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BOS - KGS

$1,107 Find cheap flights from Boston to Kos

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Kos 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.
1 adult
0 bags
Fri 6/14
Fri 6/21

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Kos, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Kos, as well as popular online travel agencies
In the last 7 days travelers have searched 42,393,389 times on KAYAK, and here is why:

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Cheap flight deals from Boston to Kos (BOS-KGS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Kos that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
4:10 pm - 3:45 pmBOS-KGS
16h 35m1 stop
7:25 pm - 1:25 pmKGS-BOS
25h 00m1 stop
$1,107Condor
Find Deal
Thu, Jul 4 - Tue, Jul 9
9:45 pm - 7:55 pmBOS-KGS
15h 10m1 stop
8:50 pm - 8:05 pmKGS-BOS
30h 15m1 stop
$1,189SWISS
Find Deal
Mon, Sep 2 - Sat, Oct 5
10:00 pm - 5:20 pmBOS-KGS
12h 20m1 stop
8:15 pm - 5:50 pmKGS-BOS
28h 35m1 stop
$1,231Lufthansa
Find Deal
Wed, Sep 4 - Sat, Sep 14
2:25 pm - 5:20 pmBOS-KGS
19h 55m2 stops
9:35 am - 5:50 pmKGS-BOS
15h 15m2 stops
$1,262Lufthansa
Find Deal
Wed, Sep 4 - Sat, Sep 14
8:05 pm - 12:40 pmBOS-KGS
33h 35m2 stops
9:35 am - 4:00 pmKGS-BOS
13h 25m1 stop
$1,275Lufthansa
Find Deal
Mon, Sep 2 - Sat, Oct 5
8:05 pm - 12:40 pmBOS-KGS
33h 35m2 stops
9:35 am - 7:12 pmKGS-BOS
16h 37m2 stops
$1,285Lufthansa
Find Deal
Mon, Sep 2 - Sat, Oct 5
5:10 pm - 2:25 pmBOS-KGS
14h 15m1 stop
8:50 pm - 3:20 pmKGS-BOS
25h 30m1 stop
$1,286SWISS
Find Deal
Sat, Aug 10 - Sat, Aug 17
9:45 pm - 10:00 amBOS-KGS
29h 15m1 stop
8:50 pm - 3:20 pmKGS-BOS
25h 30m1 stop
$1,302
Find Deal
Sat, Aug 10 - Sat, Aug 17
10:20 am - 2:25 pmBOS-KGS
21h 05m2 stops
8:50 pm - 3:20 pmKGS-BOS
25h 30m1 stop
$1,307
Find Deal
Sat, Aug 10 - Sat, Aug 17
5:10 pm - 10:00 amBOS-KGS
33h 50m1 stop
11:05 am - 3:20 pmKGS-BOS
35h 15m2 stops
$1,329SWISS
Find Deal
Sat, Aug 10 - Sat, Aug 17

Good to know

Cheapest flight

$1,107
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
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.

FAQs for booking flights from Boston to Kos

  • What is the cheapest flight from Boston to Kos?

    In the last 3 days, the lowest price for a flight from Boston to Kos was $1,107 for a round-trip ticket.

  • Do I need a passport to fly between Boston and Kos?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Boston and on arrival in Kos.

  • Which aircraft models fly most regularly from Boston to Kos?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to Kos?

    Star Alliance is the only airline alliance operating flights between Boston and Kos.

  • Which is the best airline for flights from Boston to Kos, SWISS or Lufthansa?

    The two airlines most popular with KAYAK users for flights from Boston to Kos are SWISS and Lufthansa. With an average price for the route of $1,330 and an overall rating of 7.7, SWISS is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $1,184 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from Boston to Kos?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Kos.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Kos?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kos from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Kos?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Kos with an airline and back to Boston with another airline. Booking your flights between Boston and KGS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Kos?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Kos from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from Boston to Kos

 
See real verified KAYAK customer reviews for airlines flying from Boston to Kos. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Kos? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.7
SWISSOverall score based on 1996 reviews
7.4Food
8.4Crew
7.6Comfort
7.9Boarding
7.2Entertainment
Airline reviews

Carry on luggage size for economy passengers significantly smaller than other airlines, so nearly all ecomy passengers had their bags taken and checked.

