$135+ Cheap flights from Illinois to Santa Rosa (STS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STS
Aug 5 — Aug 121
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to Santa Rosa
Keep the following information in mind while searching for Illinois to Santa Rosa flight deals. Data was last updated July 31, 2025.
Round-trip from | $326 (Alaska Airlines) |
|---|---|
One-way from | $153 (Alaska Airlines) |
Popular in | December |
Cheapest in | September |
Average price | $297 |
Find flight deals from Illinois to Santa Rosa
Cheapest flights from Illinois to Santa RosaExplore the most affordable flight options available from Illinois to Santa Rosa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.
Explore the most affordable flight options available from Illinois to Santa Rosa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.
This Alaska Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:50 pmORD - STS
1 stop20h 58mAlaska Airlines
Wed 12/178:00 amSTS - ORD
2 stops13h 10mAlaska Airlines
Deal found 7/30![Alaska Airlines logo]()
$326
This Hawaiian Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/113:50 pmORD - STS
1 stop9h 26mHawaiian Airlines
Thu 10/166:51 pmSTS - ORD
1 stop8h 10mHawaiian Airlines
Deal found 7/30![Hawaiian Airlines logo]()
$353
This Alaska Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:30 pmSTL - STS
1 stop27h 53mAlaska Airlines
Fri 9/55:55 pmSTS - STL
2 stops18h 44mAlaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$408
This Hawaiian Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/106:33 amSTL - STS
1 stop9h 03mHawaiian Airlines
Mon 10/132:30 pmSTS - STL
1 stop7h 33mHawaiian Airlines
Deal found 7/31![Hawaiian Airlines logo]()
$492
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/109:55 amORD - STS
1 stop7h 52mAmerican Airlines
Sun 8/174:17 pmSTS - ORD
1 stop6h 18mAmerican Airlines
Deal found 7/30![American Airlines logo]()
$829
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Santa Rosa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Illinois to Santa Rosa that are best for you.
Fly from
Illinois
Fly to
Santa Rosa
Route
Depart
Return
Price
ChicagoSanta Rosa
ORD - STS
ORDSTS
Chicago O'Hare Intl
Fri 12/12
6:50 pm-1:48 pm
1 stop20h 58m
Santa Rosa Sonoma County
Wed 12/17
8:00 am-11:10 pm
2 stops13h 10m
$326
ChicagoSanta Rosa
ORD - STS
ORDSTS
Chicago O'Hare Intl
Sat 10/11
3:50 pm-11:16 pm
1 stop9h 26m
Santa Rosa Sonoma County
Thu 10/16
6:51 pm-5:01 am
1 stop8h 10m
$353
St. LouisSanta Rosa
STL - STS
STLSTS
Lambert-St Louis
Mon 9/1
6:30 pm-8:23 pm
1 stop27h 53m
Santa Rosa Sonoma County
Fri 9/5
5:55 pm-2:39 pm
2 stops18h 44m
$408
St. LouisSanta Rosa
STL - STS
STLSTS
Lambert-St Louis
Fri 10/10
6:33 am-1:36 pm
1 stop9h 03m
Santa Rosa Sonoma County
Mon 10/13
2:30 pm-12:03 am
1 stop7h 33m
$492
ChicagoSanta Rosa
ORD - STS
ORDSTS
Chicago O'Hare Intl
Sun 8/10
9:55 am-3:47 pm
1 stop7h 52m
Santa Rosa Sonoma County
Sun 8/17
4:17 pm-12:35 am
1 stop6h 18m
$829
ChicagoSanta Rosa
ORD - STS
ORDSTS
Chicago O'Hare Intl
Tue 11/4
9:20 am-2:24 pm
1 stop7h 04m
$135
St. LouisSanta Rosa
STL - STS
STLSTS
Lambert-St Louis
Sun 8/31
6:00 am-1:36 pm
1 stop9h 36m
$173
St. LouisSanta Rosa
STL - STS
STLSTS
Lambert-St Louis
Sat 8/30
7:53 am-12:29 pm
1 stop6h 36m
$245
ChicagoSanta Rosa
ORD - STS
ORDSTS
Chicago O'Hare Intl
Tue 8/26
8:20 am-3:47 pm
2 stops9h 27m
$295
Best time to book a flight from Illinois to Santa Rosa
Have a flexible travel schedule? Discover the best time to fly to Santa Rosa from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Illinois to Santa Rosa
What is the cheapest month to book a flight from Illinois to Santa Rosa?
Currently, February is the cheapest month in which you can book a flight from Illinois to Santa Rosa (average of $202). Flying from Illinois to Santa Rosa in June is currently the most expensive (average of $395). 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.
What is the cheapest time of day to fly from IL to STS?
Find hourly flight availability from Illinois to Santa Rosa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Santa Rosa as you normally would.
Reviews of airlines servicing Santa Rosa
Get insights into the airlines that provide service to Santa Rosa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Santa Rosa. Reviews last updated July 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Hawaiian Airlines, and American Airlines from Illinois to Santa Rosa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Overall
8.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentJames,Apr 2025
LAX - SFO
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Overall
8.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentJames,Apr 2025
LAX - SFO
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Overall
8.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentJames,Apr 2025
LAX - SFO
Comfort
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.1
Overall
8.0
Food
7.1
Reviews
1 / 20
10.0
ExcellentJames,Apr 2025
LAX - SFO
Related info for your journey
Find useful and relevant information for your journey from Illinois to Santa Rosa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Santa Rosa?
Book flights to Santa Rosa if you plan to visit one of these locationsFort Bragg
Ukiah
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Alternative routes for Illinois to Santa Rosa
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Illinois to Santa Rosa
Discover the top airline that operate flights from Illinois to Santa Rosa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$363 | Average$658 | FlexibilityNo cancel fee | On-time71% |