
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $165 (Frontier) |
One-way from | $62 (Trip.com) |
Popular in | September |
Cheapest in | April |
Average price | $518 |
Good round-trip deal | $550 or less |
Good one-way deal | $266 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Fri 1/23
6:06 pm-3:08 pm
1 stop23h 02m
Ontario
Mon 1/26
6:00 am-11:50 pm
1 stop15h 50m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Wed 1/28
8:00 am-8:36 pm
1 stop14h 36m
Ontario
Thu 1/29
6:00 am-11:50 pm
1 stop15h 50m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Tue 1/27
6:06 pm-8:36 pm
1 stop28h 30m
Ontario
Thu 1/29
6:00 am-11:50 pm
1 stop15h 50m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Wed 2/25
7:00 am-10:44 pm
1 stop17h 44m
Ontario
Mon 3/2
7:37 pm-4:33 pm
2 stops18h 56m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Fri 2/6
6:06 pm-8:36 pm
1 stop28h 30m
Ontario
Fri 2/13
4:02 pm-11:56 pm
1 stop29h 54m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Wed 2/4
6:06 pm-3:08 pm
1 stop23h 02m
Ontario
Mon 2/9
4:03 pm-2:38 pm
1 stop20h 35m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sun 2/8
3:35 pm-10:59 am
1 stop21h 24m
Ontario
Sun 2/15
6:14 am-11:56 pm
1 stop15h 42m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Fri 1/23
3:35 pm-11:56 pm
1 stop10h 21m
Ontario
Sun 1/25
6:00 am-5:10 pm
1 stop9h 10m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 1/17
5:20 pm-9:48 pm
1 stop6h 28m
Ontario
Sat 1/24
12:41 pm-11:56 pm
1 stop9h 15m
ChicagoOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sun 1/11
1:50 pm-10:51 pm
2 stops11h 01m
Ontario
Sun 1/18
12:41 pm-11:59 pm
1 stop9h 18m
| 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 9 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 January is currently the most expensive (average of $124). 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 morning could potentially save you up to 39% 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
Overall
Entertainment
Boarding
Crew
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Overall
Entertainment
Boarding
Crew
Food
Reviews
Walter,Aug 2025
OAK - SAN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$125 | Average$219 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$231 | Average$459 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$237 | Average$435 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$246 | Average$420 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$256 | Average$256 | FlexibilityNo cancel fee | On-timeN/A |