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 January and the most expensive month to fly is February. (Average prices, based on 700 datapoints.)
The best day to arrive at Frankfurt is Thursday and it would be best to avoid Friday, as prices are on average 66.18% higher than on Thursday. (Average prices, based on 663 datapoints.)
The cheapest airline flying to Frankfurt is British Airways. They are 84% cheaper than Cathay Pacific. (Average prices, based on 747 datapoints.)
At Frankfurt the most flights depart around 23:00. (Hourly flights, based on 825 datapoints.)
From Frankfurt it is on average the cheapest to fly to London and to Amsterdam. (Average prices, based on 488 datapoints.)