$180 Find Cheap Flights from San Luis Obispo to Illinois

This is the cheapest one-way 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 3/13. 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 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$459
St. Louis
St. Louis1 stop$309
Peoria
Peoria2 stops$459
St. Louis
St. Louis1 stop$309

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

sam., mai 2 - sam., mai 9
Alaska Airlines Logo
2:27 pm - 11:59 pm
SBP
-
ORD
7h 32m
1 stop
Alaska Airlines Logo
8:50 am - 2:59 pm
ORD
-
SBP
8h 09m
1 stop
$237Alaska Airlines
sam., mai 2 - sam., mai 9
American Airlines Logo
7:02 pm - 5:21 am
SBP
-
ORD
8h 19m
1 stop
American Airlines Logo
3:00 pm - 10:10 pm
ORD
-
SBP
9h 10m
1 stop
$251American Airlines
lun., mars 30 - mar., avr. 7
Hawaiian Airlines Logo
7:34 pm - 6:39 am
SBP
-
ORD
9h 05m
1 stop
Hawaiian Airlines Logo
4:10 pm - 10:29 pm
ORD
-
SBP
8h 19m
1 stop
$257Hawaiian Airlines
jeu., mars 26 - mer., avr. 1
American Airlines Logo
7:10 pm - 5:25 am
SBP
-
ORD
8h 15m
1 stop
American Airlines Logo
5:00 am - 12:03 pm
ORD
-
SBP
9h 03m
1 stop
$305American Airlines
ven., mars 6 - dim., mars 8
American Airlines Logo
12:45 pm - 10:31 pm
SBP
-
ORD
7h 46m
1 stop
American Airlines Logo
7:05 am - 12:03 pm
ORD
-
SBP
6h 58m
1 stop
$309American Airlines
sam., mai 2 - sam., mai 9
Alaska Airlines Logo
3:39 pm - 6:40 am
SBP
-
ORD
13h 01m
2 stops
Alaska Airlines Logo
8:50 am - 2:59 pm
ORD
-
SBP
8h 09m
1 stop
$332Alaska Airlines
lun., mars 2 - lun., mars 9
American Airlines Logo
7:16 pm - 5:25 am
SBP
-
ORD
8h 09m
1 stop
American Airlines Logo
5:00 am - 12:03 pm
ORD
-
SBP
9h 03m
1 stop
$334American Airlines
jeu., févr. 26 - lun., mars 2
United Airlines Logo
8:20 am - 7:55 pm
SBP
-
ORD
9h 35m
1 stop
United Airlines Logo
2:35 pm - 7:50 pm
ORD
-
SBP
7h 15m
1 stop
$359United Airlines
lun., mars 30 - mar., avr. 7
Alaska Airlines Logo
7:34 pm - 6:39 am
SBP
-
ORD
9h 05m
1 stop
Alaska Airlines Logo
2:09 pm - 6:42 pm
ORD
-
SBP
30h 33m
2 stops
$360Alaska Airlines
mar., févr. 24 - sam., févr. 28
United Airlines Logo
5:00 am - 5:10 pm
SBP
-
PIA
10h 10m
2 stops
United Airlines Logo
2:51 pm - 11:59 pm
PIA
-
SBP
11h 08m
2 stops
$459United Airlines
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 is the cheapest month to fly from San Luis Obispo to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Luis Obispo 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 San Luis Obispo to Illinois is August, when tickets cost $317 (return) on average. On the other hand, the most expensive months are November and March, when the average cost of round-trip tickets is $613 and $581 respectively.

Good to know

Low seasonJanuary
Cheapest flight$197
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 9% 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.

Reviews of the top 3 airlines serving 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.
8.0
Alaska AirlinesOverall score based on 11878 reviews
7.8Comfort
8.5Crew
8.1Boarding
7.0Entertainment
7.1Food
Airline reviews

I love Alaska! We arrived on the later side without seat assignments only to find the had oversold the flight by 1. The attendants worked extra hard to find a way for our party of 7 to stay together and we made it on the flight! Loved the free WiFi also!

10.0 ExcellentEric, Feb 2026
SFO - SAN
Read more Alaska Airlines reviews

I love Alaska! We arrived on the later side without seat assignments only to find the had oversold the flight by 1. The attendants worked extra hard to find a way for our party of 7 to stay together and we made it on the flight! Loved the free WiFi also!

The plane not having any overhead bin space was inconvenient. Anytime my luggage has to be checked it ends up covered in scratches and that’s not covered by the airlines for replacement/repair. The WiFi did not work or was not offered for the flight from Seattle to Vancouver.

Delay for switching planes. Then delay after delay (mechanical) after boarding so that we were almost 3 hrs late, getting in at 230am. Crew was good.

The room for legs is adequate for a 6’ tall man and the flight was comfortable. The cabin is clean and the crew is very friendly and pleasant.

The he whole flight was very smooth on every aspects.

Due to plane delays on both legs of my flight home, I had to be rerouted from Santa Rosa to Las Vegas on Skywest and then to DCA on American. SkyWest airlines sat on runway in Las Vegas for 20 minutes waiting for gate to clear. My boarding pass for American that I was given by Alaska was incomplete and the Las Vegas airport lacked signage and departure boards. I barely made my flight bc it was so confusing. American Airlines has a much better wireless connection. I’ll never fly Alaska again. It clearly has problems.

I paid for wifi and it never worked... it was miserable. I couldn't access my shared files to work on the plane, it didn't work on my phone. I paid for nothing but frustration and continual refreshing, hoping it would work

The stewardess are very nice and pleasant, Someone onboard had a medical attention, and they attended that person non-stop all throughout the flight, and yet, did not forget to serve and help other passengers.

Worst first/business class I have ever flown after 75 years on planes. Barely acceptable seats, terrible food, uninterested attendants, unavailable WiFi. I’ll never fly this airline again.

The bathroom trash container under the sink fell out and was like that long before my flight. The plane smelled of canned fish and floor was Deteriorating

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

United Airlines is my preferred airlines and I am thankful for Gary who also help support me on the phone to switch my flight literally last min.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Waited for oxygen tanks for 30 minutes after boarding was complete.

We flew in first class. The crew did not offer drinks before the flight took off, but they treated us well during the flight. The food was excellent. There was actually too much food served, but it was nice to have all the options.

Update to handle the delay was very bad, crews no smiles or welcome or thanks. Don’t care attitude

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

Little warm on the plane and delayed for an hour

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

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

Information on your arrival and departure airports