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$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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — ORD
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheap 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 agosto 14, 2025.

Round-trip from

$266
(Alaska Airlines)

One-way from

$180
(American Airlines)

Popular in

March

Cheapest in

August

Average price

$339
From San Luis Obispo County to Illinois
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One-way flight from San Luis Obispo County to Illinois
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Highest demand for flights based on searches. 6% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from San Luis Obispo to Illinois

Cheapest flights from San Luis Obispo to Illinois
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 agosto 14, 2025.

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.
mié. 10/152:03 pmSBP - ORD
1 stop7h 56mAlaska Airlines
mar. 10/218:20 amORD - SBP
1 stop16h 21mAlaska Airlines
Deal found 8/14$266
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/184:18 pmSBP - ORD
1 stop5h 54mAmerican Airlines
sáb. 11/225:00 amORD - SBP
1 stop9h 12mAmerican Airlines
Deal found 8/14$269
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/256:22 pmSBP - ORD
1 stop8h 51mUnited Airlines
lun. 9/297:18 amORD - SBP
1 stop6h 58mUnited Airlines
Deal found 8/13$284
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.
mié. 10/152:03 pmSBP - ORD
1 stop7h 56mAlaska Airlines
lun. 10/207:59 pmORD - SBP
1 stop28h 42mAlaska Airlines
Deal found 8/14$295
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.
lun. 10/67:50 pmSBP - ORD
1 stop8h 34mHawaiian Airlines
jue. 10/93:50 pmORD - SBP
1 stop9h 34mHawaiian Airlines
Deal found 8/14$311
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/16:29 pmSBP - ORD
1 stop10h 34mHawaiian Airlines
lun. 10/63:50 pmORD - SBP
1 stop9h 34mHawaiian Airlines
Deal found 8/13$319
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/212:59 pmSBP - ORD
1 stop7h 40mUnited Airlines
lun. 10/66:15 amORD - SBP
1 stop8h 01mUnited Airlines
Deal found 8/14$320
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.
lun. 10/62:14 pmSBP - ORD
2 stops22h 36mAlaska Airlines
jue. 10/93:50 pmORD - SBP
1 stop9h 34mAlaska Airlines
Deal found 8/14$324
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.
vie. 10/177:50 pmSBP - ORD
1 stop8h 34mAlaska Airlines
mar. 10/213:50 pmORD - SBP
1 stop8h 51mAlaska Airlines
Deal found 8/14$333
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.
mié. 10/16:29 pmSBP - ORD
1 stop10h 34mAlaska Airlines
lun. 10/63:50 pmORD - SBP
2 stops23h 44mAlaska Airlines
Deal found 8/13$341
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/52:19 pmSBP - ORD
1 stop8h 26mUnited Airlines
mar. 9/96:15 amORD - SBP
1 stop8h 03mUnited Airlines
Deal found 8/13$359

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 agosto 14, 2025.
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

mié. 10/15

2:03 pm-11:59 pm

1 stop7h 56m

Chicago O'Hare Intl

mar. 10/21

8:20 am-10:41 pm

1 stop16h 21m

$266

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

jue. 9/25

6:22 pm-5:13 am

1 stop8h 51m

Chicago O'Hare Intl

lun. 9/29

7:18 am-12:16 pm

1 stop6h 58m

$284

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

mié. 10/15

2:03 pm-11:59 pm

1 stop7h 56m

Chicago O'Hare Intl

lun. 10/20

7:59 pm-10:41 pm

1 stop28h 42m

$295

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

lun. 10/6

7:50 pm-6:24 am

1 stop8h 34m

Chicago O'Hare Intl

jue. 10/9

3:50 pm-11:24 pm

1 stop9h 34m

$311

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

mié. 10/1

6:29 pm-7:03 am

1 stop10h 34m

Chicago O'Hare Intl

lun. 10/6

3:50 pm-11:24 pm

1 stop9h 34m

$319

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

jue. 10/2

12:59 pm-10:39 pm

1 stop7h 40m

Chicago O'Hare Intl

lun. 10/6

6:15 am-12:16 pm

1 stop8h 01m

$320

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

lun. 10/6

2:14 pm-2:50 pm

2 stops22h 36m

Chicago O'Hare Intl

jue. 10/9

3:50 pm-11:24 pm

1 stop9h 34m

$324

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

vie. 10/17

7:50 pm-6:24 am

1 stop8h 34m

Chicago O'Hare Intl

mar. 10/21

3:50 pm-10:41 pm

1 stop8h 51m

$333

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

mié. 10/1

6:29 pm-7:03 am

1 stop10h 34m

Chicago O'Hare Intl

lun. 10/6

3:50 pm-1:34 pm

2 stops23h 44m

$341

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

jue. 10/2

12:53 pm-10:24 pm

1 stop7h 31m

Chicago O'Hare Intl

dom. 10/5

6:00 am-11:34 am

1 stop7h 34m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 15 results
1
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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.
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

What is the cheapest month to book a flight from San Luis Obispo to Illinois?

Currently, August is the cheapest month in which you can book a flight from San Luis Obispo to Illinois (average of $245). Flying from San Luis Obispo to Illinois in March is currently the most expensive (average of $321). 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 SBP to IL?

Find hourly flight availability from San Luis Obispo to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Luis Obispo to Illinois as you normally would.

How much does it cost to fly round-trip from San Luis Obispo to Illinois?

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 agosto 14, 2025.
Read reviews from past customers who have flown 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.
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

  • What airport do you fly from for flights from San Luis Obispo to Illinois?

    Most people fly from San Luis Obispo County (SBP) if they book a flight from San Luis Obispo to Illinois. San Luis Obispo County is conveniently located just 3.3 mi from San Luis Obispo’s city center.

  • Can I find deals for flights from San Luis Obispo to Illinois that include hotel bookings?

    Yes. In addition to deals on San Luis Obispo to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Luis Obispo to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Luis Obispo to Illinois.

  • Can I find deals for business class flights from San Luis Obispo to Illinois?

    Yes. Cheapflights offers flight deals from San Luis Obispo to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Luis Obispo to Illinois?

    Currently, August is the cheapest month in which you can book a flight from San Luis Obispo to Illinois (average of $245). Flying from San Luis Obispo to Illinois in March is currently the most expensive (average of $321). 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.

See more FAQs

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Alternative routes for San Luis Obispo to Illinois

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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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$274Average$513FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$362Average$649FlexibilityNo cancel feeOn-time69%

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