$180+ Cheap flights from San Luis Obispo (SBP) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — ORD
Mar 15 — Mar 221
1 adult, Economy
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Cheapest flights from San Luis Obispo to IllinoisExplore the most affordable flight options available from San Luis Obispo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
Explore the most affordable flight options available from San Luis Obispo to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.
This Alaska Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/22:27 pm
SBP
- ORD
1 stop7h 32m
Alaska Airlines
Sat 5/98:50 am
ORD
- SBP
1 stop8h 09m
Alaska Airlines
Deal found 2/11![Alaska Airlines logo]()
$237
This American Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:02 pm
SBP
- ORD
1 stop8h 19m
American Airlines
Sat 5/93:00 pm
ORD
- SBP
1 stop9h 10m
American Airlines
Deal found 2/10![American Airlines logo]()
$251
This Trip.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:34 pm
SBP
- ORD
1 stop9h 05m
Hawaiian Airlines
Tue 4/74:10 pm
ORD
- SBP
1 stop8h 19m
Hawaiian Airlines
Deal found 2/10![Hawaiian Airlines logo]()
$257
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/267:10 pm
SBP
- ORD
1 stop8h 15m
American Airlines
Wed 4/15:00 am
ORD
- SBP
1 stop9h 03m
American Airlines
Deal found 2/12![American Airlines logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:30 pm
SBP
- ORD
1 stop7h 11m
Alaska Airlines
Sat 10/317:00 am
ORD
- SBP
1 stop7h 38m
Alaska Airlines
Deal found 2/9![Alaska Airlines logo]()
$309
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/27:16 pm
SBP
- ORD
1 stop8h 09m
American Airlines
Mon 3/95:00 am
ORD
- SBP
1 stop9h 03m
American Airlines
Deal found 2/12![American Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/268:20 am
SBP
- ORD
1 stop9h 35m
United Airlines
Mon 3/22:35 pm
ORD
- SBP
1 stop7h 15m
United Airlines
Deal found 2/11![United Airlines logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:34 pm
SBP
- ORD
1 stop9h 05m
Alaska Airlines
Tue 4/72:09 pm
ORD
- SBP
2 stops30h 33m
Alaska Airlines
Deal found 2/10![Alaska Airlines logo]()
$360
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:50 pm
SBP
- ORD
2 stops8h 46m
American Airlines
Sun 3/85:00 am
ORD
- SBP
1 stop9h 03m
American Airlines
Deal found 2/12![American Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:00 am
SBP
- PIA
2 stops10h 10m
United Airlines
Sat 2/281:25 pm
PIA
- SBP
2 stops12h 34m
United Airlines
Deal found 2/9![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:00 am
SBP
- PIA
1 stop13h 37m
United Airlines
Tue 3/39:00 am
PIA
- SBP
1 stop14h 09m
United Airlines
Deal found 2/12![United Airlines logo]()
$752
Best flights from San Luis Obispo to IllinoisDiscover carefully curated flight deals from San Luis Obispo to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from San Luis Obispo to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This Alaska Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/22:27 pm
SBP
- ORD
1 stop7h 32m
Alaska Airlines
Sat 5/98:50 am
ORD
- SBP
1 stop8h 09m
Alaska Airlines
Deal found 2/11![Alaska Airlines logo]()
$237
This American Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:02 pm
SBP
- ORD
1 stop8h 19m
American Airlines
Sat 5/93:00 pm
ORD
- SBP
1 stop9h 10m
American Airlines
Deal found 2/10![American Airlines logo]()
$251
This Trip.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:34 pm
SBP
- ORD
1 stop9h 05m
Hawaiian Airlines
Tue 4/74:10 pm
ORD
- SBP
1 stop8h 19m
Hawaiian Airlines
Deal found 2/10![Hawaiian Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:00 am
SBP
- PIA
2 stops10h 10m
United Airlines
Sat 2/281:25 pm
PIA
- SBP
2 stops12h 34m
United Airlines
Deal found 2/9![United Airlines logo]()
$459
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/267:10 pm
SBP
- ORD
1 stop8h 15m
American Airlines
Wed 4/15:00 am
ORD
- SBP
1 stop9h 03m
American Airlines
Deal found 2/12![American Airlines logo]()
$305
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:45 pm
SBP
- ORD
1 stop7h 46m
American Airlines
Sun 3/87:05 am
ORD
- SBP
1 stop6h 58m
American Airlines
Deal found 2/12![American Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:24 pm
SBP
- ORD
1 stop9h 16m
Alaska Airlines
Mon 5/187:59 pm
ORD
- SBP
1 stop20h 01m
Alaska Airlines
Deal found 2/9![Alaska Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/127:10 pm
SBP
- ORD
1 stop8h 15m
American Airlines
Tue 3/246:59 pm
ORD
- SBP
1 stop6h 32m
American Airlines
Deal found 2/10![American Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:45 pm
SBP
- ORD
1 stop18h 36m
Alaska Airlines
Mon 6/293:41 pm
ORD
- SBP
1 stop9h 51m
Alaska Airlines
Deal found 2/12![Alaska Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/27:16 pm
SBP
- ORD
1 stop8h 09m
American Airlines
Mon 3/95:00 am
ORD
- SBP
1 stop9h 03m
American Airlines
Deal found 2/12![American Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:56 pm
