Are there nonstop flights from Rome (FCO) to Ronchi dei Legionari/Trieste (TRS)?

Yes. ITA Airways fly this route. Flight time is about 1h 2m.

What is the fastest connection from Rome (FCO) to Ronchi dei Legionari/Trieste (TRS)?

via Naples ≈ 1h 53m, via Genova ≈ 1h 56m, via Milan ≈ 1h 56m (estimated flying time, excluding layovers).

Rome–Fiumicino Leonardo da Vinci International Airport (FCO) to Trieste Airport (TRS)・458 km

Nonstop flights available (1 airline). Flight time about 1h 2m. Nonstop return flights also operate.

12 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.