HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kos

$706+ Cheap flights from Massachusetts to Kos (KGS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — KGS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Massachusetts to Kos 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.

Cheap flight deals from Massachusetts to Kos

Keep the following information in mind while searching for Massachusetts to Kos flight deals. Data was last updated September 16, 2025.

Round-trip from

$706
(KAYAK)
From Massachusetts to Kos
Search Deals

Find flight deals from Massachusetts to Kos

Cheapest flights from Massachusetts to Kos
Explore the most affordable flight options available from Massachusetts to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/218:05 pmBOS - KGS
1 stop16h 00mLufthansa
Wed 11/56:55 pmKGS - BOS
1 stop30h 40mLufthansa
Deal found 9/14$706
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/215:05 pmBOS - KGS
1 stop19h 50mSWISS
Wed 11/52:30 pmKGS - BOS
2 stops36h 50mSWISS
Deal found 9/14$721
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:00 pmBOS - KGS
1 stop13h 40mLufthansa
Wed 11/56:55 pmKGS - BOS
1 stop30h 40mLufthansa
Deal found 9/14$729
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/218:05 pmBOS - KGS
1 stop16h 00mLufthansa
Sat 11/88:15 pmKGS - BOS
1 stop29h 20mLufthansa
Deal found 9/14$756
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:05 pmBOS - KGS
1 stop15h 05mSWISS
Wed 11/52:30 pmKGS - BOS
2 stops36h 50mSWISS
Deal found 9/14$771
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:50 pmBOS - KGS
1 stop17h 50mLufthansa
Sat 11/88:15 pmKGS - BOS
1 stop29h 20mLufthansa
Deal found 9/14$779
This Ovago deal was found by Cheapflights users on 9/14. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:05 pmBOS - KGS
1 stop16h 20mLufthansa
Sat 11/88:15 pmKGS - BOS
1 stop29h 20mLufthansa
Deal found 9/14$783

Cheapflights Fare Finder

 
Customize your flight search to find flights from Massachusetts to Kos 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 September 16, 2025.
Use the filters below to find and compare flights from Massachusetts to Kos that are best for you.

Fly from

Massachusetts

Fly to

Kos

Route

Depart

Return

Price

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 10/21

8:05 pm-7:05 pm

1 stop16h 00m

Kos

Sat 11/8

8:15 pm-6:35 pm

1 stop29h 20m

$756

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Wed 10/22

5:50 pm-6:40 pm

1 stop17h 50m

Kos

Sat 11/8

8:15 pm-6:35 pm

1 stop29h 20m

$779

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Fri 10/24

8:05 pm-7:25 pm

1 stop16h 20m

Kos

Sat 11/8

8:15 pm-6:35 pm

1 stop29h 20m

$783

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 10/23

8:05 pm-8:50 am

2 stops29h 45m

Kos

Wed 11/5

6:55 pm-1:25 pm

2 stops25h 30m

$827

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Fri 10/24

9:25 pm-9:30 pm

1 stop17h 05m

Kos

Thu 11/6

9:45 pm-1:55 pm

2 stops23h 10m

$918

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 10/23

5:05 pm-5:30 pm

2 stops17h 25m

Kos

Thu 11/6

9:45 pm-1:45 pm

2 stops23h 00m

$1,038

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Wed 10/22

10:00 pm-6:40 pm

1 stop13h 40m

Kos

Fri 11/7

8:40 pm-8:55 pm

2 stops31h 15m

$1,326

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Best time to book a flight from Massachusetts to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Massachusetts with our price prediction graph.
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 Massachusetts to Kos
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Massachusetts to Kos. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Kos from Massachusetts?

    For a flight from Massachusetts to Kos, you will be flying into Kos. Kos (KGS) is just 12.8 mi from the center of the city.

  • How long is the flight from Massachusetts to Kos?

    Departing from Massachusetts to Kos will take you 16h. Massachusetts and Kos are separated by a distance of 4924 mi.

  • Can I find deals for flights from Massachusetts to Kos that include hotel bookings?

    Yes. In addition to deals on Massachusetts to Kos flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Massachusetts to Kos?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Massachusetts to Kos.

  • Can I find deals for business class flights from Massachusetts to Kos?

    Yes. Cheapflights offers flight deals from Massachusetts to Kos by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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 for Massachusetts to Kos

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Santorini flights
Newark to Santorini flights
LaGuardia to Santorini flights
John F Kennedy Intl to Mykonos flights
O'Hare Intl to Santorini flights
Los Angeles to Santorini flights
San Francisco to Santorini flights
Sky Harbor Intl to Santorini flights
Dallas/Fort Worth to Santorini flights
Dallas/Fort Worth to Mykonos flights
Orlando to Santorini flights
Los Angeles to Mykonos flights
Orlando to Mykonos flights
Atlanta to Santorini flights
Denver to Santorini flights
Dulles Intl to Mykonos flights
Dulles Intl to Santorini flights
Boston to Mykonos flights
Newark to Mykonos flights
O'Hare Intl to Mykonos flights
John F Kennedy Intl to Rhodes flights
Hobby to Mykonos flights
Indianapolis to Santorini flights
Seattle to Santorini flights
Los Angeles to Rhodes flights
Newark to Karpathos flights
LaGuardia to Mykonos flights
Nashville to Santorini flights
Boston to Santorini flights
Reagan-National to Santorini flights
Hobby to Santorini flights
George Bush Intcntl to Santorini flights
O'Hare Intl to Kos flights
Newark to Rhodes flights
Cleveland to Mykonos flights
Reagan-National to Mykonos flights
San Francisco to Mykonos flights
Charlotte to Santorini flights
Tampa to Santorini flights
Baltimore to Mykonos flights
LaGuardia to Rhodes flights
Detroit to Mykonos flights
George Bush Intcntl to Mykonos flights
Miami to Santorini flights
Philadelphia to Santorini flights
Raleigh to Santorini flights
St. Louis to Santorini flights
John F Kennedy Intl to Kos flights
Atlanta to Mykonos flights

Top 2 airlines flying from Massachusetts to Kos

Discover the top 2 airlines that operate flights from Massachusetts to Kos. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$954Average$1,151FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$981Average$1,081FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.