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Cheap flights from Illinois to San Francisco from $126

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 12/9. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
9:00 am - 2:29 pmORD-STS
7h 29m1 stop
Alaska Airlines Logo
2:30 pm - 11:37 pmSTS-ORD
7h 07m1 stop
$260Alaska Airlines
Find Deal
Thu, Jan 15 - Tue, Jan 20
Alaska Airlines Logo
8:59 pm - 10:54 pmORD-STS
27h 55m1 stop
Alaska Airlines Logo
8:00 am - 7:54 pmSTS-ORD
9h 54m1 stop
$269Alaska Airlines
Find Deal
Mon, Dec 8 - Tue, Dec 16
Alaska Airlines Logo
3:05 pm - 10:54 pmORD-STS
9h 49m1 stop
Alaska Airlines Logo
6:58 pm - 11:50 pmSTS-ORD
26h 52m1 stop
$270Alaska Airlines
Find Deal
Wed, Dec 10 - Sat, Dec 13
Alaska Airlines Logo
2:54 pm - 11:57 pmORD-STS
11h 03m1 stop
Alaska Airlines Logo
6:43 pm - 11:50 pmSTS-ORD
27h 07m1 stop
$272Alaska Airlines
Find Deal
Tue, Nov 18 - Wed, Dec 3
Alaska Airlines Logo
2:59 pm - 10:46 pmORD-STS
9h 47m1 stop
Alaska Airlines Logo
6:58 am - 1:59 pmSTS-ORD
29h 01m1 stop
$276Alaska Airlines
Find Deal
Mon, Mar 2 - Fri, Mar 6
Alaska Airlines Logo
9:20 am - 4:02 pmORD-STS
8h 42m1 stop
Alaska Airlines Logo
6:43 pm - 11:50 pmSTS-ORD
27h 07m1 stop
$287Alaska Airlines
Find Deal
Tue, Nov 18 - Thu, Dec 4
Alaska Airlines Logo
3:05 pm - 10:54 pmORD-STS
9h 49m1 stop
Alaska Airlines Logo
7:55 pm - 6:21 amSTS-ORD
8h 26m1 stop
$291Alaska Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Alaska Airlines Logo
9:00 am - 2:29 pmORD-STS
7h 29m1 stop
Alaska Airlines Logo
6:52 pm - 11:37 pmSTS-ORD
26h 45m1 stop
$296Alaska Airlines
Find Deal
Thu, Jan 15 - Mon, Jan 19
American Airlines Logo
7:00 am - 12:07 pmSTL-STS
7h 07m1 stop
American Airlines Logo
1:18 pm - 10:58 pmSTS-STL
7h 40m1 stop
$623American Airlines
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Tue, Nov 11 - Tue, Nov 18
American Airlines Logo
7:00 am - 12:48 pmSTL-STS
7h 48m1 stop
American Airlines Logo
1:18 pm - 10:58 pmSTS-STL
7h 40m1 stop
$728American Airlines
Find Deal
Wed, Nov 12 - Mon, Nov 17

Alaska Airlines flights from Illinois to Santa Rosa

Our best Alaska Airlines deals on Illinois to Santa Rosa flight tickets
Alaska Airlines
Jan 15
ORD9:00 amChicago O'Hare Intl
7h 29m
1 stop
STS2:29 pmSanta Rosa Sonoma County
Jan 20
STS2:30 pmSanta Rosa Sonoma County
7h 07m
1 stop
ORD11:37 pmChicago O'Hare Intl
$260
Find similar
Alaska Airlines
Dec 8
ORD8:59 pmChicago O'Hare Intl
27h 55m
1 stop
STS10:54 pmSanta Rosa Sonoma County
Dec 16
STS8:00 amSanta Rosa Sonoma County
9h 54m
1 stop
ORD7:54 pmChicago O'Hare Intl
$269
Find similar
Alaska Airlines
Dec 10
ORD3:05 pmChicago O'Hare Intl
9h 49m
1 stop
STS10:54 pmSanta Rosa Sonoma County
Dec 13
STS6:58 pmSanta Rosa Sonoma County
26h 52m
1 stop
ORD11:50 pmChicago O'Hare Intl
$270
Find similar

American Airlines flights from Illinois to Santa Rosa

Our best American Airlines deals on Illinois to Santa Rosa flight tickets
American Airlines
Nov 11
STL7:00 amLambert-St Louis
7h 07m
1 stop
STS12:07 pmSanta Rosa Sonoma County
Nov 18
STS1:18 pmSanta Rosa Sonoma County
7h 40m
1 stop
STL10:58 pmLambert-St Louis
$623
Find similar
American Airlines
Nov 12
STL7:00 amLambert-St Louis
7h 48m
1 stop
STS12:48 pmSanta Rosa Sonoma County
Nov 17
STS1:18 pmSanta Rosa Sonoma County
7h 40m
1 stop
STL10:58 pmLambert-St Louis
$728
Find similar
American Airlines
Nov 26
STL7:00 amLambert-St Louis
7h 48m
1 stop
STS12:48 pmSanta Rosa Sonoma County
Dec 1
STS1:18 pmSanta Rosa Sonoma County
7h 16m
1 stop
STL10:34 pmLambert-St Louis
$813
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 October 29, 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

Thu 1/15

9:00 am-2:29 pm

1 stop7h 29m

Santa Rosa Sonoma County

Tue 1/20

2:30 pm-11:37 pm

1 stop7h 07m

$260

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 12/8

8:59 pm-10:54 pm

1 stop27h 55m

Santa Rosa Sonoma County

Tue 12/16

8:00 am-7:54 pm

1 stop9h 54m

$269

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Wed 12/10

3:05 pm-10:54 pm

1 stop9h 49m

Santa Rosa Sonoma County

Sat 12/13

6:58 pm-11:50 pm

1 stop26h 52m

$270

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 11/18

2:54 pm-11:57 pm

1 stop11h 03m

Santa Rosa Sonoma County

Wed 12/3

6:43 pm-11:50 pm

1 stop27h 07m

$272

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 3/2

2:59 pm-10:46 pm

1 stop9h 47m

Santa Rosa Sonoma County

Fri 3/6

6:58 am-1:59 pm

1 stop29h 01m

$276

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 11/18

9:20 am-4:02 pm

1 stop8h 42m

Santa Rosa Sonoma County

Thu 12/4

6:43 pm-11:50 pm

1 stop27h 07m

$287

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Fri 12/5

3:05 pm-10:54 pm

1 stop9h 49m

Santa Rosa Sonoma County

Sun 12/7

7:55 pm-6:21 am

1 stop8h 26m

$291

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Thu 1/15

9:00 am-2:29 pm

1 stop7h 29m

Santa Rosa Sonoma County

Mon 1/19

6:52 pm-11:37 pm

1 stop26h 45m

$296

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Tue 11/11

7:00 am-12:07 pm

1 stop7h 07m

Santa Rosa Sonoma County

Tue 11/18

1:18 pm-10:58 pm

1 stop7h 40m

$623

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 11/12

7:00 am-12:48 pm

1 stop7h 48m

Santa Rosa Sonoma County

Mon 11/17

1:18 pm-10:58 pm

1 stop7h 40m

$728

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

Direct flights

None
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
11,032 reviews
Search American Airlines flights
Hawaiian AirlinesPriceFrom $444Free CancellationRating
7.8
2,796 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.

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