By air
Flights from Chicago to Ontario
Fly from Chicago to Ontario (ONT) — then arrive and explore.
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Flight details and fares
Chicago to Ontario at a glance
- Arrival airport
- ONT
- Routing
- 2 stops
- Recent fare from
- £122
- Fare found
- 2026-09-10
£122 is the cheapest recent one-way fare our flight-data partner found for Chicago to Ontario; live prices move daily by date and demand. Check current Chicago to Ontario fares and pick your dates:
Are there direct flights from Chicago to Ontario?
Our latest harvest found the best Chicago to Ontario fare with 2 stops; a non-stop fare was not returned at that check. Direct routes can appear seasonally, so check the live search above for your dates.
The fare is the cheapest our flight-data partner (Travelpayouts) found for Chicago to Ontario, found around 2026-09-10: a recent SIGNAL, NOT a live or guaranteed quote, always check current fares before booking. The direct/indirect status reflects the routing found at that check and can vary by season and date. Airport codes from OurAirports. How Head Your Way compiles its data.