Just had another read of the HEL to LHR consideration of Ryanair. They can do this sector very cheaply, if you are lucky. However, the US150, AU200 or GBP 75 for this single is better value if you start to consider the time aspect and the bus fares. The bus from Helsinki centre takes 2.5 hours and will arrive with about 1.5 hours to go. The fare will be about £10. The taxes are about £10. Therefore, the best you are going to do on this part is around £25. The bus fare from STN to LHR costs around £20 and takes about 1.5 hours with departures about every 2 hours, from memory. This gives a total of around £45.

The LHR option will cost around £85 but be much quicker. Also the STN flight lands late at night when it is notoriously difficult to get out of the airport. I have done it and taken the bus to LHR arriving at 0215. Uggh.

To clarify the PPT, you cannot use an add on xONEx coupon for this but you have to buy a totally separate ticket.