🇺🇸 Cheap flights from Rome to Ontario (United States) for €518 round-trip

Flights from Rome to Ontario, United States from €518 round-trip by Delta Air Lines! Find the cheapest flights from Rome to Ontario and book your ticket at the best price! Tickets to United States will cost from €518 both ways.

Ontario sits in California's Inland Empire, an easygoing base east of Los Angeles rather than a destination in its own right. It's a practical launchpad: the San Gabriel Mountains rise to the north, the wineries and citrus groves of Cucamonga are a short drive away, and Palm Springs and the desert lie within reach. November brings mild, dry days and cool evenings, ideal for exploring without summer's inland heat.