SBP
- PIA
2 stops14h 15m
United Airlines
Tue 3/31:25 pm
PIA
- SBP
2 stops12h 34m
United Airlines
Deal found 2/12![United Airlines logo]()
$459
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/127:10 pm
SBP
- ORD
1 stop8h 15m
American Airlines
Mon 3/166:59 pm
ORD
- SBP
1 stop6h 32m
American Airlines
Deal found 2/9![American Airlines logo]()
$334
This American Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:10 pm
SBP
- ORD
1 stop8h 15m
American Airlines
Tue 3/246:59 pm
ORD
- SBP
1 stop6h 32m
American Airlines
Deal found 2/10![American Airlines logo]()
$334
Last-minute flights from San Luis Obispo to IllinoisDiscover last-minute flight deals from San Luis Obispo to Illinois. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from San Luis Obispo to Illinois. Data last updated February 13, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2312:19 pm
SBP
- ORD
1 stop9h 40m
Alaska Airlines
Thu 2/268:20 am
ORD
- SBP
1 stop16h 57m
Alaska Airlines
Deal found 2/12![Alaska Airlines logo]()
$404
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:00 am
SBP
- PIA
2 stops10h 10m
United Airlines
Sat 2/282:51 pm
PIA
- SBP
2 stops11h 08m
United Airlines
Deal found 2/10![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/268:20 am
SBP
- ORD
1 stop9h 35m
United Airlines
Mon 3/22:35 pm
ORD
- SBP
1 stop7h 15m
United Airlines
Deal found 2/11![United Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2712:50 pm
SBP
- ORD
2 stops8h 46m
American Airlines
Tue 3/37:05 am
ORD
- SBP
1 stop6h 58m
American Airlines
Deal found 2/12![American Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:00 am
SBP
- PIA
1 stop13h 37m
United Airlines
Tue 3/39:00 am
PIA
- SBP
1 stop14h 09m
United Airlines
Deal found 2/12![United Airlines logo]()
$752
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/27:16 pm
SBP
- ORD
1 stop8h 09m
American Airlines
Mon 3/95:00 am
ORD
- SBP
1 stop9h 03m
American Airlines
Deal found 2/12![American Airlines logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:47 pm
SBP
- ORD
2 stops21h 11m
Alaska Airlines
Mon 3/98:20 am
ORD
- SBP
1 stop16h 57m
Alaska Airlines
Deal found 2/12![Alaska Airlines logo]()
$418
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:45 pm
SBP
- ORD
1 stop7h 46m
American Airlines
Sun 3/87:05 am
ORD
- SBP
1 stop6h 58m
American Airlines
Deal found 2/12![American Airlines logo]()
$309
This Expedia deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:33 pm
SBP
- ORD
1 stop26h 23m
Alaska Airlines
Tue 3/246:00 am
ORD
- SBP
2 stops18h 29m
Alaska Airlines
Deal found 2/10![Alaska Airlines logo]()
$412
This American Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/267:10 pm
SBP
- ORD
1 stop8h 15m
American Airlines
Wed 4/15:00 am
ORD
- SBP
1 stop9h 03m
American Airlines
Deal found 2/12![American Airlines logo]()
$305
This Trip.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:34 pm
SBP
- ORD
1 stop9h 05m
Hawaiian Airlines
Tue 4/74:10 pm
ORD
- SBP
1 stop8h 19m
Hawaiian Airlines
Deal found 2/10![Hawaiian Airlines logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/307:34 pm
SBP
- ORD
1 stop9h 05m
Alaska Airlines
Tue 4/72:09 pm
ORD
- SBP
2 stops30h 33m
Alaska Airlines
Deal found 2/10![Alaska Airlines logo]()
$360
One-way flights from San Luis Obispo to IllinoisSearch for one-way flight options from San Luis Obispo to Illinois. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
Search for one-way flight options from San Luis Obispo to Illinois. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
This Expedia deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
SBP
- ORD
1 stop6h 21m
Alaska Airlines
Deal found 2/12![Alaska Airlines logo]()
$180
This Alaska Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/137:33 pm
SBP
- ORD
1 stop26h 23m
Alaska Airlines
Deal found 2/9![Alaska Airlines logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/612:19 pm
SBP
- ORD
1 stop9h 40m
Alaska Airlines
Deal found 2/11![Alaska Airlines logo]()
$217
This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:15 am
SBP
- ORD
2 stops14h 44m
United Airlines
Deal found 2/11![United Airlines logo]()
$298
This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:00 pm
SBP
- ORD
1 stop9h 18m
United Airlines
Deal found 2/11![United Airlines logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 pm
SBP
- ORD
3 stops20h 40m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$468
Find flight deals from San Luis Obispo to Illinois
Keep the following information in mind while searching for San Luis Obispo to Illinois flight deals. Data was last updated February 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $237 (Alaska Airlines) |
One-way from | $180 (Expedia) |
Popular in | November |
Cheapest in | August |
Average price | $446 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Luis Obispo to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 13, 2026.
