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Cheap flights from Santa Rosa to Illinois from $136

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Santa Rosa to Illinois departing on 12/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Santa Rosa to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
6:58 am - 11:10 pmSTS-ORD
14h 12m1 stop
Alaska Airlines Logo
2:59 pm - 10:46 pmORD-STS
9h 47m1 stop
$286Alaska Airlines
Find Deal
Mon, Mar 9 - Tue, Mar 10
Alaska Airlines Logo
6:58 am - 11:10 pmSTS-ORD
14h 12m1 stop
Alaska Airlines Logo
2:59 pm - 10:46 pmORD-STS
9h 47m1 stop
$287Alaska Airlines
Find Deal
Mon, Mar 9 - Tue, Mar 10
Alaska Airlines Logo
8:00 am - 5:04 amSTS-ORD
19h 04m2 stops
Alaska Airlines Logo
2:59 pm - 10:46 pmORD-STS
9h 47m1 stop
$297Alaska Airlines
Find Deal
Mon, Mar 9 - Tue, Mar 10
Alaska Airlines Logo
8:00 am - 11:59 pmSTS-ORD
13h 59m2 stops
Alaska Airlines Logo
2:59 pm - 10:46 pmORD-STS
9h 47m1 stop
$298Alaska Airlines
Find Deal
Mon, Mar 9 - Tue, Mar 10
Alaska Airlines Logo
7:00 pm - 5:01 amSTS-ORD
8h 01m1 stop
Alaska Airlines Logo
8:59 pm - 2:36 pmORD-STS
19h 37m1 stop
$315Alaska Airlines
Find Deal
Sat, Nov 22 - Tue, Dec 2
Alaska Airlines Logo
6:35 am - 11:32 pmSTS-ORD
14h 57m1 stop
Alaska Airlines Logo
8:59 pm - 2:36 pmORD-STS
19h 37m1 stop
$332Alaska Airlines
Find Deal
Sun, Nov 23 - Tue, Dec 2
Hawaiian Airlines Logo
7:52 pm - 8:02 pmSTS-ORD
22h 10m1 stop
Hawaiian Airlines Logo
8:58 pm - 11:59 pmORD-STS
29h 01m1 stop
$459Hawaiian Airlines
Find Deal
Fri, Dec 19 - Sun, Dec 28
American Airlines Logo
12:46 pm - 11:47 pmSTS-STL
9h 01m1 stop
American Airlines Logo
8:12 am - 3:47 pmSTL-STS
9h 35m1 stop
$629American Airlines
Find Deal
Tue, Apr 14 - Wed, Apr 15
American Airlines Logo
2:10 pm - 11:51 pmSTS-STL
7h 41m1 stop
American Airlines Logo
7:21 am - 12:48 pmSTL-STS
7h 27m1 stop
$719American Airlines
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Wed, Nov 12 - Sun, Nov 16
American Airlines Logo
1:18 pm - 11:03 pmSTS-MLI
7h 45m1 stop
American Airlines Logo
5:46 am - 12:07 pmMLI-STS
8h 21m1 stop
$761American Airlines
Find Deal
Sat, Nov 15 - Tue, Nov 18

Alaska Airlines flights from Santa Rosa to Illinois

Our best Alaska Airlines deals on Santa Rosa to Illinois flight tickets
Alaska Airlines
Mar 9
STS6:58 amSanta Rosa Sonoma County
14h 12m
1 stop
ORD11:10 pmChicago O'Hare Intl
Mar 10
ORD2:59 pmChicago O'Hare Intl
9h 47m
1 stop
STS10:46 pmSanta Rosa Sonoma County
$286
Find similar
Alaska Airlines
Mar 9
STS6:58 amSanta Rosa Sonoma County
14h 12m
1 stop
ORD11:10 pmChicago O'Hare Intl
Mar 10
ORD2:59 pmChicago O'Hare Intl
9h 47m
1 stop
STS10:46 pmSanta Rosa Sonoma County
$287
Find similar
Alaska Airlines
Mar 9
STS8:00 amSanta Rosa Sonoma County
19h 04m
2 stops
ORD5:04 amChicago O'Hare Intl
Mar 10
ORD2:59 pmChicago O'Hare Intl
9h 47m
1 stop
STS10:46 pmSanta Rosa Sonoma County
$297
Find similar

