Christ Church, the Church Centre, and the Shop are located next to the British Embassy in Vienna's third district and very easy to access via public transportation (information listed below).
Christ Church: Jaurèsgasse 17-19.
Church Centre: Salesianergasse 24.
Church Shop: Salesianergasse 20.
As parking is somewhat limited in the area, the best options for finding the Church are on Vienna's extensive public transportation system. Three options include:

Tram 71
Take the 71 Tram (Strassenbahn) to Unteres Belvedere. You will exit the tram at the corner of Rennweg and Salesianergasse, just one street away from Jaurèsgasse. Please note: the 71 tram does not run beyond Schwarzenbergplatz on Sundays before 8am. If taking the 71 to our 8am service, you will need to take another tram to Schwarzenbergplatz and switch to the 71 there.

Metro (U4 U-Bahn Line)
Take the U4 Metro (U-Bahn) to Stadtpark. Walk along Johannesgasse and then along Salesianergasse approximately 4-5 streets to Jaurèsgasse. It is about 650m from the station to the church building.

Commuter Trains (Schnellbahn Lines)
If you are staying further outside of the city or prefer the commuter trains (Schnellbahn), you can take any of the lines that stop at the Rennweg train station (S1, S2, S3, S4, and S7). Exit through the north entrance/exit (away from Rennweg) and take the long ramp down to Jaurèsgasse. Walk toward away from the tracks approximately 2-3 streets. It is about 450m from the station to the church building. If you exit through the Rennweg entrance/exit, walk along Rennweg to Salesianergasse and then right to Jaurèsgasse.

Bus 4A
There is also the 4A bus. It stops at Modena Park, about 300m from the church. The bus route is from Karlsplatz to Witteslbachstasse with connections to both the U3 at Rochusgasse and the U4 at Karlsplatz.

For more information and to plan transportation schedules, visit the Wiener Linien website and use their planning tools.