Travelling from most locations, it is best to book your flight to Klagenfurt during the month of March for the best deal, although there are other times of the year which offer great deals as well.
In general, most flyers find the cheapest time to book a flight to Klagenfurt is about 45 days prior.
Most of our users find that booking their departure to Klagenfurt on a Wednesday is the cheapest. Conversely, departing on a Friday seems to be the most expensive.
On average you can find the best deals on plane tickets to Klagenfurt when looking for flights with morning departure times.