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Cheap flights from Illinois to San Francisco from $149

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 1/5. 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
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
Alaska Airlines Logo
6:52 pm - 2:29 pm
STS
-
ORD
17h 37m1 stop
$290Alaska Airlines
Fri, Jan 23 - Mon, Jan 26
Alaska Airlines Logo
8:00 am - 8:58 am
ORD
-
STS
26h 58m2 stops
Alaska Airlines Logo
6:50 pm - 2:05 pm
STS
-
ORD
17h 15m2 stops
$293Alaska Airlines
Sat, Feb 7 - Sat, Feb 14
Alaska Airlines Logo
8:00 am - 8:58 am
ORD
-
STS
26h 58m2 stops
Alaska Airlines Logo
9:38 am - 11:37 pm
STS
-
ORD
11h 59m1 stop
$296Alaska Airlines
Sat, Jan 10 - Fri, Jan 30
Alaska Airlines Logo
9:00 am - 2:29 pm
ORD
-
STS
7h 29m1 stop
Alaska Airlines Logo
6:50 pm - 11:56 pm
STS
-
ORD
27h 06m2 stops
$308Alaska Airlines
Sat, Feb 7 - Sat, Feb 14
Alaska Airlines Logo
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
Alaska Airlines Logo
9:33 pm - 5:10 pm
STS
-
ORD
17h 37m1 stop
$310Alaska Airlines
Fri, Jan 23 - Sun, Jan 25
Alaska Airlines Logo
9:00 am - 2:29 pm
ORD
-
STS
7h 29m1 stop
Alaska Airlines Logo
7:57 pm - 2:05 pm
STS
-
ORD
16h 08m1 stop
$322Alaska Airlines
Sat, Feb 7 - Sat, Feb 14
Alaska Airlines Logo
8:00 am - 10:35 am
ORD
-
STS
28h 35m1 stop
Alaska Airlines Logo
6:50 am - 11:50 pm
STS
-
ORD
15h 00m2 stops
$323Alaska Airlines
Sat, Jan 10 - Tue, Jan 13
Alaska Airlines Logo
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
Alaska Airlines Logo
9:33 pm - 11:50 pm
STS
-
ORD
24h 17m1 stop
$326Alaska Airlines
Thu, Jan 15 - Mon, Jan 19
Alaska Airlines Logo
9:00 am - 2:29 pm
ORD
-
STS
7h 29m1 stop
Alaska Airlines Logo
6:50 am - 11:50 pm
STS
-
ORD
15h 00m2 stops
$328Alaska Airlines
Sat, Jan 10 - Tue, Jan 13
Alaska Airlines Logo
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
Alaska Airlines Logo
6:30 pm - 1:10 pm
STS
-
ORD
16h 40m1 stop
$330Alaska Airlines
Fri, Jan 9 - Sun, Jan 11

American Airlines flights from Illinois to Santa Rosa

Our best American Airlines deals on Illinois to Santa Rosa flight tickets
American Airlines
Jan 18
ORD5:00 amChicago O'Hare Intl
9h 25m
1 stop
STS12:25 pmSanta Rosa Sonoma County
Jan 27
STS12:55 pmSanta Rosa Sonoma County
9h 28m
1 stop
ORD12:23 amChicago O'Hare Intl
$360
Find similar
American Airlines
Dec 20
ORD8:15 amChicago O'Hare Intl
9h 36m
1 stop
STS3:51 pmSanta Rosa Sonoma County
Dec 31
STS12:59 pmSanta Rosa Sonoma County
9h 17m
1 stop
ORD12:16 amChicago O'Hare Intl
$644
Find similar
American Airlines
Dec 19
ORD5:21 amChicago O'Hare Intl
12h 30m
2 stops
STS3:51 pmSanta Rosa Sonoma County
Dec 31
STS12:59 pmSanta Rosa Sonoma County
19h 32m
2 stops
ORD10:31 amChicago O'Hare Intl
$790
Find similar

