Chicago to Ontario

MDWONT

Fly from Chicago to Ontario starting at USD 90 with Southwest Airlines.Best fare available on Sep 23, 2026.Limited seats. Better plans. Book before it's gone.

Chicago to Ontario cheapest flights this week

23 Sept
Southwest Airlines
17:25MDW
21:40ONT
DirectUSD 90VIEW DEAL
23 Sept
Southwest Airlines
06:40MDW
12:15ONT
1 StopUSD 148VIEW DEAL
24 Sept
Frontier Airlines
12:54MDW
20:39ONT
1 StopUSD 123VIEW DEAL
25 Sept
Southwest Airlines
18:15MDW
00:05ONT
1 StopUSD 149VIEW DEAL
26 Sept
Southwest Airlines
13:15MDW
20:25ONT
1 StopUSD 152VIEW DEAL
27 Sept
Southwest Airlines
05:40MDW
13:35ONT
1 StopUSD 149VIEW DEAL
27 Sept
Southwest Airlines
05:25MDW
11:30ONT
1 StopUSD 162VIEW DEAL
28 Sept
Frontier Airlines
12:54MDW
20:39ONT
1 StopUSD 137VIEW DEAL
29 Sept
Southwest Airlines
18:00MDW
00:05ONT
1 StopUSD 145VIEW DEAL
30 Sept
Southwest Airlines
18:00MDW
00:05ONT
1 StopUSD 154VIEW DEAL

Chicago to Ontario monthly flight fare trend

Sep
from USD 90
Oct
from USD 74
Nov
from USD 123
Dec
from USD 103
Jan
from USD 123
Feb
from USD 146

Airport Details

Origin

Chicago

Chicago Midway International Airport (MDW)

Chicago, MDW
Zone

Chicago

Elev

620 ft

Destination

Ontario

Ontario International Airport (ONT)

Ontario, ONT
Zone

Los Angeles

Elev

944 ft

Flights from Chicago

Flights from Chicago to AtlantaFlights from Chicago to AustinFlights from Chicago to BostonFlights from Chicago to CharlotteFlights from Chicago to DenverFlights from Chicago to DallasFlights from Chicago to DetroitFlights from Chicago to NewarkFlights from Chicago to Fort LauderdaleFlights from Chicago to Honolulu