What airlines fly to Illinois?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Santa Rosa according to our data. United Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Santa Rosa Sonoma County to Illinois?

Delta and Alaska Airlines are the most popular carriers operating from Santa Rosa Sonoma County to Illinois

When did momondo last update prices for flights from Santa Rosa Sonoma County Airport to Illinois?

Prices for flights from Santa Rosa Sonoma County Airport to Illinois are refreshed on a daily basis.

How many operators does momondo search for flights from Santa Rosa Sonoma County Airport to Illinois?

There are 2 operators available for flights from Santa Rosa Sonoma County Airport to Illinois as of August 2026.

How old do you have to be to fly from Santa Rosa Sonoma County Airport to Illinois?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Santa Rosa Sonoma County Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$133 Cheap Flights from Santa Rosa to Illinois in 2026

Find the cheapest flights from Santa Rosa to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:08 pm - 10:31 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

7h 23m1 stop Phoenix Sky Harbor Intl

6:00 am - 12:09 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 09m1 stop Dallas/Fort Worth

$299American Airlines

Sat, Sep 19 - Sat, Sep 26

7:00 am - 5:57 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

8h 57m1 stop Salt Lake City

7:30 am - 11:54 amORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

6h 24m1 stop Salt Lake City

$299Delta

Wed, Feb 3 - Sat, Feb 6

6:47 pm - 1:22 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

16h 35m1 stop San Diego

8:17 pm - 9:54 amORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

15h 37m1 stop San Diego

$299Alaska Airlines

Tue, Sep 22 - Mon, Sep 28

6:47 pm - 1:22 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

16h 35m1 stop San Diego

2:18 pm - 11:54 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

11h 36m1 stop San Diego

$299Alaska Airlines

Fri, Sep 11 - Wed, Sep 16

12:39 pm - 9:53 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

7h 14m1 stop Salt Lake City

7:30 am - 11:54 amORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

6h 24m1 stop Salt Lake City

$299Delta

Wed, Feb 3 - Wed, Feb 10

12:39 pm - 9:53 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

7h 14m1 stop Salt Lake City

7:30 am - 11:54 amORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

6h 24m1 stop Salt Lake City

$299Delta

Tue, Feb 2 - Wed, Feb 10

12:39 pm - 9:53 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

7h 14m1 stop Salt Lake City

7:30 am - 11:54 amORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

6h 24m1 stop Salt Lake City

$299Delta

Tue, Feb 2 - Sat, Feb 6

5:00 pm - 5:10 pmSTS Santa Rosa Sonoma County-STL Lambert-St Louis

22h 10m1 stop Portland

7:36 pm - 12:46 pmSTL Lambert-St Louis-STS Santa Rosa Sonoma County

19h 10m1 stop Seattle/Tacoma Intl

$409Alaska Airlines

Wed, Sep 16 - Mon, Sep 21

12:52 pm - 9:59 pmSTS Santa Rosa Sonoma County-STL Lambert-St Louis

7h 07m1 stop Dallas/Fort Worth

8:00 am - 12:48 pmSTL Lambert-St Louis-STS Santa Rosa Sonoma County

6h 48m1 stop Phoenix Sky Harbor Intl

$534American Airlines

Fri, Nov 27 - Thu, Dec 3

12:52 pm - 9:59 pmSTS Santa Rosa Sonoma County-STL Lambert-St Louis

7h 07m1 stop Dallas/Fort Worth

7:58 am - 3:55 pmSTL Lambert-St Louis-STS Santa Rosa Sonoma County

9h 57m1 stop Phoenix Sky Harbor Intl

$534American Airlines

Fri, Nov 27 - Tue, Dec 1

Cheap last minute flights

Enter your travel dates to find the best prices.

