It is really rather silly that Ryanair insists that Passports must have at least 3 months of validity before their expiry date. Surely the expiry date is just that - that anyone should be allowed to use their Passport for travel up to the expiry date.
I have no idea why Ryanair has made this rule, and I would question its legality.
Having said that, Helsinki to Alicante for 27 Euros with Ryanair ain't bad, nor is Alicante to Manchester for 22 Euros with Mick's Scratchcard Express!