Detroit to Ontario CA (DTW → ONT). We are tracking 5 fares on this route.
Cheapest tracked fare $108 · typical price $252 · you save about $144 (57%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
—
2026-10-14
1 stop
$108
—
2026-10-07
1 stop
$132
—
2026-12-14
1 stop
$162
Frontier Airlines
2026-11-23
1 stop
$163
Frontier Airlines
2026-09-25
2 stops
$186
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 Detroit to Ontario CA get?
The cheapest fare we have tracked on this route is $108, compared with a typical $252 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 Detroit 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.