Ryanair website but you'll need to do so by midnight tomorrow (Friday 27th November) when the sale ends, reports the Mirror.
It's worth noting that there are some destinations which the FCDO advises against all but essential travel to, so you should check the latest FCDO advice for your chosen getaway before you book, plan or go on a trip.
Ryanair’s Director of Marketing, Dara Brady said: "We’re launching this not-to-be-missed Black Friday offer with more routes available than any previous Ryanair ‘Buy One Get One Free’ offer, just in time for Christmas travel planning.
Book from 3pm today for travel from 1 December 2020 until 27 March 2021 across 1,700 routes and get a second ticket on the same flight for free.Customers can book this.
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