FFL Helper

FFL Helper / Denver / Ontario

DEN → ONT

Denver to Ontario

Compare one-way fares for flights from Denver to Ontario.

Lowest fare $27
Distance 801 mi
Flight time 2h 18m
Airports DEN–ONT
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By month: September 2026 from $27

Price calendar

August 2026

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September 2026

From $27 · up to $167

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1 $167 2 $97 3 $97 4 $97 5 $97 6 $97 7 $97 8 $97 9 $27 10 $29 11 $29 12 $29 13 $29 14 $29 15 $31
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Upcoming dates

Ontario ONT

$27

Sep 09, 10:29pm · 2h 18m · 0 stops

DEN → ONT · Frontier Airlines

Tickets

Ontario ONT

$31

Sep 15, 10:29pm · 2h 18m · 0 stops

DEN → ONT · Frontier Airlines

Tickets

About this route

This calendar shows dated one-way fares from Denver to Ontario. Use it to see which days are cheaper before you search tickets.

Flight time and airport codes on this page are for the sample itinerary we have on file. Always confirm the live routing when you book Denver to Ontario.