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Flights from Ontario International Airport to Illinois

Flight deals from Ontario International Airport to Illinois

Looking for cheap tickets from Ontario International Airport to Illinois, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.
Chicago.ج.م.‏ 11,622 per passenger.Departing Thu, 7 Aug, returning Mon, 11 Aug.Return flight with Frontier Airlines and Spirit Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Thu, 7 Aug, arriving in Chicago O'Hare International.Inbound indirect flight with Spirit Airlines, departs from Chicago O'Hare International on Mon, 11 Aug, arriving in Ontario International.Price includes taxes and charges.From ج.م.‏ 11,622, select.
Chicago.ج.م.‏ 16,515 per passenger.Departing Mon, 8 Sep, returning Tue, 9 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Mon, 8 Sep, arriving in Chicago Midway.Inbound direct flight with Southwest Airlines departs from Chicago Midway on Tue, 9 Sep, arriving in Ontario International.Price includes taxes and charges.From ج.م.‏ 16,515, select.
Peoria.ج.م.‏ 16,840 per passenger.Departing Tue, 29 Jul, returning Sat, 2 Aug.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Tue, 29 Jul, arriving in Greater Peoria.Inbound indirect flight with United, departs from Greater Peoria on Sat, 2 Aug, arriving in Ontario International.Price includes taxes and charges.From ج.م.‏ 16,840, select.
Moline.ج.م.‏ 28,151 per passenger.Departing Mon, 21 Jul, returning Thu, 24 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Mon, 21 Jul, arriving in Moline.Inbound indirect flight with Delta, departs from Moline on Thu, 24 Jul, arriving in Ontario International.Price includes taxes and charges.From ج.م.‏ 28,151, select.
Bloomington.ج.م.‏ 31,954 per passenger.Departing Wed, 30 Jul, returning Sun, 3 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Wed, 30 Jul, arriving in Central Illinois Regional.Inbound indirect flight with Delta, departs from Central Illinois Regional on Sun, 3 Aug, arriving in Ontario International.Price includes taxes and charges.From ج.م.‏ 31,954, select.

Flying from Ontario International Airport to Illinois

Arm yourself with these facts on the fly.
Cheapest flight foundج.م.‏ 5,733, Chicago
Cheapest month to flyAugust
Average flight time3 hrs, 56 mins
Average flights per week36
Most popular airlineSouthwest Airlines

Frequently asked questions

Yes - direct flights currently operate from Ontario International Airport to Chicago Midway Airport in Illinois.
We looked at all of the upcoming return flights from Ontario International Airport to Illinois we could find over the next 12 months. It looks like ج.م.‏ 11,622 is the best price. This is good, compared to the average Illinois ticket price of ج.م.‏ 18,815.
The cheapest month to fly from Ontario International Airport to Chicago O'Hare International Airport is currently August.
The cheapest month to fly from Ontario International Airport to Moline Airport is currently July.
The cheapest month to fly from Ontario International Airport to Chicago Midway Airport is currently September.
And the cheapest month to fly from Ontario International Airport to Central Illinois Regional Airport is usually July.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ontario International Airport to Illinois on Thursday, 7 August 2025.
If you're flying from Ontario International, the cheapest city in Illinois to fly into is Chicago. The cheapest airport serving Chicago at the moment is Chicago O'Hare International.
The average flight time between Ontario International Airport and Illinois is 3 hours and 55 minutes.