American Airlines flights from Santa Rosa to Illinois

Our best American Airlines deals on Santa Rosa to Illinois flight tickets
American Airlines
Apr 14
STS12:46 pmSanta Rosa Sonoma County
9h 01m
1 stop
STL11:47 pmLambert-St Louis
Apr 15
STL8:12 amLambert-St Louis
9h 35m
1 stop
STS3:47 pmSanta Rosa Sonoma County
$629
Find similar
American Airlines
Nov 12
STS2:10 pmSanta Rosa Sonoma County
7h 41m
1 stop
STL11:51 pmLambert-St Louis
Nov 16
STL7:21 amLambert-St Louis
7h 27m
1 stop
STS12:48 pmSanta Rosa Sonoma County
$719
Find similar
American Airlines
Nov 15
STS1:18 pmSanta Rosa Sonoma County
7h 45m
1 stop
MLI11:03 pmMoline Quad-City
Nov 18
MLI5:46 amMoline Quad-City
8h 21m
1 stop
STS12:07 pmSanta Rosa Sonoma County
$761
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Santa Rosa to Illinois 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, momondo users made 832,500 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Santa Rosa to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 3/9

6:58 am-11:10 pm

1 stop14h 12m

Chicago O'Hare Intl

Tue 3/10

2:59 pm-10:46 pm

1 stop9h 47m

$286

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 3/9

6:58 am-11:10 pm

1 stop14h 12m

Chicago O'Hare Intl

Tue 3/10

2:59 pm-10:46 pm

1 stop9h 47m

$287

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 3/9

8:00 am-5:04 am

2 stops19h 04m

Chicago O'Hare Intl

Tue 3/10

2:59 pm-10:46 pm

1 stop9h 47m

$297

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 3/9

8:00 am-11:59 pm

2 stops13h 59m

Chicago O'Hare Intl

Tue 3/10

2:59 pm-10:46 pm

1 stop9h 47m

$298

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Sat 11/22

7:00 pm-5:01 am

1 stop8h 01m

Chicago O'Hare Intl

Tue 12/2

8:59 pm-2:36 pm

1 stop19h 37m

$315

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Sun 11/23

6:35 am-11:32 pm

1 stop14h 57m

Chicago O'Hare Intl

Tue 12/2

8:59 pm-2:36 pm

1 stop19h 37m

$332

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Fri 12/19

7:52 pm-8:02 pm

1 stop22h 10m

Chicago O'Hare Intl

Sun 12/28

8:58 pm-11:59 pm

1 stop29h 01m

$459

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Tue 4/14

12:46 pm-11:47 pm

1 stop9h 01m

Lambert-St Louis

Wed 4/15

8:12 am-3:47 pm

1 stop9h 35m

$629

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Wed 11/12

2:10 pm-11:51 pm

1 stop7h 41m

Lambert-St Louis

Sun 11/16

7:21 am-12:48 pm

1 stop7h 27m

$719

Santa RosaMoline

STS - MLI

STSMLI

Santa Rosa Sonoma County

Sat 11/15

1:18 pm-11:03 pm

1 stop7h 45m

Moline Quad-City

Tue 11/18

5:46 am-12:07 pm

1 stop8h 21m

$761

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

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

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Santa Rosa to Illinois is on a Friday when prices can be found for as low as $411. Flights from Santa Rosa to Illinois on a Sunday will generally be more expensive and average around $778. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Santa Rosa to Illinois during this time can be as low as $545. Flights in the morning are often more expensive with an average ticket price of $577.

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

Direct flights

None
There are no direct flights from Santa Rosa to Illinois. There are no popular flight routes from Santa Rosa to Illinois.
Search flight deals

  • 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?

  • 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 AirlinesPriceFrom $292Free CancellationRating
8.0
11,214 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $316Free CancellationRating
7.2
11,030 reviews
Search American 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.

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