What airlines fly to Illinois?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Santa Rosa according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 9 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Santa Rosa Sonoma County to Illinois?

Southwest and Alaska Airlines are the most popular carriers operating from Santa Rosa Sonoma County to Illinois

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?

There is 1 operator available for flights from Santa Rosa Sonoma County Airport to Illinois as of May 2026.

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.

$150 Cheap Flights from Santa Rosa to Illinois in 2026

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

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

Trusted and free

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

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Santa Rosa to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:12 pm - 12:51 am

STS

ORD

6h 39m

1 stop

6:04 am - 12:03 pm

ORD

STS

7h 59m

1 stop

$323American Airlines

Wed, Jul 8 - Wed, Jul 15

7:06 am - 6:50 pm

STS

ORD

9h 44m

1 stop

9:00 am - 2:13 pm

ORD

STS

7h 13m

1 stop

$336Alaska Airlines

Sat, Jun 6 - Mon, Jun 8

4:20 pm - 12:28 am

STS

ORD

6h 08m

1 stop

5:00 am - 12:05 pm

ORD

STS

9h 05m

1 stop

$340American Airlines

Mon, Jun 8 - Tue, Jun 16

4:20 pm - 12:28 am

STS

ORD

6h 08m

1 stop

5:00 am - 12:05 pm

ORD

STS

9h 05m

1 stop

$341American Airlines

Thu, Jun 4 - Tue, Jun 16

7:06 am - 6:50 pm

STS

ORD

9h 44m

1 stop

9:00 am - 2:13 pm

ORD

STS

7h 13m

1 stop

$356Alaska Airlines

Sat, Jun 6 - Mon, Jun 8

2:52 pm - 11:41 pm

STS

ORD

6h 49m

1 stop

6:00 am - 12:46 pm

ORD

STS

8h 46m

1 stop

$359Alaska Airlines

Tue, Sep 1 - Thu, Sep 10

12:45 pm - 11:32 pm

STS

ORD

8h 47m

1 stop

5:59 am - 12:05 pm

ORD

STS

8h 06m

1 stop

$361American Airlines

Fri, Jun 5 - Tue, Jun 16

3:55 pm - 1:55 am

STS

STL

8h 00m

1 stop

5:35 am - 11:05 am

STL

STS

7h 30m

1 stop

$482Southwest

Thu, Jun 25 - Wed, Jul 1

6:00 am - 7:05 pm

STS

STL

11h 05m

2 stops

5:35 am - 11:05 am

STL

STS

7h 30m

1 stop

$487Southwest

Thu, Jun 25 - Wed, Jul 1

6:00 am - 7:05 pm

STS

STL

11h 05m

2 stops

3:05 pm - 10:45 pm

STL

STS

9h 40m

2 stops

$492Southwest

Thu, Jun 25 - Wed, Jul 1

American Airlines flights from Santa Rosa to Illinois

Our best American Airlines deals on Santa Rosa to Illinois flight tickets

American Airlines

Jul 8

STS4:12 pmSanta Rosa Sonoma County

6h 39m

1 stop

ORD12:51 amChicago O'Hare Intl

Jul 15

ORD6:04 amChicago O'Hare Intl

7h 59m

1 stop

STS12:03 pmSanta Rosa Sonoma County

$323

American Airlines

Jun 8

STS4:20 pmSanta Rosa Sonoma County

6h 08m

1 stop

ORD12:28 amChicago O'Hare Intl

Jun 16

ORD5:00 amChicago O'Hare Intl

9h 05m

1 stop

STS12:05 pmSanta Rosa Sonoma County

$340

American Airlines

Jun 4

STS4:20 pmSanta Rosa Sonoma County

6h 08m

1 stop

ORD12:28 amChicago O'Hare Intl

Jun 16

ORD5:00 amChicago O'Hare Intl

9h 05m

1 stop

STS12:05 pmSanta Rosa Sonoma County

$341

Alaska Airlines flights from Santa Rosa to Illinois

Our best Alaska Airlines deals on Santa Rosa to Illinois flight tickets

Alaska Airlines

Jun 6

STS7:06 amSanta Rosa Sonoma County

