HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$56+ Cheap flights from San Francisco Bay Area 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Francisco Bay Area 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 Francisco Bay Area to Illinois

Keep the following information in mind while searching for San Francisco Bay Area to Illinois flight deals. Data was last updated julio 31, 2025.

Round-trip from

$181
(CheapOair)

One-way from

$56
(FlightHub)

Popular in

December

Cheapest in

February

Average price

$357
From San Francisco Bay Area to Illinois
Search Deals
One-way flight from San Francisco Bay Area to Illinois
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from San Francisco Bay Area to Illinois

Cheapest flights from San Francisco Bay Area to Illinois
Explore the most affordable flight options available from San Francisco Bay Area to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 31, 2025.

This CheapOair deal was found by Cheapflights users on 7/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/410:56 amOAK - ORD
2 stops15h 53mSpirit Airlines
sáb. 10/115:46 pmORD - OAK
1 stop7h 46mSpirit Airlines
Deal found 7/29$181
This American Airlines deal was found by Cheapflights users on 7/31. 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. 8/302:26 pmSFO - ORD
Nonstop4h 22mAmerican Airlines
dom. 8/316:45 amORD - SFO
Nonstop4h 30mAmerican Airlines
Deal found 7/31$205
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/47:15 amSFO - MDW
Nonstop4h 05mSouthwest
mié. 9/103:50 pmMDW - SFO
Nonstop4h 35mSouthwest
Deal found 7/30$207
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/196:40 amOAK - MDW
Nonstop4h 05mSouthwest
sáb. 10/253:55 pmMDW - OAK
Nonstop4h 35mSouthwest
Deal found 7/29$207
This Southwest deal was found by Cheapflights users on 7/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/317:15 amSFO - ORD
1 stop8h 40mSouthwest
sáb. 9/64:20 pmORD - SFO
1 stop7h 05mSouthwest
Deal found 7/31$208
This Kissandfly.com deal was found by Cheapflights users on 7/30. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/316:10 amSFO - ORD
Nonstop4h 20mHawaiian Airlines
sáb. 9/63:20 pmORD - SFO
1 stop9h 03mHawaiian Airlines
Deal found 7/30$211
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/265:35 amOAK - ORD
1 stop6h 35mSouthwest
dom. 8/311:50 pmORD - OAK
1 stop10h 30mSouthwest
Deal found 7/30$213
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
mié. 10/810:26 amSFO - ORD
1 stop11h 33mAlaska Airlines
mié. 10/158:20 amORD - SFO
1 stop7h 41mAlaska Airlines
Deal found 7/29$216
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
mié. 10/227:06 pmOAK - ORD
1 stop7h 55mAlaska Airlines
mié. 11/128:00 amORD - OAK
1 stop7h 55mAlaska Airlines
Deal found 7/29$216
This United Airlines deal was found by Cheapflights users on 7/31. 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. 9/266:35 pmSFO - ORD
Nonstop4h 19mUnited Airlines
dom. 9/286:15 amORD - SFO
Nonstop4h 41mUnited Airlines
Deal found 7/31$217
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/188:13 amOAK - ORD
1 stop11h 03mMultiple Airlines
jue. 8/219:45 pmORD - OAK
1 stop27h 42mMultiple Airlines
Deal found 7/29$230
This Frontier deal was found by Cheapflights users on 7/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/236:34 amSFO - ORD
1 stop15h 05mFrontier
sáb. 8/307:00 amORD - SFO
1 stop17h 33mFrontier
Deal found 7/30$236

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco Bay Area 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 julio 31, 2025.
Use the filters below to find and compare flights from San Francisco Bay Area to Illinois that are best for you.

