Ryanair posted a 20 percent rise in adjusted full-year net profit on Tuesday but warned if oil prices stay at around USD$130 a barrel it would expect to only break even in the year ahead.
Net profit excluding one-off items rose to EUR480.9 million euros (USD$748 million) in the 12 months to the end of March versus EUR401.4 million a year earlier.
Europe's biggest low-cost carrier said, however, its unadjusted net profit fell to EUR390.7 million from EUR435.6 million a year earlier once it had included exceptional items, including a EUR91.6 million write down in the value of its stake in Irish rival Aer Lingus.
Ryanair said it was better placed than all other European airlines to absorb higher oil costs, even if it means profits fall in the short term.
"Based on forward bookings, we now believe it likely that average fares for the coming year will rise by approximately 5 percent and if oil prices remain at USD$130 per barrel, then we expect to accordingly breakeven for fiscal '09," Chief Executive Michael O'Leary said in a statement.
The airline had previously said it expected a 6 percent rise in net profit this year at best, although its worst-case scenario had been for a 50 percent drop.
Ryanair, which said last month its fuel needs were mostly unhedged for the current year, predicted oil would become cheaper over the medium term, helping its earnings rebound strongly, but it was not sure when this would happen.
"Higher oil prices will increase the attraction of Ryanair's guaranteed lowest fares, as consumers become more price sensitive, as competitors increase fares and fuel surcharges, and as many European airlines consolidate or go bust, a development which we believe is inevitable if oil prices remain above USD$100 this winter," O'Leary said.