Please be aware that Frankfurt has multiple airports and that these results are for all airports serving the city.
The best month to arrive at Frankfurt is July and the most expensive month to fly is February. (Average prices, based on 625 datapoints.)
The best day to arrive at Frankfurt is Sunday and it would be best to avoid Wednesday, as prices are on average 53.7% higher than on Sunday. (Average prices, based on 597 datapoints.)
The cheapest airline flying to Frankfurt is Croatia Airlines. They are 92% cheaper than United Airlines. (Average prices, based on 768 datapoints.)
At Frankfurt the most flights depart around 18:00. (Hourly flights, based on 1177 datapoints.)
From Frankfurt it is on average the cheapest to fly to Istanbul and to Amsterdam. (Average prices, based on 146 datapoints.)
From Frankfurt most of the flights depart to Berlin, second best connected from Frankfurt is Milan. (Daily flights, based on 112 datapoints.)