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Cheap flights from Illinois to San Francisco from $152

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 8/18. 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 Illinois to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:00 am - 12:05 pm
ORD
-
STS
9h 05m
1 stop
American Airlines Logo
4:20 pm - 12:28 am
STS
-
ORD
6h 08m
1 stop
$303American Airlines
Tue, Jun 9 - Tue, Jun 16
Alaska Airlines Logo
9:00 am - 2:13 pm
ORD
-
STS
7h 13m
1 stop
Alaska Airlines Logo
1:09 pm - 10:59 pm
STS
-
ORD
7h 50m
1 stop
$308Alaska Airlines
Sat, May 30 - Wed, Jun 3
American Airlines Logo
6:00 am - 12:03 pm
ORD
-
STS
8h 03m
1 stop
American Airlines Logo
12:43 pm - 11:37 pm
STS
-
ORD
8h 54m
1 stop
$331American Airlines
Mon, Jun 1 - Wed, Jun 3
Alaska Airlines Logo
2:10 pm - 11:50 pm
ORD
-
STS
11h 40m
1 stop
Alaska Airlines Logo
7:06 am - 6:50 pm
STS
-
ORD
9h 44m
1 stop
$336Alaska Airlines
Thu, Jun 4 - Sat, Jun 6
Alaska Airlines Logo
9:00 am - 2:13 pm
ORD
-
STS
7h 13m
1 stop
Alaska Airlines Logo
7:01 am - 6:50 pm
STS
-
ORD
9h 49m
1 stop
$351Alaska Airlines
Wed, May 27 - Sun, May 31
Alaska Airlines Logo
6:01 am - 2:12 pm
ORD
-
STS
10h 11m
1 stop
Alaska Airlines Logo
7:00 am - 6:04 pm
STS
-
ORD
9h 04m
1 stop
$353Alaska Airlines
Tue, Sep 22 - Wed, Sep 23
American Airlines Logo
6:00 am - 12:03 pm
ORD
-
STS
8h 03m
1 stop
American Airlines Logo
12:43 pm - 12:42 am
STS
-
ORD
9h 59m
1 stop
$356American Airlines
Mon, Jun 1 - Wed, Jun 3
Southwest Logo
5:35 am - 11:20 am
STL
-
STS
7h 45m
1 stop
Southwest Logo
10:30 am - 12:05 am
STS
-
STL
11h 35m
1 stop
$477Southwest
Wed, Sep 2 - Sun, Sep 6
Southwest Logo
2:25 pm - 10:40 pm
STL
-
STS
10h 15m
2 stops
Southwest Logo
3:55 pm - 12:10 am
STS
-
STL
6h 15m
1 stop
$482Southwest
Thu, May 28 - Thu, Jun 4
Southwest Logo
2:25 pm - 10:40 pm
STL
-
STS
10h 15m
2 stops
Southwest Logo
3:55 pm - 1:50 am
STS
-
STL
7h 55m
2 stops
$487Southwest
Thu, May 28 - Thu, Jun 4

American Airlines flights from Illinois to Santa Rosa

Our best American Airlines deals on Illinois to Santa Rosa flight tickets
American Airlines
Jun 9
ORD5:00 amChicago O'Hare Intl
9h 05m
1 stop
STS12:05 pmSanta Rosa Sonoma County
Jun 16
STS4:20 pmSanta Rosa Sonoma County
6h 08m
1 stop
ORD12:28 amChicago O'Hare Intl
$303
American Airlines
Jun 1
ORD6:00 amChicago O'Hare Intl
8h 03m
1 stop
STS12:03 pmSanta Rosa Sonoma County
Jun 3
STS12:43 pmSanta Rosa Sonoma County
8h 54m
1 stop
ORD11:37 pmChicago O'Hare Intl
$331
American Airlines
Jun 1
ORD6:00 amChicago O'Hare Intl
8h 03m
1 stop
STS12:03 pmSanta Rosa Sonoma County
Jun 3
STS12:43 pmSanta Rosa Sonoma County
9h 59m
1 stop
ORD12:42 amChicago O'Hare Intl
$356

