For business travelers, ONT offers a smooth security process, often quicker than LAX, making it ideal for weekday commutes.
Most accurate provider | FlightHub 3 stars |
---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $161 (Kiwi.com) |
One-way from | $57 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $349 |
Good round-trip deal | $362 or less |
Good one-way deal | $188 or less |
Fly from
Fly to
Route
Depart
Return
Price
OntarioChicago
ONT - ORD
ONTORD
Ontario
Wed 12/3
12:40 pm-11:59 pm
1 stop9h 19m
Chicago O'Hare Intl
Fri 12/12
2:14 pm-10:47 pm
1 stop10h 33m
OntarioChicago
ONT - ORD
ONTORD
Ontario
Thu 12/4
12:40 pm-11:59 pm
1 stop9h 19m
Chicago O'Hare Intl
Mon 12/8
7:20 am-5:07 pm
2 stops11h 47m
OntarioChicago
ONT - ORD
ONTORD
Ontario
Wed 2/25
6:45 am-11:44 pm
1 stop14h 59m
Chicago O'Hare Intl
Sat 2/28
7:30 am-3:20 pm
1 stop9h 50m
OntarioChicago
ONT - ORD
ONTORD
Ontario
Wed 2/25
6:45 am-11:44 pm
1 stop14h 59m
Chicago O'Hare Intl
Tue 3/3
9:30 am-10:38 pm
2 stops15h 08m
OntarioChicago
ONT - ORD
ONTORD
Ontario
Wed 1/7
11:53 am-11:55 pm
1 stop10h 02m
Chicago O'Hare Intl
Tue 1/20
8:00 am-3:08 pm
1 stop9h 08m
OntarioChicago
ONT - ORD
ONTORD
Ontario
Wed 11/12
6:03 pm-5:01 am
1 stop8h 58m
Chicago O'Hare Intl
Mon 11/17
3:25 pm-11:32 pm
1 stop10h 07m
OntarioChicago
ONT - RFD
ONTRFD
Ontario
Mon 11/24
5:06 pm-11:17 am
1 stop16h 11m
Chicago Greater Rockford
Sat 11/29
12:27 pm-9:06 pm
1 stop10h 39m
OntarioChicago
ONT - ORD
ONTORD
Ontario
Fri 1/30
6:00 am-11:55 pm
1 stop15h 55m
Chicago O'Hare Intl
Mon 2/2
8:00 am-3:08 pm
1 stop9h 08m
OntarioChicago
ONT - ORD
ONTORD
Ontario
Thu 2/26
6:55 pm-5:04 am
1 stop8h 09m
Chicago O'Hare Intl
Sat 2/28
10:00 am-6:17 pm
1 stop10h 17m
OntarioChicago
ONT - RFD
ONTRFD
Ontario
Wed 10/29
8:00 am-11:49 am
1 stop25h 49m
Chicago Greater Rockford
Sun 11/2
12:54 pm-10:05 pm
1 stop11h 11m
Provider | Price Accuracy | Trust Score* |
---|---|---|
Price Accuracy2 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy2 stars | Trust Score*3 stars |
The best time to book flights from Ontario to Chicago is 88 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, March is the cheapest month in which you can book a flight from Ontario to Chicago (average of $77). Flying from Ontario to Chicago in December is currently the most expensive (average of $156). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Unlike in the morning, when flights are generally more expensive, you can save up to 49% on flights from Ontario to Chicago by exploring options for tickets in the afternoon.
Travelers seeking maximum savings on their Ontario to Chicago flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from ONT to CHI are scheduled on a Monday (2 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).
Food
Crew
Boarding
Entertainment
Comfort
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Crew
Boarding
Entertainment
Comfort
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Crew
Boarding
Entertainment
Comfort
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Crew
Boarding
Entertainment
Comfort
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Crew
Boarding
Entertainment
Comfort
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Crew
Boarding
Entertainment
Comfort
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$110 | Average$213 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$227 | Average$394 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$237 | Average$434 | FlexibilityNo cancel fee | On-time63% | |
Cheapest$246 | Average$510 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$256 | Average$414 | FlexibilityNo cancel fee | On-timeN/A |