$80 Cheap Flights from Bucharest (OTP) to Kos (KGS)

View $80 flight on Wed, Oct 15, 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 $80 for one-way flights and $217 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Austrian Airlines
Mon, Sep 1 - Wed, Sep 10
OTP
Bucharest
KGS
Kos
$217 Roundtrip, found 5 days ago
$217
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Sep 1 from Bucharest to Kos, returning Wed, Sep 10, priced at $217 found 5 days ago
Aegean
Mon, Sep 1 - Wed, Sep 10
OTP
Bucharest
KGS
Kos
$221 Roundtrip, found 5 days ago
$221
Roundtrip
found 5 days ago
Select Aegean flight, departing Mon, Sep 1 from Bucharest to Kos, returning Wed, Sep 10, priced at $221 found 5 days ago
Aegean
Sun, Sep 14 - Sun, Sep 21
OTP
Bucharest
KGS
Kos
$231 Roundtrip, found 5 days ago
$231
Roundtrip
found 5 days ago
Select Aegean flight, departing Sun, Sep 14 from Bucharest to Kos, returning Sun, Sep 21, priced at $231 found 5 days ago
Austrian Airlines
Mon, Sep 1 - Wed, Sep 10
OTP
Bucharest
KGS
Kos
$235 Roundtrip, found 5 days ago
$235
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Sep 1 from Bucharest to Kos, returning Wed, Sep 10, priced at $235 found 5 days ago
Austrian Airlines
Mon, Sep 1 - Wed, Sep 10
OTP
Bucharest
KGS
Kos
$239 Roundtrip, found 5 days ago
$239
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Sep 1 from Bucharest to Kos, returning Wed, Sep 10, priced at $239 found 5 days ago
Aegean
Thu, Sep 4 - Thu, Sep 11
OTP
Bucharest
KGS
Kos
$240 Roundtrip, found 4 days ago
$240
Roundtrip
found 4 days ago
Select Aegean flight, departing Thu, Sep 4 from Bucharest to Kos, returning Thu, Sep 11, priced at $240 found 4 days ago
Aegean
Sun, Sep 14 - Sun, Sep 21
OTP
Bucharest
KGS
Kos
$242 Roundtrip, found 5 days ago
$242
Roundtrip
found 5 days ago
Select Aegean flight, departing Sun, Sep 14 from Bucharest to Kos, returning Sun, Sep 21, priced at $242 found 5 days ago
Aegean
Mon, Sep 1 - Wed, Sep 10
OTP
Bucharest
KGS
Kos
$250 Roundtrip, found 5 days ago
$250
Roundtrip
found 5 days ago
Select Aegean flight, departing Mon, Sep 1 from Bucharest to Kos, returning Wed, Sep 10, priced at $250 found 5 days ago
Swiss International Air Lines
Wed, Jul 30 - Wed, Aug 6
OTP
Bucharest
KGS
Kos
$262 Roundtrip, found 4 days ago
$262
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Wed, Jul 30 from Bucharest to Kos, returning Wed, Aug 6, priced at $262 found 4 days ago
Lufthansa
Mon, Sep 1 - Wed, Sep 10
OTP
Bucharest
KGS
Kos
$265 Roundtrip, found 5 days ago
$265
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Sep 1 from Bucharest to Kos, returning Wed, Sep 10, priced at $265 found 5 days ago
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
$217
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 September. 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 $80 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?
Discover the latest flight deals from OTP to KGS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from OTP to KGS?
The cheapest flights from OTP to KGS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from OTP to KGS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from OTP to KGS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
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.