When did momondo last update prices for flights from Boston Logan Intl Airport to Kos Airport?

Prices for flights from Boston Logan Intl Airport to Kos Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Boston Logan Intl Airport to Kos Airport?

As of February 2026, there are 2 operators available to choose from for flights from Boston Logan Intl Airport to Kos Airport.

How old do you have to be to fly from Boston Logan Intl Airport to Kos Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl Airport to Kos Airport.

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

The necessary travel and health documents for your Kos Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$352 Cheap Flights from Boston to Kos in 2026

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Find the cheapest flights from Boston to Kos

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:40 pm - 8:35 pm

BOS

KGS

16h 55m

2 stops

8:35 am - 9:20 pm

KGS

BOS

18h 45m

2 stops

$933Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

10:20 pm - 4:10 pm

BOS

KGS

35h 50m

3 stops

4:40 pm - 2:55 pm

KGS

BOS

28h 15m

3 stops

$968Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

9:40 pm - 9:00 am

BOS

KGS

29h 20m

3 stops

8:35 am - 9:20 pm

KGS

BOS

18h 45m

2 stops

$1,224Multiple Airlines

Thu, Mar 19 - Thu, Mar 26

8:05 pm - 7:05 pm

BOS

KGS

16h 00m

1 stop

8:45 pm - 7:55 pm

KGS

BOS

30h 10m

1 stop

$1,275Multiple Airlines

Tue, Jun 16 - Sat, Jun 27

11:00 am - 8:50 pm

BOS

KGS

26h 50m

2 stops

8:45 pm - 7:55 pm

KGS

BOS

30h 10m

1 stop

$1,278Multiple Airlines

Tue, Jun 16 - Sat, Jun 27

11:00 am - 8:50 pm

BOS

KGS

26h 50m

2 stops

9:40 am - 5:40 pm

KGS

BOS

15h 00m

2 stops

$1,311Multiple Airlines

Tue, Jun 16 - Sat, Jun 27

11:05 pm - 12:35 am

BOS

KGS

42h 30m

2 stops

1:05 pm - 2:10 pm

KGS

BOS

32h 05m

2 stops

$1,775Emirates

Wed, May 6 - Sun, May 10

Emirates flights from Boston to Kos

Our best Emirates deals on Boston to Kos flight tickets

Emirates

May 6

BOS11:05 pmBoston Logan Intl

42h 30m

2 stops

KGS12:35 amKos

May 10

KGS1:05 pmKos

32h 05m

2 stops

BOS2:10 pmBoston Logan Intl

$1,775

Emirates

Feb 4

BOS10:10 pmBoston Logan Intl

35h 55m

2 stops

KGS5:05 pmKos

Feb 8

KGS2:20 pmKos

30h 35m

2 stops

BOS1:55 pmBoston Logan Intl

$1,909

Fly from

Fly to

Route

Depart

Return

Price

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 3/19

9:40 pm-8:35 pm

2 stops16h 55m

Kos

Thu 3/26

8:35 am-9:20 pm

2 stops18h 45m

$933

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 3/19

10:20 pm-4:10 pm

3 stops35h 50m

Kos

Thu 3/26

4:40 pm-2:55 pm

3 stops28h 15m

$968

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 3/19

9:40 pm-9:00 am

3 stops29h 20m

Kos

Thu 3/26

8:35 am-9:20 pm

2 stops18h 45m

$1,224

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 6/16

8:05 pm-7:05 pm

1 stop16h 00m

Kos

Sat 6/27

8:45 pm-7:55 pm

1 stop30h 10m

$1,275

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 6/16

11:00 am-8:50 pm

2 stops26h 50m

Kos

Sat 6/27

8:45 pm-7:55 pm

1 stop30h 10m

$1,278

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Tue 6/16

11:00 am-8:50 pm

2 stops26h 50m

Kos

Sat 6/27

9:40 am-5:40 pm

2 stops15h 00m

$1,311

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Wed 5/6

11:05 pm-12:35 am

2 stops42h 30m

Kos

Sun 5/10

1:05 pm-2:10 pm

2 stops32h 05m

$1,775

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Mon 7/6

8:05 pm-11:00 pm

3 stops43h 55m

$352

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Sun 7/5

8:50 pm-10:35 pm

3 stops18h 45m

$374

BostonKos

BOS - KGS

BOSKGS

Boston Logan Intl

Sun 7/5

8:05 pm-6:15 pm

2 stops15h 10m

$384

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Boston to Kos

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Which airport is the most popular layover for flights between Boston and Kos?

Frankfurt am Main (FRA) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Boston to Kos?

Flights via Zurich (ZRH) offer the lowest average round-trip price of $1,044.

Which layover airport has the shortest travel time from Boston to Kos?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 45m.

Which layover airport has the shortest connection time from Boston to Kos?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 2h 08m.

When to book flights from Boston to Kos

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Kos according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Boston to Kos (BOS to KGS) flight deals and tips

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

Fastest flight time	16h 00m
Direct flights	None

The fastest flight from Boston to Kos takes 16h 00m

There are no direct flights from Boston to Kos. There are no popular flight routes from Boston to Kos.

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How far is Boston Logan Intl to Kos by plane?
The distance between Boston Logan Intl and Kos is about 4930.9 mi. By plane, this route typically takes 16h 00m.
When did momondo last update prices for flights from Boston Logan Intl Airport to Kos Airport?
Prices for flights from Boston Logan Intl Airport to Kos Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Boston Logan Intl Airport to Kos Airport?
As of February 2026, there are 2 operators available to choose from for flights from Boston Logan Intl Airport to Kos Airport.
How old do you have to be to fly from Boston Logan Intl Airport to Kos Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl Airport to Kos Airport.
What documentation or ID do you need to fly to Kos Airport?
The necessary travel and health documents for your Kos Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Boston to Kos?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Boston to Kos is Lufthansa (54% of total bookings). The next most popular airline is SWISS (46%).

Best airlines flying from Boston to Kos

Compare and see reviews for airlines that fly from Boston to Kos with momondo

Airline	Rating	Free Cancellation	Price
SWISS	PriceFrom $954	Free Cancellation	Rating 7.6 1,864 reviews		Search SWISS flights
Lufthansa	PriceFrom $999	Free Cancellation	Rating 6.8 7,758 reviews		Search Lufthansa flights

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Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Kos from Boston.

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

Yes. momondo enables you to select and highlight flights to Kos from Boston with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Boston to Kos.

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

If you are not ready to book a flight from Boston 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.