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 March and the most expensive month to fly is August. (Average prices, based on 1027 datapoints.)
The best day to arrive at Frankfurt is Sunday and it would be best to avoid Saturday, as prices are on average 68.4% higher than on Sunday. (Average prices, based on 1059 datapoints.)
The cheapest airline flying to Frankfurt is British Airways. They are 92% cheaper than United Airlines. (Average prices, based on 1210 datapoints.)
At Frankfurt the most flights depart around 18:00. (Hourly flights, based on 1932 datapoints.)
From Frankfurt it is on average the cheapest to fly to Amsterdam and to Brussels. (Average prices, based on 171 datapoints.)
From Frankfurt most of the flights depart to London, second best connected from Frankfurt is Munich. (Daily flights, based on 165 datapoints.)