Nein ist meine Tochter 24
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Airport to Wien Mitte (Vienna) 15 Euro return 16 mins every half hour
Wien Mitte to Weiner Neustadt - 30 Euro return 40 mins (fairly regular)
Therefore 45 Euros
Taxi ?? no idea but they are probably like every other taxi, prices being negotiable for a long journey. I would think that you would have to have 4 of five to a taxi in order for it to come in at around the same price.. So it"s the trains for me I reckon.