$180+ Cheap flights from San Luis Obispo (SBP) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — ORD
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 September 10, 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 September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 10/712:52 pm -
1 stop8h 38m
Sat 10/105:00 am -
1 stop8h 48m
Deal found 9/5![American Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/2112:38 pm -
1 stop7h 32m
Sat 10/245:00 am -
2 stops9h 07m
Deal found 9/6![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Fri 9/251:00 pm -
1 stop8h 43m
Sun 10/46:00 am -
1 stop7h 41m
Deal found 9/9![American Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Mon 9/2812:31 pm -
1 stop8h 59m
Sun 10/45:00 am -
1 stop9h 11m
Deal found 9/9![American Airlines logo]()
$395
This Expedia deal was found by Cheapflights users on 9/7. 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 10/76:08 am -
1 stop10h 45m
Fri 10/305:46 pm -
2 stops22h 00m
Deal found 9/7![Alaska Airlines logo]()
$421
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 9/1512:31 pm -
1 stop8h 59m
Tue 10/65:00 am -
1 stop6h 14m
Deal found 9/10![American Airlines logo]()
$425
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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 9/226:43 pm -
1 stop9h 37m
Fri 9/252:18 pm -
1 stop11h 32m
Deal found 9/8![Alaska Airlines logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 10/306:30 pm -
1 stop9h 10m
Mon 11/29:30 am -
1 stop10h 32m
Deal found 9/6![Alaska Airlines logo]()
$439
This American Airlines deal was found by Cheapflights users on 9/6. 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 10/2312:38 pm -
1 stop8h 45m
Sat 10/246:54 am -
1 stop6h 54m
Deal found 9/6![American Airlines logo]()
$442
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Mon 10/510:48 am -
1 stop8h 43m
Mon 10/126:00 am -
1 stop6h 07m
Deal found 9/7![United Airlines logo]()
$448
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 11/1112:42 pm -
2 stops9h 17m
Sun 11/156:50 am -
1 stop7h 02m
Deal found 9/5![American Airlines logo]()
$452
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/2310:48 am -
2 stops10h 10m
Sat 10/2410:43 am -
2 stops12h 17m
Deal found 9/6![United Airlines logo]()
$486
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 September 10, 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 September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 11/1112:36 pm -
1 stop7h 54m
Sun 11/155:00 am -
1 stop8h 51m
Deal found 9/5![American Airlines logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 10/306:30 pm -
1 stop9h 10m
Mon 11/29:30 am -
1 stop10h 32m
Deal found 9/6![Alaska Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Mon 10/510:48 am -
1 stop8h 43m
Mon 10/126:00 am -
1 stop6h 07m
Deal found 9/7![United Airlines logo]()
$448
This Alaska Airlines deal was found by Cheapflights users on 9/5. 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 2/65:21 pm -
1 stop28h 38m
Tue 2/97:40 am -
1 stop9h 24m
Deal found 9/5![Alaska Airlines logo]()
$441
This American Airlines deal was found by Cheapflights users on 9/6. 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 10/2312:38 pm -
1 stop8h 45m
Sat 10/246:54 am -
1 stop6h 54m
Deal found 9/6![American Airlines logo]()
$442
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sat 2/66:55 pm -
1 stop8h 39m
Tue 2/92:40 pm -
1 stop7h 11m
Deal found 9/8![United Airlines logo]()
$459
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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 11/116:42 pm -
2 stops8h 58m
Sun 11/157:00 am -
1 stop13h 02m
Deal found 9/7![Alaska Airlines logo]()
$456
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 1/2712:45 pm -
1 stop6h 02m
Sat 1/308:14 am -
2 stops13h 37m
Deal found 9/9![United Airlines logo]()
$464
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/2310:48 am -
2 stops10h 10m
Sat 10/2410:43 am -
2 stops12h 17m
Deal found 9/6![United Airlines logo]()
$486
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/2310:48 am -
2 stops10h 10m
Sun 10/255:30 pm -
2 stops20h 28m
Deal found 9/7![United Airlines logo]()
$802
Last-minute flights from San Luis Obispo to IllinoisDiscover last-minute flight deals from San Luis Obispo to Illinois. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from San Luis Obispo to Illinois. Data last updated September 10, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 9/1512:31 pm -
1 stop8h 59m
Tue 10/65:00 am -
1 stop6h 14m
Deal found 9/10![American Airlines logo]()
$425
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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 9/226:43 pm -
1 stop9h 37m
Fri 9/252:18 pm -
1 stop11h 32m
Deal found 9/8![Alaska Airlines logo]()
$429
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Fri 9/251:00 pm -
1 stop8h 43m
Sun 10/46:00 am -
1 stop7h 41m
Deal found 9/9![American Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Mon 9/2812:31 pm -
1 stop8h 59m
Sun 10/45:00 am -
1 stop9h 11m
Deal found 9/9![American Airlines logo]()
$395
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Mon 10/510:48 am -
1 stop8h 43m
Mon 10/126:00 am -
1 stop6h 07m
Deal found 9/7![United Airlines logo]()
$448
This American Airlines deal was found by Cheapflights users on 9/7. 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 10/512:38 pm -
1 stop7h 32m
Mon 10/125:00 am -
1 stop6h 14m
Deal found 9/7![American Airlines logo]()
$452
This American Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 10/712:52 pm -
1 stop8h 38m
Sat 10/105:00 am -
1 stop8h 48m
Deal found 9/5![American Airlines logo]()
$359
This Expedia deal was found by Cheapflights users on 9/7. 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 10/76:08 am -
1 stop10h 45m
Fri 10/305:46 pm -
2 stops22h 00m
Deal found 9/7![Alaska Airlines logo]()
$421
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/2112:38 pm -
1 stop7h 32m
Sat 10/245:00 am -
2 stops9h 07m
Deal found 9/6![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 9/6. 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 10/2312:38 pm -
1 stop8h 45m
Sat 10/246:54 am -
1 stop6h 54m
Deal found 9/6![American Airlines logo]()
$442
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/2310:48 am -
2 stops10h 10m
Sat 10/2410:43 am -
2 stops12h 17m
Deal found 9/6![United Airlines logo]()
$486
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 10/306:30 pm -
1 stop9h 10m
Mon 11/29:30 am -
1 stop10h 32m
Deal found 9/6![Alaska Airlines logo]()
$439
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 September 10, 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 September 10, 2026.
