Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to San Francisco from $123

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 10/6. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
7:20 am - 2:12 pm
ORD
-
STS
8h 52m
1 stop
Alaska Airlines Logo
10:34 am - 7:21 pm
STS
-
ORD
6h 47m
1 stop
$299Alaska Airlines
Sat, Sep 19 - Tue, Sep 22
Alaska Airlines Logo
6:00 am - 12:46 pm
ORD
-
STS
8h 46m
1 stop
Alaska Airlines Logo
10:34 am - 7:21 pm
STS
-
ORD
6h 47m
1 stop
$299Alaska Airlines
Sat, Sep 19 - Tue, Sep 22
American Airlines Logo
6:59 am - 12:28 pm
ORD
-
STS
7h 29m
1 stop
American Airlines Logo
12:58 pm - 11:30 pm
STS
-
ORD
8h 32m
1 stop
$299American Airlines
Mon, Aug 31 - Sat, Sep 5
American Airlines Logo
6:00 am - 12:09 pm
ORD
-
STS
8h 09m
1 stop
American Airlines Logo
1:08 pm - 10:31 pm
STS
-
ORD
7h 23m
1 stop
$299American Airlines
Sat, Sep 26 - Sat, Oct 3
Alaska Airlines Logo
2:54 pm - 10:53 pm
ORD
-
STS
9h 59m
1 stop
Alaska Airlines Logo
3:00 pm - 11:41 pm
STS
-
ORD
6h 41m
1 stop
$299Alaska Airlines
Mon, Dec 14 - Tue, Jan 5
Alaska Airlines Logo
4:08 pm - 9:59 pm
ORD
-
STS
7h 51m
1 stop
Alaska Airlines Logo
10:34 am - 7:21 pm
STS
-
ORD
6h 47m
1 stop
$299Alaska Airlines
Sat, Sep 12 - Tue, Sep 22
American Airlines Logo
5:00 am - 12:09 pm
ORD
-
STS
9h 09m
1 stop
American Airlines Logo
1:08 pm - 10:31 pm
STS
-
ORD
7h 23m
1 stop
$302American Airlines
Sat, Sep 5 - Fri, Sep 11
Delta Logo
9:59 am - 4:06 pm
ORD
-
STS
8h 07m
2 stops
Delta Logo
7:00 am - 5:57 pm
STS
-
ORD
8h 57m
1 stop
$304Delta
Tue, Dec 15 - Wed, Jan 6
Delta Logo
1:35 pm - 9:48 pm
ORD
-
STS
10h 13m
2 stops
Delta Logo
7:00 am - 5:57 pm
STS
-
ORD
8h 57m
1 stop
$304Delta
Thu, Jan 14 - Thu, Jan 21
Delta Logo
9:59 am - 4:06 pm
ORD
-
STS
8h 07m
2 stops
Delta Logo
12:39 pm - 9:53 pm
STS
-
ORD
7h 14m
1 stop
$304Delta
Tue, Dec 15 - Tue, Jan 5

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Alaska Airlines flights from Illinois to Santa Rosa

Our best Alaska Airlines deals on Illinois to Santa Rosa flight tickets
Alaska Airlines
Sep 1
ORD6:01 amChicago O'Hare Intl
19h 53m
1 stop
STS11:54 pmSanta Rosa Sonoma County
Sep 2
STS6:13 amSanta Rosa Sonoma County
11h 08m
1 stop
ORD7:21 pmChicago O'Hare Intl
$303
Alaska Airlines
Aug 29
ORD2:18 pmChicago O'Hare Intl
21h 36m
1 stop
STS9:54 amSanta Rosa Sonoma County
Sep 5
STS6:13 amSanta Rosa Sonoma County
11h 08m
1 stop
ORD7:21 pmChicago O'Hare Intl
$313
Alaska Airlines
Sep 10
ORD8:00 amChicago O'Hare Intl
15h 59m
1 stop
STS9:59 pmSanta Rosa Sonoma County
Sep 14
STS6:13 amSanta Rosa Sonoma County
11h 08m
1 stop
ORD7:21 pmChicago O'Hare Intl
$319

