Cheap flights from Boston (BOS) to Kos (KGS) from $1,042

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 7/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
BOS — KGS
Apr 30 — May 71

What is the cheapest day to fly round-trip from Boston to Kos?

Users have found that leaving on a Friday can be a cost-effective option. It’s possible to save up to 26% on your flight compared to booking on days when demand is much higher.

When is the cheapest time to fly from Boston to Kos (BOS - KGS)?

When flying from Boston to Kos, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 12% versus a flight in the morning.

Cheap SWISS flights from Boston to Kos

Explore cheap flight options specifically provided by SWISS for the route between Boston and Kos. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Thu 7/45:10 pmBOS - KGS
1 stop15h 00mSWISS
Tue 7/98:40 pmKGS - BOS
1 stop25h 40mSWISS
Deal found 4/24$2,206
Thu 7/49:45 pmBOS - KGS
2 stops30h 10mSWISS
Tue 7/98:40 pmKGS - BOS
1 stop25h 40mSWISS
Deal found 4/24$2,241

Boston to Kos 2024 flight deals

Discover exclusive flight deals for travel between Boston and Kos in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Thu 7/44:10 pmBOS - KGS
1 stop16h 35mCondor
Tue 7/97:25 pmKGS - BOS
1 stop25h 00mCondor
Deal found 4/25$1,042
Wed 7/37:15 pmBOS - KGS
2 stops15h 00mMultiple Airlines
Tue 7/97:25 pmKGS - BOS
1 stop25h 00mMultiple Airlines
Deal found 4/23$1,197
Mon 9/29:45 pmBOS - KGS
1 stop15h 10mSWISS
Tue 10/18:40 pmKGS - BOS
1 stop30h 25mSWISS
Deal found 4/25$1,352
Tue 9/35:10 pmBOS - KGS
1 stop34h 00mSWISS
Fri 10/43:55 pmKGS - BOS
1 stop35h 10mSWISS
Deal found 4/25$1,376
Sat 8/314:10 pmBOS - KGS
1 stop20h 25mCondor
Fri 9/64:35 pmKGS - BOS
1 stop27h 45mCondor
Deal found 4/24$1,450
Tue 9/33:30 pmBOS - KGS
2 stops14h 10mMultiple Airlines
Fri 10/43:55 pmKGS - BOS
1 stop35h 10mMultiple Airlines
Deal found 4/25$1,457
Sat 8/3111:44 amBOS - KGS
2 stops24h 51mMultiple Airlines
Fri 9/64:35 pmKGS - BOS
1 stop27h 45mMultiple Airlines
Deal found 4/24$1,480
Sat 8/109:45 pmBOS - KGS
1 stop29h 15mSWISS
Sat 8/178:50 pmKGS - BOS
1 stop25h 30mSWISS
Deal found 4/24$1,484
Tue 9/36:00 amBOS - KGS
2 stops23h 40mMultiple Airlines
Fri 10/45:20 pmKGS - BOS
2 stops29h 40mMultiple Airlines
Deal found 4/25$1,511

Find flights from Boston to Kos within your budget

Customize your flight search to find flights from Boston 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 3,068,701 searches. Data last updated April 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,042 - $3,443

Route

Depart

Return

Price

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 7/4

1 stop16h 35m

Kos

Tue 7/9

1 stop25h 00m

$1,042

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Wed 7/3

2 stops15h 00m

Kos

Tue 7/9

1 stop25h 00m

$1,197

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Wed 7/3

2 stops27h 02m

Kos

Tue 7/9

2 stops39h 25m

$1,825

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Wed 7/3

3 stops27h 08m

Kos

Tue 7/9

3 stops52h 00m

$1,826

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Wed 7/3

1 stop16h 15m

Kos

Tue 7/9

1 stop30h 25m

$1,828

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 7/4

2 stops40h 30m

Kos

Tue 7/9

2 stops59h 45m

$1,970

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 7/4

1 stop15h 00m

Kos

Tue 7/9

1 stop25h 40m

$2,206

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 7/4

2 stops30h 10m

Kos

Tue 7/9

1 stop25h 40m

$2,241

Boston Logan IntlKos

BOS - KGS

BOSKGS

Boston Logan Intl

Thu 7/4

2 stops37h 05m

Kos

Tue 7/9

3 stops52h 00m

$3,443

Flights are sorted by cheapest first

Deals found on 4/25

When is the cheapest time to fly from Boston to Kos?