This Priceline deal was found by Cheapflights users on 9/8. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:26 pm -
1 stop7h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Alaska Airlines logo]()
$180
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 10/132:26 pm -
1 stop20h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Alaska Airlines logo]()
$185
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Thu 11/55:42 pm -
1 stop9h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Alaska Airlines logo]()
$215
This Expedia deal was found by Cheapflights users on 9/8. 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 9/233:24 pm -
1 stop19h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Alaska Airlines logo]()
$220
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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 11/276:01 am -
1 stop10h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Alaska Airlines logo]()
$235
This Alaska Airlines deal was found by Cheapflights users on 9/6. 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 10/146:30 pm -
1 stop9h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Alaska Airlines logo]()
$260
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Thu 10/152:26 pm -
1 stop7h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Alaska Airlines logo]()
$283
This American Airlines deal was found by Cheapflights users on 9/7. 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 10/1512:38 pm -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![American Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 9/8. 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 10/227:11 am -
2 stops11h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![United Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/152:15 pm -
3 stops17h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$689
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $359 (American Airlines) |
One-way from | $180 (Priceline) |
Popular in | October |
Cheapest in | March |
Average price | $573 |
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 7,457,451 searches. Data last updated September 10, 2026.
Use the filters below to find and compare flights from San Luis Obispo to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San Luis ObispoChicago
SBP San Luis Obispo County - ORD Chicago O'Hare Intl
SBPORD
San Luis Obispo County
Tue 10/13
2:26 pm-1:25 pm
1 stop20h 59m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$185
San Luis ObispoChicago
SBP San Luis Obispo County - ORD Chicago O'Hare Intl
SBPORD
San Luis Obispo County
Wed 10/14
2:26 pm-1:25 pm
1 stop20h 59m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$185
San Luis ObispoChicago
SBP San Luis Obispo County - ORD Chicago O'Hare Intl
SBPORD
San Luis Obispo County
Fri 11/27
6:01 am-6:59 pm
1 stop10h 58m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$235
San Luis ObispoChicago
SBP San Luis Obispo County - ORD Chicago O'Hare Intl
SBPORD
San Luis Obispo County
Wed 11/11
12:36 pm-10:30 pm
1 stop7h 54m
Chicago O'Hare Intl
Sun 11/15
5:00 am-11:51 am
1 stop8h 51m
$359
Quickest round-trip
San Luis ObispoPeoria
SBP San Luis Obispo County - PIA Greater Peoria
SBPPIA
San Luis Obispo County
Thu 10/15
12:38 pm-11:23 pm
1 stop8h 45m
Greater Peoria
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$379
San Luis ObispoPeoria
SBP San Luis Obispo County - PIA Greater Peoria
SBPPIA
San Luis Obispo County
Thu 10/22
7:11 am-8:51 pm
2 stops11h 40m
Greater Peoria
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$414
San Luis ObispoChicago
SBP San Luis Obispo County - ORD Chicago O'Hare Intl
SBPORD
San Luis Obispo County
Fri 10/30
6:30 pm-5:40 am
1 stop9h 10m
Chicago O'Hare Intl
Mon 11/2
9:30 am-6:02 pm
1 stop10h 32m
$439
San Luis ObispoChicago
SBP San Luis Obispo County - ORD Chicago O'Hare Intl
SBPORD
San Luis Obispo County
Sat 2/6
5:21 pm-11:59 pm
1 stop28h 38m
Chicago O'Hare Intl
Tue 2/9
7:40 am-3:04 pm
1 stop9h 24m
$441
San Luis ObispoPeoria
SBP San Luis Obispo County - PIA Greater Peoria
SBPPIA
San Luis Obispo County
Fri 10/23
12:38 pm-11:23 pm
1 stop8h 45m
Greater Peoria
Sat 10/24
6:54 am-11:48 am
1 stop6h 54m
$442
San Luis ObispoChicago
SBP San Luis Obispo County - ORD Chicago O'Hare Intl
SBPORD
San Luis Obispo County
Mon 10/5
10:48 am-9:31 pm
1 stop8h 43m
Chicago O'Hare Intl
Mon 10/12
6:00 am-10:07 am
1 stop6h 07m
$448
Showing 1-10 of 16 resultsSorted by cheapest first
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, January is the cheapest month in which you can book a flight from San Luis Obispo to Illinois (average of $378). Flying from San Luis Obispo to Illinois in July is currently the most expensive (average of $729). 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.
How much does it cost to fly round-trip from San Luis Obispo to Illinois?
Airfare is below average for this route at the moment.
San Luis Obispo to Illinois flights typically cost between $423 and $550 in October.The cheapest round-trip price found within the last 5 days was $359 on American Airlines (Oct 7-Oct 10).
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 September 10, 2026.
Read reviews from past customers who have flown Alaska Airlines,United Airlines, andAmerican Airlines from San Luis Obispo to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
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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San Luis Obispo and Illinois flights
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Top 3 airlines flying from San Luis Obispo to Illinois
Discover the top 3 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$290 | Average$620 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$298 | Average$488 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$531 | FlexibilityNo cancel fee | On-time69% |