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

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

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 50% 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.

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 is 1 operator available for flights from Santa Rosa Sonoma County Airport to Illinois as of October 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.

$150 Cheap Flights from Santa Rosa to Illinois in 2026/27

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.

8:20 pm - 1:17 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

14h 57m1 stop San Diego

7:57 pm - 1:57 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

20h 00m1 stop San Diego

$299Alaska Airlines

Thu, Nov 12 - Mon, Nov 16

7:05 pm - 1:09 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

16h 04m1 stop Portland

7:57 pm - 1:57 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

20h 00m1 stop San Diego

$299Alaska Airlines

Fri, Nov 6 - Mon, Nov 9

7:00 am - 3:27 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

6h 27m1 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

Thu, Jan 7 - Mon, Jan 11

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

Sat, Jan 16 - Sat, Jan 23

7:20 am - 4:10 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

6h 50m1 stop Phoenix Sky Harbor Intl

5:00 am - 12:19 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

9h 19m1 stop Dallas/Fort Worth

$299American Airlines

Thu, Nov 19 - Mon, Nov 23

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, Jan 19 - Sat, Jan 23

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, Jan 19 - Wed, Jan 20

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

Sat, Jan 16 - Thu, Jan 21

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

Sat, Jan 23 - Thu, Jan 28

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

Thu, Jan 21 - Sat, Jan 23

Cheap last minute flights

Enter your travel dates to find the best prices.

7:00 am - 6:20 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

9h 20m1 stop Seattle/Tacoma Intl

6:00 am - 1:06 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

9h 06m1 stop Seattle/Tacoma Intl

$763Alaska Airlines

Wed, Oct 21 - Sun, Oct 25

2:00 pm - 6:53 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

26h 53m2 stops Las Vegas Harry Reid Intl San Diego

6:00 am - 1:06 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

9h 06m1 stop Seattle/Tacoma Intl

$806Alaska Airlines

Wed, Oct 21 - Sun, Oct 25

6:35 am - 5:05 pmSTS Santa Rosa Sonoma County-MDW Chicago Midway

8h 30m1 stop San Diego

5:20 am - 9:55 amMDW Chicago Midway-STS Santa Rosa Sonoma County

6h 35m1 stop Las Vegas Harry Reid Intl

$839Southwest

Wed, Oct 21 - Sun, Oct 25

6:35 am - 8:20 pmSTS Santa Rosa Sonoma County-MDW Chicago Midway

11h 45m2 stops San Diego Phoenix Sky Harbor Intl

5:20 am - 9:55 amMDW Chicago Midway-STS Santa Rosa Sonoma County

6h 35m1 stop Las Vegas Harry Reid Intl

$844Southwest

Wed, Oct 21 - Sun, Oct 25

6:35 am - 8:20 pmSTS Santa Rosa Sonoma County-MDW Chicago Midway

11h 45m2 stops San Diego Phoenix Sky Harbor Intl

10:00 am - 3:55 pmMDW Chicago Midway-STS Santa Rosa Sonoma County

7h 55m2 stops Omaha Eppley Airfield Denver Intl

$849Southwest

Wed, Oct 21 - Sun, Oct 25

2:00 pm - 6:53 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

26h 53m2 stops Las Vegas Harry Reid Intl San Diego

7:20 am - 4:12 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

34h 52m2 stops San Diego Las Vegas Harry Reid Intl

$876Alaska Airlines

Mon, Oct 19 - Wed, Oct 21

4:35 pm - 1:25 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

18h 50m1 stop San Diego

7:20 am - 4:12 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

34h 52m2 stops San Diego Las Vegas Harry Reid Intl

$891Alaska Airlines

Mon, Oct 19 - Wed, Oct 21

4:35 pm - 1:25 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

18h 50m1 stop San Diego

7:20 am - 2:52 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

9h 32m1 stop San Diego

$907Alaska Airlines

Tue, Oct 20 - Sat, Oct 24

6:19 am - 6:53 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

10h 34m1 stop San Diego

2:21 pm - 7:50 pmORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

7h 29m1 stop San Diego

$907Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

4:35 pm - 6:53 pmSTS Santa Rosa Sonoma County-ORD Chicago O'Hare Intl

24h 18m1 stop San Diego

2:21 pm - 9:59 amORD Chicago O'Hare Intl-STS Santa Rosa Sonoma County

21h 38m1 stop San Diego

$907Alaska Airlines

Mon, Oct 19 - Wed, Oct 21

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American Airlines flights from Santa Rosa to Illinois

