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Santa Rosa

$206+ 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STS
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$314
(Trip.com)

One-way from

$206
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$289
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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 ($24 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 24, 2025.

This Trip.com deal was found by Cheapflights users on 4/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/76:10 amORD - STS
1 stop19h 20mMultiple Airlines
Sat 6/147:23 pmSTS - ORD
1 stop25h 42mMultiple Airlines
Deal found 4/23$314
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 5/297:00 amORD - STS
1 stop27h 58mAlaska Airlines
Mon 6/28:01 pmSTS - ORD
1 stop20h 54mAlaska Airlines
Deal found 4/23$379
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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.
Tue 5/206:52 amSTL - STS
1 stop18h 38mAlaska Airlines
Wed 5/287:00 amSTS - STL
1 stop14h 04mAlaska Airlines
Deal found 4/23$439
This American Airlines deal was found by Cheapflights users on 4/23. 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 5/2410:15 amORD - STS
1 stop7h 26mAmerican Airlines
Fri 5/304:21 pmSTS - ORD
1 stop6h 16mAmerican Airlines
Deal found 4/23$488
This American Airlines deal was found by Cheapflights users on 4/23. 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 7/265:31 amSTL - STS
2 stops8h 52mAmerican Airlines
Wed 7/3012:20 pmSTS - STL
1 stop6h 28mAmerican Airlines
Deal found 4/23$494
This Hawaiian Airlines deal was found by Cheapflights users on 4/23. 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 10/92:55 pmSTL - STS
1 stop9h 03mHawaiian Airlines
Sun 10/122:45 pmSTS - STL
1 stop7h 11mHawaiian Airlines
Deal found 4/23$582

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 24, 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 6/7

6:10 am-11:30 pm

1 stop19h 20m

Santa Rosa Sonoma County

Sat 6/14

7:23 pm-11:05 pm

1 stop25h 42m

$314

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Thu 5/29

7:00 am-8:58 am

1 stop27h 58m

Santa Rosa Sonoma County

Mon 6/2

8:01 pm-6:55 pm

1 stop20h 54m

$379

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Tue 5/20

6:52 am-11:30 pm

1 stop18h 38m

Santa Rosa Sonoma County

Wed 5/28

7:00 am-11:04 pm

1 stop14h 04m

$439

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 5/24

10:15 am-3:41 pm

1 stop7h 26m

Santa Rosa Sonoma County

Fri 5/30

4:21 pm-12:37 am

1 stop6h 16m

$488

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 7/26

5:31 am-12:23 pm

2 stops8h 52m

Santa Rosa Sonoma County

Wed 7/30

12:20 pm-8:48 pm

1 stop6h 28m

$494

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Thu 10/9

2:55 pm-9:58 pm

1 stop9h 03m

Santa Rosa Sonoma County

Sun 10/12

2:45 pm-11:56 pm

1 stop7h 11m

$582

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 6/9

6:00 am-1:25 pm

1 stop9h 25m

$206

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sun 6/15

1:03 pm-7:07 pm

1 stop8h 04m

$264

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 6/28

5:00 am-12:40 pm

2 stops9h 40m

$295

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Thu 5/8

3:08 pm-9:56 am

2 stops20h 48m

$348

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 11 results
1
2

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 24, 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 24, 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
9,918 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,918 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,393 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 Alaska Airlines ($206), Hawaiian Airlines ($264), and American Airlines ($295).

  • 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
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Alternative routes for Illinois to Santa Rosa

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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 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$363Average$583FlexibilityNo cancel feeOn-time71%

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