
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $130 (Frontier) |
One-way from | $63 (Trip.com) |
Popular in | September |
Cheapest in | April |
Average price | $407 |
Good round-trip deal | $451 or less |
Good one-way deal | $170 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Fri 12/12
12:59 pm-9:17 pm
1 stop10h 18m
Ontario
Mon 12/15
3:20 pm-12:12 am
1 stop6h 52m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Wed 11/19
6:05 pm-11:11 am
1 stop19h 06m
Ontario
Fri 11/21
7:48 pm-12:10 am
1 stop26h 22m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Thu 12/4
9:21 am-6:35 pm
1 stop11h 14m
Ontario
Thu 12/11
12:04 pm-12:12 am
1 stop10h 08m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Fri 12/12
12:59 pm-9:17 pm
1 stop10h 18m
Ontario
Sun 12/14
4:01 pm-12:12 am
1 stop6h 11m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Wed 11/19
6:05 pm-11:11 am
1 stop19h 06m
Ontario
Wed 11/26
7:06 pm-12:10 am
1 stop27h 04m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 11/22
7:00 am-6:13 pm
1 stop13h 13m
Ontario
Tue 11/25
3:21 pm-1:13 pm
1 stop19h 52m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Tue 12/9
5:40 pm-11:13 am
1 stop19h 33m
Ontario
Mon 12/15
6:40 am-11:59 pm
1 stop15h 19m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 12/13
2:10 pm-10:47 pm
1 stop10h 37m
Ontario
Tue 12/16
12:40 pm-11:59 pm
1 stop9h 19m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 12/6
7:50 am-5:08 pm
1 stop11h 18m
Ontario
Mon 12/15
12:40 pm-11:59 pm
1 stop9h 19m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Wed 12/10
8:00 am-6:33 pm
1 stop12h 33m
Ontario
Wed 12/17
7:10 am-1:16 pm
1 stop28h 06m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
The price you pay for your flight from Chicago O'Hare Intl Airport to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, September is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Ontario (average of $80). Flying from Chicago O'Hare Intl Airport to Ontario in December is currently the most expensive (average of $145). 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.
One of the essential ways to save on airfare from Chicago O'Hare Intl Airport to Ontario is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 41% on airfare.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Ontario flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Comfort
Boarding
Food
Entertainment
Crew
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Boarding
Food
Entertainment
Crew
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Boarding
Food
Entertainment
Crew
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Boarding
Food
Entertainment
Crew
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Boarding
Food
Entertainment
Crew
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Boarding
Food
Entertainment
Crew
Overall
Reviews
Walter,Aug 2025
OAK - SAN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$125 | Average$222 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$231 | Average$441 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$237 | Average$434 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$256 | Average$280 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$282 | Average$508 | FlexibilityNo cancel fee | On-time63% |