BOS - KGS

$1,056 Find Cheap Flights from Boston to Kos - Compare and Save

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Everything you should know

Cheapest round-trip
$1,056
Typical prices: $1,045-$1,206
Multiple Airlines
Wed 11/14Thu 1/11
BOS - KGS • 3 stops
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.
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Cheap Flights from Boston to Kos (BOS-KGS)

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

Recent round-trip flight deals from Boston to Kos

Sat, Nov 14 - Mon, Jan 11
Multiple Airlines Logo
10:10 pm - 7:45 amBOS  Boston Logan Intl-KGS Kos
26h 35m3 stops Lisbon Humberto Delgado Madrid Barajas Athens Eleftherios V.
Multiple Airlines Logo
8:25 am - 2:45 pmKGS  Kos-BOS Boston Logan Intl
37h 20m3 stops Athens Eleftherios V. Rome Fiumicino Lisbon Humberto Delgado
$1,056Multiple Airlines
Sat, Nov 14 - Mon, Jan 11
Multiple Airlines Logo
10:10 pm - 7:45 amBOS  Boston Logan Intl-KGS Kos
26h 35m2 stops Lisbon Humberto Delgado Athens Eleftherios V.
Multiple Airlines Logo
2:05 pm - 2:45 pmKGS  Kos-BOS Boston Logan Intl
31h 40m3 stops Athens Eleftherios V. Rome Fiumicino Lisbon Humberto Delgado
$1,081Multiple Airlines
Sat, Nov 14 - Mon, Jan 11
Multiple Airlines Logo
10:10 pm - 7:45 amBOS  Boston Logan Intl-KGS Kos
26h 35m2 stops Lisbon Humberto Delgado Athens Eleftherios V.
Multiple Airlines Logo
9:45 pm - 6:05 pmKGS  Kos-BOS Boston Logan Intl
27h 20m2 stops Athens Eleftherios V. Istanbul
$1,167Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
6:50 pm - 7:45 amBOS  Boston Logan Intl-KGS Kos
29h 55m3 stops Shannon London Heathrow Athens Eleftherios V.
Multiple Airlines Logo
12:00 pm - 2:40 pmKGS  Kos-BOS Boston Logan Intl
33h 40m3 stops Athens Eleftherios V. Milan Malpensa Lisbon Humberto Delgado
$1,216Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
4:05 pm - 4:30 pmBOS  Boston Logan Intl-KGS Kos
17h 25m2 stops Frankfurt am Main Athens Eleftherios V.
Multiple Airlines Logo
9:45 pm - 1:30 pmKGS  Kos-BOS Boston Logan Intl
22h 45m2 stops Athens Eleftherios V. Vienna Intl
$1,311Multiple Airlines
Thu, Dec 10 - Thu, Dec 17
Multiple Airlines Logo
6:50 pm - 7:45 amBOS  Boston Logan Intl-KGS Kos
29h 55m3 stops Shannon London Heathrow Athens Eleftherios V.
Multiple Airlines Logo
9:45 pm - 8:15 pmKGS  Kos-BOS Boston Logan Intl
29h 30m2 stops Athens Eleftherios V. Lisbon Humberto Delgado
$1,357Multiple Airlines
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 with more confidence.

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 $1,121. 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 10h 17m over the past 3 months.

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Key details for Boston to Kos flights

Cheapest flight

$1,056
Round-trip flight from Boston to Kos

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

Your Boston to Kos flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • How long is a flight from Boston to Kos?

    A nonstop flight from Boston to Kos takes 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.

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

    Round-trip flights from Boston to Kos range from $1,045 to $1,206, with an average of $1,108 over the past 12 months. Anything below $1,045 counts as a good deal.

  • 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 $1,056 to $1,357. That means the highest observed fare was about 28% higher than the lowest one.

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

    Kos Airport (KGS) hosts 5 major car rental companies, with daily rates averaging $34 for economy cars. Top options include:

    • ABBYCAR
    • Exer Rent a Car
    • Caldera
    • Europcar
    • Alma Car Hire

  • 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).

  • 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.

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

    Yes. Flexible dates can save you up to 37% on flights from Boston to Kos. Tuesday is the cheapest departure day at $1,045 round-trip on average, while Sunday is the most expensive at $1,650, a difference of $605.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What is the time difference between Boston and Kos?

    Kos is 6 hours ahead of Boston (Eastern European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking Boston to Kos flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Sunday. On this route, Tuesday flights average $1,045, about $605 less than Sunday fares (37% savings) based on the last 12 months.

More options for your flight from Boston to Kos

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

Car rentals in Kos
Hotels in Kos