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Santa Rosa

$159+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STS
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
1 adult, Economy
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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 April 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$317
(American Airlines)

One-way from

$159
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$287
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From Illinois to Santa Rosa Sonoma County
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One-way flight from Illinois to Santa Rosa Sonoma County
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Highest demand for flights based on searches. 7% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Illinois to Santa Rosa

Cheapest flights from Illinois to Santa Rosa
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 April 4, 2025.

This American Airlines deal was found by Cheapflights users on 4/3. 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.
Sat 5/107:06 amORD - STS
1 stop7h 10mAmerican Airlines
Wed 5/144:21 pmSTS - ORD
1 stop6h 16mAmerican Airlines
Deal found 4/3$317
This Mytrip deal was found by Cheapflights users on 4/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2411:53 amORD - STS
2 stops27h 29mMultiple Airlines
Mon 4/289:16 amSTS - ORD
2 stops42h 29mMultiple Airlines
Deal found 4/4$329
This Alaska Airlines deal was found by Cheapflights users on 4/4. 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 5/56:58 pmORD - STS
2 stops19h 07mAlaska Airlines
Sat 5/1011:44 amSTS - ORD
1 stop23h 23mAlaska Airlines
Deal found 4/4$345
This American Airlines deal was found by Cheapflights users on 4/4. 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.
Sat 7/267:00 amSTL - STS
1 stop6h 41mAmerican Airlines
Tue 7/2912:20 pmSTS - STL
1 stop8h 37mAmerican Airlines
Deal found 4/4$489
This Hawaiian Airlines deal was found by Cheapflights users on 4/4. 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.
Thu 11/62:55 pmSTL - STS
1 stop9h 03mHawaiian Airlines
Sun 11/92:45 pmSTS - STL
1 stop7h 11mHawaiian Airlines
Deal found 4/4$510
This Alaska Airlines deal was found by Cheapflights users on 4/4. 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.
Thu 11/67:00 amSTL - STS
1 stop16h 58mAlaska Airlines
Sun 11/97:00 pmSTS - STL
2 stops16h 52mAlaska Airlines
Deal found 4/4$545
This Hawaiian Airlines deal was found by Cheapflights users on 4/3. 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.
Wed 7/161:03 pmORD - STS
1 stop8h 04mHawaiian Airlines
Sun 7/208:01 pmSTS - ORD
1 stop7h 39mHawaiian Airlines
Deal found 4/3$696

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 April 4, 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

Sat 5/10

7:06 am-12:16 pm

1 stop7h 10m

Santa Rosa Sonoma County

Wed 5/14

4:21 pm-12:37 am

1 stop6h 16m

$317

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Thu 4/24

11:53 am-1:22 pm

2 stops27h 29m

Santa Rosa Sonoma County

Mon 4/28

9:16 am-5:45 am

2 stops42h 29m

$329

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 5/5

6:58 pm-12:05 pm

2 stops19h 07m

Santa Rosa Sonoma County

Sat 5/10

11:44 am-1:07 pm

1 stop23h 23m

$345

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 7/26

7:00 am-11:41 am

1 stop6h 41m

Santa Rosa Sonoma County

Tue 7/29

12:20 pm-10:57 pm

1 stop8h 37m

$489

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 7/26

10:08 am-7:07 pm

2 stops10h 59m

Santa Rosa Sonoma County

Tue 7/29

6:47 pm-9:18 am

2 stops12h 31m

$599

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Wed 7/16

1:03 pm-7:07 pm

1 stop8h 04m

Santa Rosa Sonoma County

Sun 7/20

8:01 pm-5:40 am

1 stop7h 39m

$696

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 4/29

6:00 am-12:17 pm

1 stop8h 17m

$159

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 4/29

7:19 pm-11:04 am

2 stops17h 45m

$173

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Tue 5/6

6:30 am-4:44 pm

2 stops12h 14m

$204

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sun 4/27

7:12 pm-1:22 pm

1 stop20h 10m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 13 results
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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 April 4, 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.

Rainfall in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Santa Rosa ranges from 0.0 - 7.1 inches per month. January is typically the wettest month, when rainfall can reach 7.1 in. July is typically the driest time to visit Santa Rosa when rainfall is around 0.0 in.

Temperature in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Santa Rosa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 46.4 F).

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 April 4, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Hawaiian Airlines and American Airlines from Illinois to Santa Rosa to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,837 reviews

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
9,837 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Hawaiian Airlines
7.9
Good
2,353 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

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.

  • What airport do you fly into for flights to Santa Rosa from Illinois?

    Located just 7.2 mi from the city center, Santa Rosa Sonoma County (STS) is the airport most travelers will use when flying to Santa Rosa from Illinois.

  • What are the cheapest airlines to fly from Illinois to Santa Rosa one-way?

    The cheapest airlines for a one-way flight from Illinois to Santa Rosa are American Airlines ($159), Alaska Airlines ($173), and Hawaiian Airlines ($472).

  • Can I find deals for flights from Illinois to Santa Rosa that include hotel bookings?

    Yes. In addition to deals on Illinois to Santa Rosa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Santa Rosa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Santa Rosa.

  • Can I find deals for business class flights from Illinois to Santa Rosa?

    Yes. Cheapflights offers flight deals from Illinois to Santa Rosa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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.

See more FAQs

Traveling to a place near Illinois?

Book flights to Illinois if you plan to visit one of these locations
Fort Bragg
Ukiah
Mendocino

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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.
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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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$363Average$583FlexibilityNo cancel feeOn-time71%

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