2.0 MediocreE, May 2024ORD - ZRH
Read more about SWISS reviews

Carry on luggage size for economy passengers significantly smaller than other airlines, so nearly all ecomy passengers had their bags taken and checked.

Had a short layover in Zurich, luggage marked expedite and short layover but still didn’t get luggage when arrived in Split until 3 days later even though husband got his.

On time flight, I requested wheelchair in Zurich , when I arrived they were no where to be found, I had one hour between flights I had to walk with great difficulty.

Far above average. The level of quality and service has really improved and passed most US carriers on this route. Go Edelweiss!

We had issues with upgrading our seats. The flight itself was fine.

Horrible experience. They "GAME" with seats they decided to play where you can`t select or get seat during check-in without paying and then forcing you to stay long line at the Customer Service at the gate to get a boarding ticket with seat assigned is pathetic. Will never fly with United again!

So terrible. They would not rebook me for a flight until 2 days. I had to spend so much money to get my own flight. They were rude and not helpful.

Overall a good experience, the flight was on time, the crew very attentive and friendly. However the seats are too cramped, there is no space, and as soon as the person in front reclines the seat, it's literally in your face.

Bag lost. Lost bag recovery process is an unsatisfying customer experience. Because 1) bag is still lost but also 2) the process is outdated and form-heavy and 3) in our case also involved a long line.

We were very impressed with Swiss Air. The service was exceptional. Unfortunately, we had a baby behind us that screamed for hours. , It was a nightmare, though I completely understand that it was not Swiss Airs fault.

Everything could be better. The plain was in Orlando for 3 hours prior to boarding. After boarding all the passengers they found out that plane has a mechanical problem. After an hour the problem was solved, the pilot comes on and states, (We have to go back to the gate and take on more fuel!) Are you kidding me???? Who they have for pilots, Boy scouts?? I barely made my connecting flight to Vienna, but my suitcase did not. I'm still waiting for it, in Gyor, Hungary. Am I having fun yet?? Other passenger were in the same binned. I travelled all over the world both for business and pleasure with all types of airlines. By far of all the carriers I travelled with, Discover is the worst. I'm contemplating to bight the bullet and go back to the US with a different carrier. For International flights, the seats are made for little people. The person in front of me had his seat reclined the whole way, I felt like he was sitting in my lap. For closing, I would not let my dog travel with Discover, yet alone recommend it to an other person. Does it sound like I'm frustrated, Think about having to travel back to the US with them. I'm sure I'll not hear back from you, because nobody wants to hear about bad news, but with all the hype Discover puts out there about their services, nothing could be further from the truth. Joseph A. Nagy

Only problem we experienced was not anything to do with Lufthansa. When changing planes in Frankfurt we spent over an hour on passport control line. Lufthansa did a marvelous job on everything from keeping me informed via texts, to terrific cabin crew.

Bordón could be bettet if the company say before boarding the order of the different groups.

Checked in is easy and it was a smooth flight from LAX to Munich

There is no recline on flight from DFW to FRA. Middle eastern airways provide better recline option for the same class. FRA to Bangalore has better recline option. I bid 100$ for premium economy, my request was declined. But staff handled it without issues.

The Lufthansa part was wonderful. The short connection flight was not.

German crew were very kind. Food was okay but can be better, especially bread was not good, Garbage collection was very poor.

Awful Terrible staff poor communication Flight delayed for an hour with no apology or explanation and no help re missing connecting flight. Resulted in a 7 hour layover at Munich waiting for another connecting flight. Only 15 euros refreshment voucher given. Will not fly Lufthansa again

Both flights were late for what appeared to be the airline’s not having the planes ready. Arrived over 6 hours late.

It was a busy flight and all the crew were very helpful and gracious

Boston - Kos Flights

Departure:

Boston (undefined)United States

Destination:

Kos (KGS)Greece

Cabin classes:

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