The Airport Taxi's run 24 hours so you won't have a problem getting one - they are all licensed and insured etc. Cost will be approximately €110.
You might be able to get it a little cheaper if you do a return via a transfer company however that will depend if your return time is not in peak time (10pm - 6am) in which case you can reduce the cost considerably by using public transport which is very easy and cost effective.Edited: 17 March 2014, 13:53
taxi will cost a fortune, have a look at a shuttle company.
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