Cheap Flight Tickets from Chicago (ORD) to Ontario (ONT), Starting at $437

Good to Know: Cheapest and Fastest ORD - ONT Flights

Useful information for finding best airline tickets from Chicago O'Hare International to Ontario International on your next trip.

Cheapest Round Trip Flight

$670

F9 Frontier Airlines • 1 stop • 20h 59m

Jul 05 – Jul 12

The cheapest round trip flight from Chicago to Ontario (ORD-ONT-ORD) is currently $670

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Cheapest One way Flight

$437

F9 Frontier Airlines • 1 stop • 15h 48m

Jun 28

The cheapest one way flight from Chicago to Ontario (ORD-ONT) is currently $437

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Cheapest Direct Flight

$509

UA United Airlines • nonstop • 7h 13m

Jul 20

The cheapest nonstop flight from Chicago to Ontario (ORD-ONT) is currently $509

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Fastest Flight

7h 13m

The fastest nonstop flight from Chicago to Ontario (ORD-ONT) takes 7h 13m

Top Airlines Flying from Chicago to Ontario

Alaska Airlines -AS

Alaska Airlines

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

American Airlines, AA

American Airlines

Latest Flight Deals from Chicago (ORD) to Ontario (ONT)

Compare and book low fare round-trip air tickets from Chicago to Ontario. Ideal for travelers with confirmed return itineraries.

Jul 05 - Jul 12, Economy
F9
Chicago → Ontario
20h 59m
9:38 PM - 8:37 AM • 1 stop
F9
Chicago → Ontario
20h 52m
6:00 AM - 8:52 PM • 1 stop
$670
Frontier Airlines
Jul 05 - Jul 12, Economy
F9
Chicago → Ontario
23h 27m
9:57 PM - 10:04 AM • 1 stop
F9
Chicago → Ontario
20h 52m
6:00 AM - 8:52 PM • 1 stop
$670
Frontier Airlines
Jul 05 - Jul 12, Economy
F9
Chicago → Ontario
17h 19m
7:15 AM - 3:54 PM • 1 stop
F9
Chicago → Ontario
21h 57m
9:32 AM - 12:49 AM • 1 stop
$804
Frontier Airlines
Jul 05 - Jul 12, Economy
AS
Chicago → Ontario
17h 8m
8:02 AM - 4:30 PM • 1 stop
AS
Chicago → Ontario
15h 11m
7:09 PM - 6:20 AM • 1 stop
$845
Alaska Airlines
Jul 05 - Jul 12, Economy
AS
Chicago → Ontario
20h 30m
6:00 AM - 4:30 PM • 1 stop
AS
Chicago → Ontario
15h 11m
7:09 PM - 6:20 AM • 1 stop
$883
Alaska Airlines
Jul 05 - Jul 12, Economy
AS
Chicago → Ontario
20h 10m
1:01 PM - 11:11 PM • 1 stop
AS
Chicago → Ontario
15h 11m
7:09 PM - 6:20 AM • 1 stop
$925
Alaska Airlines

Fly from Chicago to Ontario with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Chicago to Ontario? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Chicago to Ontario Flights

What are the airports in Chicago?
MDW,ORD
What’s the most popular airline flying from ORD to ONT?
The most popular airline flying from Chicago to Ontario are
Can I fly from ORD to ONT non-stop?
Yes, you can fly ORD to ONT non-stop on
Which airlines fly nonstop between Chicago and Ontario?
The non-stop flights between Chicago and Ontario are .
What’s the earliest departure time from ORD to ONT Airport?
The earliest flight leaves ORD at 6:00 am and lands in ONT - Ontario International
What are the airports in Ontario?
ONT
Can I make changes to my Chicago to Ontario flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from ORD to ONT?
Read the fare rules of the Chicago to Ontario air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Chicago and Ontario?
operate flights between Chicago and Ontario
How long does a flight from Chicago to Ontario take?
It takes approximately 4 hour to fly non-stop from ORD to ONT, which is 1699.87 miles by air.
Which airlines provide the cheapest flights from Chicago (ORD) to Ontario (ONT) ?
In the past couple of days, the cheapest tickets to ONT from ORD were found on F9 : USD 491
Do I need a passport to fly between ORD and ONT?
No
What’s the latest departure time from ORD to ONT ?
The last flight leaves ORD at 9:57 pm

Chicago (ORD) to Ontario (ONT): Airport Information

Origin Airport Chicago O'Hare International , Chicago, US
Destination Airport Ontario International , Ontario, US
Distance 1700 miles

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