early and the gate was not available so we sat on the taxiway for quite a while (not JetBlue’s fault).

Cancelled flight with no specific instructions to get a boarding pass for another flight. The whole flight of people were in line for an hour because there was only 1 person to help at the desk. This was unusual for JetBlue.

It was too hot in the cabin. The AC did not help.

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Loved the leg room and tvs screens on the seats and free WiFi. Wish the price was lower and could save by rebooking

It took 1-1/2 hours to get our luggage after we landed. That to me is unacceptable

The flight was delayed for 4 hours. Once onboard the crew was wonderful.

Overall was excellent. Will definitely us JetBlue in the future.

Love the mosaic program, being able to move to an extra space seat for free is awesome

Several delays. Next flight was worse. Did not arrive home until 2am PT

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Took off on time and successfully avoided weather that looked to be a problem along the way

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

The flight to Tokyo AA61 took off about two hours late, but then had to turn back. By that time the crew had to be replaced. Then they kept promising to take off in an hour, then in 3, then switch to the next day.

Everything you need to know for your flight from Seattle to Falmouth

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