Use this chart to determine the cheapest time to fly round-trip from Boston to Kos. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Boston to Kos flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Reviews of airlines servicing Kos

Get insights into the airlines that provide service to Kos. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kos. Reviews last updated April 25, 2024.
7.8
Good
2,064 reviews

Boarding

7.9

Crew

8.4

Comfort

7.6

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 10

Flight was delayed 2 hours due to technical issues they were having at Zurich airport according to the swiss agent when I called. This caused my connection flight to be unviable. The swiss agent was helpful in finding me a partner airline to fulfill my need to get to final destination in eastern Europe. However, the only flight the agent was originally able to find me was a connecting flight through Frankfurt with a 7 hour layover and not only that but they didnt have space on the flight without upgrading me to a higher cabin class at my expense of 384 euro. I asked if this could be waived since the technical issues were not my fault from the beginning and the agent stated they arent. I ended up paying the extra 384 euro for the agent to call me back an hour later stating he found another flight through Munich with only an hour and a half layover which was great, but when I asked for the 384 euros to be refunded he stated that was included in the price difference for this flight and there was nothing he could do about that. I feel like I got scammed out of that 384 euros as that was a cabin upgrade for a flight I never ended up taking that was supposed to be my replacement for an error they were having on their end. I am grateful for the agent finding me replacement flights that worked in my favor time wise but not in being swindled out of extra charges. I also paid 85 USD to "pick my seats" (which honestly feels like a cash grab on behalf of airlines these days anyways) on my original swiss flight that I did not receive back either since I could not pick my seats on the replacement flights as well. Way to use flight delays for swindling your customers Swiss. Kayak was great as usual but I did not have any communications with Kayak directly for this ordeal it was all through Swiss airlines.

7.8
Good
2,064 reviews
7.8
Good
2,064 reviews

Boarding

7.9

Crew

8.4

Comfort

7.6

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 10

Flight was delayed 2 hours due to technical issues they were having at Zurich airport according to the swiss agent when I called. This caused my connection flight to be unviable. The swiss agent was helpful in finding me a partner airline to fulfill my need to get to final destination in eastern Europe. However, the only flight the agent was originally able to find me was a connecting flight through Frankfurt with a 7 hour layover and not only that but they didnt have space on the flight without upgrading me to a higher cabin class at my expense of 384 euro. I asked if this could be waived since the technical issues were not my fault from the beginning and the agent stated they arent. I ended up paying the extra 384 euro for the agent to call me back an hour later stating he found another flight through Munich with only an hour and a half layover which was great, but when I asked for the 384 euros to be refunded he stated that was included in the price difference for this flight and there was nothing he could do about that. I feel like I got scammed out of that 384 euros as that was a cabin upgrade for a flight I never ended up taking that was supposed to be my replacement for an error they were having on their end. I am grateful for the agent finding me replacement flights that worked in my favor time wise but not in being swindled out of extra charges. I also paid 85 USD to "pick my seats" (which honestly feels like a cash grab on behalf of airlines these days anyways) on my original swiss flight that I did not receive back either since I could not pick my seats on the replacement flights as well. Way to use flight delays for swindling your customers Swiss. Kayak was great as usual but I did not have any communications with Kayak directly for this ordeal it was all through Swiss airlines.

