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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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Dec 28 — Jan 41
Sat 12/28
Sat 1/4
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 December 23, 2024.

Round-trip from

$108
(Cheapflightsfares)

One-way from

$65
(Cheapflightsfares)
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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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 December 23, 2024.

This Cheapflightsfares deal was found by Cheapflights users on 12/23. 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 12/319:25 pmOAK - ORD
1 stop6h 05mSpirit Airlines
Sat 1/118:00 amORD - OAK
1 stop15h 35mSpirit Airlines
Deal found 12/23$232
This Orbitz deal was found by Cheapflights users on 12/23. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/314:29 pmSJC - ORD
1 stop11h 01mSpirit Airlines
Sat 1/118:00 amORD - SJC
1 stop13h 07mSpirit Airlines
Deal found 12/23$241
This United Airlines deal was found by Cheapflights users on 12/23. 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.
Tue 12/314:55 pmSFO - ORD
Nonstop4h 26mUnited Airlines
Sat 1/116:30 amORD - SFO
Nonstop4h 54mUnited Airlines
Deal found 12/23$266
This American Airlines deal was found by Cheapflights users on 12/22. 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 12/2511:55 amSJC - STL
1 stop8h 26mAmerican Airlines
Wed 1/227:00 amSTL - SJC
1 stop8h 35mAmerican Airlines
Deal found 12/22$307
This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3112:10 amSFO - ORD
1 stop7h 14mDelta
Sat 1/117:15 amORD - SFO
1 stop7h 29mDelta
Deal found 12/22$314
This Kiwi.com deal was found by Cheapflights users on 12/22. 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.
Wed 12/253:03 pmSFO - ORD
1 stop26h 31mFrontier
Sun 1/51:07 pmORD - SFO
1 stop13h 14mFrontier
Deal found 12/22$317
This Gotogate deal was found by Cheapflights users on 12/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/3012:30 pmSJC - ORD
1 stop9h 16mFrontier
Thu 1/21:07 pmORD - SJC
1 stop24h 38mFrontier
Deal found 12/21$326
This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/257:00 amSJC - STL
1 stop7h 12mDelta
Wed 1/226:00 amSTL - SJC
2 stops9h 43mDelta
Deal found 12/22$339
This Alaska Airlines deal was found by Cheapflights users on 12/23. 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 12/318:35 pmSFO - ORD
1 stop6h 55mAlaska Airlines
Sat 1/116:55 pmORD - SFO
2 stops19h 57mAlaska Airlines
Deal found 12/23$341
This FlightHub deal was found by Cheapflights users on 12/22. 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.
Tue 12/318:10 pmSJC - ORD
1 stop7h 20mMultiple Airlines
Fri 1/36:00 amORD - SJC
1 stop7h 45mMultiple Airlines
Deal found 12/22$343
This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3112:10 amSFO - MDW
1 stop8h 58mDelta
Mon 1/65:07 pmMDW - SFO
1 stop8h 47mDelta
Deal found 12/22$367
This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2310:59 pmSFO - STL
1 stop8h 34mDelta
Wed 12/256:29 amSTL - SFO
1 stop10h 19mDelta
Deal found 12/22$368

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 2,558,603 searches. Data last updated December 23, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OaklandChicago

OAK - ORD

OAKORD

Oakland

Wed 1/15

7:02 pm-5:31 am

1 stop8h 29m

Chicago O'Hare Intl

Wed 1/22

1:39 pm-9:35 pm

1 stop9h 56m

$108

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Fri 2/21

4:03 pm-12:17 am

1 stop6h 14m

Chicago Midway

Sun 2/23

8:44 pm-4:46 pm

1 stop22h 02m

$180

San JoseChicago

SJC - ORD

SJCORD

San Jose

Wed 1/15

9:34 pm-5:31 am

1 stop5h 57m

Chicago O'Hare Intl

Fri 1/17

10:47 pm-10:41 am

1 stop13h 54m

$180

San JoseChicago

SJC - ORD

SJCORD

San Jose

Thu 2/27

7:34 am-12:44 am

3 stops39h 10m

Chicago O'Hare Intl

Wed 3/5

6:50 am-3:03 pm

1 stop10h 13m

$182

San JoseChicago

SJC - ORD

SJCORD

San Jose

Fri 1/17

1:11 pm-12:32 am

1 stop9h 21m

Chicago O'Hare Intl

Mon 1/20

7:50 am-12:11 pm

1 stop6h 21m

$208

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 1/23

10:00 am-4:27 pm

Nonstop4h 27m

Chicago O'Hare Intl

Mon 1/27

6:55 pm-9:54 pm

Nonstop4h 59m

$217

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Thu 2/20

6:15 am-12:25 pm

Nonstop4h 10m

Chicago Midway

Thu 2/27

9:30 am-12:25 pm

Nonstop4h 55m

$218

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 2/7

6:05 am-12:32 am

1 stop16h 27m

Chicago O'Hare Intl

Fri 3/7

6:30 am-1:33 pm

1 stop9h 03m

$218

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Sat 2/15

10:59 pm-5:31 am

1 stop28h 32m

Chicago Midway

Tue 2/18

7:05 am-1:33 pm

1 stop8h 28m

$219

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 2/4

8:20 am-5:59 pm

1 stop7h 39m

Chicago O'Hare Intl

Fri 2/7

7:25 am-12:47 pm

1 stop7h 22m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

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, 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 $317). 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 December 23, 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 December 23, 2024.

The most flights from zzXIH to USIL are scheduled on a Sunday (73 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (33 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 December 23, 2024.
Read reviews from past customers who have flown Delta, Spirit Airlines and Alaska 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
4,780 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

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
4,780 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

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
9,549 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

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
8,588 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

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
9,022 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

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

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Boarding

8.2

Comfort

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 Spirit Airlines. According to our data, you can fly for as low as $65. Users have also found prices from $80 and $109 on Frontier 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, 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 $317). 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 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 2,558,603 searches. Data last updated December 23, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$82Average$235FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$100Average$331FlexibilityNo cancel feeOn-time75%
Spirit AirlinesCheapest$112Average$266FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$185Average$476FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$198Average$503FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$219Average$468FlexibilityNo cancel feeOn-time63%
DeltaCheapest$235Average$430FlexibilityNo cancel feeOn-timeN/A
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