Going by taxi from the airport to city centre.

Going by taxi from the airport to city centre.

How much is it going a taxi journey cost?

Taxi fares

There are several fares in Zaragoza for taxis.
Fare 1 is for weekly days. Fare 2 is for night and weekend services (22:00 to 6:00).
Fare 3 and 4 are the same ones but used for not inner city. This is... if you go from city centre to anywhere out of inner city they will apply fare 1 (or 2) until one specific point (there are signals in the street/road) and later fare 3 (or 4) which is more expensive.
If you go out of Zaragoza municipality territory, fare will be calculated based in kilometres (but there is not many difference, indeed, with the fare numbers price).
The total cost will depend even of the time that they have been waiting (or going under 20 km/h), even of kilometres.
This is, you can consider the number of kilometres as an estimation but in a traffic light in red the price will increase a little because "waiting time". And it will be more expensive if the taxi is in a traffic congestion and running slowly than if it goes faster (if it drives fast you will notice that taximetre will run fast too... but you will arrive to destination fast too also).
Furthermore, there is a specific extra fare if the taxi departs from the airport.

so... how is it going to cost me?

It is not easy to calculate, but taxi drivers have set this pannel in the airport where you will take a taxi, in English and Spanish and you will be able to check fares. They are just approximate. Final fare to pay is which would be indicated in the taximetre in any case. But it is written for weekends and for weekly days. So you can decide if taking a taxi or not.
As an example, "city centre" will cost 19 or 26 euro depending of weekly days or weekend.
Railway and bus station (Estacion Delicias) will cost 17 to 22.
Hospital Miguel Servet and Hospital Clinico are 18/19 to 23/24 euro (they are quite near).
The rest of destinations are for other towns in the nearby, exhibition centre or industrial areas.
As said... it is not official but you can know, more or less, how much will it cost to you.

Is there any other option for mobility?

Yes. Every 30 minutes Monday to Saturday and 60 minutes in Sunday there is a bus that takes you from the airport to Delicias railway and bus Station and to city centre.
A single ticket costs 1,70 euro so you can decide if it wonders to take a taxi or not.
Time for a bus to city centre is about 30 minutes. Final stop is in P. Maria Agustin, corner with Cesar Augusto.
should you have a bus card or so, inside Zaragoza, connecting with another bus or tramway is free.