>>>Let's get realistic. Even if you compare Ryanair's fares to realistic fares that you can obtain from LH, AF or AZ, there is quite an important gap.
OK let´s see. Yesterday I booked a flight FRA-LHR-FRA, same day return, in about four weeks, on a Saturday.
Flight ticket price including all taxes - 181 EUR
Ticket price for public transportation from my place to FRA and back: 6.30 EUR
TOTAL - 187.30 EUR
Now, I go to the FR website and pretend to book a flight with the same date. OK, first problem: I can´t be at HHN for the 0655 flight - and if I take the second flight out of HHN, the latest return flight leaves STN before I arrive there. So no weekend day trips for me. Well, so let´s check one day earlier: a day trip is possible. But the maximum stay I can get is a little less than six hours. With the ticket I´ve booked now, it´s 12 hours. But never mind, let´s just have a look at the prices.
Flight ticket HHN-STN - 49.99 EUR
Flight ticket STN-HHN - 39.99 EUR
Taxes HHN-STN - 8.42 EUR
Taxes STN - HHN - 26.26 EUR
Ticket prices for public transportation from my place to HHN and back: 29.18 EUR
TOTAL - 153.84 EUR
So, my ticket is 33.46 EUR more expensive. But it´s less hassle (My place -> HHN: train, train, train, train, bus; my place -> FRA: train), doubles the effective time to spend at London and I don´t have to go on a working day. So for me, the product Ryanair offers is not really convincing.