6:16 am - 7:21 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

11h 05m1 stop San Diego

6:00 am - 12:43 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 43m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Tue, Sep 1 - Sun, Sep 6

6:16 am - 7:21 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

11h 05m1 stop San Diego

6:00 am - 12:43 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 43m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Sat, Aug 29 - Sun, Sep 6

6:47 pm - 1:22 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

16h 35m1 stop San Diego

3:43 pm - 9:59 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 16m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Mon, Aug 31 - Sat, Sep 5

6:16 am - 7:21 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

11h 05m1 stop San Diego

3:43 pm - 9:59 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 16m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Tue, Sep 1 - Sat, Sep 5

6:47 pm - 1:22 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

16h 35m1 stop San Diego

6:00 am - 12:43 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 43m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Mon, Aug 31 - Sun, Sep 6

6:16 am - 7:21 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

11h 05m1 stop San Diego

3:43 pm - 9:59 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 16m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Sat, Aug 29 - Sat, Sep 5

6:47 pm - 1:22 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

16h 35m1 stop San Diego

6:00 am - 12:43 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 43m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Fri, Aug 28 - Sun, Sep 6

6:47 pm - 1:22 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

16h 35m1 stop San Diego

3:43 pm - 9:59 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

8h 16m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Fri, Aug 28 - Sat, Sep 5

12:39 pm - 10:41 pmSTS Santa Rosa Sonoma County-STL Lambert-St Louis

8h 02m1 stop Dallas/Fort Worth

8:00 am - 12:28 pmSTL Lambert-St Louis-STS Santa Rosa Sonoma County

6h 28m1 stop Phoenix Sky Harbor Intl

$1,069American Airlines

Sun, Aug 30 - Mon, Aug 31

12:39 pm - 11:42 pmSTS Santa Rosa Sonoma County-STL Lambert-St Louis

9h 03m1 stop Dallas/Fort Worth

5:42 am - 12:28 pmSTL Lambert-St Louis-STS Santa Rosa Sonoma County

8h 46m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

$1,074American Airlines

Sun, Aug 30 - Mon, Aug 31

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Delta flights from Santa Rosa to Illinois

