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  2. United States
  3. Ontario, CA
  4. Chicago - Ontario, CA

Cheap Flights from Chicago (CHI) to Ontario, CA (ONT)

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Discover the cheapest flights from Chicago to Ontario, CA
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Sun, May 11 - Tue, May 13
Frontier Airlines
Frontier Airlines1 stop
CHI - ONT
Spirit Airlines
Spirit AirlinesDirect
ONT - CHI
138$
132$
Prime price per passenger
Fri, May 23 - Wed, May 28
Frontier Airlines
Frontier Airlines1 stop
CHI - ONT
Frontier Airlines
Frontier AirlinesDirect
ONT - CHI
158$
155$
Prime price per passenger
Sun, May 4 - Mon, May 5
Frontier Airlines
Frontier Airlines1 stop
CHI - ONT
Spirit Airlines
Spirit AirlinesDirect
ONT - CHI
174$
166$
Prime price per passenger
Sat, Jun 21 - Sat, Jun 28
American Airlines
American Airlines1 stop
CHI - ONT
American Airlines
American Airlines1 stop
ONT - CHI
246$
242$
Prime price per passenger
Sat, Jun 7 - Sat, Jun 14
American Airlines
American Airlines1 stop
CHI - ONT
American Airlines
American Airlines1 stop
ONT - CHI
247$
242$
Prime price per passenger
Sat, Jun 28 - Fri, Jul 4
American Airlines
American Airlines1 stop
CHI - ONT
American Airlines
American Airlines1 stop
ONT - CHI
282$
277$
Prime price per passenger
Sun, May 4
Frontier Airlines
Frontier Airlines1 stop
CHI - ONT
96$
94$
Prime price per passenger
Sat, May 10
Frontier Airlines
Frontier Airlines1 stop
CHI - ONT
99$
96$
Prime price per passenger
Thu, May 22
Frontier Airlines
Frontier Airlines1 stop
CHI - ONT
122$
119$
Prime price per passenger
Tue, Jun 10
American Airlines
American Airlines1 stop
CHI - ONT
123$
121$
Prime price per passenger
Tue, Jun 24
American Airlines
American Airlines1 stop
CHI - ONT
123$
121$
Prime price per passenger
Fri, Jul 4
American Airlines
American Airlines1 stop
CHI - ONT
123$
121$
Prime price per passenger
Prices shown below were available within the past 3 days for the period specified and should not be considered the final price offered. Please note that availability and prices are subject to change.

Cheapest time to fly from Chicago to Ontario, CA

Flexible with dates? We find the best price for the week of the day you select *Prices may vary after you search.
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week: May 5 - May 11
Flights from just $95
$105
$106
$95
$125
$139
$140
$166
$239
$118
$163
$189
$179
AprilMayJuneJuly
Flying Time5 h and 12 mWhen flying from Chicago to Ontario, CA, this can take around 5 h and 12 m in flying time, however this flight duration can vary due to other factors
Cheapest flight$93The best price for flights from Chicago to Ontario, CA offered by eDreams, which have been found by our customers in the last 3 days
Departure AirportO'hare International AirportO'hare International Airport is where you'll take off when flying from Chicago to Ontario, CA
Arrival AirportOntario InternationalYou'll land at Ontario International when flying from Chicago to Ontario, CA
Peak seasonAugustAugust is the busiest time to fly from Chicago to Ontario, CA according to search data results from our customers
Best time to bookAugustAugust is one of the most frequent times to fly to Ontario, CA from Chicago according to real data from our customers

Route information

Distance: 1706 miles
Chicago airports
O'hare International Airport (ORD)How far from city center: 14 miles
Midway Airport (MDW)How far from city center: 4 miles
Ontario, CA airports
Ontario International (ONT)How far from city center: 2 miles

Are you searching for flights from Chicago to Ontario, CA?

Are you planning to travel to Ontario, CA for vacations, business or family visits? eDreams offers you the cheapest flights and best deals departing from Chicago. With our fast search engine you will get a large selection of airfares from standard and low cost airlines worldwide and easily book your tickets for this route. If you are flexible we help you identify the cheapest day to fly to Ontario, CA and if you need to leave soon you can check our most convenient last minute fares. Read all the useful information about your next destination and proceed to the reservation, indicating your flight dates and completing your travel booking with hotels and car rental!

Frequently asked questions about flights from Chicago to Ontario, CA

What are the benefits of booking flexible flight tickets?
Using the flexible flight ticket, you're guaranteed a refund or a rebooking option (without fees) in case of flight cancellations when travelling to United States. At eDreams have you covered!
For flights from Chicago to Ontario, CA, how can I find the cheapest price?
The cheapest price for a flight from Chicago to Ontario, CA is $94. At eDreams we use different machine learned based methodologies to find our costumers the best option available, considering airline combinations, stopovers and direct flights as well as different criteria for inbound and outbound journeys.
When booking, when is the best time to get the best prices for flights from Chicago to Ontario, CA?
The most popular months to book a trip from Chicago to Ontario, CA are August, January and July, based on the searches of our customers.
When is the best time to travel from Chicago to Ontario, CA?
The best time of the year to visit Ontario, CA depends on lots of personal preferences, especially the price. Regarding popularity, August is the best month to fly to Ontario, CA from Chicago in terms of searches from our customers, followed by February and July. If you prefer to avoid the busy season and get away from the crowds November, October and April are the months with fewer searches for Chicago - Ontario, CA.
How long does the flight from Chicago to Ontario, CA take?
Flight length from Chicago to Ontario, CA is around 05:12 hours on average, at an average distance of 2,973 km, for flights for the route (which may have 1 or more stops in other cities in between).
Which airports have flights between Chicago and Ontario, CA?

The main route from Chicago to Ontario, CA is: Midway Airport (MDW) to Ontario International (ONT). The following airlines fly this route:

Frontier Airlines.

Alternatively, you can find Chicago - Ontario, CA flights between O'hare International Airport (ORD) to Ontario International (ONT) with the following airline(s) flying the route: Frontier Airlines.

American Airlines.

Which airlines fly from Chicago to Ontario, CA?

The airlines that fly non-stop from Chicago to Ontario, CA are:

  • American Airlines.
  • United Airlines.
  • Delta Air Lines.

American Airlines, stopping at Dallas during at least 82 minutes.

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