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Cheap flights from Illinois to San Francisco from $133

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to San Francisco departing on 4/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Illinois to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
3:52 pm - 11:27 pm
ORD
-
STS
9h 35m
1 stop
Alaska Airlines Logo
8:00 pm - 1:13 pm
STS
-
ORD
15h 13m
1 stop
$305Alaska Airlines
Fri, May 1 - Sun, May 3
Alaska Airlines Logo
3:52 pm - 11:25 am
ORD
-
STS
21h 33m
1 stop
Alaska Airlines Logo
7:01 am - 6:50 pm
STS
-
ORD
9h 49m
1 stop
$309Alaska Airlines
Tue, May 12 - Tue, May 19
Alaska Airlines Logo
3:52 pm - 10:58 am
ORD
-
STS
21h 06m
1 stop
Alaska Airlines Logo
1:13 pm - 11:59 pm
STS
-
ORD
8h 46m
1 stop
$315Alaska Airlines
Tue, May 5 - Wed, May 6
Alaska Airlines Logo
2:10 pm - 11:50 pm
ORD
-
STS
11h 40m
1 stop
Alaska Airlines Logo
7:01 am - 6:50 pm
STS
-
ORD
9h 49m
1 stop
$329Alaska Airlines
Thu, May 14 - Wed, May 20
Alaska Airlines Logo
7:59 pm - 11:25 am
ORD
-
STS
17h 26m
1 stop
Alaska Airlines Logo
7:40 pm - 1:14 pm
STS
-
ORD
15h 34m
1 stop
$333Alaska Airlines
Tue, May 12 - Mon, May 18
Alaska Airlines Logo
8:50 am - 11:25 am
ORD
-
STS
28h 35m
1 stop
Alaska Airlines Logo
7:40 pm - 11:55 pm
STS
-
ORD
26h 15m
1 stop
$353Alaska Airlines
Tue, May 12 - Sat, May 16
Alaska Airlines Logo
6:00 am - 12:21 pm
ORD
-
STS
8h 21m
1 stop
Alaska Airlines Logo
1:13 pm - 11:59 pm
STS
-
ORD
8h 46m
1 stop
$357Alaska Airlines
Tue, May 5 - Wed, May 6
Alaska Airlines Logo
8:48 pm - 11:10 am
ORD
-
STS
16h 22m
2 stops
Alaska Airlines Logo
7:01 am - 6:50 pm
STS
-
ORD
9h 49m
1 stop
$358Alaska Airlines
Tue, May 12 - Wed, May 20
American Airlines Logo
5:20 am - 3:53 pm
STL
-
STS
12h 33m
2 stops
American Airlines Logo
12:56 pm - 11:59 pm
STS
-
STL
9h 03m
1 stop
$434American Airlines
Sat, Apr 25 - Sat, May 2
American Airlines Logo
5:20 am - 3:53 pm
STL
-
STS
12h 33m
2 stops
American Airlines Logo
12:56 pm - 10:57 pm
STS
-
STL
8h 01m
2 stops
$439American Airlines
Sat, Apr 25 - Sat, May 2

American Airlines flights from Illinois to Santa Rosa

Our best American Airlines deals on Illinois to Santa Rosa flight tickets
American Airlines
Apr 25
STL5:20 amLambert-St Louis
12h 33m
2 stops
STS3:53 pmSanta Rosa Sonoma County
May 2
STS12:56 pmSanta Rosa Sonoma County
9h 03m
1 stop
STL11:59 pmLambert-St Louis
$434
American Airlines
Apr 25
STL5:20 amLambert-St Louis
12h 33m
2 stops
STS3:53 pmSanta Rosa Sonoma County
May 2
STS12:56 pmSanta Rosa Sonoma County
8h 01m
2 stops
STL10:57 pmLambert-St Louis
$439
American Airlines
Apr 25
STL5:20 amLambert-St Louis
12h 33m
2 stops
STS3:53 pmSanta Rosa Sonoma County
May 2
STS12:56 pmSanta Rosa Sonoma County
9h 03m
1 stop
STL11:59 pmLambert-St Louis
$453

