Ryanair says a court in Hamburg has granted it interim injunctions against German travel search engine, Skyscanner.de.
The airline claims the case relates to the website's alleged display of Ryanair fares with a hidden mark-up that lead to higher fares than those on Ryanair.com.
It also claims Skyscanner was displaying total flight costs without publishing fees it was adding.
The Dublin based carrier also alleges the German website was displaying a price for checked-in luggage higher than the price charged by Ryanair.
Ryanair also sought to prevent the website from allegedly providing false passenger email addresses to it.
The case is the latest taken by the airline against so-called "screenscraper" websites across Europe.
The company says the action is aimed at preventing consumers from being misled and from having unnecessary charges imposed.
According to Ryanair, such third party websites often fail or refuse to pass on important flight information to customers and the airline itself.
"We again urge consumers to avoid screenscrapers such as Skyscanner and book directly on the Ryanair website, the only place to find the lowest Ryanair fares and fully transparent pricing on ancillary," said Kenny Jacobs, Ryanair's Chief Marketing Officer.
In a statement, a Skyscanner spokesperson said it does not comment on any ongoing disputes.
"However, we do not charge travellers any fees or markups and we will continue to work in their best interests, as we strive to provide them with the greatest possible choice," they said.