by Train
Trieste is connected to the most important Italian towns as well as with several european Capitals. The Stazione Centrale Rail Station is located near the centre of the town.
For details refer to Trenitalia site.
http://www.trenitalia.com/
by Airplane
The Trieste International Airport known as Ronchi dei Legionari International Airport is located 35 km (22 miles) far from Trieste and it is connected to the town via train and bus (Line n. 51 Bus Terminal: Piazza Libertà, adjacent to the rail Station).
Direct connections from/to Rome FCO (Alitalia) and Münich MUC (Lufthansa) are usually available.
https://triesteairport.it (ENG)
https://www.trenitalia.com/en.html
Bus timetable
The Venice (Marco Polo) international airport is 150 km (94 miles) far from Trieste. Bus lines and shuttles connect the airport to the Venezia-Mestre Rail Station. Direct trains connect Venezia-Mestre to Trieste.
www.veneziaairport.it/en/
The Treviso international airport is located 145 km (90 miles) far from Trieste. Buses and shuttles are available to reach Treviso or Venezia-Mestre Rail stations.
www.trevisoairport.it/en/
The Ljubljana (Slovenia) international airport can also be considered as it is located 114 km (71 miles) far from Trieste.
https://www.fraport-slovenija.si/en/Main
It is possible to book the Science-Bus at the link: www.science-bus.com/.
Using the code "P1554" a preferencial rate is available.
by Car
Trieste is joined by the A4 highway to the Italian and European highways network.
Take the A4 motorway from Venice-Mestre or the A23 motorway from Tarvisio-Austria. Use the Lisert exit. Follow signs for Sistiana-Strada Costiera, then take route SS 14, a panoramic road leading directly to the city centre (km. 18).
Alternatively, take the Prosecco exit (immediately after the tunnel) and continue towards Opicina. From the crossroads turn right and continue down towards Trieste.