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Cheap flights from Santa Rosa to Illinois from $146

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Santa Rosa to Illinois departing on 2/5. 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 Santa Rosa to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
10:51 am - 11:59 pm
STS
-
ORD
11h 08m1 stop
Alaska Airlines Logo
8:20 am - 7:02 pm
ORD
-
STS
12h 42m1 stop
$279Alaska Airlines
Sat, Feb 21 - Wed, Feb 25
Alaska Airlines Logo
2:30 pm - 11:37 pm
STS
-
ORD
7h 07m1 stop
Alaska Airlines Logo
6:06 pm - 12:22 pm
ORD
-
STS
20h 16m2 stops
$286Alaska Airlines
Tue, Jan 27 - Mon, Feb 2
Alaska Airlines Logo
2:30 pm - 11:37 pm
STS
-
ORD
7h 07m1 stop
Alaska Airlines Logo
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
$288Alaska Airlines
Tue, Feb 3 - Thu, Feb 5
Alaska Airlines Logo
2:30 pm - 11:37 pm
STS
-
ORD
7h 07m1 stop
Alaska Airlines Logo
9:00 am - 2:29 pm
ORD
-
STS
7h 29m1 stop
$289Alaska Airlines
Tue, Jan 27 - Sun, Feb 1
Alaska Airlines Logo
9:38 am - 2:29 pm
STS
-
ORD
26h 51m1 stop
Alaska Airlines Logo
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
$290Alaska Airlines
Mon, Feb 2 - Thu, Feb 5
Alaska Airlines Logo
6:50 am - 5:10 pm
STS
-
ORD
8h 20m2 stops
Alaska Airlines Logo
8:00 am - 12:22 pm
ORD
-
STS
30h 22m2 stops
$293Alaska Airlines
Tue, Jan 27 - Mon, Feb 2
Alaska Airlines Logo
6:50 am - 5:10 pm
STS
-
ORD
8h 20m2 stops
Alaska Airlines Logo
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
$295Alaska Airlines
Mon, Feb 2 - Thu, Feb 5
Alaska Airlines Logo
6:50 am - 11:50 pm
STS
-
ORD
15h 00m2 stops
Alaska Airlines Logo
3:44 pm - 11:11 pm
ORD
-
STS
9h 27m1 stop
$296Alaska Airlines
Tue, Jan 27 - Sun, Feb 1
Alaska Airlines Logo
6:52 pm - 2:29 pm
STS
-
ORD
17h 37m1 stop
Alaska Airlines Logo
8:00 am - 12:22 pm
ORD
-
STS
30h 22m2 stops
$298Alaska Airlines
Thu, Jan 8 - Mon, Jan 12
Alaska Airlines Logo
6:52 pm - 2:29 pm
STS
-
ORD
17h 37m1 stop
Alaska Airlines Logo
9:00 am - 2:29 pm
ORD
-
STS
7h 29m1 stop
$300Alaska Airlines
Thu, Jan 29 - Sun, Feb 1

Alaska Airlines flights from Santa Rosa to Illinois

Our best Alaska Airlines deals on Santa Rosa to Illinois flight tickets
Alaska Airlines
Feb 21
STS10:51 amSanta Rosa Sonoma County
11h 08m
1 stop
ORD11:59 pmChicago O'Hare Intl
Feb 25
ORD8:20 amChicago O'Hare Intl
12h 42m
1 stop
STS7:02 pmSanta Rosa Sonoma County
$279
Find similar
Alaska Airlines
Jan 27
STS2:30 pmSanta Rosa Sonoma County
7h 07m
1 stop
ORD11:37 pmChicago O'Hare Intl
Feb 2
ORD6:06 pmChicago O'Hare Intl
20h 16m
2 stops
STS12:22 pmSanta Rosa Sonoma County
$286
Find similar
Alaska Airlines
Feb 3
STS2:30 pmSanta Rosa Sonoma County
7h 07m
1 stop
ORD11:37 pmChicago O'Hare Intl
Feb 5
ORD3:44 pmChicago O'Hare Intl
9h 27m
1 stop
STS11:11 pmSanta Rosa Sonoma County
$288
Find similar

