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 British Airways. They are 91% cheaper than United Airlines. (Average prices, based on 794 datapoints.)
At Frankfurt the most flights depart around 18:00. (Hourly flights, based on 1366 datapoints.)
From Frankfurt most of the flights depart to London, second best connected from Frankfurt is Munich. (Daily flights, based on 140 datapoints.)