Alaska Airlines flights from Illinois to Santa Rosa

Our best Alaska Airlines deals on Illinois to Santa Rosa flight tickets
Alaska Airlines
May 30
ORD9:00 amChicago O'Hare Intl
7h 13m
1 stop
STS2:13 pmSanta Rosa Sonoma County
Jun 3
STS1:09 pmSanta Rosa Sonoma County
7h 50m
1 stop
ORD10:59 pmChicago O'Hare Intl
$308
Alaska Airlines
Jun 4
ORD2:10 pmChicago O'Hare Intl
11h 40m
1 stop
STS11:50 pmSanta Rosa Sonoma County
Jun 6
STS7:06 amSanta Rosa Sonoma County
9h 44m
1 stop
ORD6:50 pmChicago O'Hare Intl
$336
Alaska Airlines
May 27
ORD9:00 amChicago O'Hare Intl
7h 13m
1 stop
STS2:13 pmSanta Rosa Sonoma County
May 31
STS7:01 amSanta Rosa Sonoma County
9h 49m
1 stop
ORD6:50 pmChicago O'Hare Intl
$351

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 May 4, 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

Tue 6/9

5:00 am-12:05 pm

1 stop9h 05m

Santa Rosa Sonoma County

Tue 6/16

4:20 pm-12:28 am

1 stop6h 08m

$303
Quickest round-trip

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 5/30

9:00 am-2:13 pm

1 stop7h 13m

Santa Rosa Sonoma County

Wed 6/3

1:09 pm-10:59 pm

1 stop7h 50m

$308

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 6/1

6:00 am-12:03 pm

1 stop8h 03m

Santa Rosa Sonoma County

Wed 6/3

12:43 pm-11:37 pm

1 stop8h 54m

$331

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Thu 6/4

2:10 pm-11:50 pm

1 stop11h 40m

Santa Rosa Sonoma County

Sat 6/6

7:06 am-6:50 pm

1 stop9h 44m

$336

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Wed 5/27

9:00 am-2:13 pm

1 stop7h 13m

Santa Rosa Sonoma County

Sun 5/31

7:01 am-6:50 pm

1 stop9h 49m

$351

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 9/22

6:01 am-2:12 pm

1 stop10h 11m

Santa Rosa Sonoma County

Wed 9/23

7:00 am-6:04 pm

1 stop9h 04m

$353

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 6/1

6:00 am-12:03 pm

1 stop8h 03m

Santa Rosa Sonoma County

Wed 6/3

12:43 pm-12:42 am

1 stop9h 59m

$356

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 9/2

5:35 am-11:20 am

1 stop7h 45m

Santa Rosa Sonoma County

Sun 9/6

10:30 am-12:05 am

1 stop11h 35m

$477

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Thu 5/28

2:25 pm-10:40 pm

2 stops10h 15m

Santa Rosa Sonoma County

Thu 6/4

3:55 pm-12:10 am

1 stop6h 15m

$482

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Thu 5/28

2:25 pm-10:40 pm

2 stops10h 15m

Santa Rosa Sonoma County

Thu 6/4

3:55 pm-1:50 am

2 stops7h 55m

$487

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 month to fly to Santa Rosa?

If you are unable to visit Santa Rosa during the month of August, then departing from Illinois during the month December is also very affordable. Most momondo users find prices during this month for around $239.

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

6h 45m

Direct flights

None
The fastest flight from Illinois to Santa Rosa takes 6h 45m
There are no direct flights from Illinois to Santa Rosa. There are no popular flight routes from Illinois to Santa Rosa.
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Frequently asked questions about flying from Illinois to Santa Rosa

  • 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
American AirlinesPriceFrom $478Free CancellationRating
7.1
11,670 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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