$187+ 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SBP
Jan 11 — Jan 181
1 adult, Economy
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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
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 December 12, 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 December 12, 2025.
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/178:55 amORD - SBP
1 stop6h 57mAlaska Airlines
Thu 12/255:25 pmSBP - ORD
1 stop9h 37mAlaska Airlines
Deal found 12/10![Alaska Airlines logo]()
$494
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Fri 12/198:39 amORD - SBP
1 stop10h 01mAlaska Airlines
Thu 12/256:00 amSBP - ORD
1 stop6h 37mAlaska Airlines
Deal found 12/10![Alaska Airlines logo]()
$554
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Thu 12/251:55 pmORD - SBP
1 stop9h 10mUnited Airlines
Mon 12/296:23 pmSBP - ORD
1 stop9h 04mUnited Airlines
Deal found 12/9![United Airlines logo]()
$575
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/172:35 pmORD - SBP
1 stop7h 14mUnited Airlines
Wed 12/2412:44 pmSBP - ORD
1 stop6h 35mUnited Airlines
Deal found 12/10![United Airlines logo]()
$584
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/188:39 amORD - SBP
2 stops12h 26mAlaska Airlines
Thu 12/255:25 pmSBP - ORD
1 stop9h 37mAlaska Airlines
Deal found 12/10![Alaska Airlines logo]()
$588
This Expedia deal was found by Cheapflights users on 12/10. 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 12/198:39 amORD - SBP
1 stop10h 01mAlaska Airlines
Wed 12/245:24 pmSBP - ORD
1 stop19h 13mAlaska Airlines
Deal found 12/10![Alaska Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Sat 12/203:42 pmORD - SBP
1 stop7h 23mUnited Airlines
Wed 12/2412:44 pmSBP - ORD
1 stop6h 35mUnited Airlines
Deal found 12/10![United Airlines logo]()
$600
This American Airlines deal was found by Cheapflights users on 12/11. 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 12/305:21 amORD - SBP
1 stop8h 25mAmerican Airlines
Sun 1/47:07 pmSBP - ORD
1 stop8h 27mAmerican Airlines
Deal found 12/11![American Airlines logo]()
$627
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Sun 12/218:39 amORD - SBP
2 stops12h 26mAlaska Airlines
Thu 12/255:25 pmSBP - ORD
1 stop9h 37mAlaska Airlines
Deal found 12/10![Alaska Airlines logo]()
$631
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/1710:00 amORD - SBP
1 stop10h 59mAlaska Airlines
Fri 12/266:00 amSBP - ORD
1 stop6h 37mAlaska Airlines
Deal found 12/10![Alaska Airlines logo]()
$641
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/165:30 pmSTL - SBP
2 stops28h 19mUnited Airlines
Tue 12/307:03 amSBP - STL
2 stops28h 17mUnited Airlines
Deal found 12/11![United Airlines logo]()
$799
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:00 amSTL - SBP
1 stop13h 59mAlaska Airlines
Wed 12/243:55 pmSBP - STL
1 stop22h 31mAlaska Airlines
Deal found 12/11![Alaska Airlines logo]()
$801
Find 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 December 12, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $276 (Alaska Airlines) |
One-way from | $187 (Alaska Airlines) |
Popular in | February |
Cheapest in | January |
Average price | $538 |
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 December 12, 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
Wed 1/7
3:44 pm-11:20 pm
1 stop9h 36m
San Luis Obispo County
Wed 1/14
5:14 pm-2:29 pm
1 stop19h 15m
$279
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Sat 1/24
9:00 am-4:34 pm
1 stop9h 34m
San Luis Obispo County
Wed 1/28
6:00 am-2:29 pm
1 stop6h 29m
$279
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Sat 2/14
8:20 am-11:17 pm
1 stop16h 57m
San Luis Obispo County
Sun 2/22
6:00 am-11:59 pm
1 stop15h 59m
$300
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Fri 1/9
3:44 pm-3:01 pm
2 stops25h 17m
San Luis Obispo County
Sat 1/10
5:14 pm-2:29 pm
2 stops19h 15m
$313
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Wed 1/14
3:44 pm-11:20 pm
1 stop9h 36m
San Luis Obispo County
Sat 1/17
3:41 pm-2:29 pm
1 stop20h 48m
$320
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Thu 2/12
8:20 am-11:17 pm
1 stop16h 57m
San Luis Obispo County
Tue 2/17
6:00 am-2:58 pm
1 stop6h 58m
$341
St. LouisSan Luis Obispo
STL - SBP
STLSBP
Lambert-St Louis
Wed 1/21
2:50 pm-11:20 pm
2 stops10h 30m
San Luis Obispo County
Sat 1/24
5:35 pm-1:54 pm
2 stops18h 19m
$419
St. LouisSan Luis Obispo
STL - SBP
STLSBP
Lambert-St Louis
Wed 1/7
7:15 am-12:17 pm
1 stop7h 02m
San Luis Obispo County
Sat 1/10
4:18 pm-11:59 pm
1 stop5h 41m
$477
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Mon 1/19
9:00 am-11:20 pm
1 stop16h 20m
$187
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Mon 1/19
12:59 pm-11:20 pm
3 stops36h 21m
$449
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, February is the cheapest month in which you can book a flight from Illinois to San Luis Obispo (average of $229). Flying from Illinois to San Luis Obispo in May is currently the most expensive (average of $340). 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 December 12, 2025.
It’s optimal to fly from Illinois to San Luis Obispo in the afternoon. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight in the evening.
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
Arroyo Grande
Avila Beach
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 December 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$268 | Average$489 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$276 | Average$566 | FlexibilityNo cancel fee | On-time69% |