7.3
Good
605 reviews
7.8
Good
2,064 reviews

Boarding

7.9

Crew

8.4

Comfort

7.6

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 10

Flight was delayed 2 hours due to technical issues they were having at Zurich airport according to the swiss agent when I called. This caused my connection flight to be unviable. The swiss agent was helpful in finding me a partner airline to fulfill my need to get to final destination in eastern Europe. However, the only flight the agent was originally able to find me was a connecting flight through Frankfurt with a 7 hour layover and not only that but they didnt have space on the flight without upgrading me to a higher cabin class at my expense of 384 euro. I asked if this could be waived since the technical issues were not my fault from the beginning and the agent stated they arent. I ended up paying the extra 384 euro for the agent to call me back an hour later stating he found another flight through Munich with only an hour and a half layover which was great, but when I asked for the 384 euros to be refunded he stated that was included in the price difference for this flight and there was nothing he could do about that. I feel like I got scammed out of that 384 euros as that was a cabin upgrade for a flight I never ended up taking that was supposed to be my replacement for an error they were having on their end. I am grateful for the agent finding me replacement flights that worked in my favor time wise but not in being swindled out of extra charges. I also paid 85 USD to "pick my seats" (which honestly feels like a cash grab on behalf of airlines these days anyways) on my original swiss flight that I did not receive back either since I could not pick my seats on the replacement flights as well. Way to use flight delays for swindling your customers Swiss. Kayak was great as usual but I did not have any communications with Kayak directly for this ordeal it was all through Swiss airlines.

6.5
Okay
363 reviews
7.8
Good
2,064 reviews

Boarding

7.9

Crew

8.4

Comfort

7.6

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 10

Flight was delayed 2 hours due to technical issues they were having at Zurich airport according to the swiss agent when I called. This caused my connection flight to be unviable. The swiss agent was helpful in finding me a partner airline to fulfill my need to get to final destination in eastern Europe. However, the only flight the agent was originally able to find me was a connecting flight through Frankfurt with a 7 hour layover and not only that but they didnt have space on the flight without upgrading me to a higher cabin class at my expense of 384 euro. I asked if this could be waived since the technical issues were not my fault from the beginning and the agent stated they arent. I ended up paying the extra 384 euro for the agent to call me back an hour later stating he found another flight through Munich with only an hour and a half layover which was great, but when I asked for the 384 euros to be refunded he stated that was included in the price difference for this flight and there was nothing he could do about that. I feel like I got scammed out of that 384 euros as that was a cabin upgrade for a flight I never ended up taking that was supposed to be my replacement for an error they were having on their end. I am grateful for the agent finding me replacement flights that worked in my favor time wise but not in being swindled out of extra charges. I also paid 85 USD to "pick my seats" (which honestly feels like a cash grab on behalf of airlines these days anyways) on my original swiss flight that I did not receive back either since I could not pick my seats on the replacement flights as well. Way to use flight delays for swindling your customers Swiss. Kayak was great as usual but I did not have any communications with Kayak directly for this ordeal it was all through Swiss airlines.

Related info for your journey

Find useful and relevant information for your journey from Boston to Kos. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • Can I find flights from Boston to Kos for under $1,100 on Cheapflights?

    Yes, there are multiple flights from Boston to Kos for under $1,100. The cheapest flight booked recently is on Condor for just $1,042, but on average you can expect to pay $1,953.

  • What does BOS to KGS mean?

    This is defined as Boston Logan Intl Airport (BOS) and Kos Airport (KGS). Codes like Kos Airport are often used to just call airports uniquely.

  • Can I find deals for flights from Boston to Kos that include extra baggage allowance?

    The amount of baggage you can bring on your Boston to Kos flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Boston to Kos with specific airlines?

    Yes, Cheapflights allows you to browse and filter Boston to Kos flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston 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.

  • Can I find deals for flights from Boston to Kos that allow pets onboard?

    Many airlines flying from Boston to Kos offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Boston to Kos?

    Yes, you can often find last-minute deals on Boston to Kos flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Boston to Kos flight deals updated?

    The Boston to Kos flight deals you see on this page were last updated on 4/25.

See more FAQs

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Alternative routes for Boston to Kos
See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Boston to Kos

Discover the top 2 airlines that operate flights from Boston 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 3,068,701 searches. Data last updated April 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$1,035Average$1,184FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest$1,122Average$1,362FlexibilityNo cancel feeOn-time79%
Search SWISS flights

Search flights from Boston to Kos by cabin class

Find flights from Boston to Kos, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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How does Cheapflights help users find flights from Boston to Kos?

Cheapflights makes it easy to find Boston to Kos flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Boston to Kos?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Boston to Kos.

Can Cheapflights find flights from Boston to Kos with no change fees?

Yes, we can. To see specific flights from Boston to Kos with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Boston to Kos become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Kos from Boston today and book when prices fit your budget.

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