Our best Delta deals on Santa Rosa to Illinois flight tickets

Delta

Feb 2

STS12:39 pmSanta Rosa Sonoma County

7h 14m

1 stop

ORD9:53 pmChicago O'Hare Intl

Feb 10

ORD7:30 amChicago O'Hare Intl

6h 24m

1 stop

STS11:54 amSanta Rosa Sonoma County

$299

Delta

Feb 2

STS12:39 pmSanta Rosa Sonoma County

7h 14m

1 stop

ORD9:53 pmChicago O'Hare Intl

Feb 6

ORD12:15 pmChicago O'Hare Intl

11h 33m

2 stops

STS9:48 pmSanta Rosa Sonoma County

$304

Delta

Nov 10

STS11:29 amSanta Rosa Sonoma County

8h 04m

2 stops

ORD9:33 pmChicago O'Hare Intl

Nov 11

ORD5:30 amChicago O'Hare Intl

12h 36m

2 stops

STS4:06 pmSanta Rosa Sonoma County

$309

Alaska Airlines flights from Santa Rosa to Illinois

Our best Alaska Airlines deals on Santa Rosa to Illinois flight tickets

Alaska Airlines

Sep 11

STS6:47 pmSanta Rosa Sonoma County

16h 35m

1 stop

ORD1:22 pmChicago O'Hare Intl

Sep 16

ORD2:18 pmChicago O'Hare Intl

11h 36m

1 stop

STS11:54 pmSanta Rosa Sonoma County

$299

Alaska Airlines

Sep 26

STS6:16 amSanta Rosa Sonoma County

11h 05m

1 stop

ORD7:21 pmChicago O'Hare Intl

Oct 3

ORD2:21 pmChicago O'Hare Intl

7h 29m

1 stop

STS7:50 pmSanta Rosa Sonoma County

$301

Alaska Airlines

Jan 26

STS2:12 pmSanta Rosa Sonoma County

21h 03m

1 stop

ORD1:15 pmChicago O'Hare Intl

Jan 30

ORD2:13 pmChicago O'Hare Intl

10h 44m

1 stop

STS10:57 pmSanta Rosa Sonoma County

$303

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Santa RosaChicago

STS Santa Rosa Sonoma County - ORD Chicago O'Hare Intl

STSORD

Santa Rosa Sonoma County

Sat 9/19

1:08 pm-10:31 pm

1 stop7h 23m

Chicago O'Hare Intl

Sat 9/26

6:00 am-12:09 pm

1 stop8h 09m

$299

Santa RosaChicago

STS Santa Rosa Sonoma County - ORD Chicago O'Hare Intl

STSORD

Santa Rosa Sonoma County

Wed 2/3

7:00 am-5:57 pm

1 stop8h 57m

Chicago O'Hare Intl

Sat 2/6

7:30 am-11:54 am

1 stop6h 24m

$299

Santa RosaChicago

STS Santa Rosa Sonoma County - ORD Chicago O'Hare Intl

STSORD

Santa Rosa Sonoma County

Tue 9/22

6:47 pm-1:22 pm

1 stop16h 35m

Chicago O'Hare Intl

Mon 9/28

8:17 pm-9:54 am

1 stop15h 37m

$299

Santa RosaChicago

STS Santa Rosa Sonoma County - ORD Chicago O'Hare Intl

STSORD

Santa Rosa Sonoma County

Fri 9/11

6:47 pm-1:22 pm

1 stop16h 35m

Chicago O'Hare Intl

Wed 9/16

2:18 pm-11:54 pm

1 stop11h 36m

$299

Quickest round-trip

Santa RosaChicago

STS Santa Rosa Sonoma County - ORD Chicago O'Hare Intl

STSORD

Santa Rosa Sonoma County

Wed 2/3

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Wed 2/10

7:30 am-11:54 am

1 stop6h 24m

$299

Santa RosaChicago

STS Santa Rosa Sonoma County - ORD Chicago O'Hare Intl

STSORD

Santa Rosa Sonoma County

Tue 2/2

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Wed 2/10

7:30 am-11:54 am

1 stop6h 24m

$299

Santa RosaChicago

STS Santa Rosa Sonoma County - ORD Chicago O'Hare Intl

STSORD

Santa Rosa Sonoma County

Tue 2/2

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Sat 2/6

7:30 am-11:54 am

1 stop6h 24m

$299

Santa RosaSt. Louis

STS Santa Rosa Sonoma County - STL Lambert-St Louis

STSSTL

Santa Rosa Sonoma County

Wed 9/16

5:00 pm-5:10 pm

1 stop22h 10m

Lambert-St Louis

Mon 9/21

7:36 pm-12:46 pm

1 stop19h 10m

$409

Santa RosaSt. Louis

STS Santa Rosa Sonoma County - STL Lambert-St Louis

STSSTL

Santa Rosa Sonoma County

Fri 11/27

12:52 pm-9:59 pm

1 stop7h 07m

Lambert-St Louis

Thu 12/3

8:00 am-12:48 pm

1 stop6h 48m

$534

Santa RosaSt. Louis

STS Santa Rosa Sonoma County - STL Lambert-St Louis

STSSTL

Santa Rosa Sonoma County

Fri 11/27

12:52 pm-9:59 pm

1 stop7h 07m

Lambert-St Louis

Tue 12/1

7:58 am-3:55 pm

1 stop9h 57m

$534

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Santa Rosa to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Santa Rosa is in January. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $315.

Can stopping save me money on Santa Rosa to Illinois flights?

You could potentially save up to 73% on your flight if you consider stops on a Santa Rosa to Illinois flight.

Cheap Santa Rosa to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Santa Rosa to Illinois

Best Price Found	$133
Fastest flight time	5h 53m
Direct flights	None

The best one-way flight to Illinois from Santa Rosa in the past 72 hours is $133. The best round-trip flight deal from Santa Rosa to Illinois found on momondo in the last 72 hours is $299.

The fastest flight from Santa Rosa to Illinois takes 5h 53m

There are no direct flights from Santa Rosa to Illinois. There are no popular flight routes from Santa Rosa to Illinois.

Search flight deals

Frequently asked questions about flying from Santa Rosa to Illinois

When did momondo last update prices for flights from Santa Rosa Sonoma County Airport to Illinois?
Prices for flights from Santa Rosa Sonoma County Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Santa Rosa Sonoma County Airport to Illinois?
There are 2 operators available for flights from Santa Rosa Sonoma County Airport to Illinois as of August 2026.
How old do you have to be to fly from Santa Rosa Sonoma County Airport to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Santa Rosa Sonoma County Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Santa Rosa to Illinois

Compare and see reviews for airlines that fly from Santa Rosa to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $276	Free Cancellation	Rating 7.9 12,847 reviews		Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Santa Rosa to Illinois?

Finding the right flight to Illinois from Santa Rosa is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Santa Rosa to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Santa Rosa to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Santa Rosa to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Santa Rosa to Illinois.

I’m not ready to book a flight from Santa Rosa to Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Santa Rosa to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.