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$71+ Cheap flights from Illinois to San Francisco Bay Area

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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SFO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Illinois to San Francisco Bay Area

Keep the following information in mind while searching for Illinois to San Francisco Bay Area flight deals. Data was last updated June 12, 2025.

Round-trip from

$162
(KAYAK)

One-way from

$71
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$326
From Illinois to San Francisco Bay Area
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One-way flight from Illinois to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 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 Francisco Bay Area

Cheapest flights from Illinois to San Francisco Bay Area
Explore the most affordable flight options available from Illinois to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This KAYAK deal was found by Cheapflights users on 6/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/107:08 amORD - OAK
1 stop6h 39mSpirit Airlines
Mon 7/146:00 amOAK - ORD
1 stop6h 13mSpirit Airlines
Deal found 6/12$162
This Southwest deal was found by Cheapflights users on 6/11. 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.
Thu 9/1110:50 amMDW - OAK
1 stop6h 15mSouthwest
Mon 9/158:30 pmOAK - MDW
1 stop6h 40mSouthwest
Deal found 6/11$199
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 8/296:50 pmORD - SFO
Nonstop4h 43mAmerican Airlines
Mon 9/16:10 amSFO - ORD
Nonstop4h 20mAmerican Airlines
Deal found 6/11$203
This Southwest deal was found by Cheapflights users on 6/11. 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.
Sat 9/69:45 amMDW - SFO
2 stops10h 35mSouthwest
Sat 9/136:20 pmSFO - MDW
1 stop8h 50mSouthwest
Deal found 6/11$204
This Southwest deal was found by Cheapflights users on 6/9. 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.
Sat 8/166:15 amORD - SFO
1 stop9h 30mSouthwest
Sat 8/239:05 pmSFO - ORD
1 stop12h 45mSouthwest
Deal found 6/9$204
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 8/127:18 pmORD - SFO
Nonstop4h 48mAlaska Airlines
Tue 9/167:55 pmSFO - ORD
1 stop9h 08mAlaska Airlines
Deal found 6/10$208
This Hawaiian Airlines deal was found by Cheapflights users on 6/12. 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 7/17:18 pmORD - SFO
Nonstop4h 48mHawaiian Airlines
Tue 7/2911:55 amSFO - ORD
Nonstop4h 23mHawaiian Airlines
Deal found 6/12$218
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2810:15 pmORD - OAK
2 stops13h 21mMultiple Airlines
Thu 7/311:59 pmOAK - ORD
1 stop10h 52mMultiple Airlines
Deal found 6/10$220
This Kissandfly.com deal was found by Cheapflights users on 6/12. 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.
Tue 7/17:18 pmORD - SFO
Nonstop4h 48mMultiple Airlines
Sat 7/57:20 amSFO - ORD
1 stop13h 47mMultiple Airlines
Deal found 6/12$231
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/285:12 pmORD - SFO
1 stop7h 52mFrontier
Sat 10/181:20 pmSFO - ORD
1 stop7h 00mFrontier
Deal found 6/10$240
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 8/306:20 amORD - OAK
1 stop9h 16mAlaska Airlines
Wed 9/37:58 pmOAK - ORD
1 stop9h 05mAlaska Airlines
Deal found 6/10$240
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:31 pmMDW - SFO
1 stop7h 48mFrontier
Mon 8/2510:29 pmSFO - MDW
1 stop8h 33mFrontier
Deal found 6/10$252

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to San Francisco Bay Area 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 12, 2025.
Use the filters below to find and compare flights from Illinois to San Francisco Bay Area that are best for you.

