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San Luis Obispo

$144+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SBP
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
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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 June 18, 2025.

Round-trip from

$289
(American Airlines)

One-way from

$145
(American Airlines)

Popular in

February

Cheapest in

December

Average price

$679
From Illinois to San Luis Obispo County
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One-way flight from Illinois to San Luis Obispo County
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Highest demand for flights based on searches. 12% potential increase in price ($78 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Illinois to San Luis Obispo

Cheapest flights from Illinois to San Luis Obispo
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 June 18, 2025.

This American Airlines deal was found by Cheapflights users on 6/17. 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 9/26:00 amORD - SBP
1 stop7h 25mAmerican Airlines
Tue 9/912:24 pmSBP - ORD
1 stop7h 00mAmerican Airlines
Deal found 6/17$289
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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 10/176:00 amORD - SBP
1 stop14h 43mAlaska Airlines
Mon 10/207:35 pmSBP - ORD
1 stop8h 46mAlaska Airlines
Deal found 6/16$318
This Trip.com deal was found by Cheapflights users on 6/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/307:08 amORD - SBP
2 stops18h 05mMultiple Airlines
Wed 8/67:35 pmSBP - ORD
1 stop8h 05mMultiple Airlines
Deal found 6/15$326
This Hawaiian Airlines deal was found by Cheapflights users on 6/16. 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 8/1910:00 amORD - SBP
1 stop10h 43mHawaiian Airlines
Sun 8/246:29 pmSBP - ORD
1 stop10h 34mHawaiian Airlines
Deal found 6/16$335
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Mon 6/306:15 pmORD - SBP
1 stop7h 44mUnited Airlines
Fri 7/412:54 pmSBP - ORD
1 stop7h 40mUnited Airlines
Deal found 6/15$405
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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 11/64:01 pmSTL - SBP
1 stop28h 38mAlaska Airlines
Sun 11/167:31 pmSBP - STL
1 stop17h 34mAlaska Airlines
Deal found 6/16$435
This United Airlines deal was found by Cheapflights users on 6/17. 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 11/54:43 pmSTL - SBP
1 stop6h 41mUnited Airlines
Mon 11/175:15 amSBP - STL
1 stop14h 39mUnited Airlines
Deal found 6/17$442
This American Airlines deal was found by Cheapflights users on 6/16. 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 7/16:10 pmSTL - SBP
1 stop6h 25mAmerican Airlines
Sat 7/54:35 pmSBP - STL
1 stop5h 53mAmerican Airlines
Deal found 6/16$457
This American Airlines deal was found by Cheapflights users on 6/17. 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.
Wed 7/27:00 amCMI - SBP
1 stop6h 27mAmerican Airlines
Sun 7/612:15 pmSBP - CMI
1 stop7h 30mAmerican Airlines
Deal found 6/17$684

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 June 18, 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 9/2

6:00 am-11:25 am

1 stop7h 25m

San Luis Obispo County

Tue 9/9

12:24 pm-9:24 pm

1 stop7h 00m

$289

ChicagoSan Luis Obispo

ORD - SBP

ORDSBP

Chicago O'Hare Intl

Fri 10/17

6:00 am-6:43 pm

1 stop14h 43m

San Luis Obispo County

Mon 10/20

7:35 pm-6:21 am

1 stop8h 46m

$318

ChicagoSan Luis Obispo

ORD - SBP

ORDSBP

Chicago O'Hare Intl

Wed 7/30

7:08 am-11:13 pm

2 stops18h 05m

San Luis Obispo County

Wed 8/6

7:35 pm-5:40 am

1 stop8h 05m

$326

ChicagoSan Luis Obispo

ORD - SBP

ORDSBP

Chicago O'Hare Intl

Tue 8/19

10:00 am-6:43 pm

1 stop10h 43m

San Luis Obispo County

Sun 8/24

6:29 pm-7:03 am

1 stop10h 34m

$335

ChicagoSan Luis Obispo

ORD - SBP

ORDSBP

Chicago O'Hare Intl

Mon 6/30

6:15 pm-11:59 pm

1 stop7h 44m

San Luis Obispo County

Fri 7/4

12:54 pm-10:34 pm

1 stop7h 40m

$405

St. LouisSan Luis Obispo

STL - SBP

STLSBP

Lambert-St Louis

Thu 11/6

4:01 pm-6:39 pm

1 stop28h 38m

San Luis Obispo County

Sun 11/16

7:31 pm-3:05 pm

1 stop17h 34m

$435

St. LouisSan Luis Obispo

STL - SBP

STLSBP

Lambert-St Louis

Wed 11/5

4:43 pm-9:24 pm

1 stop6h 41m

San Luis Obispo County

Mon 11/17

5:15 am-9:54 pm

1 stop14h 39m

$442

St. LouisSan Luis Obispo

STL - SBP

STLSBP

Lambert-St Louis

Tue 7/1

6:10 pm-10:35 pm

1 stop6h 25m

San Luis Obispo County

Sat 7/5

4:35 pm-12:28 am

1 stop5h 53m

$457

ChampaignSan Luis Obispo

CMI - SBP

CMISBP

Champaign University-Willard

Wed 7/2

7:00 am-11:27 am

1 stop6h 27m

San Luis Obispo County

Sun 7/6

12:15 pm-9:45 pm

1 stop7h 30m

$684

ChicagoSan Luis Obispo

ORD - SBP

ORDSBP

Chicago O'Hare Intl

Wed 9/17

10:00 am-5:37 pm

1 stop9h 37m

$144

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Showing 1-10 of 16 results
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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 $526). 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 June 18, 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.

Rainfall in San Luis Obispo by month

Plan your trip to San Luis Obispo by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Luis Obispo ranges from 0.0 - 4.0 inches per month. December is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit San Luis Obispo when rainfall is around 0.0 in.

Temperature in San Luis Obispo by month

Plan your trip to San Luis Obispo by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Luis Obispo, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Luis Obispo

Get insights into the airlines that provide service to San Luis Obispo. 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 San Luis Obispo. Reviews last updated June 18, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Hawaiian Airlines and United Airlines from Illinois to San Luis Obispo by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,507 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,809 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

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

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $145. However, be on the lookout for offers from Alaska Airlines and United Airlines, as they are both options that can get you from Illinois to San Luis Obispo for a low price.

  • What are the most popular routes from Illinois to San Luis Obispo?

    Most travelers choose Chicago O'Hare Intl - San Luis Obispo County, Lambert-St Louis - San Luis Obispo County or Champaign University-Willard - San Luis Obispo County when deciding on the best route from Illinois to San Luis Obispo.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to San Luis Obispo 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 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 $526). 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

Traveling to a place near Illinois?

Book flights to Illinois if you plan to visit one of these locations
Morro Bay
Arroyo Grande
Avila Beach
San Simeon

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Alternative routes for Illinois to San Luis Obispo

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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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$326Average$484FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$518Average$646FlexibilityNo cancel feeOn-time69%

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