Which airports can I use when flying from Boston to Kos?

Flights from Boston to Kos usually depart from Boston Logan Intl (BOS) and arrive at Kos (KGS).

What cabin classes can I book on flights from Boston to Kos?

Two cabin classes are available on flights from Boston to Kos: • Economy Class • Business Class

Which airports do connecting flights from Boston to Kos pass through?

Most connecting flights from Boston to Kos pass through Zurich (ZRH), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Can I save money by using flexible dates for flights from Boston to Kos?

Yes. Being flexible with your travel dates can save you up to 40% on the Boston to Kos route. Friday is the cheapest departure day at $1,003 round-trip on average, while Sunday is the most expensive at $1,650, a difference of $647. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

How long is a flight from Boston to Kos?

A nonstop flight from Boston to Kos takes 0h 00m, covering 4,924 miles.

Do I need a passport to fly from Boston to Kos?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Boston to Kos changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about $939 to $1,865. That means the highest observed fare was about 98% higher than the lowest one.

What is the time difference between Boston and Kos?

Kos is 7 hours ahead of Boston (Eastern European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Kos Airport (KGS)?

Kos Airport (KGS) hosts 5 major car rental companies, with daily rates starting from around $9 for economy cars. Top options include: • ABBYCAR • Exer Rent a Car • Caldera • Europcar • Alma Car Hire

How much should I expect to pay for a Boston to Kos flight?

Round-trip flights from Boston to Kos range from $1,008 to $1,206, with an average of $1,069 over the past 12 months. Anything below $1,008 counts as a good deal.

What is the cheapest layover airport when flying from Boston to Kos?

Flights via Zurich (ZRH) offer the most affordable fares, with an average round-trip price of $1,113. Based on KAYAK data over the past 3 months.

When flying from Boston to Kos which airport offers the shortest layover?

Zurich (ZRH) had the shortest average connection time for Boston to Kos layovers at 680 minutes over the past 3 months.

Cheap Flights from Boston to Kos | KAYAK

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Cheapest round-trip

$939

Typical prices: $1,008-$1,206

Lufthansa, SWISS

Thu 10/25Thu 11/1

BOS - KGS • 1 stop

Nonstop flights

Not available

There are currently no direct flights between Boston and Kos. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

October

Cheapest • 9% price drop

August

Most popular

Good to know

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We hope you love your trip to Kos!

Flight Deals

Cheap Flights from Boston to Kos (BOS-KGS)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Boston to Kos

Sun, Oct 25 - Sun, Nov 1

5:05 pm - 10:25 amBOS Boston Logan Intl-KGS Kos

11h 20m1 stop Frankfurt am Main

10:40 am - 8:20 pmKGS Kos-BOS Boston Logan Intl

16h 40m1 stop Zurich

$939Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

5:05 pm - 10:25 amBOS Boston Logan Intl-KGS Kos

11h 20m1 stop Frankfurt am Main

10:40 am - 10:51 amKGS Kos-BOS Boston Logan Intl

31h 11m2 stops Zurich Newark

$947Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

7:00 pm - 7:45 amBOS Boston Logan Intl-KGS Kos

30h 45m3 stops Lisbon Humberto Delgado Milan Malpensa Athens Eleftherios V.

4:15 pm - 7:55 pmKGS Kos-BOS Boston Logan Intl

34h 40m3 stops Athens Eleftherios V. Milan Malpensa Lisbon Humberto Delgado

$973Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

8:50 pm - 7:05 pmBOS Boston Logan Intl-KGS Kos

16h 15m2 stops Reykjavik Keflavik Intl Frankfurt am Main

8:40 pm - 7:55 pmKGS Kos-BOS Boston Logan Intl

30h 15m3 stops Athens Eleftherios V. Barcelona-El Prat Lisbon Humberto Delgado

$991Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

8:50 pm - 7:05 pmBOS Boston Logan Intl-KGS Kos

16h 15m2 stops Reykjavik Keflavik Intl Frankfurt am Main

9:45 pm - 7:55 pmKGS Kos-BOS Boston Logan Intl

29h 10m2 stops Athens Eleftherios V. Lisbon Humberto Delgado

$1,045Multiple Airlines

Fri, Feb 12 - Sun, Feb 21

6:55 pm - 8:05 pmBOS Boston Logan Intl-KGS Kos

18h 10m2 stops Vienna Intl Athens Eleftherios V.

