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Cheap flights from Massachusetts to Kos from $949

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Massachusetts to Kos departing on 8/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Massachusetts to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
9:40 pm - 7:55 pm
BOS
-
KGS
15h 15m
1 stop
SWISS Logo
11:00 am - 7:55 pm
KGS
-
BOS
15h 55m
1 stop
$949SWISS
Tue, Aug 11 - Thu, Aug 20
Multiple Airlines Logo
7:23 pm - 7:05 pm
BOS
-
KGS
16h 42m
2 stops
Multiple Airlines Logo
11:00 am - 7:55 pm
KGS
-
BOS
15h 55m
1 stop
$1,009Multiple Airlines
Tue, Aug 11 - Thu, Aug 20
Multiple Airlines Logo
8:05 pm - 7:45 pm
BOS
-
KGS
16h 40m
1 stop
Multiple Airlines Logo
11:00 am - 3:10 pm
KGS
-
BOS
35h 10m
1 stop
$1,075Multiple Airlines
Fri, Jul 31 - Mon, Aug 31
Multiple Airlines Logo
4:45 pm - 10:10 am
BOS
-
KGS
34h 25m
3 stops
Multiple Airlines Logo
11:00 am - 2:45 pm
KGS
-
BOS
34h 45m
3 stops
$1,083Multiple Airlines
Tue, Aug 11 - Thu, Aug 20
Lufthansa Logo
8:05 pm - 7:45 pm
BOS
-
KGS
16h 40m
1 stop
Lufthansa Logo
12:40 pm - 11:59 pm
KGS
-
BOS
18h 19m
2 stops
$1,118Lufthansa
Fri, Jul 31 - Mon, Aug 31
Multiple Airlines Logo
10:50 am - 12:35 am
BOS
-
KGS
30h 45m
3 stops
Multiple Airlines Logo
12:50 am - 6:50 pm
KGS
-
BOS
25h 00m
2 stops
$1,141Multiple Airlines
Tue, Aug 11 - Wed, Aug 19
Multiple Airlines Logo
8:50 pm - 10:45 pm
BOS
-
KGS
18h 55m
2 stops
Multiple Airlines Logo
12:10 pm - 9:45 pm
KGS
-
BOS
16h 35m
2 stops
$1,145Multiple Airlines
Tue, Aug 11 - Thu, Aug 20
Multiple Airlines Logo
10:00 pm - 7:45 pm
BOS
-
KGS
14h 45m
2 stops
Multiple Airlines Logo
12:40 pm - 9:27 pm
KGS
-
BOS
15h 47m
2 stops
$1,171Multiple Airlines
Fri, Jul 31 - Mon, Aug 31
Multiple Airlines Logo
10:40 am - 7:10 pm
BOS
-
KGS
25h 30m
3 stops
Multiple Airlines Logo
6:10 pm - 8:20 pm
KGS
-
BOS
33h 10m
3 stops
$1,187Multiple Airlines
Fri, Jul 31 - Mon, Aug 31
Multiple Airlines Logo
10:05 am - 7:10 pm
BOS
-
KGS
26h 05m
2 stops
Multiple Airlines Logo
6:10 pm - 8:20 pm
KGS
-
BOS
33h 10m
3 stops
$1,195Multiple Airlines
Fri, Jul 31 - Mon, Aug 31

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Emirates flights from Massachusetts to Kos

Our best Emirates deals on Massachusetts to Kos flight tickets
Emirates
Oct 4
BOS11:05 pmBoston Logan Intl
35h 30m
2 stops
KGS5:35 pmKos
Oct 8
KGS6:05 pmKos
51h 05m
2 stops
BOS2:10 pmBoston Logan Intl
$1,775
Emirates
Sep 20
BOS11:05 pmBoston Logan Intl
35h 25m
2 stops
KGS5:30 pmKos
Sep 24
KGS6:10 pmKos
27h 00m
2 stops
BOS2:10 pmBoston Logan Intl
$1,821
Emirates
Jul 13
BOS11:05 pmBoston Logan Intl
59h 25m
2 stops
KGS5:30 pmKos
Jul 27
KGS12:35 pmKos
32h 35m
2 stops
BOS2:10 pmBoston Logan Intl
$1,962