Fly from

San Francisco Bay Area

Fly to

Illinois

Route

Depart

Return

Price

OaklandChicago

OAK - ORD

OAKORD

Oakland

sáb. 10/4

10:56 am-4:49 am

2 stops15h 53m

Chicago O'Hare Intl

sáb. 10/11

5:46 pm-11:32 pm

1 stop7h 46m

$181

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

sáb. 8/30

2:26 pm-8:48 pm

Nonstop4h 22m

Chicago O'Hare Intl

dom. 8/31

6:45 am-9:15 am

Nonstop4h 30m

$205

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

jue. 9/4

7:15 am-1:20 pm

Nonstop4h 05m

Chicago Midway

mié. 9/10

3:50 pm-6:25 pm

Nonstop4h 35m

$207

OaklandChicago

OAK - MDW

OAKMDW

Oakland

dom. 10/19

6:40 am-12:45 pm

Nonstop4h 05m

Chicago Midway

sáb. 10/25

3:55 pm-6:30 pm

Nonstop4h 35m

$207

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

dom. 8/31

7:15 am-5:55 pm

1 stop8h 40m

Chicago O'Hare Intl

sáb. 9/6

4:20 pm-9:25 pm

1 stop7h 05m

$208

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

dom. 8/31

6:10 am-12:30 pm

Nonstop4h 20m

Chicago O'Hare Intl

sáb. 9/6

3:20 pm-10:23 pm

1 stop9h 03m

$211

OaklandChicago

OAK - ORD

OAKORD

Oakland

mar. 8/26

5:35 am-2:10 pm

1 stop6h 35m

Chicago O'Hare Intl

dom. 8/31

1:50 pm-10:20 pm

1 stop10h 30m

$213

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

mié. 10/8

10:26 am-11:59 pm

1 stop11h 33m

Chicago O'Hare Intl

mié. 10/15

8:20 am-2:01 pm

1 stop7h 41m

$216

OaklandChicago

OAK - ORD

OAKORD

Oakland

mié. 10/22

7:06 pm-5:01 am

1 stop7h 55m

Chicago O'Hare Intl

mié. 11/12

8:00 am-1:55 pm

1 stop7h 55m

$216

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

vie. 9/26

6:35 pm-12:54 am

Nonstop4h 19m

Chicago O'Hare Intl

dom. 9/28

6:15 am-8:56 am

Nonstop4h 41m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from San Francisco Bay Area to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from San Francisco Bay Area 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 Francisco Bay Area to Illinois

What is the cheapest month to book a flight from San Francisco Bay Area to Illinois?

Currently, August is the cheapest month in which you can book a flight from San Francisco Bay Area to Illinois (average of $245). Flying from San Francisco Bay Area 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 XIH to IL?

Find hourly flight availability from San Francisco Bay Area 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 julio 31, 2025.

When flying from San Francisco Bay Area to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from San Francisco Bay Area to Illinois

Explore weekly flight availability from San Francisco Bay Area to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated julio 31, 2025.

The most flights from zzXIH to USIL are scheduled on a Thursday (92 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (43 on average).

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 julio 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from San Francisco Bay Area to Illinois have to say. You can also see how each airline compares 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

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

Comfort

7.8

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 San Francisco Bay Area to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from San Francisco Bay Area to Illinois one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $56. Users have also found prices from $99 and $103 on Southwest and Hawaiian Airlines, respectively.

  • Can I find deals for flights from San Francisco Bay Area to Illinois that include hotel bookings?

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

  • How can I find direct flights from San Francisco Bay Area to Illinois?

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

  • Can I find deals for business class flights from San Francisco Bay Area to Illinois?

    Yes. Cheapflights offers flight deals from San Francisco Bay Area 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 Francisco Bay Area to Illinois?

    Currently, August is the cheapest month in which you can book a flight from San Francisco Bay Area to Illinois (average of $245). Flying from San Francisco Bay Area 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 Francisco Bay Area to Illinois

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

Top 8 airlines flying from San Francisco Bay Area to Illinois

Discover the top 8 airlines that operate flights from San Francisco Bay Area 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$237FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$101Average$218FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$108Average$288FlexibilityNo cancel feeOn-time85%
DeltaCheapest$128Average$327FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$133Average$440FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$138Average$359FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$185Average$413FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$197Average$489FlexibilityNo cancel feeOn-time71%

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.