HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$177+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
SBP — ORD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Luis Obispo to Illinois with Cheapflights

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 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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$344
(Alaska Airlines)

One-way from

$177
(Hawaiian Airlines)

Popular in

March

Cheapest in

February

Average price

$425
Provider with most accurate pricing for San Luis Obispo County-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Luis Obispo County-Chicago (CHI) flights.
Search Deals
From San Luis Obispo County to Illinois
Search Deals
One-way flight from San Luis Obispo County to Illinois
Search Deals
High demand for flights, 7% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 17, 2025.

This Alaska Airlines deal was found by Cheapflights users on 4/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/237:35 pmSBP - ORD
1 stop24h 48mAlaska Airlines
Tue 5/277:51 pmORD - SBP
2 stops19h 34mAlaska Airlines
Deal found 4/17$344
This United Airlines deal was found by Cheapflights users on 4/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/142:21 pmSBP - ORD
1 stop6h 39mUnited Airlines
Sat 5/175:55 pmORD - SBP
1 stop8h 04mUnited Airlines
Deal found 4/16$359
This American Airlines deal was found by Cheapflights users on 4/16. 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.
Wed 5/147:09 pmSBP - ORD
1 stop8h 04mAmerican Airlines
Sat 5/175:00 amORD - SBP
2 stops9h 00mAmerican Airlines
Deal found 4/16$364
This Hawaiian Airlines deal was found by Cheapflights users on 4/17. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/287:14 pmSBP - ORD
1 stop8h 51mHawaiian Airlines
Wed 4/3012:00 pmORD - SBP
1 stop8h 22mHawaiian Airlines
Deal found 4/17$858

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 April 17, 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

Fri 5/23

7:35 pm-10:23 pm

1 stop24h 48m

Chicago O'Hare Intl

Tue 5/27

7:51 pm-1:25 pm

2 stops19h 34m

$344

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

Wed 5/14

2:21 pm-11:00 pm

1 stop6h 39m

Chicago O'Hare Intl

Sat 5/17

5:55 pm-11:59 pm

1 stop8h 04m

$359

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

Wed 5/14

7:09 pm-5:13 am

1 stop8h 04m

Chicago O'Hare Intl

Sat 5/17

5:00 am-12:00 pm

2 stops9h 00m

$364

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

Mon 4/28

7:14 pm-6:05 am

1 stop8h 51m

Chicago O'Hare Intl

Wed 4/30

12:00 pm-6:22 pm

1 stop8h 22m

$858

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

Wed 5/7

7:14 pm-6:05 am

1 stop8h 51m

$177

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

Fri 5/9

7:14 pm-2:48 pm

1 stop17h 34m

$183

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

Wed 5/7

12:43 pm-11:56 pm

2 stops9h 13m

$185

San Luis ObispoChicago

SBP - ORD

SBPORD

San Luis Obispo County

Sat 4/26

5:00 am-5:10 pm

2 stops10h 10m

$415

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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 April 17, 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 17, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Hawaiian Airlines and United Airlines from San Luis Obispo to Illinois 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
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,887 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,380 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • 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 Hawaiian Airlines ($177), Alaska Airlines ($183), and American Airlines ($185).

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Luis Obispo to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to John F Kennedy Intl flights
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
Los Angeles to Boston flights
Los Angeles to Seattle flights
San Francisco to Newark flights
Los Angeles to LaGuardia flights
San Jose to Los Angeles flights
Los Angeles to Las Vegas flights
San Francisco to Los Angeles flights
Santa Ana to Las Vegas flights
Los Angeles to Miami flights
San Francisco to Seattle flights
San Francisco to Las Vegas flights
Los Angeles to San Jose flights
San Francisco to LaGuardia flights
Burbank to Las Vegas flights
Ontario to John F Kennedy Intl flights
Los Angeles to San Francisco flights
Los Angeles to Orlando flights
Oakland to Los Angeles flights
San Francisco to O'Hare Intl flights
Los Angeles to Reagan-National flights
Los Angeles to Oakland flights
Santa Ana to Seattle flights
Los Angeles to Dulles Intl flights
Los Angeles to Portland flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to O'Hare Intl flights
Oakland to Las Vegas flights
San Francisco to Ontario flights
San Francisco to Dallas/Fort Worth flights
Oakland to Seattle flights
Burbank to Newark flights
San Francisco to Boston flights
San Francisco to Honolulu flights
San Diego to Seattle flights
Oakland to Santa Ana flights
San Francisco to Dulles Intl flights
Santa Ana to Oakland flights
Ontario to Seattle flights
Santa Ana to San Francisco flights
San Jose to Las Vegas flights
San Jose to Seattle flights
Ontario to Newark flights
Ontario to San Francisco flights
San Francisco to Santa Ana flights
Los Angeles to Fort Lauderdale flights
San Diego to John F Kennedy Intl flights

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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$338Average$550FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$362Average$646FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.