
Most accurate provider | Justfly.com 3 stars |
|---|---|
Most trusted provider | Justfly.com 3 stars |
Round-trip from | $130 (Expedia) |
One-way from | $63 (Trip.com) |
Popular in | November |
Cheapest in | September |
Average price | $338 |
Good round-trip deal | $336 or less |
Good one-way deal | $110 or less |
Fly from
Fly to
Route
Depart
Return
Price
OntarioSt. Louis
ONT - STL
ONTSTL
Ontario
sáb. 12/13
6:15 am-12:12 pm
1 stop27h 57m
Lambert-St Louis
lun. 12/15
1:16 pm-9:17 pm
1 stop10h 01m
OntarioSt. Louis
ONT - STL
ONTSTL
Ontario
mar. 1/20
7:00 am-10:02 am
1 stop25h 02m
Lambert-St Louis
vie. 1/23
7:43 pm-11:59 pm
1 stop6h 16m
OntarioSt. Louis
ONT - STL
ONTSTL
Ontario
mié. 11/26
12:58 am-6:58 pm
1 stop16h 00m
Lambert-St Louis
dom. 11/30
9:54 pm-9:06 pm
1 stop25h 12m
OntarioSt. Louis
ONT - STL
ONTSTL
Ontario
lun. 11/24
6:30 am-9:09 pm
1 stop12h 39m
Lambert-St Louis
lun. 12/1
9:54 pm-9:17 pm
1 stop25h 23m
OntarioSt. Louis
ONT - STL
ONTSTL
Ontario
mié. 11/26
6:30 am-9:09 pm
1 stop12h 39m
Lambert-St Louis
lun. 12/1
9:54 pm-9:17 pm
1 stop25h 23m
OntarioSt. Louis
ONT - STL
ONTSTL
Ontario
mié. 11/19
12:58 am-6:58 pm
1 stop16h 00m
Lambert-St Louis
mar. 11/25
9:54 pm-2:26 pm
1 stop18h 32m
OntarioChicago
ONT - ORD
ONTORD
Ontario
jue. 11/20
8:45 am-11:56 pm
1 stop13h 11m
Chicago O'Hare Intl
mié. 11/26
6:30 am-4:21 pm
1 stop11h 51m
OntarioChicago
ONT - ORD
ONTORD
Ontario
jue. 1/15
6:56 pm-8:34 am
1 stop11h 38m
Chicago O'Hare Intl
lun. 1/19
9:37 am-6:12 pm
1 stop10h 35m
OntarioChicago
ONT - MDW
ONTMDW
Ontario
jue. 11/20
12:23 pm-6:12 pm
1 stop27h 49m
Chicago Midway
sáb. 11/22
3:55 pm-4:21 pm
1 stop26h 26m
OntarioSt. Louis
ONT - STL
ONTSTL
Ontario
lun. 11/24
8:15 am-6:19 pm
1 stop8h 04m
Lambert-St Louis
lun. 11/24
9:54 pm-2:26 pm
1 stop18h 32m
Currently, March is the cheapest month in which you can book a flight from Ontario to Illinois (average of $77). Flying from Ontario to Illinois in October is currently the most expensive (average of $147). 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 42% on flights from Ontario to Illinois by exploring options for tickets in the afternoon.
Travelers seeking maximum savings on their Ontario to Illinois flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from ONT to USIL are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
Comfort
Crew
Boarding
Entertainment
Overall
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Crew
Boarding
Entertainment
Overall
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Crew
Boarding
Entertainment
Overall
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Crew
Boarding
Entertainment
Overall
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Crew
Boarding
Entertainment
Overall
Food
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Crew
Boarding
Entertainment
Overall
Food
Reviews
Walter,Aug 2025
OAK - SAN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$110 | Average$217 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$227 | Average$463 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$237 | Average$423 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$246 | Average$490 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$381 | FlexibilityNo cancel fee | On-timeN/A |