Cheap Flights from Ontario, CA to Chicago, IL from $103
On Cheapflightsplus.com you will find 3 direct and 189 connecting flights from Ontario to Chicago. You can compare airfare deals from 4 airlines and multiple travel sites from $103, book and save on cheap plane tickets and last minute offers. Also check out ONT-CHI flight schedule to find best flight time, convenient departure and arrival airports.
Flight Information
Below we will explain in detail what the flights cost on the destination from Ontario to Chicago depends on and how to choose the most interesting flight option for you.
Distance between Ontario and Chicago is 2751 miles. Time difference between the cities is 2h. Airplanes depart 00:59 to 20:09 from 2 Ontario airports and arrive 00:59 to 20:09 to 7 Chicago airports. Average flight time is 4h 3m.
- The fastest flight 4h 2m
- Average flight time 4h 3m
- The earliest flight 00:59
- The latest flight 20:09
- Distance 1710 ml
Best Flights from Ontario to Chicago Today
| Price | Departure | Arrival | Flight Duration | Airline | Flight |
|---|---|---|---|---|---|
| from $158 | 07:00 Ontario Ontario Int. | 13:02 Chicago O'Hare International | 4h 2m | United Airlines | UA356 |
| from $417 | 07:00 Ontario Ontario Int. | 13:03 Chicago O'Hare International | 4h 3m | United Airlines | UA2649 |
| from $103 | 12:48 Ontario Ontario Int. | 22:18 Chicago Midway | 7h 30m layover 1h 27m - Houston | Frontier Airlines | F93132 F93282 |
| from $118 | 13:31 Ontario Ontario Int. | 23:59 Chicago O'Hare International | 8h 28m layover 1h 36m - Seattle | Hawaiian Airlines | HA6289 HA6819 |
| from $166 | 07:10 Ontario Ontario Int. | 22:04 Chicago O'Hare International | 12h 54m layover 3h 57m - Portland 1h 33m - Seattle | Hawaiian Airlines | HA6286 HA6397 HA6821 |
| from $180 | 07:10 Ontario Ontario Int. | 22:04 Chicago O'Hare International | 12h 54m layover 3h 57m - Portland 1h 33m - Seattle | Alaska Airlines | AS1058 AS1016 AS941 |
The cheapest months to travel to Chicago are july (from 103 $), october (from 118 $), september (from 119 $).
The most expensive months are february (from 329 $), december (from 266 $), august (from 133 $).
What is the lowest airfare Ontario to Chicago?
The cheapest plane ticket found by our users is $103. This airfare is for economy class on one-way F93132 flight by Frontier Airlines for July 4, 2025 which leaves Ontario Int. in Ontario at 12:48 am and arrives at Chicago Midway at 22:18.
Flight Schedule Ontario (California) to Chicago (Illinois)
from$103
from$108
from$119
from$108
from$126
from$158
from$163
from$417
from$119
from$127
from$103
from$118
from$127
from$133
from$108
Popular Airlines on the Route
The flight Ontario — Chicago is served by 4 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 45 departures per week at the price of from $ 127 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 7004.
Direct flights
There are 3 nonstop flights on the route. The fastest direct flight is UA356 by United Airlines takes 4h 2m and the cheapest is F93132 by Frontier Airlines for $158.
- UA - United Airlinesfrom $158Find
Connecting Flights
There are 189 flights with layovers on the route. The fastest connecting flight is UA2446 by United Airlines takes 6h 2m and the cheapest is F93132 by Frontier Airlines for $103.
- AS - Alaska Airlinesfrom $127Find
- F9 - Frontier Airlinesfrom $103Find
- HA - Hawaiian Airlinesfrom $118Find
- UA - United Airlinesfrom $167Find
Airports
You can fly from Ontario to Chicago from 2 airports (Ontario Int., International Heliport).
Ontario airports
- Ontario Int.-ONTfrom $103Find
- International Heliport-JIOFind
Chicago airports
- O'Hare International-ORDFind
- Midway-MDWFind
- Dupage County-DPAFind
- Chicago FSS-CHIFind
- Merrill C Meigs (closed)-CGXFind
- Pal-Waukee-PWKFind
- Chicago NAS-NOHFind
Airplanes
There are flights to Chicago from Ontario by 4 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.
Top Domestic Destinations from Ontario
You may also consider searching for discounted plane tickets to some other popular places from Ontario within United States.
- from $56Find
- from $65Find
- from $67Find
- from $62Find
- from $80Find
- from $63Find
- from $65Find
- from $70Find
- from $78Find
- from $62Find
Top International Destinations from Ontario
Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.
- from $62Find
- from $61Find
- from $70Find
- from $74Find
How to book a plane ticket yourself?
- Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
- Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
- Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
- Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
- That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.
To find a plane ticket, please select dates.