9h 44m

1 stop

ORD6:50 pmChicago O'Hare Intl

Jun 8

ORD9:00 amChicago O'Hare Intl

7h 13m

1 stop

STS2:13 pmSanta Rosa Sonoma County

$336

Alaska Airlines

Jun 6

STS7:06 amSanta Rosa Sonoma County

9h 44m

1 stop

ORD6:50 pmChicago O'Hare Intl

Jun 8

ORD9:00 amChicago O'Hare Intl

7h 13m

1 stop

STS2:13 pmSanta Rosa Sonoma County

$356

Alaska Airlines

Sep 1

STS2:52 pmSanta Rosa Sonoma County

6h 49m

1 stop

ORD11:41 pmChicago O'Hare Intl

Sep 10

ORD6:00 amChicago O'Hare Intl

8h 46m

1 stop

STS12:46 pmSanta Rosa Sonoma County

$359

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Wed 7/8

4:12 pm-12:51 am

1 stop6h 39m

Chicago O'Hare Intl

Wed 7/15

6:04 am-12:03 pm

1 stop7h 59m

$323

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Sat 6/6

7:06 am-6:50 pm

1 stop9h 44m

Chicago O'Hare Intl

Mon 6/8

9:00 am-2:13 pm

1 stop7h 13m

$336

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 6/8

4:20 pm-12:28 am

1 stop6h 08m

Chicago O'Hare Intl

Tue 6/16

5:00 am-12:05 pm

1 stop9h 05m

$340

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Thu 6/4

4:20 pm-12:28 am

1 stop6h 08m

Chicago O'Hare Intl

Tue 6/16

5:00 am-12:05 pm

1 stop9h 05m

$341

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Sat 6/6

7:06 am-6:50 pm

1 stop9h 44m

Chicago O'Hare Intl

Mon 6/8

9:00 am-2:13 pm

1 stop7h 13m

$356

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 9/1

2:52 pm-11:41 pm

1 stop6h 49m

Chicago O'Hare Intl

Thu 9/10

6:00 am-12:46 pm

1 stop8h 46m

$359

Santa RosaChicago

STS - ORD

STSORD

Santa Rosa Sonoma County

Fri 6/5

12:45 pm-11:32 pm

1 stop8h 47m

Chicago O'Hare Intl

Tue 6/16

5:59 am-12:05 pm

1 stop8h 06m

$361

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Thu 6/25

3:55 pm-1:55 am

1 stop8h 00m

Lambert-St Louis

Wed 7/1

5:35 am-11:05 am

1 stop7h 30m

$482

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Thu 6/25

6:00 am-7:05 pm

2 stops11h 05m

Lambert-St Louis

Wed 7/1

5:35 am-11:05 am

1 stop7h 30m

$487

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Thu 6/25

6:00 am-7:05 pm

2 stops11h 05m

Lambert-St Louis

Wed 7/1

3:05 pm-10:45 pm

2 stops9h 40m

$492

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Santa Rosa is in July. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of July, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $0.

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

You could potentially save up to 73% on your flight if you consider stops on a Santa Rosa to Illinois flight.

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 08m
Direct flights	None

The fastest flight from Santa Rosa to Illinois takes 6h 08m

There are no direct flights from Santa Rosa to Illinois. There are no popular flight routes from Santa Rosa to Illinois.

Search flight deals

Frequently asked questions about flying from Santa Rosa to Illinois

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?
There is 1 operator available for flights from Santa Rosa Sonoma County Airport to Illinois as of May 2026.
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 Airlines	PriceFrom $276	Free Cancellation	Rating 7.9 12,378 reviews		Search Alaska 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.