Venice: Taxi from Port to Airport

[ECBoca2]

Can anyone give me an educated guess what the charge would be for 2 people for a taxi from the Port in Venice to the aiport on debarcation
day?
I got a price from a car service of 50 EU and I'm wondering if a taxi would be any cheaper?
Thanks for your reply!

[Mike Andrews]

The Taxi fare should be around 30 €Euros according to the tourist office figures.

[chrob]

Is this to marco Polo airport or Treviso?