$131 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 4/25. 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
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Luis Obispo to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Peoria
Peoria1 stop$871
St. Louis
St. Louis2 stops$276
Peoria
Peoria1 stop$871
St. Louis
St. Louis2 stops$276

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

Tue, Apr 14 - Tue, Apr 21
Alaska Airlines Logo
3:12 pm - 2:21 pm
SBP
-
ORD
21h 09m
1 stop
Alaska Airlines Logo
8:20 am - 2:32 pm
ORD
-
SBP
8h 12m
1 stop
$265Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
United Airlines Logo
5:00 am - 1:12 pm
SBP
-
ORD
6h 12m
1 stop
United Airlines Logo
6:00 pm - 11:44 pm
ORD
-
SBP
7h 44m
1 stop
$266United Airlines
Sat, May 2 - Sat, May 9
American Airlines Logo
12:55 pm - 10:45 pm
SBP
-
ORD
7h 50m
1 stop
American Airlines Logo
5:00 am - 12:25 pm
ORD
-
SBP
9h 25m
1 stop
$271American Airlines
Sat, Apr 25 - Sat, May 2
American Airlines Logo
12:55 pm - 10:00 pm
SBP
-
ORD
7h 05m
1 stop
American Airlines Logo
6:04 am - 12:10 pm
ORD
-
SBP
8h 06m
1 stop
$272American Airlines
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
12:55 pm - 10:45 pm
SBP
-
ORD
7h 50m
1 stop
American Airlines Logo
10:41 am - 6:20 pm
ORD
-
SBP
9h 39m
2 stops
$276American Airlines
Sat, May 2 - Sat, May 9
American Airlines Logo
12:55 pm - 11:48 pm
SBP
-
ORD
8h 53m
1 stop
American Airlines Logo
5:00 am - 12:10 pm
ORD
-
SBP
9h 10m
1 stop
$291American Airlines
Sat, May 2 - Sat, May 9
American Airlines Logo
12:55 pm - 10:00 pm
SBP
-
ORD
7h 05m
1 stop
American Airlines Logo
11:43 am - 6:32 pm
ORD
-
SBP
8h 49m
2 stops
$296American Airlines
Fri, Apr 24 - Wed, Apr 29
Alaska Airlines Logo
3:39 pm - 11:43 pm
SBP
-
ORD
6h 04m
1 stop
Alaska Airlines Logo
8:50 am - 2:59 pm
ORD
-
SBP
8h 09m
1 stop
$297Alaska Airlines
Sat, May 2 - Sat, May 9
American Airlines Logo
12:55 pm - 10:00 pm
SBP
-
ORD
7h 05m
1 stop
American Airlines Logo
11:43 am - 6:32 pm
ORD
-
SBP
8h 49m
2 stops
$305American Airlines
Tue, Apr 14 - Tue, Apr 21
Alaska Airlines Logo
6:00 am - 2:21 pm
SBP
-
ORD
6h 21m
1 stop
Alaska Airlines Logo
8:00 am - 10:29 pm
ORD
-
SBP
16h 29m
2 stops
$319Alaska 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.

How much is a round-trip flight from San Luis Obispo to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Luis Obispo to Illinois departing in April.

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 July, when the average cost of round-trip tickets is $613 and $568 respectively.

Good to know

Low seasonJanuary
Cheapest flight$131
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 2% increase in price.
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 12029 reviews
7.1Food
7.8Comfort
8.1Boarding
8.5Crew
7.0Entertainment
Airline reviews

signage from the upper area to the tram down 2 escalator!

8.0 ExcellentAnonymous, Mar 2026
PSP - SEA
Read more Alaska Airlines reviews

signage from the upper area to the tram down 2 escalator!

You sent me an email saying boarding was at 9:29 and AA sent one that was 8:29 on Sunday morning. I had to call AA to get that it was indeed 8:29.

Not bad. Due to not buying a seat, on the way back, my seat was not assigned till 2 hrs before the flight left. Got me worried I wouldn’t have a seat.

Great flights, little turbulence, pilots kept stewardesses seated & safe, all staff friendly & professional

There is no entertainment on the plane. The snack is minimal. The crew was nice and professional.

Good as usual. Just wished my seat was assigned at online check in. Thanks anyways

This was my first trip with Alaska Airlines (round trip DCA to San Diego). Despite a slight delay on the return flight, I feel compelled to post a RAVE review! I cannot praise the airline and the crew enough! Everyone was kind, professional, and courteous, every step of the way- excellent service, snacks, and entertainment! On both legs of the trip I inquired whether there were any free seating upgrades and my request were granted BOTH times! I’ve flown on other airlines where they won’t do that, even when those premium seats are empty. As a customer service professional myself, I can say I left my experience feeling like a valued customer and not just a number. I NEVER expected to praise an airline lol I’ll definitely go out of my way to fly with Alaska on future trips. Thank you for such an awesome experience!

Our flight when we finally got rerouted to a different destination than we were going was fine. But 2 days was taken out of our vacation because our flit was cancelled. We understand mechanical problems and of course don’t want to be on a plane that has mechanical problems.Wish there had been another solution.

in-flight wifi was not working well. also the cabin temperature was a bit hot.

Nice crew, healthy snacks and drinks available. Flight to Seattle was short and comfortable.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

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

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

It was good experience this time. The flight was on time.

There was a delay with the plan which cause the flight to leave later and once arrived in Chicago there was another delay and some passengers missed their connecting flights

The gate agent had a really bad attitude and refused to help me get on the standby list. She just handed me a card and said I needed to call a number. I asked her to help with the AA app on my phone and she just shrugged and said she didnt know. After a few phone calls, I eventually just went to a different gate agent on the other side of the terminal and got the help I needed.

Overall, my last three trips on American Airlines have all been either delayed or "rescheduled" due to mechanical issues. At least on delay caused me to miss two possible connecting flights each later than the first. My last option for my last connection required the assistance of the onsite service desk (O'Hare Airport). The wait time for the service desk was such that it jeopardized getting booked on the last connecting flight available for the night. Suffice it to say, my latest experiences with American Airlines have caused me extensive loss of productive business and personal time and can therefore be classified as significantly less than satisfactory.

Waiting for gate in RDU for more than 20mins is crazy.

American Airlines was great and worked very hard to change my ticket so I could get an earlier, direct flight back to Dallas. However, I was informed that Kayak made mistakes with my itinerary and classified my ticket as desiring to be on the earlier flight instead of taking the necessary step of calling AA to get me on the standby list. This ended up keeping me from being added to the standby list and delayed me getting home by 6 hours. I am happy to discuss this further with Kayak so they can correct their procedures so this won't happen again.

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

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

Information on your arrival and departure airports