Flights from Chicago to Ontario, United States

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Did you mean flights from Ontario, California to Chicago?

Chicago to Ontario, California Last modified: Jul 22, 2019 3:22 -04:00

We've scanned 48,195,047,545 round trip itineraries and found the cheapest flights to Ontario, California. American & Frontier frequently offer the best deals to Ontario, California flights, or select your preferred carrier below to see the cheapest days to fly.

American
CHIONT
Sat 9/7
1 stop
ONTCHI
Sun 9/15
1 stop
$332
Frontier
CHIONT
Sat 9/7
1 stop
ONTCHI
Sun 9/15
1 stop
$366
United
CHIONT
Thu 8/15
1 stop
ONTCHI
Mon 8/19
1 stop
$371
Alaska
CHIONT
Sat 9/7
1 stop
ONTCHI
Sun 9/15
1 stop
$472

How Much is a Flight from Chicago to Ontario, California?

We have collected flight cost data from across the web for travel from Chicago to Ontario, California, and have found the average flight price for this trip to be $350.

Where To Buy Cheap Flights from Chicago to Ontario, California?

The best way to find a great deal on airfare is to search multiple sites. When you run a search on FareCompare, we search multiple sites and fare sources all at once so you don't have to - which is why we think FareCompare is the best place to find cheap tickets. Airlines can adjust prices for tickets from Chicago to Ontario, California based on the day and time that you decide to book your flight. We have collected data from all airlines, and have found that Tuesdays, Wednesdays, and Saturdays are often the best days to book flights. If you'd like to learn more, read our article about the best time to buy airline tickets.

How far in advance should I book tickets from Chicago to Ontario, California?

The chart below shows up-to-date information regarding how far in advance to book your flight from Chicago to Ontario, California.

Non Stop versus Connecting
Advanced PurchaseNon StopConnecting
< 7 days $0 $631
7-14 days $0 $491
14-21 days $0 $1,003
21-30 days $0 $586
30-60 days $0 $367
60-90 days $0 $332
90+ days $377 $389

Cheapest Day To Fly from Chicago to Ontario, California

We've examined 57,595,778,181 itinerary searches that we've seen for departures in the next 90 days and found that the cheapest day to fly from Chicago to Ontario, California is Thursday. See the chart below to compare prices for other days of the week.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$441$365$338$265$338$265$436

Compare Flight Prices from Chicago to Ontario, California by Month

Low priced flights are most commonly available by purchasing between one and three months in advance. International or holiday flights may need to be purchased even further in advance. The chart below shows the cheapest flight prices by month for Chicago to Ontario, California flights.

Month Origin Destination Carrier Depart Date Return Date Stops Price
July Chicago Ontario, California Frontier 7/26/19 8/3/19 2 $401
August Chicago Ontario, California United 8/24/19 8/31/19 1 $265
September Chicago Ontario, California United 9/19/19 9/24/19 1 $265
October Chicago Ontario, California United 10/15/19 10/22/19 1 $265
November Chicago Ontario, California United 11/19/19 12/3/19 1 $295
December Chicago Ontario, California American 12/24/19 1/1/20 1 $445
January Chicago Ontario, California American 1/14/20 1/23/20 1 $265
February Chicago Ontario, California American 2/6/20 2/10/20 1 $265

Cheap Last Minute Flights from Chicago to Ontario, California

Looking for cheap last minute flights or a weekend getaway? We've got you covered with weekend flight deals from Chicago to Ontario, California. The chart below shows the best last minute deals and cheap flights this weekend we could find.

Next 30 Days

SunMonTueWedThuFriSat
7 8 9 10 11 12 13
$374
14 15 16 17 18 19 20
$374 $416
21 22 23 24 25 26 27
$416 $460
28 29 30 31 1 2 3
$460 $646
4 5 6 7 8 9 10
$646 $361
11 12 13 14 15 16 17
$361

Connecting Flights vs Direct Flights from Chicago to Ontario, California

Flights between some cities may be significantly cheaper if you choose a multi-stop airline ticket. Although these connecting flights sacrifice some convenience, on average, travelers save 20%-60% when they choose to fly multi-stop versus a direct flight.

The average price for connecting flights from Chicago to Ontario, California is $298.

The average price for direct flights from Chicago to Ontario, California is $377.

One Way Flights vs Round Trip Flights from Chicago to Ontario, California

We have found that there is often no price difference between buying a round trip flight versus a one way flight. Increased flexibility is the main benefit when it comes to buying a one way flight from Chicago to Ontario, California. However, booking a round trip flight can be a simpler process. You can compare round trip and one way flights by using our flight comparison.

The average price for one way flights from Chicago to Ontario, California is $257.

The average price for round trip flights from Chicago to Ontario, California is $298.

Chicago to Ontario, California Flight Questions

Below are some common questions that asked about this flight route:

Question: What are the most popular connecting cities when flying from Chicago to Ontario, California?
Answer: San Francisco, CA

Airlines in Chicago flying to Ontario, California Last modified: Jul 22, 2019 3:22 -04:00Number of routes searched: 155Number of itineraries searched: 73,366

Wondering which airlines fly out of Chicago to Ontario, California? We've gathered the average price of Chicago airlines with flights to Ontario, California. Different airlines offer different levels of comfort and service, so consider convenience when choosing your airline.

Below is the full flight schedule summary showing which days of the week individual carriers offer flights for the next 30 days.

Chicago to Ontario, California
Airline Connections Mon Tue Wed Thu Fri Sat Sun
Alaska -
American DFW
American PHX
American SEA
Alaska PDX
Alaska SEA
Alaska SFO
JetBlue JFK
Major Airlines ATL
Major Airlines SLC
Frontier DEN
Frontier MCO
United DEN
United IAH
United SFO

Chicago to Ontario, California Airports

These are the major commercial airports we're currently monitoring in Chicago and Ontario, California. If your route includes a city with multiple airports, you may be able to find substantial savings by choosing an alternate airport.

Farecompare Research Tools

FareCompare's Flight Schedule Search Tool helps you find information about airline schedule filings, including flight numbers, depart times, and travel distance.

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Cheap Flights from Chicago to Ontario, California