By Train from Salzburg (Austria) to München / Munich (Germany) - Option 1: travel on the express trains and save money if you can book in advance

*During the day the timetable is arranged so that departures in the even hours are the EC trains and those in the odd hours are the Railjet trains.

There are also alternative Regional trains between Salzburg and Munich/Munchen, operated by Meridian, which depart hourly.

Final Destination: 
Munchen Hbf (Railjets)
Frankfurt or other (EC trains)

The EC trains) also call at: Munchen-Ost but the Railjets do not.

Munchen Ost for the city centre and Munchen Flughafen/Airport:

If the end point of your journey is in central Munchen/Munich, around Marienplatz - then the quickest option is to leave a train at Munchen Ost station and connect there into an S-Bahn (local train) to the city centre.

In Munchen/Munich the S-Bahn trains are similar to Metro trains as they cross the city centre in a tunnel.

If you are heading to Munchen Flughafen/Airport from Salzburg by train then definitely make the transfer between trains at Munchen Ost station.

Trains on Line S8 connect Munchen Ost to the airport - look for the trains terminating at 'Flughafen/Munchen'.

Though If you will be departing Salzburg in odd hours
and want to travel to Munchen Flughafen OR to central Munchen via Munchen Ost station - then target the alternative service of the Meridian trains between Salzburg and Munchen/Munich.