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$138+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — ORD
oct. 30 — nov. 61
jue. 10/30
jue. 11/6
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 septiembre 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(Alaska Airlines)

One-way from

$138
(Orbitz)

Popular in

March

Cheapest in

August

Average price

$448
Provider with most accurate pricing for San Luis Obispo County-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for San Luis Obispo County-Chicago (CHI) flights.
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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. 12% potential increase in price ($79 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 30, 2025.

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.
sáb. 11/155:27 pmSBP - ORD
1 stop9h 34mAlaska Airlines
vie. 11/216:00 amORD - SBP
1 stop10h 02mAlaska Airlines
Deal found 9/30$277
This American Airlines deal was found by Cheapflights users on 9/28. 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.
mié. 10/224:36 pmSBP - ORD
1 stop5h 54mAmerican Airlines
sáb. 10/2512:03 pmORD - SBP
2 stops8h 24mAmerican Airlines
Deal found 9/28$282
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.
vie. 10/247:50 pmSBP - ORD
1 stop8h 34mAlaska Airlines
lun. 10/277:59 pmORD - SBP
2 stops22h 56mAlaska Airlines
Deal found 9/29$305
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.
mar. 11/182:59 pmSBP - ORD
1 stop7h 00mAlaska Airlines
sáb. 11/228:49 pmORD - SBP
1 stop28h 44mAlaska Airlines
Deal found 9/30$309
This American Airlines deal was found by Cheapflights users on 9/28. 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.
sáb. 11/1512:57 pmSBP - ORD
2 stops8h 40mAmerican Airlines
vie. 11/215:00 amORD - SBP
1 stop6h 22mAmerican Airlines
Deal found 9/28$327
This Alaska Airlines deal was found by Cheapflights users on 9/28. 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. 12/263:55 pmSBP - ORD
1 stop12h 34mAlaska Airlines
mié. 12/313:37 pmORD - SBP
1 stop9h 58mAlaska Airlines
Deal found 9/28$427
This Alaska Airlines deal was found by Cheapflights users on 9/28. 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. 12/263:55 pmSBP - ORD
1 stop12h 34mAlaska Airlines
mar. 12/308:59 pmORD - SBP
1 stop21h 45mAlaska Airlines
Deal found 9/28$432
This Alaska Airlines deal was found by Cheapflights users on 9/28. 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.
mar. 10/146:00 amSBP - ORD
1 stop10h 59mAlaska Airlines
sáb. 10/1810:00 amORD - SBP
1 stop14h 41mAlaska Airlines
Deal found 9/28$488

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 septiembre 30, 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

sáb. 11/15

5:27 pm-5:01 am

1 stop9h 34m

Chicago O'Hare Intl

vie. 11/21

8:00 am-2:02 pm

1 stop8h 02m

$277

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

mar. 11/18

5:27 pm-1:09 pm

1 stop17h 42m

Chicago O'Hare Intl

sáb. 11/22

8:49 pm-3:24 pm

1 stop20h 35m

$277

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

vie. 10/24

7:50 pm-6:24 am

1 stop8h 34m

Chicago O'Hare Intl

lun. 10/27

2:54 pm-11:26 pm

1 stop10h 32m

$277

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

sáb. 11/15

12:57 pm-11:37 pm

2 stops8h 40m

Chicago O'Hare Intl

jue. 11/20

5:00 am-12:12 pm

1 stop9h 12m

$282

San Luis ObispoPeoria

SBP - PIA

SBPPIA

San Luis Obispo County

sáb. 3/7

7:45 am-8:46 pm

2 stops11h 01m

Greater Peoria

mar. 3/10

2:30 pm-11:45 pm

2 stops11h 15m

$389

San Luis ObispoPeoria

SBP - PIA

SBPPIA

San Luis Obispo County

sáb. 3/7

12:30 pm-8:30 pm

1 stop6h 00m

Greater Peoria

mar. 3/10

10:53 am-10:13 pm

2 stops13h 20m

$465

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

lun. 10/27

7:56 pm-6:22 am

1 stop8h 26m

$138

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

lun. 10/27

4:36 pm-12:30 am

1 stop5h 54m

$139

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

jue. 12/25

5:00 am-2:55 pm

1 stop7h 55m

$184

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

lun. 12/1

6:07 pm-5:16 am

1 stop9h 09m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/29

Showing 1-10 of 14 results
1
2

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 septiembre 30, 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.

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 septiembre 30, 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
8,931 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

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
8,931 reviews
United Airlines
7.4
Good
8,931 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

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
8,931 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

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.

  • How long is the flight from San Luis Obispo to Illinois?

    For as low as $465, Alaska Airlines can have you in Illinois from San Luis Obispo in 6h. Airlines will cover a distance of 1717 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from San Luis Obispo to Illinois one-way?

    The cheapest airlines for a one-way flight from San Luis Obispo to Illinois are Alaska Airlines ($138), American Airlines ($139), and United Airlines ($184).

  • 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.

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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 septiembre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$274Average$443FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$362Average$642FlexibilityNo cancel feeOn-time69%

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