American Airlines flights from Santa Rosa to Illinois

Our best American Airlines deals on Santa Rosa to Illinois flight tickets
American Airlines
Feb 21
STS1:00 pmSanta Rosa Sonoma County
6h 09m
1 stop
ORD9:09 pmChicago O'Hare Intl
Feb 25
ORD5:00 amChicago O'Hare Intl
9h 30m
1 stop
STS12:30 pmSanta Rosa Sonoma County
$399
Find similar
American Airlines
Jan 1
STS4:21 pmSanta Rosa Sonoma County
5h 30m
1 stop
STL11:51 pmLambert-St Louis
Jan 5
STL8:00 amLambert-St Louis
6h 29m
1 stop
STS12:29 pmSanta Rosa Sonoma County
$534
Find similar
American Airlines
Jan 1
STS4:21 pmSanta Rosa Sonoma County
5h 30m
1 stop
STL11:51 pmLambert-St Louis
Jan 5
STL7:05 amLambert-St Louis
10h 46m
2 stops
STS3:51 pmSanta Rosa Sonoma County
$539
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Santa Rosa to Illinois 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 18, 2025.
Use the filters below to find and compare flights from Santa Rosa to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Sat 2/21

10:51 am-11:59 pm

1 stop11h 08m

Chicago O'Hare Intl

Wed 2/25

8:20 am-7:02 pm

1 stop12h 42m

$279

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 1/27

2:30 pm-11:37 pm

1 stop7h 07m

Chicago O'Hare Intl

Mon 2/2

6:06 pm-12:22 pm

2 stops20h 16m

$286

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 2/3

2:30 pm-11:37 pm

1 stop7h 07m

Chicago O'Hare Intl

Thu 2/5

3:44 pm-11:11 pm

1 stop9h 27m

$288

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 1/27

2:30 pm-11:37 pm

1 stop7h 07m

Chicago O'Hare Intl

Sun 2/1

9:00 am-2:29 pm

1 stop7h 29m

$289

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 2/2

9:38 am-2:29 pm

1 stop26h 51m

Chicago O'Hare Intl

Thu 2/5

3:44 pm-11:11 pm

1 stop9h 27m

$290

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 1/27

6:50 am-5:10 pm

2 stops8h 20m

Chicago O'Hare Intl

Mon 2/2

8:00 am-12:22 pm

2 stops30h 22m

$293

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 2/2

6:50 am-5:10 pm

2 stops8h 20m

Chicago O'Hare Intl

Thu 2/5

3:44 pm-11:11 pm

1 stop9h 27m

$295

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 1/27

6:50 am-11:50 pm

2 stops15h 00m

Chicago O'Hare Intl

Sun 2/1

3:44 pm-11:11 pm

1 stop9h 27m

$296

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Thu 1/8

6:52 pm-2:29 pm

1 stop17h 37m

Chicago O'Hare Intl

Mon 1/12

8:00 am-12:22 pm

2 stops30h 22m

$298

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Thu 1/29

6:52 pm-2:29 pm

1 stop17h 37m

Chicago O'Hare Intl

Sun 2/1

9:00 am-2:29 pm

1 stop7h 29m

$300

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 Illinois from

How to get the cheapest flight ticket from Santa Rosa to Illinois

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 day to depart on your flight to Illinois?

The cheapest day to depart from Santa Rosa to Illinois is on a Friday when prices can be found for as low as $411. Flights from Santa Rosa to Illinois on a Sunday will generally be more expensive and average around $778. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Santa Rosa to Illinois during this time can be as low as $545. Flights in the morning are often more expensive with an average ticket price of $577.

Cheap Santa Rosa to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Santa Rosa to Illinois

Fastest flight time

6h 45m

Direct flights

None
The fastest flight from Santa Rosa to Illinois takes 6h 45m
There are no direct flights from Santa Rosa to Illinois. There are no popular flight routes from Santa Rosa to Illinois.
Search flight deals

  • When did momondo last update prices for flights from Santa Rosa Sonoma County Airport to Illinois?

    Prices for flights from Santa Rosa Sonoma County Airport to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Santa Rosa Sonoma County Airport to Illinois?

  • How old do you have to be to fly from Santa Rosa Sonoma County Airport to Illinois?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Santa Rosa Sonoma County Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Santa Rosa to Illinois

Compare and see reviews for airlines that fly from Santa Rosa to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $292Free CancellationRating
8.0
11,474 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $316Free CancellationRating
7.2
11,053 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Santa Rosa to Illinois?

Finding the right flight to Illinois from Santa Rosa is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Santa Rosa to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Santa Rosa to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Santa Rosa to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Santa Rosa to Illinois.

I’m not ready to book a flight from Santa Rosa to Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Santa Rosa to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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