Fly from

Illinois

Fly to

San Francisco Bay Area

Route

Depart

Return

Price

ChicagoOakland

ORD - OAK

ORDOAK

Chicago O'Hare Intl

Thu 7/10

7:08 am-11:47 am

1 stop6h 39m

Oakland

Mon 7/14

6:00 am-2:13 pm

1 stop6h 13m

$162

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Fri 8/29

6:50 pm-9:33 pm

Nonstop4h 43m

San Francisco

Mon 9/1

6:10 am-12:30 pm

Nonstop4h 20m

$203

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Sat 9/6

9:45 am-6:20 pm

2 stops10h 35m

San Francisco

Sat 9/13

6:20 pm-5:10 am

1 stop8h 50m

$204

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Sat 8/16

6:15 am-1:45 pm

1 stop9h 30m

San Francisco

Sat 8/23

9:05 pm-11:50 am

1 stop12h 45m

$204

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 8/12

7:18 pm-10:06 pm

Nonstop4h 48m

San Francisco

Tue 9/16

7:55 pm-7:03 am

1 stop9h 08m

$208

ChicagoOakland

ORD - OAK

ORDOAK

Chicago O'Hare Intl

Sat 6/28

10:15 pm-9:36 am

2 stops13h 21m

Oakland

Thu 7/3

11:59 pm-12:51 pm

1 stop10h 52m

$220

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 8/6

7:00 am-12:24 pm

1 stop7h 24m

San Francisco

Sun 8/10

11:55 am-6:18 pm

Nonstop4h 23m

$227

ChicagoOakland

MDW - OAK

MDWOAK

Chicago Midway

Thu 7/3

7:20 am-9:50 am

Nonstop4h 30m

Oakland

Mon 7/7

9:15 pm-5:00 am

1 stop5h 45m

$227

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 7/1

7:18 pm-10:06 pm

Nonstop4h 48m

San Francisco

Sat 7/5

7:20 am-11:07 pm

1 stop13h 47m

$231

ChicagoOakland

ORD - OAK

ORDOAK

Chicago O'Hare Intl

Sat 8/30

6:20 am-1:36 pm

1 stop9h 16m

Oakland

Wed 9/3

7:58 pm-7:03 am

1 stop9h 05m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to San Francisco Bay Area

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to San Francisco Bay Area (average of $276). Flying from Illinois to San Francisco Bay Area in June is currently the most expensive (average of $364). 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 XIH?

Find hourly flight availability from Illinois to San Francisco Bay Area. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 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 Francisco Bay Area as you normally would.

Weekly flight availability from Illinois to San Francisco Bay Area

Explore weekly flight availability from Illinois to San Francisco Bay Area. 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 June 12, 2025.

The most flights from USIL to zzXIH are scheduled on a Thursday (93 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (63 on average).

Rainfall in San Francisco Bay Area by month

Plan your trip to San Francisco Bay Area by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco Bay Area ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco Bay Area when rainfall is around 0.0 in.

Temperature in San Francisco Bay Area by month

Plan your trip to San Francisco Bay Area by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco Bay Area, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 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 Francisco Bay Area

Get insights into the airlines that provide service to San Francisco Bay Area. 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 Francisco Bay Area. Reviews last updated June 12, 2025.
To help decide which airline to fly from Illinois to San Francisco Bay Area, see what other customers have to say about Alaska Airlines, Southwest and Delta. 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

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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 Francisco Bay Area. 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 Illinois to San Francisco Bay Area one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $71. However, be on the lookout for offers from Southwest and United Airlines, as they are both options that can get you from Illinois to San Francisco Bay Area for a low price.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Illinois to San Francisco Bay Area (average of $276). Flying from Illinois to San Francisco Bay Area in June is currently the most expensive (average of $364). 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 Illinois to San Francisco Bay Area

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Illinois to San Francisco Bay Area

Discover the top 8 airlines that operate flights from Illinois to San Francisco Bay Area. 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$242FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$108Average$226FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$127Average$239FlexibilityNo cancel feeOn-time65%
DeltaCheapest$128Average$393FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$167Average$324FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$179Average$439FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$197Average$482FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$246Average$433FlexibilityNo cancel feeOn-time63%

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