Austrian Airlines flights from Massachusetts to Kos

Our best Austrian Airlines deals on Massachusetts to Kos flight tickets
Austrian Airlines
Jun 30
BOS5:10 pmBoston Logan Intl
20h 40m
1 stop
KGS8:50 pmKos
Aug 31
KGS8:50 pmKos
29h 29m
2 stops
BOS7:19 pmBoston Logan Intl
$2,169
Austrian Airlines
Jun 30
BOS5:10 pmBoston Logan Intl
20h 40m
1 stop
KGS8:50 pmKos
Aug 31
KGS8:50 pmKos
29h 29m
2 stops
BOS7:19 pmBoston Logan Intl
$2,170
Austrian Airlines
Jun 30
BOS2:30 pmBoston Logan Intl
23h 20m
2 stops
KGS8:50 pmKos
Aug 31
KGS8:50 pmKos
29h 29m
2 stops
BOS7:19 pmBoston Logan Intl
$2,174

momondo 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, momondo users made 832,500 searches. Data last updated June 17, 2026.
Use the filters below to find and compare flights from Massachusetts to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 8/11

9:40 pm-7:55 pm

1 stop15h 15m

Kos

Thu 8/20

11:00 am-7:55 pm

1 stop15h 55m

$949

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 8/11

7:23 pm-7:05 pm

2 stops16h 42m

Kos

Thu 8/20

11:00 am-7:55 pm

1 stop15h 55m

$1,009

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Fri 7/31

8:05 pm-7:45 pm

1 stop16h 40m

Kos

Mon 8/31

11:00 am-3:10 pm

1 stop35h 10m

$1,075

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 8/11

4:45 pm-10:10 am

3 stops34h 25m

Kos

Thu 8/20

11:00 am-2:45 pm

3 stops34h 45m

$1,083

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Fri 7/31

8:05 pm-7:45 pm

1 stop16h 40m

Kos

Mon 8/31

12:40 pm-11:59 pm

2 stops18h 19m

$1,118

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 8/11

10:50 am-12:35 am

3 stops30h 45m

Kos

Wed 8/19

12:50 am-6:50 pm

2 stops25h 00m

$1,141

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 8/11

8:50 pm-10:45 pm

2 stops18h 55m

Kos

Thu 8/20

12:10 pm-9:45 pm

2 stops16h 35m

$1,145
Quickest round-trip

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Fri 7/31

10:00 pm-7:45 pm

2 stops14h 45m

Kos

Mon 8/31

12:40 pm-9:27 pm

2 stops15h 47m

$1,171

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Fri 7/31

10:40 am-7:10 pm

3 stops25h 30m

Kos

Mon 8/31

6:10 pm-8:20 pm

3 stops33h 10m

$1,187

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Fri 7/31

10:05 am-7:10 pm

2 stops26h 05m

Kos

Mon 8/31

6:10 pm-8:20 pm

3 stops33h 10m

$1,195

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Cheap Massachusetts to Kos flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Massachusetts to Kos

Fastest flight time

15h 15m

Direct flights

None
The fastest flight from Massachusetts to Kos takes 15h 15m
There are no direct flights from Massachusetts to Kos. There are no popular flight routes from Massachusetts to Kos.
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Frequently asked questions about flying from Massachusetts to Kos

  • When did momondo last update prices for flights from Massachusetts to Kos Airport?

    Prices for flights from Massachusetts to Kos Airport refresh daily.

  • How many operators does momondo search for flights from Massachusetts to Kos Airport?

  • How old do you have to be to fly from Massachusetts to Kos Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Massachusetts to Kos Airport.

  • What documentation or ID do you need to fly to Kos Airport?

    The travel and health documents required for your trip to Kos Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Kos Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Massachusetts to Kos

Compare and see reviews for airlines that fly from Massachusetts to Kos with momondo
Airline
Rating
Free Cancellation
Price
SWISSPriceFrom $954Free CancellationRating
7.5
1,971 reviews
Search SWISS flights

Frequently asked questions about flying from Massachusetts to Kos

  • How do I get Price Alerts for flights from Massachusetts to Kos?

    Price Alerts will notify you by email when the price for flights to Kos from Massachusetts decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Massachusetts to Kos with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near Kos?

Book flights to Kos if you plan to visit one of these locations
Kardamena
Marmari

Why use momondo?

Why should I use momondo to find a flight deal from Massachusetts to Kos?

It is quick and easy to find Massachusetts to Kos flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Kos that suits you.

Can I find flights from Massachusetts to Kos with flexible booking policies on momondo?

Yes. All flights to Kos from Massachusetts on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Massachusetts to Kos?

momondo provides multiple filters to help you find the best flight to Kos from Massachusetts. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Massachusetts to Kos right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Massachusetts to Kos now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Kos and let you know when they change.

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