Chicago O'Hare to Ontario CA (ORD → ONT). We are tracking 14 fares on this route.
Cheapest tracked fare $96 · typical price $232 · you save about $136 (59%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Frontier Airlines
2026-11-04
1 stop
$96
Frontier Airlines
2026-09-22
1 stop
$100
Frontier Airlines
2026-09-17
1 stop
$106
Frontier Airlines
2026-09-09
1 stop
$116
Frontier Airlines
2026-09-12
1 stop
$116
Frontier Airlines
2026-09-19
1 stop
$116
Frontier Airlines
2026-09-10
1 stop
$117
Frontier Airlines
2026-09-13
1 stop
$117
Frontier Airlines
2026-09-14
1 stop
$122
Frontier Airlines
2026-09-20
1 stop
$122
Frontier Airlines
2026-09-15
1 stop
$125
Frontier Airlines
2026-09-11
1 stop
$126
Frontier Airlines
2026-09-16
1 stop
$126
United Airlines
2026-09-04
1 stop
$182
Could you save more?
The airport you were going to fly from is often not the cheapest one. Compare every airport in a region against each other, or check whether a multi-day stopover beats the direct fare.
How cheap can flights from Chicago O'Hare to Ontario CA get?
The cheapest fare we have tracked on this route is $96, compared with a typical $232 for a trip of this distance.
Is it cheaper to fly to Ontario CA from a different airport?
Often, yes. Fares out of secondary airports are frequently cheaper than the obvious hub, but they are the ones most likely to be missing from a normal search. Our reverse search compares every airport in a region against each other so the cheaper departure point is not hidden.
Could a stopover make Chicago O'Hare to Ontario CA cheaper?
Sometimes. On thin long-haul routes a two-leg trip with a multi-day stopover can beat the direct fare, and occasionally a direct fare is not sold at all. Our detour search prices those routings against the direct flight.