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Cheap flights from Illinois to San Francisco from $119

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 3/24. 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 Illinois to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
4:10 pm - 11:13 pm
ORD
-
STS
9h 03m
1 stop
Alaska Airlines Logo
7:00 am - 6:40 pm
STS
-
ORD
9h 40m
1 stop
$237Alaska Airlines
Tue, Apr 14 - Tue, Apr 21
Alaska Airlines Logo
6:00 am - 12:21 pm
ORD
-
STS
8h 21m
1 stop
Alaska Airlines Logo
7:23 am - 7:03 pm
STS
-
ORD
9h 40m
1 stop
$247Alaska Airlines
Tue, May 5 - Sat, May 9
Alaska Airlines Logo
6:00 am - 12:21 pm
ORD
-
STS
8h 21m
1 stop
Alaska Airlines Logo
7:46 pm - 6:40 am
STS
-
ORD
8h 54m
1 stop
$257Alaska Airlines
Tue, May 5 - Tue, May 5
Alaska Airlines Logo
4:10 pm - 11:13 pm
ORD
-
STS
9h 03m
1 stop
Alaska Airlines Logo
7:00 am - 7:02 pm
STS
-
ORD
10h 02m
1 stop
$260Alaska Airlines
Tue, Apr 7 - Wed, Apr 8
Alaska Airlines Logo
3:52 pm - 11:27 pm
ORD
-
STS
9h 35m
1 stop
Alaska Airlines Logo
7:23 am - 7:03 pm
STS
-
ORD
9h 40m
1 stop
$270Alaska Airlines
Fri, May 1 - Sat, May 9
Alaska Airlines Logo
6:00 am - 12:21 pm
ORD
-
STS
8h 21m
1 stop
Alaska Airlines Logo
7:23 am - 7:03 pm
STS
-
ORD
9h 40m
1 stop
$276Alaska Airlines
Sat, May 2 - Tue, May 12
Alaska Airlines Logo
6:00 am - 12:21 pm
ORD
-
STS
8h 21m
1 stop
Alaska Airlines Logo
7:23 am - 7:03 pm
STS
-
ORD
9h 40m
1 stop
$280Alaska Airlines
Tue, May 5 - Thu, May 7
Alaska Airlines Logo
2:07 pm - 9:14 am
ORD
-
STS
21h 07m
1 stop
Alaska Airlines Logo
8:00 am - 1:11 pm
STS
-
ORD
27h 11m
1 stop
$286Alaska Airlines
Tue, Feb 17 - Tue, Feb 24
Alaska Airlines Logo
4:10 pm - 11:13 pm
ORD
-
STS
9h 03m
1 stop
Alaska Airlines Logo
7:00 am - 11:59 pm
STS
-
ORD
14h 59m
1 stop
$290Alaska Airlines
Tue, Apr 14 - Mon, Apr 20
Alaska Airlines Logo
3:52 pm - 11:27 pm
ORD
-
STS
9h 35m
1 stop
Alaska Airlines Logo
7:23 am - 7:03 pm
STS
-
ORD
9h 40m
1 stop
$293Alaska Airlines
Fri, May 1 - Wed, May 6

Alaska Airlines flights from Illinois to Santa Rosa

Our best Alaska Airlines deals on Illinois to Santa Rosa flight tickets
Alaska Airlines
Apr 14
ORD4:10 pmChicago O'Hare Intl
9h 03m
1 stop
STS11:13 pmSanta Rosa Sonoma County
Apr 21
STS7:00 amSanta Rosa Sonoma County
9h 40m
1 stop
ORD6:40 pmChicago O'Hare Intl
$237
Alaska Airlines
Apr 16
ORD4:10 pmChicago O'Hare Intl
9h 03m
1 stop
STS11:13 pmSanta Rosa Sonoma County
Apr 21
STS7:00 amSanta Rosa Sonoma County
9h 40m
1 stop
ORD6:40 pmChicago O'Hare Intl
$270
Alaska Airlines
Feb 17
ORD2:07 pmChicago O'Hare Intl
21h 07m
1 stop
STS9:14 amSanta Rosa Sonoma County
Feb 24
STS8:00 amSanta Rosa Sonoma County
27h 11m
1 stop
ORD1:11 pmChicago O'Hare Intl
$286

American Airlines flights from Illinois to Santa Rosa

Our best American Airlines deals on Illinois to Santa Rosa flight tickets
American Airlines
Feb 17
ORD5:00 amChicago O'Hare Intl
9h 33m
1 stop
STS12:33 pmSanta Rosa Sonoma County
Feb 21
STS4:17 pmSanta Rosa Sonoma County
6h 34m
1 stop
ORD12:51 amChicago O'Hare Intl
$389
American Airlines
Feb 13
STL7:58 amLambert-St Louis
9h 55m
1 stop
STS3:53 pmSanta Rosa Sonoma County
Feb 16
STS4:23 pmSanta Rosa Sonoma County
15h 17m
2 stops
STL9:40 amLambert-St Louis
$716
American Airlines
Feb 13
STL7:05 amLambert-St Louis
10h 48m
2 stops
STS3:53 pmSanta Rosa Sonoma County
Feb 16
STS4:23 pmSanta Rosa Sonoma County
15h 17m
2 stops
STL9:40 amLambert-St Louis
$796

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 January 28, 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

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 4/14

4:10 pm-11:13 pm

1 stop9h 03m

Santa Rosa Sonoma County

Tue 4/21

7:00 am-6:40 pm

1 stop9h 40m

$237

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

Sat 5/9

7:23 am-7:03 pm

1 stop9h 40m

$247

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

Tue 5/5

7:46 pm-6:40 am

1 stop8h 54m

$257

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 4/7

4:10 pm-11:13 pm

1 stop9h 03m

Santa Rosa Sonoma County

Wed 4/8

7:00 am-7:02 pm

1 stop10h 02m

$260

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

Sat 5/9

7:23 am-7:03 pm

1 stop9h 40m

$270

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 5/2

6:00 am-12:21 pm

1 stop8h 21m

Santa Rosa Sonoma County

Tue 5/12

7:23 am-7:03 pm

1 stop9h 40m

$276

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

Thu 5/7

7:23 am-7:03 pm

1 stop9h 40m

$280

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 2/17

2:07 pm-9:14 am

1 stop21h 07m

Santa Rosa Sonoma County

Tue 2/24

8:00 am-1:11 pm

1 stop27h 11m

$286

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 4/14

4:10 pm-11:13 pm

1 stop9h 03m

Santa Rosa Sonoma County

Mon 4/20

7:00 am-11:59 pm

1 stop14h 59m

$290

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

Wed 5/6

7:23 am-7:03 pm

1 stop9h 40m

$293

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 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 48% of people opting to fly with this airline when traveling to Santa Rosa. Keep in mind that there are 10 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 10m

Direct flights

None
The fastest flight from Illinois to Santa Rosa takes 7h 10m
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
2,830 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $511Free CancellationRating
7.2
11,201 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.

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