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$65+ 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from San Francisco Bay Area to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco Bay Area (zzXIH) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

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 November 21, 2024.

This CheapOair deal was found by Cheapflights users on 11/21. 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.
Fri 12/62:28 pmSJC - STL
1 stop15h 45mFrontier
Sun 12/88:34 pmSTL - SJC
1 stop21h 44mFrontier
Deal found 11/21$158
This Frontier deal was found by Cheapflights users on 11/20. 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.
Fri 12/132:28 pmSJC - MDW
1 stop7h 45mFrontier
Sun 12/157:15 amMDW - SJC
1 stop6h 53mFrontier
Deal found 11/20$168
This Frontier deal was found by Cheapflights users on 11/19. 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.
Fri 12/62:28 pmSJC - ORD
1 stop8h 07mFrontier
Mon 12/97:25 amORD - SJC
1 stop6h 43mFrontier
Deal found 11/19$168
This Booking.com deal was found by Cheapflights users on 11/20. 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.
Fri 12/133:56 pmSJC - ORD
1 stop11h 34mMultiple Airlines
Mon 12/167:25 amORD - SJC
1 stop6h 43mMultiple Airlines
Deal found 11/20$169
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/78:44 pmSJC - ORD
1 stop6h 46mSpirit Airlines
Wed 12/119:10 pmORD - SJC
2 stops22h 53mSpirit Airlines
Deal found 11/20$171
This Cheapflightsfares deal was found by Cheapflights users on 11/20. 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.
Fri 12/136:05 amSFO - ORD
1 stop16h 30mFrontier
Tue 12/178:26 pmORD - SFO
1 stop13h 21mFrontier
Deal found 11/20$212
This Expedia deal was found by Cheapflights users on 11/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/89:34 amSFO - ORD
1 stop13h 05mMultiple Airlines
Thu 12/125:59 pmORD - SFO
Nonstop4h 59mMultiple Airlines
Deal found 11/20$213
This Frontier deal was found by Cheapflights users on 11/20. 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.
Tue 12/1710:41 amSFO - MDW
1 stop11h 46mFrontier
Fri 1/38:27 pmMDW - SFO
1 stop13h 42mFrontier
Deal found 11/20$214
This United Airlines deal was found by Cheapflights users on 11/21. 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.
Thu 12/1210:50 pmSFO - ORD
Nonstop4h 16mUnited Airlines
Tue 12/176:50 amORD - SFO
Nonstop4h 48mUnited Airlines
Deal found 11/21$217
This Cheapflightsfares deal was found by Cheapflights users on 11/20. 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.
Tue 12/33:18 pmOAK - ORD
1 stop11h 17mSpirit Airlines
Fri 12/69:53 pmORD - OAK
1 stop13h 32mSpirit Airlines
Deal found 11/20$236
This United Airlines deal was found by Cheapflights users on 11/20. 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 12/1112:30 amSFO - STL
1 stop7h 17mUnited Airlines
Fri 12/137:00 amSTL - SFO
Nonstop4h 36mUnited Airlines
Deal found 11/20$246
This FlightHub deal was found by Cheapflights users on 11/19. 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.
Thu 12/2610:11 pmSFO - STL
1 stop20h 18mFrontier
Thu 1/210:09 pmSTL - SFO
1 stop11h 50mFrontier
Deal found 11/19$248

Find flights from San Francisco Bay Area to Illinois within your budget

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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Fri 12/6

2:28 pm-8:13 am

1 stop15h 45m

Lambert-St Louis

Sun 12/8

8:34 pm-4:18 pm

1 stop21h 44m

$158

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Fri 12/13

2:28 pm-12:13 am

1 stop7h 45m

Chicago Midway

Sun 12/15

7:15 am-12:08 pm

1 stop6h 53m

$168

San JoseChicago

SJC - ORD

SJCORD

San Jose

Fri 12/6

2:28 pm-12:35 am

1 stop8h 07m

Chicago O'Hare Intl

Mon 12/9

7:25 am-12:08 pm

1 stop6h 43m

$168

San JoseChicago

SJC - ORD

SJCORD

San Jose

Fri 12/13

3:56 pm-5:30 am

1 stop11h 34m

Chicago O'Hare Intl

Mon 12/16

7:25 am-12:08 pm

1 stop6h 43m

$169

San JoseChicago

SJC - ORD

SJCORD

San Jose

Sat 12/7

8:44 pm-5:30 am

1 stop6h 46m

Chicago O'Hare Intl

Wed 12/11

9:10 pm-6:03 pm

2 stops22h 53m

$171

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 3/4

11:12 am-11:39 pm

1 stop10h 27m

Chicago O'Hare Intl

Tue 3/11

7:00 pm-10:10 pm

Nonstop5h 10m

$209

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 12/13

6:05 am-12:35 am

1 stop16h 30m

Chicago O'Hare Intl

Tue 12/17

8:26 pm-7:47 am

1 stop13h 21m

$212

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 12/17

10:41 am-12:27 am

1 stop11h 46m

Chicago Midway

Fri 1/3

8:27 pm-8:09 am

1 stop13h 42m

$214

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 1/23

6:15 am-12:42 pm

Nonstop4h 27m

Chicago O'Hare Intl

Sat 1/25

6:30 am-9:24 am

Nonstop4h 54m

$217

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 1/21

5:20 am-11:36 am

Nonstop4h 16m

Chicago O'Hare Intl

Mon 2/3

12:39 pm-3:28 pm

Nonstop4h 49m

$218

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

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.

Travel insights for flights from San Francisco Bay Area to Illinois

Get recent, data-driven insights about flights from San Francisco Bay Area to Illinois including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from San Francisco Bay Area to Illinois (average of $232). Flying from San Francisco Bay Area to Illinois in June is currently the most expensive (average of $308). 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 November 21, 2024.

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 November 21, 2024.

The most flights from zzXIH to USIL are scheduled on a Thursday (62 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (26 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 November 21, 2024.
Read reviews from past customers who have flown Spirit Airlines, United Airlines and American Airlines 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.
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
5,005 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,464 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,755 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

JetBlue
7.5
Good
3,389 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

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 Frontier. According to our data, you can fly for as low as $65. Users have also found prices from $70 and $99 on Spirit Airlines and Southwest, 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, September is the cheapest month in which you can book a flight from San Francisco Bay Area to Illinois (average of $232). Flying from San Francisco Bay Area to Illinois in June is currently the most expensive (average of $308). 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 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 7 airlines flying from San Francisco Bay Area to Illinois

Discover the top 7 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 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$72Average$227FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$100Average$335FlexibilityNo cancel feeOn-time75%
Spirit AirlinesCheapest$111Average$266FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$185Average$478FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$193Average$499FlexibilityNo cancel feeOn-time71%
DeltaCheapest$204Average$419FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$210Average$437FlexibilityNo cancel feeOn-time63%
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