Delta flights from Illinois to Santa Rosa

Our best Delta deals on Illinois to Santa Rosa flight tickets
Delta
Dec 15
ORD9:59 amChicago O'Hare Intl
8h 07m
2 stops
STS4:06 pmSanta Rosa Sonoma County
Jan 5
STS12:39 pmSanta Rosa Sonoma County
7h 14m
1 stop
ORD9:53 pmChicago O'Hare Intl
$304
Delta
Jan 14
ORD1:35 pmChicago O'Hare Intl
10h 13m
2 stops
STS9:48 pmSanta Rosa Sonoma County
Jan 21
STS7:00 amSanta Rosa Sonoma County
11h 37m
2 stops
ORD8:37 pmChicago O'Hare Intl
$309
Delta
Jan 14
ORD7:30 amChicago O'Hare Intl
6h 24m
1 stop
STS11:54 amSanta Rosa Sonoma County
Jan 21
STS12:39 pmSanta Rosa Sonoma County
7h 14m
1 stop
ORD9:53 pmChicago O'Hare Intl
$329

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 August 1, 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

Sat 9/19

7:20 am-2:12 pm

1 stop8h 52m

Santa Rosa Sonoma County

Tue 9/22

10:34 am-7:21 pm

1 stop6h 47m

$299

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 9/19

6:00 am-12:46 pm

1 stop8h 46m

Santa Rosa Sonoma County

Tue 9/22

10:34 am-7:21 pm

1 stop6h 47m

$299

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 8/31

6:59 am-12:28 pm

1 stop7h 29m

Santa Rosa Sonoma County

Sat 9/5

12:58 pm-11:30 pm

1 stop8h 32m

$299

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 9/26

6:00 am-12:09 pm

1 stop8h 09m

Santa Rosa Sonoma County

Sat 10/3

1:08 pm-10:31 pm

1 stop7h 23m

$299

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Mon 12/14

2:54 pm-10:53 pm

1 stop9h 59m

Santa Rosa Sonoma County

Tue 1/5

3:00 pm-11:41 pm

1 stop6h 41m

$299
Quickest round-trip

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 9/12

4:08 pm-9:59 pm

1 stop7h 51m

Santa Rosa Sonoma County

Tue 9/22

10:34 am-7:21 pm

1 stop6h 47m

$299

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Sat 9/5

5:00 am-12:09 pm

1 stop9h 09m

Santa Rosa Sonoma County

Fri 9/11

1:08 pm-10:31 pm

1 stop7h 23m

$302

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 12/15

9:59 am-4:06 pm

2 stops8h 07m

Santa Rosa Sonoma County

Wed 1/6

7:00 am-5:57 pm

1 stop8h 57m

$304

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Thu 1/14

1:35 pm-9:48 pm

2 stops10h 13m

Santa Rosa Sonoma County

Thu 1/21

7:00 am-5:57 pm

1 stop8h 57m

$304

ChicagoSanta Rosa

ORD - STS

ORDSTS

Chicago O'Hare Intl

Tue 12/15

9:59 am-4:06 pm

2 stops8h 07m

Santa Rosa Sonoma County

Tue 1/5

12:39 pm-9:53 pm

1 stop7h 14m

$304

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 December, then departing from Illinois during the month March is also very affordable. Most momondo users find prices during this month for around $428.

Can stopping save me money on Illinois to Santa Rosa flights?

You could potentially save up to 48% on your flight if you consider stops on a Illinois to Santa Rosa flight.

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

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
Alaska AirlinesPriceFrom $285Free CancellationRating
7.9
12,742 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $412Free CancellationRating
7.1
11,845 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
Ukiah
Mendocino
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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 8/31
Mon 9/7
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States