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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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$204
(Southwest)

One-way from

$56
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$354
From San Francisco Bay Area to Illinois
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One-way flight from San Francisco Bay Area to Illinois
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Highest demand for flights based on searches. 6% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 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 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 June 12, 2025.

This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/302:05 pmOAK - ORD
1 stop7h 35mSouthwest
Fri 7/46:15 amORD - OAK
2 stops10h 10mSouthwest
Deal found 6/10$204
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:08 pmOAK - ORD
2 stops8h 35mSpirit Airlines
Mon 9/226:00 amORD - OAK
2 stops8h 13mSpirit Airlines
Deal found 6/10$205
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2311:25 pmSFO - ORD
Nonstop4h 14mUnited Airlines
Mon 7/286:20 pmORD - SFO
Nonstop4h 49mUnited Airlines
Deal found 6/11$207
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1311:55 amSFO - ORD
Nonstop4h 23mAlaska Airlines
Tue 8/191:03 pmORD - SFO
1 stop10h 09mAlaska Airlines
Deal found 6/11$208
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 8/166:50 amSFO - MDW
1 stop9h 35mSouthwest
Tue 8/194:00 pmMDW - SFO
2 stops7h 40mSouthwest
Deal found 6/11$209
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.
Tue 7/152:45 pmSFO - ORD
1 stop7h 14mHawaiian Airlines
Tue 7/227:18 pmORD - SFO
Nonstop4h 48mHawaiian Airlines
Deal found 6/10$209
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/309:00 pmSFO - ORD
1 stop12h 50mSouthwest
Wed 7/95:25 pmORD - SFO
1 stop7h 45mSouthwest
Deal found 6/10$213
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 8/52:38 pmOAK - ORD
1 stop7h 21mAlaska Airlines
Wed 8/66:00 amORD - OAK
1 stop9h 43mAlaska Airlines
Deal found 6/10$216
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1511:08 pmSFO - ORD
Nonstop4h 16mAmerican Airlines
Wed 8/206:45 amORD - SFO
Nonstop4h 33mAmerican Airlines
Deal found 6/12$219
This WAYA 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/146:40 pmSFO - ORD
1 stop9h 23mMultiple Airlines
Tue 7/227:18 pmORD - SFO
Nonstop4h 48mMultiple Airlines
Deal found 6/12$221
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/79:15 pmOAK - MDW
1 stop5h 45mSouthwest
Sat 7/127:50 amMDW - OAK
1 stop6h 15mSouthwest
Deal found 6/10$227
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.
Thu 7/106:00 amOAK - ORD
1 stop6h 13mMultiple Airlines
Thu 7/176:00 amORD - OAK
1 stop13h 15mMultiple Airlines
Deal found 6/10$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 June 12, 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

Mon 6/30

2:05 pm-11:40 pm

1 stop7h 35m

Chicago O'Hare Intl

Fri 7/4

6:15 am-2:25 pm

2 stops10h 10m

$204

OaklandChicago

OAK - ORD

OAKORD

Oakland

Wed 9/10

1:08 pm-11:43 pm

2 stops8h 35m

Chicago O'Hare Intl

Mon 9/22

6:00 am-12:13 pm

2 stops8h 13m

$205

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 7/23

11:25 pm-5:39 am

Nonstop4h 14m

Chicago O'Hare Intl

Mon 7/28

6:20 pm-9:09 pm

Nonstop4h 49m

$207

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 8/13

6:53 pm-5:40 am

1 stop8h 47m

Chicago O'Hare Intl

Sat 8/16

7:18 pm-10:06 pm

Nonstop4h 48m

$208

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Sat 8/16

6:50 am-6:25 pm

1 stop9h 35m

Chicago Midway

Tue 8/19

4:00 pm-9:40 pm

2 stops7h 40m

$209

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 6/30

9:00 pm-11:50 am

1 stop12h 50m

Chicago O'Hare Intl

Wed 7/9

5:25 pm-11:10 pm

1 stop7h 45m

$213

OaklandChicago

OAK - ORD

OAKORD

Oakland

Tue 8/5

2:38 pm-11:59 pm

1 stop7h 21m

Chicago O'Hare Intl

Wed 8/6

6:00 am-1:43 pm

1 stop9h 43m

$216

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 8/15

11:08 pm-5:24 am

Nonstop4h 16m

Chicago O'Hare Intl

Wed 8/20

6:45 am-9:18 am

Nonstop4h 33m

$219

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 7/14

6:40 pm-6:03 am

1 stop9h 23m

Chicago O'Hare Intl

Tue 7/22

7:18 pm-10:06 pm

Nonstop4h 48m

$221

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 8/5

7:49 pm-5:40 am

1 stop7h 51m

Chicago O'Hare Intl

Thu 8/7

7:18 pm-10:06 pm

Nonstop4h 48m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 60 results
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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 June 12, 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 June 12, 2025.

The most flights from zzXIH to USIL are scheduled on a Monday (93 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (52 on average).

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 June 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from San Francisco Bay Area to Illinois. You can also see how each airline stacks up 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

Entertainment

7.1

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

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 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 $95 and $104 on Southwest and Alaska 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

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Alternative routes for San Francisco Bay Area to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$238FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$108Average$251FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$108Average$288FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$133Average$435FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$138Average$370FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$197Average$492FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$209Average$424FlexibilityNo cancel feeOn-time63%
DeltaCheapest$236Average$335FlexibilityNo cancel feeOn-timeN/A

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