Ryanair today (October 1) called on four legacy carriers to cut their "unjustified" fuel surcharges.
Europe's largest low cost carrier said fuel prices had fallen by more than 30% in recent weeks but BA, Air France, Lufthansa and Aer Lingus had not cut their surcharges.
Its spokesman Stephen McNamara said Ryanair had promised never to introduce a fuel surcharge.
He added: "Greedy airlines need to realise that passengers are no longer willing to pay unjustified fuel surcharges.
"Airlines such as BA, Air France, Aer Lingus and Lufthansa were quick to impose and increase fuel surcharges as fuel prices rose.
"However, they are less responsive to the fall in fuel prices and passengers are yet to see any of these airlines reduce or remove the surcharges they impose."
BA said oil was now its largest cost and represented 35% of its cost base.
It added: "Although the spot price of oil has dropped in recent weeks, the market remains volatile with Opec again looking to cut its output.
"As the pound continues to weaken against the US dollar, our overall annual fuel bill which is paid for in dollars, has not in fact reduced.
"Sterling has declined 11% against the dollar in the last six weeks, the sharpest fall since the UK dropped out of the Exchange Rate Mechanism in 1992.
"We keep our fuel surcharges under constant review and will adjust them as and when we feel it is appropriate to do so."
A spokeswoman for Lufthansa said it "slightly" raised in surcharge on July 11.
"We constantly monitor the price and future adjustments will depend on the trend in the price of jet fuel.
"We have no plans to adjust it at the moment."
Visit www.ryanair.com, www.ba.com and www.lufthansa.com