$107 Cheap Flights from Bucharest (OTP) to Kos (KGS)

View $107 flight on Tue, Sep 16, 2025Opens in a new window

Popular airlines from Henri Coanda Intl. Airport (OTP) to Kos (KGS-Kos Island Intl.)

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Cheap Flights from Bucharest to Kos (OTP-KGS)

Prices were available within the past 7 days and start at $107 for one-way flights and $229 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aegean
Tue, May 12 - Wed, May 20
OTP
Bucharest
KGS
Kos
$229 Roundtrip, found 1 day ago
$229
Roundtrip
found 1 day ago
Select Aegean flight, departing Tue, May 12 from Bucharest to Kos, returning Wed, May 20, priced at $229 found 1 day ago
Lufthansa
Wed, Aug 27 - Fri, Sep 5
OTP
Bucharest
KGS
Kos
$236 Roundtrip, found 1 day ago
$236
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Aug 27 from Bucharest to Kos, returning Fri, Sep 5, priced at $236 found 1 day ago
Austrian Airlines
Wed, Aug 27 - Fri, Sep 5
OTP
Bucharest
KGS
Kos
$237 Roundtrip, found 1 day ago
$237
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Wed, Aug 27 from Bucharest to Kos, returning Fri, Sep 5, priced at $237 found 1 day ago
Lufthansa
Wed, Aug 27 - Fri, Sep 5
OTP
Bucharest
KGS
Kos
$250 Roundtrip, found 1 day ago
$250
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Aug 27 from Bucharest to Kos, returning Fri, Sep 5, priced at $250 found 1 day ago
Aegean
Tue, Sep 16 - Tue, Sep 23
OTP
Bucharest
KGS
Kos
$255 Roundtrip, found 1 day ago
$255
Roundtrip
found 1 day ago
Select Aegean flight, departing Tue, Sep 16 from Bucharest to Kos, returning Tue, Sep 23, priced at $255 found 1 day ago
Lufthansa
Tue, May 12 - Wed, May 20
OTP
Bucharest
KGS
Kos
$257 Roundtrip, found 1 day ago
$257
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Tue, May 12 from Bucharest to Kos, returning Wed, May 20, priced at $257 found 1 day ago
Lufthansa
Tue, May 12 - Wed, May 20
OTP
Bucharest
KGS
Kos
$265 Roundtrip, found 1 day ago
$265
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Tue, May 12 from Bucharest to Kos, returning Wed, May 20, priced at $265 found 1 day ago
Lufthansa
Mon, Sep 29 - Fri, Oct 17
OTP
Bucharest
KGS
Kos
$275 Roundtrip, found 1 day ago
$275
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Mon, Sep 29 from Bucharest to Kos, returning Fri, Oct 17, priced at $275 found 1 day ago
Austrian Airlines
Wed, Sep 10 - Mon, Sep 29
OTP
Bucharest
KGS
Kos
$276 Roundtrip, found 1 day ago
$276
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Wed, Sep 10 from Bucharest to Kos, returning Mon, Sep 29, priced at $276 found 1 day ago
Swiss International Air Lines
Tue, Sep 16 - Tue, Sep 23
OTP
Bucharest
KGS
Kos
$278 Roundtrip, found 1 day ago
$278
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Tue, Sep 16 from Bucharest to Kos, returning Tue, Sep 23, priced at $278 found 1 day ago

Alternative airports near Kos

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Kos Island Intl. KGS. Cheapest and Closest option available. Average driving time to city center is 25 minutes. Flights from $332
KGS
Kos Island Intl.
CheapestClosest
Average driving time to city center25 min
Flights from $332
Flights from Bucharest (OTP) to Kos (KGS)
Origin airport
Henri Coanda Intl.
Destination airport
Kos Island Intl.
Airlines serving
Aegean, Austrian Airlines, Lufthansa, Swiss International Air Lines
Roundtrip price
$228
Distance
539 mi

Bucharest to Kos Flights

The cheapest times to fly from Bucharest to Kos

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Bucharest to Kos are during the month of May. You can find some of the cheapest flights from Bucharest to Kos with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Bucharest to Kos

Sunday is one of the best days to book for cheap flights from Bucharest to Kos: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Bucharest to Kos

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Bucharest to Kos in 2025. You can also book with separate airlines for your outbound and return journeys, from $107 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Bucharest to Kos flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Bucharest to Kos airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS) cost?
Snag a cheap one-way flight from $107 or cheap return flight from $229 from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS)?
Planning your getaway for May may help you find better deals, as it's the cheapest month for flights between OTP and KGS. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS)?
To find the cheapest airline that'll fly you from OTP to KGS, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS)?
There aren't any daily direct flights available from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from OTP to KGS?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS)?
Opt for a flight from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS) last-minute?
Booking your flight from OTP to KGS right before your getaway is usually more expensive. However, if you're flexible with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book an OTP to KGS flight and hotel package?
Opting for an OTP to KGS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Select from our impressive range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Henri Coanda Intl. Airport (OTP) to Kos Island Intl. Airport (KGS)?
If you booked your OTP to KGS flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.