$172 Find Cheap Flights from Santa Rosa to Illinois - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Santa Rosa to Illinois departing on 7/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Santa Rosa to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Santa Rosa to Illinois, as well as popular online travel agencies
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Cheap Flights from Santa Rosa to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Moline
Moline1 stop$788
St. Louis
St. Louis1 stop$401
Moline
Moline1 stop$788
St. Louis
St. Louis1 stop$401

Book Cheap Santa Rosa to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Santa Rosa to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Santa Rosa to Illinois

Tue, Jun 30 - Sat, Jul 4
Alaska Airlines Logo
7:03 pm - 5:00 am
STS
-
ORD
7h 57m
1 stop
Alaska Airlines Logo
5:59 pm - 10:58 pm
ORD
-
STS
6h 59m
1 stop
$343Alaska Airlines
Wed, Sep 9 - Tue, Sep 15
Alaska Airlines Logo
6:13 am - 7:21 pm
STS
-
ORD
11h 08m
1 stop
Alaska Airlines Logo
7:20 am - 4:39 pm
ORD
-
STS
11h 19m
2 stops
$359Alaska Airlines
Tue, Jun 30 - Tue, Jul 14
Alaska Airlines Logo
7:03 pm - 5:00 am
STS
-
ORD
7h 57m
1 stop
Alaska Airlines Logo
6:20 am - 5:16 pm
ORD
-
STS
12h 56m
2 stops
$363Alaska Airlines
Wed, Aug 19 - Wed, Aug 26
Alaska Airlines Logo
1:40 pm - 11:59 pm
STS
-
ORD
32h 19m
2 stops
Alaska Airlines Logo
6:01 am - 4:39 pm
ORD
-
STS
12h 38m
2 stops
$371Alaska Airlines
Wed, Oct 14 - Tue, Oct 20
American Airlines Logo
4:20 pm - 12:17 am
STS
-
STL
5h 57m
1 stop
American Airlines Logo
5:40 am - 12:12 pm
STL
-
STS
8h 32m
1 stop
$401American Airlines
Wed, Oct 14 - Tue, Oct 20
Southwest Logo
7:40 am - 9:15 pm
STS
-
STL
11h 35m
2 stops
Southwest Logo
5:30 am - 11:05 am
STL
-
STS
7h 35m
1 stop
$406Southwest
Wed, Oct 14 - Tue, Oct 20
Southwest Logo
7:40 am - 9:15 pm
STS
-
STL
11h 35m
2 stops
Southwest Logo
12:40 pm - 9:30 pm
STL
-
STS
10h 50m
2 stops
$411Southwest
Wed, Aug 5 - Thu, Aug 13
Southwest Logo
6:00 am - 6:15 pm
STS
-
STL
10h 15m
2 stops
Southwest Logo
6:25 am - 12:15 pm
STL
-
STS
7h 50m
1 stop
$430Southwest
Wed, Jul 1 - Sun, Jul 5
American Airlines Logo
12:45 pm - 11:30 pm
STS
-
MLI
8h 45m
1 stop
American Airlines Logo
7:20 am - 3:42 pm
MLI
-
STS
10h 22m
2 stops
$788American Airlines
Wed, Jul 1 - Sun, Jul 5
American Airlines Logo
12:45 pm - 11:30 pm
STS
-
MLI
8h 45m
1 stop
American Airlines Logo
4:45 pm - 12:03 pm
MLI
-
STS
21h 18m
1 stop
$1,164American Airlines
Booking Insights

KAYAK's insights & trends for Santa Rosa to Illinois flights

Get data-powered insights and trends into flights from Santa Rosa to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Santa Rosa to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Santa Rosa to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Santa Rosa to Illinois is January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are April and June, when the average cost of round-trip tickets is $639 and $573 respectively.

Good to know

Low seasonNovember
Cheapest flight$172
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 36% increase in price.
Flight from Santa Rosa to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Santa Rosa to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Santa Rosa to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Santa Rosa to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Santa Rosa to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Santa Rosa to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Santa Rosa to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Santa Rosa to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Santa Rosa to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Santa Rosa to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Santa Rosa to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Santa Rosa to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12541 reviews
8.5Crew
7.1Food
7.0Entertainment
8.1Boarding
7.8Comfort
Airline reviews

