oil price is the killer
The only way that any of the lowcosts are making money is the luck in hedging the oil price.
I think easy have a $60 cap and Ryanair got there "oil" at $47/barrel. The current market price is about $67 barrel. It is only a short term life line. Everyone is going to have to pay more for the air fare. It will only be a few pounds per pax but will hurt ryanair the most as £3 on a "99p" fare will make the biggest change. Maybe the wheelchairs users can be charged another £300, that to be fair will become an extra £3 surcharge.
The initial rise in fuel cost was offset by a rise in load factor by those who did not rise prices. This cannot rise much more as most sensable timed flights must be farely full and 6am takeoffs on midweeks must always have spaces.