The ads, which will run in national newspapers, do not directly refer to the programme, but carry the headline 'An apology'. The ad makes it clear that the apology is directed to Ryanair's competitors, as its fares are lower. Three million free seats will be offered as part of the promotion.
The campaign follows claims made on Ryanair: Caught Napping. Channel 4 claimed undercover footage revealed security lapses, dirty aircraft, pilots complaining about long working hours and exhausted cabin crew.
Two reporters spent five months secretly filming the airline's training programme and flights as members of cabin crew.
Ryanair has taken the unusual step of publishing its correspondence with Channel 4 about the allegations on its website, and is holding a light-hearted 'Oscars' for staff who unknowingly appeared in the documentary.