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I am far far away..I'm from Malaysia ...but I got cheap flight ticket last time to Istanbul but to London always super expensive :(

Pegasus is not the cheapest options I think. I used Turkish airlines last time and it was cheaper than Pegasus. and the airport which you land is important for London I think :) Because the airport which pegasus lands has a train to centre and it was 20 £ each as I remember. Keep in mind 😉

Yeah THY sometimes give better prices but its rare - our arrival flight is THY, return is pegasus. That was the cheapest for our case. :)

Also booked trains online 12 pounds per person from city centre to Stansted for the return.