Alaska Airlines flights from Illinois to Santa Rosa

Our best Alaska Airlines deals on Illinois to Santa Rosa flight tickets
Alaska Airlines
May 1
ORD3:52 pmChicago O'Hare Intl
9h 35m
1 stop
STS11:27 pmSanta Rosa Sonoma County
May 3
STS8:00 pmSanta Rosa Sonoma County
15h 13m
1 stop
ORD1:13 pmChicago O'Hare Intl
$305
Alaska Airlines
May 12
ORD3:52 pmChicago O'Hare Intl
21h 33m
1 stop
STS11:25 amSanta Rosa Sonoma County
May 19
STS7:01 amSanta Rosa Sonoma County
9h 49m
1 stop
ORD6:50 pmChicago O'Hare Intl
$309
Alaska Airlines
May 5
ORD3:52 pmChicago O'Hare Intl
21h 06m
1 stop
STS10:58 amSanta Rosa Sonoma County
May 6
STS1:13 pmSanta Rosa Sonoma County
8h 46m
1 stop
ORD11:59 pmChicago O'Hare Intl
$315

momondo 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, momondo users made 832,500 searches. Data last updated March 18, 2026.
Use the filters below to find and compare flights from Illinois to Santa Rosa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Fri 5/1

3:52 pm-11:27 pm

1 stop9h 35m

Santa Rosa Sonoma County

Sun 5/3

8:00 pm-1:13 pm

1 stop15h 13m

$305

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 5/12

3:52 pm-11:25 am

1 stop21h 33m

Santa Rosa Sonoma County

Tue 5/19

7:01 am-6:50 pm

1 stop9h 49m

$309

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 5/5

3:52 pm-10:58 am

1 stop21h 06m

Santa Rosa Sonoma County

Wed 5/6

1:13 pm-11:59 pm

1 stop8h 46m

$315

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Thu 5/14

2:10 pm-11:50 pm

1 stop11h 40m

Santa Rosa Sonoma County

Wed 5/20

7:01 am-6:50 pm

1 stop9h 49m

$329

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 5/12

7:59 pm-11:25 am

1 stop17h 26m

Santa Rosa Sonoma County

Mon 5/18

7:40 pm-1:14 pm

1 stop15h 34m

$333

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 5/12

8:50 am-11:25 am

1 stop28h 35m

Santa Rosa Sonoma County

Sat 5/16

7:40 pm-11:55 pm

1 stop26h 15m

$353
Quickest round-trip

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 5/5

6:00 am-12:21 pm

1 stop8h 21m

Santa Rosa Sonoma County

Wed 5/6

1:13 pm-11:59 pm

1 stop8h 46m

$357

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 5/12

8:48 pm-11:10 am

2 stops16h 22m

Santa Rosa Sonoma County

Wed 5/20

7:01 am-6:50 pm

1 stop9h 49m

$358

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 4/25

5:20 am-3:53 pm

2 stops12h 33m

Santa Rosa Sonoma County

Sat 5/2

12:56 pm-11:59 pm

1 stop9h 03m

$434

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 4/25

5:20 am-3:53 pm

2 stops12h 33m

Santa Rosa Sonoma County

Sat 5/2

12:56 pm-10:57 pm

2 stops8h 01m

$439

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 San Francisco from

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

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 airline that flies from Illinois to Santa Rosa Sonoma County?

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

What airlines fly to Santa Rosa?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Santa Rosa from Illinois according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Santa Rosa. Keep in mind that there are 9 different airlines that fly to Santa Rosa on a routine basis, so you have a few additional options to choose from.

Cheap Illinois to Santa Rosa flight deals and tips

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

Fastest flight time

7h 06m

Direct flights

None
The fastest flight from Illinois to Santa Rosa takes 7h 06m
There are no direct flights from Illinois to Santa Rosa. There are no popular flight routes from Illinois to Santa Rosa.
Search flight deals

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

    Prices for flights from Illinois to Santa Rosa Sonoma County Airport refresh daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Santa Rosa Sonoma County Airport.

  • What documentation or ID do you need to fly to Santa Rosa Sonoma County Airport?

    The required travel and health documents for your Santa Rosa Sonoma County Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Santa Rosa Sonoma County Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Illinois to Santa Rosa

Compare and see reviews for airlines that fly from Illinois to Santa Rosa with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $444Free CancellationRating
7.8
2,841 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $478Free CancellationRating
7.1
11,469 reviews
Search American Airlines flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Fort Bragg
Mendocino
Ukiah
Little River
Point Arena

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Santa Rosa. momondo saves you time and could save you money on your trip.

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

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

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

Once you have performed a search for Illinois to Santa Rosa flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to Santa Rosa, momondo offers a useful price alert feature which will track prices for flights to Santa Rosa from Illinois and alert you when they change.

An easier way to manage your Santa Rosa trip

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