FFL Helper

FFL Helper / Ontario / Chicago

ONT → CHI

Ontario to Chicago

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

Lowest fare $109
Distance 1,712 mi
Flight time 8h 38m
Airports ONT–ORD
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By month: August 2026 from $110 · September 2026 from $109

Price calendar

August 2026

From $110 · up to $115

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September 2026

From $109

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Upcoming dates

Chicago CHI

$109

Sep 01, 9:37am · 8h 38m · 1 stop

ONT → ORD · Frontier Airlines

Tickets

Chicago CHI

$110

Aug 30, 8:17am · 10h 14m · 1 stop

ONT → MDW · Frontier Airlines

Tickets

Chicago CHI

$115

Aug 29, 7:56pm · 15h 40m · 1 stop

ONT → ORD · Frontier Airlines

Tickets

About this route

This calendar shows dated one-way fares from Ontario to Chicago. 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 Ontario to Chicago.