8:35 pm - 6:35 pmKGS Kos-BOS Boston Logan Intl

29h 00m2 stops Athens Eleftherios V. Munich Franz Josef Strauss

$1,232Multiple Airlines

Sun, Oct 18 - Wed, Oct 21

11:05 pm - 5:35 pmBOS Boston Logan Intl-KGS Kos

35h 30m2 stops Dubai Intl Athens Eleftherios V.

6:05 pm - 2:20 pmKGS Kos-BOS Boston Logan Intl

51h 15m2 stops Athens Eleftherios V. Dubai Intl

$1,865Emirates

Booking Insights

Price, demand and travel trends for Boston to Kos flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Boston to Kos with more confidence.

Airlines

Layovers

What is the cheapest airline to fly from Boston to Kos?

Emirates ($1,865) offered the cheapest round-trip ticket from Boston to Kos in the last 5 days.

Find deals

Low season	January
High season	August

Most popular time to fly with an average 4% increase in price.

When to book flights from Boston to Kos

Are your dates flexible? Find out the best times to travel from Boston to Kos based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Boston to Kos?
Flights from Boston to Kos usually depart from Boston Logan Intl (BOS) and arrive at Kos (KGS).
What cabin classes can I book on flights from Boston to Kos?
Two cabin classes are available on flights from Boston to Kos:

• Economy Class
• Business Class
Which airports do connecting flights from Boston to Kos pass through?
Most connecting flights from Boston to Kos pass through Zurich (ZRH), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.
Can I save money by using flexible dates for flights from Boston to Kos?
Yes. Being flexible with your travel dates can save you up to 40% on the Boston to Kos route. Friday is the cheapest departure day at $1,003 round-trip on average, while Sunday is the most expensive at $1,650, a difference of $647. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
How long is a flight from Boston to Kos?
A nonstop flight from Boston to Kos takes 0h 00m, covering 4,924 miles.
Do I need a passport to fly from Boston to Kos?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Boston to Kos changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about $939 to $1,865. That means the highest observed fare was about 98% higher than the lowest one.
What is the time difference between Boston and Kos?
Kos is 7 hours ahead of Boston (Eastern European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Kos Airport (KGS)?
Kos Airport (KGS) hosts 5 major car rental companies, with daily rates starting from around $9 for economy cars. Top options include:
• ABBYCAR
• Exer Rent a Car
• Caldera
• Europcar
• Alma Car Hire
How much should I expect to pay for a Boston to Kos flight?
Round-trip flights from Boston to Kos range from $1,008 to $1,206, with an average of $1,069 over the past 12 months. Anything below $1,008 counts as a good deal.

If your dates can be flexible, aim for a Friday departure instead of Sunday. On this route, Friday flights average $1,003 - about $647 less than Sunday (39% savings) based on the last 12 months.
If you can choose when to travel, plan your Boston to Kos trip for October. Fares historically average $970 round-trip in that month - typically $680 less than the most expensive month, which is May (based on the last 12 months).

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BOS - KGS

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Everything you should know

Cheap Flights from Boston to Kos (BOS-KGS)

Recent round-trip flight deals from Boston to Kos

Recent one-way flight deals from Boston to Kos

Price, demand and travel trends for Boston to Kos flights

What is the cheapest airline to fly from Boston to Kos?

What is the cheapest layover airport when flying from Boston to Kos?

When flying from Boston to Kos which airport offers the shortest layover?

Key details for Boston to Kos flights

Low season

High season

When to book flights from Boston to Kos

Your Boston to Kos flight questions, answered

Your guide to booking Boston to Kos flights

More options for your flight from Boston to Kos

Complete your trip to Kos with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Boston to Kos

Find direct flights to and from Boston and Kos

Flights from domestic origins to Kos

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