The Irish airline said oil prices had increased costs meanwhile Brent crude surpassed $90.
Ryanair has also warned passengers travelling to Europe this summer to prepare for extended waits.
A man was nearly sucked head-first out of a cabin window mid-air on a Ryanair plane.
Svetlana Grkoviฤ told Serbian media that her husband is "seriously injured and in shock".
Ryanair confirm a passenger was given medical treatment after an incident on a Malta Air flight, which is owned by Ryanair.
A man was nearly sucked out of the window of a Ryanair flight when it โdetachedโ mid-air en route to Germany, with other passengers pulling him back inside, witnesses and officials said. The passenger, described as a tourist from Serbia on a flight from Thessaloniki in Greece to Memmingen in Germany, has been hospitalised with friction burns but was otherwise in good condition, authorities said. โMost of us had fallen asleep, we had closed our eyes. There was a noise, like a tyre bursting,โ a...