Alaska Airlines flights from Illinois to Santa Rosa

Our best Alaska Airlines deals on Illinois to Santa Rosa flight tickets
Alaska Airlines
Jan 23
ORD3:44 pmChicago O'Hare Intl
9h 27m
1 stop
STS11:11 pmSanta Rosa Sonoma County
Jan 26
STS6:52 pmSanta Rosa Sonoma County
17h 37m
1 stop
ORD2:29 pmChicago O'Hare Intl
$290
Find similar
Alaska Airlines
Feb 7
ORD8:00 amChicago O'Hare Intl
26h 58m
2 stops
STS8:58 amSanta Rosa Sonoma County
Feb 14
STS6:50 pmSanta Rosa Sonoma County
17h 15m
2 stops
ORD2:05 pmChicago O'Hare Intl
$293
Find similar
Alaska Airlines
Jan 10
ORD8:00 amChicago O'Hare Intl
26h 58m
2 stops
STS8:58 amSanta Rosa Sonoma County
Jan 30
STS9:38 amSanta Rosa Sonoma County
11h 59m
1 stop
ORD11:37 pmChicago O'Hare Intl
$296
Find similar

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 December 11, 2025.
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

Fri 1/23

3:44 pm-11:11 pm

1 stop9h 27m

Santa Rosa Sonoma County

Mon 1/26

6:52 pm-2:29 pm

1 stop17h 37m

$290

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 2/7

8:00 am-8:58 am

2 stops26h 58m

Santa Rosa Sonoma County

Sat 2/14

6:50 pm-2:05 pm

2 stops17h 15m

$293

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 1/10

8:00 am-8:58 am

2 stops26h 58m

Santa Rosa Sonoma County

Fri 1/30

9:38 am-11:37 pm

1 stop11h 59m

$296

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 2/7

9:00 am-2:29 pm

1 stop7h 29m

Santa Rosa Sonoma County

Sat 2/14

6:50 pm-11:56 pm

2 stops27h 06m

$308

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Fri 1/23

3:44 pm-11:11 pm

1 stop9h 27m

Santa Rosa Sonoma County

Sun 1/25

9:33 pm-5:10 pm

1 stop17h 37m

$310

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 2/7

9:00 am-2:29 pm

1 stop7h 29m

Santa Rosa Sonoma County

Sat 2/14

7:57 pm-2:05 pm

1 stop16h 08m

$322

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 1/10

8:00 am-10:35 am

1 stop28h 35m

Santa Rosa Sonoma County

Tue 1/13

6:50 am-11:50 pm

2 stops15h 00m

$323

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Thu 1/15

3:44 pm-11:11 pm

1 stop9h 27m

Santa Rosa Sonoma County

Mon 1/19

9:33 pm-11:50 pm

1 stop24h 17m

$326

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 1/10

9:00 am-2:29 pm

1 stop7h 29m

Santa Rosa Sonoma County

Tue 1/13

6:50 am-11:50 pm

2 stops15h 00m

$328

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Fri 1/9

3:44 pm-11:11 pm

1 stop9h 27m

Santa Rosa Sonoma County

Sun 1/11

6:30 pm-1:10 pm

1 stop16h 40m

$330

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 January, then departing from Illinois during the month November is also very affordable. Most momondo users find prices during this month for around $343.

What is the cheapest day to depart on your flight to Santa Rosa?

Our data shows that Tuesday is the least expensive day to fly to Santa Rosa. Tickets to fly out on this day can be as low as $517. On the other hand, Monday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $703.

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

Our data shows that the cheapest Illinois to Santa Rosa flights are usually those with departure times in the evening. Our users have found flights to Santa Rosa in the evening for as low as $453. Flights in the morning are often more expensive with an average ticket price of $577.

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

8h 32m

Direct flights

None
The fastest flight from Illinois to Santa Rosa takes 8h 32m
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
American AirlinesPriceFrom $384Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
Hawaiian AirlinesPriceFrom $444Free CancellationRating
7.8
2,818 reviews
Search Hawaiian 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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