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

American Airlines

Nov 2

STS1:18 pmSanta Rosa Sonoma County

8h 20m

1 stop

ORD11:38 pmChicago O'Hare Intl

Nov 9

ORD5:00 amChicago O'Hare Intl

9h 54m

1 stop

STS12:54 pmSanta Rosa Sonoma County

$300

American Airlines

Dec 1

STS1:29 pmSanta Rosa Sonoma County

8h 05m

1 stop

ORD11:34 pmChicago O'Hare Intl

Dec 7

ORD5:00 amChicago O'Hare Intl

9h 46m

1 stop

STS12:46 pmSanta Rosa Sonoma County

$342

American Airlines

Dec 3

STS1:18 pmSanta Rosa Sonoma County

8h 20m

1 stop

ORD11:38 pmChicago O'Hare Intl

Dec 6

ORD5:00 amChicago O'Hare Intl

9h 46m

1 stop

STS12:46 pmSanta Rosa Sonoma County

$392

Alaska Airlines flights from Santa Rosa to Illinois

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

Alaska Airlines

Jan 26

STS7:00 amSanta Rosa Sonoma County

8h 59m

1 stop

ORD5:59 pmChicago O'Hare Intl

Jan 30

ORD2:11 pmChicago O'Hare Intl

7h 04m

1 stop

STS7:15 pmSanta Rosa Sonoma County

$349

Alaska Airlines

Nov 6

STS8:20 pmSanta Rosa Sonoma County

14h 57m

1 stop

ORD1:17 pmChicago O'Hare Intl

Nov 9

ORD7:20 amChicago O'Hare Intl

11h 09m

2 stops

STS4:29 pmSanta Rosa Sonoma County

$366

Alaska Airlines

Nov 12

STS7:01 pmSanta Rosa Sonoma County

32h 39m

2 stops

ORD5:40 amChicago O'Hare Intl

Nov 16

ORD2:15 pmChicago O'Hare Intl

10h 23m

1 stop

STS10:38 pmSanta Rosa Sonoma County

$386

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

Thu 11/12

8:20 pm-1:17 pm

1 stop14h 57m

Chicago O'Hare Intl

Mon 11/16

7:57 pm-1:57 pm

1 stop20h 00m

$299

Santa RosaChicago

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

STSORD

Santa Rosa Sonoma County

Fri 11/6

7:05 pm-1:09 pm

1 stop16h 04m

Chicago O'Hare Intl

Mon 11/9

7:57 pm-1:57 pm

1 stop20h 00m

$299

Quickest round-trip

Santa RosaChicago

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

STSORD

Santa Rosa Sonoma County

Thu 1/7

7:00 am-3:27 pm

1 stop6h 27m

Chicago O'Hare Intl

Mon 1/11

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

Sat 1/16

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Sat 1/23

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

Thu 11/19

7:20 am-4:10 pm

1 stop6h 50m

Chicago O'Hare Intl

Mon 11/23

5:00 am-12:19 pm

1 stop9h 19m

$299

Santa RosaChicago

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

STSORD

Santa Rosa Sonoma County

Tue 1/19

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Sat 1/23

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 1/19

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Wed 1/20

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

Sat 1/16

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Thu 1/21

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

Sat 1/23

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Thu 1/28

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

Thu 1/21

12:39 pm-9:53 pm

1 stop7h 14m

Chicago O'Hare Intl

Sat 1/23

7:30 am-11:54 am

1 stop6h 24m

$299

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 February. 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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $0.

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

You could potentially save up to 79% 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	$150
Fastest flight time	5h 56m
Direct flights	None

The best one-way flight to Illinois from Santa Rosa in the past 72 hours is $150. 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 56m

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 is 1 operator available for flights from Santa Rosa Sonoma County Airport to Illinois as of October 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 $298	Free Cancellation	Rating 7.9 13,072 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.