Cheap Flights from Sofia (SOF) to Kos (KGS)

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Flight deals from Sofia to Kos

Looking for a cheap last-minute deal or the best round-trip flight from Sofia to Kos? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Sofia to Kos

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Sofia to Kos flights are currently cheapest in November.

Sofia to Kos: Flight information

The things to know before you go.
Cheapest flight found$61
Cheapest month to flyNovember

Finding cheap flights from Sofia to Kos: Frequently asked questions

The best price we found for a round-trip flight from Sofia to Kos is $165. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Sofia to Kos. But we found flights with one or more stops from $166.
There are no flights flying from Sofia to Kos, as of May 2025.
The cheapest month to fly from Sofia to Kos is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Sofia Airport to Kos Airport on Friday, July 18, 2025.
No airlines currently offer direct flights between Sofia Airport and Kos Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Kos but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Kos is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Aegean Airlines offers the cheapest flight tickets to Kos.

Traveling from Sofia Airport (SOF) to Kos Airport (KGS): what you need to know

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This ensures you have enough time to catch your SOF to KGS flight.

  • Traveling during a peak period like school or public holidays? Expect longer queues at security and check-in. To be on the safe side, arrive up to four hours before international flights and two hours before domestic departures.

  • If you'd like to break up your flight, simply uncheck 'Direct flights only' when searching for your ticket from Sofia Airport to Kos Airport. These are the top stopovers between SOF and KGS:

    • Eleftherios Venizelos International Airport

    • Vienna International Airport

    • Milano Malpensa Airport

How to find the cheapest flights from Sofia Airport (SOF) to Kos Airport (KGS)

  • $61 is the best price for a one-way Sofia Airport to Kos Airport flight. A return flight starts at $165. These prices can change depending on availability.

  • To find cheap tickets from SOF to KGS, book early. Airlines typically offer the most competitive fares when flights are first released.

  • Finding cheap flights from Sofia Airport to Kos Airport is more likely if you're flexible with your trip dates. Use the 'Whole month' search tool to see the lowest fares across each month and land a great deal.

  • You don't need to check back in every day to find out if fares have dropped when you create a Price Alert. We'll let you know as soon as there's a change in price on cheap flights from SOF to KGS.

  • Secure the ideal flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Sofia Airport to Kos Airport, use the 'Sort by' function. You can also filter by departure and arrival times, airline, and number of stops.

Handy information about Sofia Airport (SOF)

  • When it comes to the on-time performance of Sofia Airport, 66.73% of flights complete their journey on time.

  • Central Sofia to Sofia Airport is approximately 7 miles. Depending on traffic, it'll take you about 15 minutes to get there if you're driving, catching a cab or ride-sharing.

  • The journey on public transport typically takes 35 minutes.

  • Booked an early flight from Sofia Airport to Kos Airport? Avoid the last-minute rush to the airport (and get some extra shut-eye) by picking one of these hotels close to SOF:

Arriving at Kos Airport (KGS)

  • To get the best deal, book your vehicle from Kos Airport about three weeks before traveling.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.