If you are looking at Monarch flights - this may make them competitive:
Introducing our biggest sale ever with a guaranteed £25 off per person on all return scheduled flights from October 1st.
Get £25 off millions of seats, all dates from 1st October 13, all routes.
It doesn’t get much bigger than that, so to claim the discount simply enter the code HUGESALE on the payment page of the booking path and see the overall price drop.