Cheap flights from Athens to Kos from £51

The cheapest month to fly to Kos from Athens is in March. Flight prices, which tend to average around £78, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Kos from Athens during December instead. Flights to Kos in December, while not as cheap as those in March, still average around £83.

According to our data, Tuesday is the cheapest day to fly to Kos from Athens. The lowest ticket price found for a Tuesday departure recently was £109. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Kos is Monday, with ticket prices averaging around £223.

Fly from Athens Eleftherios V. to Kos for the best Athens Eleftherios V. - Kos flight prices

You are more likely to see cheaper flights to Kos from Athens when booking weeks ahead of your departure date. In general, you can expect to find flights to Kos for around £106 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Kos from Athens for as low as £84 on momondo.

There is only 1 cabin class available to choose from on Athens Eleftherios V. to Kos flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of February 2026, prices for Athens to Kos flights are approximately 6% cheaper when compared to flights at the same time last year.

Historically, on average around 22% of flights between Athens and Kos have experienced a delay on any given week. The average delay length over the past 12 months has been 77 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Sunday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Olympic Air have had the fewest delays on this route over the last 12 months, with about 17% of their flights experiencing any sort of delay.

As of February 2026, there are 6 flights per day flying from Athens to Kos. The most common time of day flights depart is 10:00, with 51% of flights taking off at midday.

The number of flights available between Athens and Kos is 45 per week as of February 2026. The most frequent departure day is Fri, with 22% of weekly flights leaving on this day.