$135+ Cheap flights from Illinois to San Luis Obispo (SBP)
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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SBP
Aug 19 — Aug 261
1 adult, Economy
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1. Tell us where you want to go
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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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to San Luis Obispo
Keep the following information in mind while searching for Illinois to San Luis Obispo flight deals. Data was last updated August 14, 2025.
Round-trip from | $269 (Hawaiian Airlines) |
|---|---|
One-way from | $135 (American Airlines) |
Popular in | February |
Cheapest in | December |
Average price | $750 |
Find flight deals from Illinois to San Luis Obispo
Cheapest flights from Illinois to San Luis ObispoExplore the most affordable flight options available from Illinois to San Luis Obispo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.
Explore the most affordable flight options available from Illinois to San Luis Obispo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.
This Hawaiian Airlines deal was found by Cheapflights users on 8/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/78:20 amORD - SBP
1 stop7h 19mHawaiian Airlines
Tue 10/217:50 pmSBP - ORD
1 stop8h 34mHawaiian Airlines
Deal found 8/11![Hawaiian Airlines logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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.
Tue 10/78:20 amORD - SBP
1 stop7h 19mAlaska Airlines
Tue 10/212:14 pmSBP - ORD
2 stops22h 36mAlaska Airlines
Deal found 8/11![Alaska Airlines logo]()
$262
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Tue 10/77:18 amORD - SBP
1 stop6h 58mUnited Airlines
Wed 10/86:22 pmSBP - ORD
1 stop8h 51mUnited Airlines
Deal found 8/11![United Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 8/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/710:32 amORD - SBP
2 stops9h 55mAmerican Airlines
Wed 10/812:38 pmSBP - ORD
1 stop6h 23mAmerican Airlines
Deal found 8/11![American Airlines logo]()
$274
This American Airlines deal was found by Cheapflights users on 8/13. 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 9/2711:54 amORD - SBP
2 stops8h 49mAmerican Airlines
Sat 10/412:53 pmSBP - ORD
1 stop7h 31mAmerican Airlines
Deal found 8/13![American Airlines logo]()
$275
This American Airlines deal was found by Cheapflights users on 8/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/710:32 amORD - SBP
2 stops9h 55mAmerican Airlines
Tue 10/2112:42 pmSBP - ORD
2 stops9h 00mAmerican Airlines
Deal found 8/11![American Airlines logo]()
$279
This Hawaiian Airlines deal was found by Cheapflights users on 8/14. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/103:50 pmORD - SBP
1 stop9h 34mHawaiian Airlines
Wed 10/152:03 pmSBP - ORD
1 stop7h 56mHawaiian Airlines
Deal found 8/14![Hawaiian Airlines logo]()
$293
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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 11/147:59 pmORD - SBP
1 stop29h 27mAlaska Airlines
Mon 11/176:00 amSBP - ORD
1 stop5h 54mAlaska Airlines
Deal found 8/13![Alaska Airlines logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 10/107:59 pmORD - SBP
1 stop28h 42mAlaska Airlines
Wed 10/152:03 pmSBP - ORD
1 stop7h 56mAlaska Airlines
Deal found 8/12![Alaska Airlines logo]()
$318
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 9/96:00 amORD - SBP
1 stop7h 34mAmerican Airlines
Tue 9/166:00 amSBP - ORD
1 stop7h 58mAmerican Airlines
Deal found 8/12![American Airlines logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
Sun 9/286:30 pmSTL - SBP
1 stop25h 07mAlaska Airlines
Sun 10/57:50 pmSBP - STL
1 stop26h 13mAlaska Airlines
Deal found 8/14![Alaska Airlines logo]()
$506
This American Airlines deal was found by Cheapflights users on 8/13. 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 11/155:02 amCMI - SBP
1 stop8h 41mAmerican Airlines
Tue 11/1812:28 pmSBP - CMI
1 stop6h 02mAmerican Airlines
Deal found 8/13![American Airlines logo]()
$534
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to San Luis Obispo 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 August 14, 2025.
Use the filters below to find and compare flights from Illinois to San Luis Obispo that are best for you.
Fly from
Illinois
Fly to
San Luis Obispo
Route
Depart
Return
Price
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Tue 10/7
8:20 am-1:39 pm
1 stop7h 19m
San Luis Obispo County
Tue 10/21
7:50 pm-6:24 am
1 stop8h 34m
$257
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Tue 10/7
8:20 am-1:39 pm
1 stop7h 19m
San Luis Obispo County
Tue 10/21
2:14 pm-2:50 pm
2 stops22h 36m
$262
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Tue 10/7
7:40 am-11:57 am
1 stop6h 17m
San Luis Obispo County
Wed 10/8
12:38 pm-9:01 pm
1 stop6h 23m
$269
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Tue 10/7
7:18 am-12:16 pm
1 stop6h 58m
San Luis Obispo County
Wed 10/8
6:22 pm-5:13 am
1 stop8h 51m
$269
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Sat 9/27
10:00 am-5:37 pm
1 stop9h 37m
San Luis Obispo County
Sat 10/4
2:19 pm-11:59 pm
1 stop7h 40m
$269
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Fri 11/14
10:00 am-7:01 pm
1 stop11h 01m
San Luis Obispo County
Mon 11/17
6:00 am-1:54 pm
1 stop5h 54m
$269
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Fri 10/17
3:50 pm-11:24 pm
1 stop9h 34m
San Luis Obispo County
Mon 10/20
7:50 pm-6:24 am
1 stop8h 34m
$269
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Sat 9/27
11:54 am-6:43 pm
2 stops8h 49m
San Luis Obispo County
Sat 10/4
12:53 pm-10:24 pm
1 stop7h 31m
$275
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Tue 10/7
10:32 am-6:27 pm
2 stops9h 55m
San Luis Obispo County
Tue 10/21
12:42 pm-11:42 pm
2 stops9h 00m
$279
St. LouisSan Luis Obispo
STL - SBP
STLSBP
Lambert-St Louis
Sun 9/28
6:30 pm-5:37 pm
1 stop25h 07m
San Luis Obispo County
Sun 10/5
7:50 pm-12:03 am
1 stop26h 13m
$506
Showing 1-10 of 21 results
Best time to book a flight from Illinois to San Luis Obispo
Have a flexible travel schedule? Discover the best time to fly to San Luis Obispo from Illinois with our price prediction graph.
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 Illinois to San Luis Obispo
What is the cheapest month to book a flight from Illinois to San Luis Obispo?
Currently, January is the cheapest month in which you can book a flight from Illinois to San Luis Obispo (average of $374). Flying from Illinois to San Luis Obispo in June is currently the most expensive (average of $512). 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.
What is the cheapest time of day to fly from IL to SBP?
Find hourly flight availability from Illinois to San Luis Obispo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to San Luis Obispo as you normally would.
Related info for your journey
Find useful and relevant information for your journey from Illinois to San Luis Obispo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Luis Obispo?
Book flights to San Luis Obispo if you plan to visit one of these locationsMorro Bay
Avila Beach
Arroyo Grande
San Simeon
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Alternative routes for Illinois to San Luis Obispo
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Illinois to San Luis Obispo
Discover the top 2 airlines that operate flights from Illinois to San Luis Obispo. 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 August 14, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$326 | Average$468 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$518 | Average$623 | FlexibilityNo cancel fee | On-time69% |