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Cheap flights from Santa Rosa to Illinois from $140

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 10/22. 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

Alaska Airlines Logo
2:09 pm - 11:59 pmSTS-ORD
7h 50m1 stop
Alaska Airlines Logo
9:20 am - 4:02 pmORD-STS
8h 42m1 stop
$269Alaska Airlines
Find Deal
Tue, Oct 28 - Wed, Nov 19
Alaska Airlines Logo
2:09 pm - 11:59 pmSTS-ORD
7h 50m1 stop
Alaska Airlines Logo
9:20 am - 9:46 pmORD-STS
14h 26m2 stops
$272Alaska Airlines
Find Deal
Tue, Oct 28 - Sat, Nov 15
Alaska Airlines Logo
10:50 am - 11:59 pmSTS-ORD
11h 09m2 stops
Alaska Airlines Logo
9:20 am - 9:46 pmORD-STS
14h 26m2 stops
$275Alaska Airlines
Find Deal
Tue, Oct 28 - Sat, Nov 15
Alaska Airlines Logo
7:53 pm - 11:59 pmSTS-ORD
26h 06m1 stop
Alaska Airlines Logo
3:50 pm - 11:16 pmORD-STS
9h 26m1 stop
$287Alaska Airlines
Find Deal
Tue, Oct 7 - Wed, Oct 15
Alaska Airlines Logo
9:43 am - 11:59 pmSTS-ORD
12h 16m2 stops
Alaska Airlines Logo
3:50 pm - 10:07 amORD-STS
20h 17m1 stop
$290Alaska Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Alaska Airlines Logo
2:28 pm - 12:03 amSTS-ORD
7h 35m1 stop
Alaska Airlines Logo
3:50 pm - 11:16 pmORD-STS
9h 26m1 stop
$293Alaska Airlines
Find Deal
Wed, Oct 1 - Wed, Oct 15
Alaska Airlines Logo
9:43 am - 11:59 pmSTS-ORD
12h 16m2 stops
Alaska Airlines Logo
8:00 am - 1:36 pmORD-STS
7h 36m1 stop
$297Alaska Airlines
Find Deal
Tue, Oct 7 - Sat, Oct 18
Logo
7:03 am - 6:14 pmSTS-ORD
9h 11m1 stop
Logo
8:00 am - 1:36 pmORD-STS
7h 36m1 stop
$370
Find Deal
Tue, Sep 16 - Tue, Sep 23
American Airlines Logo
1:00 pm - 10:50 pmSTS-STL
7h 50m2 stops
American Airlines Logo
7:00 am - 3:47 pmSTL-STS
10h 47m2 stops
$499American Airlines
Find Deal
Wed, Oct 1 - Wed, Oct 8
American Airlines Logo
4:17 pm - 10:52 amSTS-MLI
16h 35m2 stops
American Airlines Logo
10:42 am - 1:48 pmMLI-STS
29h 06m2 stops
$739American Airlines
Find Deal
Tue, Oct 28 - Sat, Nov 1

Alaska Airlines flights from Santa Rosa to Illinois

Our best Alaska Airlines deals on Santa Rosa to Illinois flight tickets
Alaska Airlines
Oct 28
STS2:09 pmSanta Rosa Sonoma County
7h 50m
1 stop
ORD11:59 pmChicago O'Hare Intl
Nov 19
ORD9:20 amChicago O'Hare Intl
8h 42m
1 stop
STS4:02 pmSanta Rosa Sonoma County
$269
Find similar
Alaska Airlines
Oct 28
STS2:09 pmSanta Rosa Sonoma County
7h 50m
1 stop
ORD11:59 pmChicago O'Hare Intl
Nov 15
ORD9:20 amChicago O'Hare Intl
14h 26m
2 stops
STS9:46 pmSanta Rosa Sonoma County
$272
Find similar
Alaska Airlines
Oct 28
STS10:50 amSanta Rosa Sonoma County
11h 09m
2 stops
ORD11:59 pmChicago O'Hare Intl
Nov 15
ORD9:20 amChicago O'Hare Intl
14h 26m
2 stops
STS9:46 pmSanta Rosa Sonoma County
$275
Find similar

American Airlines flights from Santa Rosa to Illinois

Our best American Airlines deals on Santa Rosa to Illinois flight tickets
American Airlines
Oct 1
STS1:00 pmSanta Rosa Sonoma County
7h 50m
2 stops
STL10:50 pmLambert-St Louis
Oct 8
STL7:00 amLambert-St Louis
10h 47m
2 stops
STS3:47 pmSanta Rosa Sonoma County
$499
Find similar
American Airlines
Oct 28
STS4:17 pmSanta Rosa Sonoma County
16h 35m
2 stops
MLI10:52 amMoline Quad-City
Nov 1
MLI10:42 amMoline Quad-City
29h 06m
2 stops
STS1:48 pmSanta Rosa Sonoma County
$739
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 August 28, 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

Tue 10/28

2:09 pm-11:59 pm

1 stop7h 50m

Chicago O'Hare Intl

Wed 11/19

9:20 am-4:02 pm

1 stop8h 42m

$269

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/28

2:09 pm-11:59 pm

1 stop7h 50m

Chicago O'Hare Intl

Sat 11/15

9:20 am-9:46 pm

2 stops14h 26m

$272

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/28

10:50 am-11:59 pm

2 stops11h 09m

Chicago O'Hare Intl

Sat 11/15

9:20 am-9:46 pm

2 stops14h 26m

$275

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/7

7:53 pm-11:59 pm

1 stop26h 06m

Chicago O'Hare Intl

Wed 10/15

3:50 pm-11:16 pm

1 stop9h 26m

$287

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/7

9:43 am-11:59 pm

2 stops12h 16m

Chicago O'Hare Intl

Tue 10/14

3:50 pm-10:07 am

1 stop20h 17m

$290

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Wed 10/1

2:28 pm-12:03 am

1 stop7h 35m

Chicago O'Hare Intl

Wed 10/15

3:50 pm-11:16 pm

1 stop9h 26m

$293

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 10/7

9:43 am-11:59 pm

2 stops12h 16m

Chicago O'Hare Intl

Sat 10/18

8:00 am-1:36 pm

1 stop7h 36m

$297

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 9/16

7:03 am-6:14 pm

1 stop9h 11m

Chicago O'Hare Intl

Tue 9/23

8:00 am-1:36 pm

1 stop7h 36m

$370

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Wed 10/1

1:00 pm-10:50 pm

2 stops7h 50m

Lambert-St Louis

Wed 10/8

7:00 am-3:47 pm

2 stops10h 47m

$499

Santa RosaMoline

STS - MLI

STSMLI

Santa Rosa Sonoma County

Tue 10/28

4:17 pm-10:52 am

2 stops16h 35m

Moline Quad-City

Sat 11/1

10:42 am-1:48 pm

2 stops29h 06m

$739

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.
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  • 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 $308Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $318Free CancellationRating
7.2
10,000 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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