$260 Find Cheap Flights from San Luis Obispo to Illinois

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Luis Obispo to Illinois departing on 11/15. 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

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 San Luis Obispo 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 San Luis Obispo to Illinois, as well as popular online travel agencies
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Cheap Flights from San Luis Obispo to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Peoria
Peoria2 stops$389
St. Louis
St. Louis1 stop$438
Peoria
Peoria2 stops$389
St. Louis
St. Louis1 stop$438

Book Cheap San Luis Obispo 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 San Luis Obispo 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 San Luis Obispo to Illinois

Sat, Nov 15 - Fri, Nov 21
Alaska Airlines Logo
2:59 pm - 11:59 pmSBP-ORD
7h 00m1 stop
Alaska Airlines Logo
6:00 am - 2:02 pmORD-SBP
10h 02m1 stop
$260Alaska Airlines
Find Deal
Fri, Nov 7 - Wed, Nov 12
American Airlines Logo
12:57 pm - 9:04 pmSBP-ORD
6h 07m1 stop
American Airlines Logo
5:00 am - 9:14 amORD-SBP
6h 14m1 stop
$261American Airlines
Find Deal
Sat, Nov 8 - Mon, Nov 10
American Airlines Logo
12:57 pm - 11:37 pmSBP-ORD
8h 40m2 stops
American Airlines Logo
5:00 am - 12:12 pmORD-SBP
9h 12m1 stop
$266American Airlines
Find Deal
Sat, Nov 8 - Mon, Nov 10
Alaska Airlines Logo
5:27 pm - 5:01 amSBP-ORD
9h 34m1 stop
Alaska Airlines Logo
8:59 pm - 2:05 pmORD-SBP
19h 06m1 stop
$289Alaska Airlines
Find Deal
Tue, Nov 18 - Sat, Nov 22
Alaska Airlines Logo
2:59 pm - 11:59 pmSBP-ORD
7h 00m1 stop
Alaska Airlines Logo
8:49 pm - 11:33 pmORD-SBP
28h 44m1 stop
$291Alaska Airlines
Find Deal
Thu, Nov 13 - Sun, Nov 16
Alaska Airlines Logo
6:00 am - 1:54 pmSBP-ORD
5h 54m1 stop
Alaska Airlines Logo
8:59 pm - 4:55 pmORD-SBP
21h 56m2 stops
$297Alaska Airlines
Find Deal
Tue, Nov 18 - Sat, Nov 22
Alaska Airlines Logo
2:59 pm - 11:59 pmSBP-ORD
7h 00m1 stop
Alaska Airlines Logo
8:20 am - 3:24 pmORD-SBP
9h 04m1 stop
$301Alaska Airlines
Find Deal
Sat, Nov 8 - Wed, Nov 12
United Airlines Logo
5:15 am - 2:48 pmSBP-ORD
7h 33m1 stop
United Airlines Logo
3:40 pm - 9:34 pmORD-SBP
7h 54m1 stop
$351United Airlines
Find Deal
Sat, Mar 7 - Tue, Mar 10
United Airlines Logo
6:00 pm - 9:43 amSBP-PIA
13h 43m2 stops
United Airlines Logo
10:45 am - 8:03 pmPIA-SBP
11h 18m2 stops
$389United Airlines
Find Deal
Tue, Apr 7 - Wed, Apr 8
Hawaiian Airlines Logo
7:25 pm - 5:00 amSBP-ORD
7h 35m1 stop
Hawaiian Airlines Logo
9:00 am - 1:47 pmORD-SBP
6h 47m1 stop
$509Hawaiian Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for San Luis Obispo to Illinois flights

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

What’s the cheapest day of the week to fly from San Luis Obispo to Illinois?

The average price of all round-trip flights from San Luis Obispo to Illinois clicked on KAYAK for each day over the last 12 months.

When flying from San Luis Obispo to Illinois, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to San Luis Obispo, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

Good to know

Low seasonFebruary
Cheapest flight$260
Best time to beat the crowds but there is an average 72% increase in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from San Luis Obispo to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from San Luis Obispo 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 San Luis Obispo to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from San Luis Obispo 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 San Luis Obispo 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 San Luis Obispo 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 San Luis Obispo 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 San Luis Obispo to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $500 on average. Morning departures are around 20% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $688.

Reviews of the top airlines flying from San Luis Obispo to Illinois

 
See real verified KAYAK customer reviews for airlines flying from San Luis Obispo 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 San Luis Obispo 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.
7.4
United AirlinesOverall score based on 8991 reviews
8.1Crew
7.1Entertainment
6.6Food
7.3Comfort
7.7Boarding
Airline reviews

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

6.0 GoodJerome, Oct 2025IAD - ORD
Read more United Airlines reviews

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

Excellent experience. Starting with the agent at the Premier bag drop who noticed I was very early for my scheduled flight and offered to rebook me on an earlier flight with my seat preference. She would not let me leave the counter until she knew that all of the changes and new boarding pass showed up on my United app. At the gate, the flight boarded quickly such that we departed early and the flight was smooth. We arrived 20 minutes early at ORD and I was able to be home in time for dinner. One of the best flights I've had.

Salina to travers city was great! But the sept 24 Tranverse city was not! Traverse city to chichago was cancelled, i went to Denver & got to Salina 6 hours later!

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Flight attendant in first class gave poor service (like he didn't want to be there) and food was awful. We sat waiting for gate upon arrival over 45 mins.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Overall it was good. I missed my connection but I was put on another flight.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

Excellent - explanations were clear staff was nice and flight was comfortable

Lost bag and 2 days no word leaving for cruise no clothes or stuff

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

Pretty good. The food was just mediocre, the boarding and crew were good.

My flight got switched and my prepaid bag didnt transfer over properly so I paid to check ANOTHER BAG. I was placed in a middle seat and it was just miserable. At least it was a bulkhead row so I had legroom. The flight just never seem3d to end

Everything you need to know for your flight from San Luis Obispo to Illinois

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