
| Most accurate provider | eDreams 3 stars | 
|---|---|
| Most trusted provider | eDreams 3 stars | 
| Round-trip from | $287 (Alaska Airlines) | 
| One-way from | $162 (Alaska Airlines) | 
| Popular in | December | 
| Cheapest in | February | 
| Average price | $389 | 
Fly from
Fly to
Route
Depart
Return
Price
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Mon 3/9
6:58 am-11:10 pm
1 stop14h 12m
Chicago O'Hare Intl
Tue 3/10
2:59 pm-10:46 pm
1 stop9h 47m
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Sat 11/22
7:00 pm-5:01 am
1 stop8h 01m
Chicago O'Hare Intl
Tue 12/2
8:59 pm-2:36 pm
1 stop19h 37m
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Tue 11/18
7:46 pm-1:54 pm
1 stop16h 08m
Chicago O'Hare Intl
Tue 12/2
8:59 pm-2:36 pm
1 stop19h 37m
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Sun 12/21
8:17 pm-5:02 am
1 stop6h 45m
Chicago O'Hare Intl
Wed 12/31
3:37 pm-11:23 am
1 stop21h 46m
Santa RosaSt. Louis
STS - STL
STSSTL
Santa Rosa Sonoma County
Tue 4/14
7:00 am-11:55 pm
2 stops14h 55m
Lambert-St Louis
Wed 4/15
2:55 pm-9:51 pm
1 stop8h 56m
Santa RosaSt. Louis
STS - STL
STSSTL
Santa Rosa Sonoma County
Tue 4/14
12:46 pm-11:47 pm
1 stop9h 01m
Lambert-St Louis
Wed 4/15
8:12 am-3:47 pm
1 stop9h 35m
Santa RosaSt. Louis
STS - STL
STSSTL
Santa Rosa Sonoma County
Wed 11/12
10:50 am-11:59 pm
2 stops35h 09m
Lambert-St Louis
Sun 11/16
7:00 am-1:26 pm
1 stop8h 26m
Santa RosaSt. Louis
STS - STL
STSSTL
Santa Rosa Sonoma County
Wed 11/12
2:10 pm-11:51 pm
1 stop7h 41m
Lambert-St Louis
Sun 11/16
7:21 am-12:48 pm
1 stop7h 27m
Santa RosaMoline
STS - MLI
STSMLI
Santa Rosa Sonoma County
Sat 11/15
1:18 pm-11:03 pm
1 stop7h 45m
Moline Quad-City
Tue 11/18
5:46 am-12:07 pm
1 stop8h 21m
Santa RosaMoline
STS - MLI
STSMLI
Santa Rosa Sonoma County
Sat 11/15
8:03 pm-9:20 am
2 stops11h 17m
Moline Quad-City
Tue 11/18
9:50 am-7:27 pm
2 stops11h 37m
Currently, April is the cheapest month in which you can book a flight from Santa Rosa to Illinois (average of $126). Flying from Santa Rosa to Illinois in March is currently the most expensive (average of $207). 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.
When flying from Santa Rosa to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 28% versus a flight in the morning.
Comfort
Entertainment
Food
Overall
Boarding
Crew
Reviews
Hannah,Aug 2025
SFO - SAN
Comfort
Entertainment
Food
Overall
Boarding
Crew
Reviews
Hannah,Aug 2025
SFO - SAN
Comfort
Entertainment
Food
Overall
Boarding
Crew
Reviews
Hannah,Aug 2025
SFO - SAN
| Airline | Cheapest | Average | Flexibility | On-time | 
|---|---|---|---|---|
| Cheapest$292 | Average$506 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$316 | Average$653 | FlexibilityNo cancel fee | On-time71% |