Direct flights from Ontario to Denver ONT → DEN

Frontier Airlines, Southwest Airlines and United Airlines operate nonstop flights from Ontario (ONT) to Denver (DEN). The nonstop flight takes around ~1h 39m, covering 818 miles (1,316 km). Updated 28 June 2026.

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More nonstops from Ontario

ONT → OAK Oakland ONT → SEA Seattle 3 airlines ONT → DFW Dallas-Fort Worth 2 airlines ONT → HNL Honolulu, Oahu 2 airlines ONT → IAH Houston 2 airlines ONT → LAS Las Vegas 2 airlines ONT → PHX Phoenix 2 airlines ONT → SFO San Francisco 2 airlines

Frequently asked questions

Is there a direct flight from Ontario to Denver?

Yes, Frontier Airlines, Southwest Airlines and 1 more airline operate nonstop flights from Ontario (ONT) to Denver (DEN).

Which airlines fly direct from Ontario to Denver?

Frontier Airlines, Southwest Airlines, United Airlines operate nonstop flights from Ontario to Denver.

How long is the flight from Ontario to Denver?

The nonstop flight from Ontario to Denver takes ~1h 39m (approximately 1316 km).

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ONT All direct flights from Ontario 🗓 Find cheapest round-trip dates → DEN All direct flights from Denver DEN → ONT Return: Denver to Ontario
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