Go through your results for flights to Preveza/Lefkas in Greece with Netflights. The most popular airlines for this route are British Airways & Austrian Airlines, with British Airways claiming the top spot. Although Thomas Cook Airlines usually has the best prices, it's best to double check what's available for your travel dates.
If these flights are too expensive, try searching for a different time of year. So if your dates are flexible, consider looking at different times of year.
Preveza/Lefkas receives nine direct and indirect flights every week, but the cheapest airline is normally Thomas Cook Airlines. So, if the flights to Preveza/Lefkas don't work for you, you could always try searching for flights to other airports in Greece.
For even more options, check what other airports you could fly to Preveza/Lefkas from. You might be able to make a saving by going from a different airport or city. The most popular airports with direct flights to Preveza/Lefkas are London Heathrow (LHR).