September is by far the best month, wherein you can get cheapest flights for Chicago to San Francisco. Meanwhile, September is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
September- During this month the footfall is less so, the flight is gradually inexpensive.
September - is the cheapest month to book round trip flights.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.
ORD
06:45
Chicago Chicago O Hare International Airport
Fri , 05 Sep 2025
SFO
09:24
San Francisco San Francisco International Airport
Fri, 05 Sep 2025
ORD
06:45
Chicago Chicago O Hare International Airport
Wed , 03 Sep 2025
SFO
09:24
San Francisco San Francisco International Airport
Wed, 03 Sep 2025
ORD
12:53
Chicago Chicago O Hare International Airport
Wed , 03 Sep 2025
SFO
15:30
San Francisco San Francisco International Airport
Wed, 03 Sep 2025
ORD
08:00
Chicago Chicago O Hare International Airport
Wed , 03 Sep 2025
SFO
13:44
San Francisco San Francisco International Airport
Wed, 03 Sep 2025
ORD
14:07
Chicago Chicago O Hare International Airport
Fri , 05 Sep 2025
SFO
19:45
San Francisco San Francisco International Airport
Fri, 05 Sep 2025
ORD
14:07
Chicago Chicago O Hare International Airport
Fri , 05 Sep 2025
SFO
19:45
San Francisco San Francisco International Airport
Fri, 05 Sep 2025
ORD
07:45
Chicago Chicago O Hare International Airport
Sun , 31 Aug 2025
SFO
12:11
San Francisco San Francisco International Airport
Sun, 31 Aug 2025
ORD
06:45
Chicago Chicago O Hare International Airport
Sun , 31 Aug 2025
SFO
09:15
San Francisco San Francisco International Airport
Sun, 31 Aug 2025
ORD
06:15
Chicago Chicago O Hare International Airport
Sun , 31 Aug 2025
SFO
08:56
San Francisco San Francisco International Airport
Sun, 31 Aug 2025
ORD
11:00
Chicago Chicago O Hare International Airport
Mon , 08 Sep 2025
SFO
17:48
San Francisco San Francisco International Airport
Mon, 08 Sep 2025
ORD
16:30
Chicago Chicago O Hare International Airport
Sun , 31 Aug 2025
SFO
19:03
San Francisco San Francisco International Airport
Sun, 31 Aug 2025
To crack the better offer on Chicago to San Francisco flights, it’s better to make advanced bookings at least few weeks prior of your intended date because price might rise eventually due to the delay.
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