Use the filters below to find and compare flights from San Luis Obispo to Illinois that are best for you.
Fly from
San Luis Obispo
Fly to
Illinois
Route
Depart
Return
Price
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Sat 5/2
2:27 pm-11:59 pm
1 stop7h 32m
Chicago O'Hare Intl
Sat 5/9
8:50 am-2:59 pm
1 stop8h 09m
$237
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Sat 5/2
7:02 pm-5:21 am
1 stop8h 19m
Chicago O'Hare Intl
Sat 5/9
3:00 pm-10:10 pm
1 stop9h 10m
$251
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Mon 3/30
7:34 pm-6:39 am
1 stop9h 05m
Chicago O'Hare Intl
Tue 4/7
4:10 pm-10:29 pm
1 stop8h 19m
$257
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Thu 3/26
7:10 pm-5:25 am
1 stop8h 15m
Chicago O'Hare Intl
Wed 4/1
5:00 am-12:03 pm
1 stop9h 03m
$305
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Fri 3/6
12:45 pm-10:31 pm
1 stop7h 46m
Chicago O'Hare Intl
Sun 3/8
7:05 am-12:03 pm
1 stop6h 58m
$309
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Thu 3/12
7:10 pm-5:25 am
1 stop8h 15m
Chicago O'Hare Intl
Tue 3/24
6:59 pm-11:31 pm
1 stop6h 32m
$309
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Mon 3/2
7:16 pm-5:25 am
1 stop8h 09m
Chicago O'Hare Intl
Mon 3/9
5:00 am-12:03 pm
1 stop9h 03m
$334
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Thu 3/12
7:10 pm-5:25 am
1 stop8h 15m
Chicago O'Hare Intl
Mon 3/16
6:59 pm-11:31 pm
1 stop6h 32m
$334
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Fri 3/13
7:10 pm-5:25 am
1 stop8h 15m
Chicago O'Hare Intl
Tue 3/24
6:59 pm-11:31 pm
1 stop6h 32m
$334
San Luis ObispoChicago
SBP - ORD
SBPORD
San Luis Obispo County
Fri 5/15
7:24 pm-6:40 am
1 stop9h 16m
Chicago O'Hare Intl
Mon 5/18
7:59 pm-2:00 pm
1 stop20h 01m
$359
Showing 1-10 of 20 results
Best time to book a flight from San Luis Obispo to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from San Luis Obispo with our price prediction graph.
SBP-ORD
SBP-PIA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from San Luis Obispo to Illinois
SBP-USIL
SBP-ORD
SBP-PIA
What is the cheapest month to book a flight from San Luis Obispo to Illinois?
Currently, October is the cheapest month in which you can book a flight from San Luis Obispo to Illinois (average of $240). Flying from San Luis Obispo to Illinois in November is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated February 13, 2026.
Read reviews from past customers who have flown Alaska Airlines, United Airlines, and American Airlines from San Luis Obispo to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Overall
8.0
Comfort
7.8
Food
7.1
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Entertainment
7.0
Overall
8.0
Comfort
7.8
Food
7.1
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Entertainment
7.0
Overall
8.0
Comfort
7.8
Food
7.1
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Entertainment
7.0
Overall
8.0
Comfort
7.8
Food
7.1
Crew
8.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Related info for your journey
Find useful and relevant information for your journey from San Luis Obispo to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for San Luis Obispo to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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San Luis Obispo and Illinois flights
Browse other San Luis Obispo and Illinois flight options. Last updated on February 13, 2026.
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San Luis Obispo to Illinois flights
Consider these flights traveling from San Luis Obispo to Illinois.
Top 2 airlines flying from San Luis Obispo to Illinois
Discover the top 2 airlines that operate flights from San Luis Obispo to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$274 | Average$430 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$362 | Average$627 | FlexibilityNo cancel fee | On-time69% |