$139+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SBP
Oct 31 — Nov 71
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 October 1, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $260 (KAYAK) |
One-way from | $139 (American Airlines) |
Popular in | February |
Cheapest in | December |
Average price | $537 |
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 October 1, 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 October 1, 2025.
This KAYAK deal was found by Cheapflights users on 9/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/19:20 amORD - SBP
1 stop6h 45mAlaska Airlines
Tue 11/42:59 pmSBP - ORD
1 stop7h 00mAlaska Airlines
Deal found 9/29![Alaska Airlines logo]()
$260
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 11/59:20 amORD - SBP
1 stop6h 45mAlaska Airlines
Wed 11/122:59 pmSBP - ORD
1 stop7h 00mAlaska Airlines
Deal found 10/1![Alaska Airlines logo]()
$277
This American Airlines deal was found by Cheapflights users on 9/29. 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 10/315:00 amORD - SBP
1 stop8h 37mAmerican Airlines
Tue 11/49:53 amSBP - ORD
2 stops10h 27mAmerican Airlines
Deal found 9/29![American Airlines logo]()
$282
This American Airlines deal was found by Cheapflights users on 9/30. 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 10/2812:03 pmORD - SBP
2 stops8h 24mAmerican Airlines
Tue 11/49:53 amSBP - ORD
2 stops10h 27mAmerican Airlines
Deal found 9/30![American Airlines logo]()
$287
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 11/49:20 amORD - SBP
1 stop6h 45mAlaska Airlines
Tue 11/116:00 amSBP - ORD
1 stop11h 55mAlaska Airlines
Deal found 10/1![Alaska Airlines logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 11/49:20 amORD - SBP
2 stops9h 35mAlaska Airlines
Sat 11/85:27 pmSBP - ORD
1 stop9h 34mAlaska Airlines
Deal found 10/1![Alaska Airlines logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 9/29. 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 11/62:54 pmORD - SBP
1 stop10h 32mAlaska Airlines
Fri 11/77:56 pmSBP - ORD
1 stop8h 26mAlaska Airlines
Deal found 9/29![Alaska Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 11/88:00 amORD - SBP
1 stop13h 01mAlaska Airlines
Thu 11/135:27 pmSBP - ORD
1 stop9h 34mAlaska Airlines
Deal found 10/1![Alaska Airlines logo]()
$310
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 11/89:20 amORD - SBP
1 stop6h 45mAlaska Airlines
Sat 11/85:27 pmSBP - ORD
1 stop9h 34mAlaska Airlines
Deal found 10/1![Alaska Airlines logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 11/89:20 amORD - SBP
1 stop6h 45mAlaska Airlines
Wed 11/125:27 pmSBP - ORD
1 stop9h 34mAlaska Airlines
Deal found 9/30![Alaska Airlines logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 10/1. 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 11/32:54 pmORD - SBP
1 stop25h 11mAlaska Airlines
Wed 11/125:27 pmSBP - ORD
1 stop9h 34mAlaska Airlines
Deal found 10/1![Alaska Airlines logo]()
$320
This Alaska Airlines deal was found by Cheapflights users on 9/30. 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 11/57:00 amSTL - SBP
2 stops11h 55mAlaska Airlines
Mon 11/107:56 pmSBP - STL
1 stop17h 22mAlaska Airlines
Deal found 9/30![Alaska Airlines logo]()
$395
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 October 1, 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
Sat 2/21
9:00 am-7:26 pm
2 stops12h 26m
San Luis Obispo County
Mon 2/23
2:30 pm-11:10 pm
1 stop6h 40m
$274
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Fri 10/31
3:55 pm-9:08 pm
1 stop7h 13m
San Luis Obispo County
Tue 11/4
7:04 am-4:25 pm
1 stop7h 21m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Tue 11/4
9:20 am-2:05 pm
1 stop6h 45m
San Luis Obispo County
Thu 11/13
5:27 pm-5:01 am
1 stop9h 34m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Tue 10/28
4:40 pm-9:34 pm
1 stop6h 54m
San Luis Obispo County
Tue 11/4
6:25 pm-5:00 am
1 stop8h 35m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Wed 11/5
9:20 am-2:05 pm
1 stop6h 45m
San Luis Obispo County
Sat 11/8
5:27 pm-5:01 am
1 stop9h 34m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Sat 11/1
7:10 am-12:19 pm
1 stop7h 09m
San Luis Obispo County
Sun 11/9
6:07 pm-5:16 am
1 stop9h 09m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Wed 11/5
9:20 am-2:05 pm
1 stop6h 45m
San Luis Obispo County
Thu 11/13
5:27 pm-5:01 am
1 stop9h 34m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Wed 11/5
6:15 am-12:19 pm
1 stop8h 04m
San Luis Obispo County
Mon 11/10
2:16 pm-11:10 pm
1 stop6h 54m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Fri 10/31
7:59 pm-2:05 pm
1 stop20h 06m
San Luis Obispo County
Tue 11/4
2:59 pm-11:59 pm
1 stop7h 00m
$277
ChicagoSan Luis Obispo
ORD - SBP
ORDSBP
Chicago O'Hare Intl
Sat 2/14
9:00 am-1:38 pm
1 stop6h 38m
San Luis Obispo County
Mon 2/23
6:00 am-1:59 pm
1 stop5h 59m
$277
Showing 1-10 of 27 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 $510). 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 October 1, 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.
How much does it cost to fly round-trip from Illinois to San Luis Obispo?
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
Browse thousands of different options on Cheapflights for your next trip
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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 October 1, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$268 | Average$487 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$366 | Average$572 | FlexibilityNo cancel fee | On-time69% |