Subject: Formal Complaint – Incompetent Service and Denied Boarding on Flight 1409 (CLSVJM – Dear Alaska Airlines Customer Relations, I am writing to file a formal complaint regarding my experience on Flight 1409 departing from Seattle on 6/13/26. As a physician and business owner who frequently coordinates group travel, this was one of the worst airline experiences I have encountered. Upon arrival, I was informed that my check-in boarding pass was not official, despite successfully obtaining it electronically through your website/app with no warnings or indications of issues. My electronic boarding pass was rejected, leading to cancellation/denial of boarding. The gate agent (an older woman) was unhelpful, claimed my name had been announced multiple times (which it had not—she did not even know my name correctly), and mistakenly boarded my traveling companion under my name. Additionally, an older blonde staff member nearly failed to return my passport, highlighting a clear lack of training on your check-in and boarding systems. This chaos forced me onto a later flight while my group waited in Canada, unable to check into our Airbnb or pick up rental cars (as I was the primary booker). The entire incident caused significant business disruption, stress, and additional expenses. I have flown Alaska Airlines previously but will not consider it again without resolution. I request: • Full reimbursement of any additional costs incurred. • Appropriate compensation (vouchers/miles) for the inconvenience and poor service. • Confirmation of corrective actions for Please respond within 7-10 business days. Sincerely, Dr. Chunwen Teng

2.0 MediocreJane, Jun 2026
SMF - SEA
Read more Alaska Airlines reviews

Subject: Formal Complaint – Incompetent Service and Denied Boarding on Flight 1409 (CLSVJM – Dear Alaska Airlines Customer Relations, I am writing to file a formal complaint regarding my experience on Flight 1409 departing from Seattle on 6/13/26. As a physician and business owner who frequently coordinates group travel, this was one of the worst airline experiences I have encountered. Upon arrival, I was informed that my check-in boarding pass was not official, despite successfully obtaining it electronically through your website/app with no warnings or indications of issues. My electronic boarding pass was rejected, leading to cancellation/denial of boarding. The gate agent (an older woman) was unhelpful, claimed my name had been announced multiple times (which it had not—she did not even know my name correctly), and mistakenly boarded my traveling companion under my name. Additionally, an older blonde staff member nearly failed to return my passport, highlighting a clear lack of training on your check-in and boarding systems. This chaos forced me onto a later flight while my group waited in Canada, unable to check into our Airbnb or pick up rental cars (as I was the primary booker). The entire incident caused significant business disruption, stress, and additional expenses. I have flown Alaska Airlines previously but will not consider it again without resolution. I request: • Full reimbursement of any additional costs incurred. • Appropriate compensation (vouchers/miles) for the inconvenience and poor service. • Confirmation of corrective actions for Please respond within 7-10 business days. Sincerely, Dr. Chunwen Teng

Never had so many staff members be rude and disrespectful. I had a staff member sarcastically call me “girly” after making me wait 20 minutes to be seen by her. I was able to print my luggage tag and she told me I was too late to check luggage I said the system obviously disagrees. And you had me wait way too long while you asked every single passenger ahead of me about their Disney vacations. She wasted so much time to then say “girly your bag won’t make it on the plane” I’m not her girly I’m a full grown adult. She needs to learn a hell of a lot of respect

My flight was several times rescheduled and then finally canceled.

The flight itself was great. But we had to wait over an hour to deplane so I missed my train. Not the crews fault. They were wonderful!

Flying into PAE was so easy because it’s baggage claim is quick and accesible. I had a car rental and the counter is inside the baggage claim area, very convenient.

It was a very short flight so there really wasn’t any entertainment my. The little pretzels were good though and the cabin crew was awesome.

The flight kept getting delayed due to a maintenance issue. That happens, but there is no excuse for changing the gate FIVE TIMES, including one time nearly all the way across SeaTac. After we were delayed for 3+ hours, they did send us (via email) a $12 meal voucher...except you can't find a $12 meal anywhere in that airport, unless you consider a bag of M&M's and a bottle of water a meal. The plane had one problem after another but finally took off 4.5 hours late. This caused us to miss our hotel shuttle at ORD (they didn't run past midnight and it was 3 am) so we had to wait 25 minutes and pay for an Uber. I did get a $50 flight voucher from Alaska...big deal. Barely covers my Uber ride that I shouldn't have needed.

It was good. Too long for older people. Service and support was great! Friendly crew!

I had to change my flight last minute due to a medical emergency. Their agent was compassionate and extremely helpful. This airlines really cares about making travel, for fun, work, or an emergency a customer-focused experience. Thank you!

No issues and clear sailing. What a preferred to have sat in one of empty seats other than my assigned seat that would be my only complaint if it was to complain.

Everything you need to know for your flight from Santa Rosa to Illinois

Information on your arrival and departure airports