Travellers looking to book trips between September and the end of January have until midnight tonight to take advantage of a Ryanair seat sale.

Between 00.01hrs on Wednesday and 24.00hrs today, the Irish carrier is marking the 30th anniversary of its first flight by offering one million seats across its entire network for €19.85.

Since its first flight from Waterford in Ireland to London Gatwick took off on July 8, 1985, Ryanair has grown to include more than 1,600 routes in 30 countries across Europe and north Africa.

The special birthday seats have to be booked through the Ryanair.com website. Chief marketing officer Kenny Jacobs said: “Ryanair revolutionised and democratised air travel in Europe and 30 years on, we save European customers more than €11 billion every year by choosing Ryanair over high-fare competitiors. In fact, this €19.85 sale will save customers a further €125 million.”