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$42+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ORD
Nov 9 — Nov 161
Sat 11/9
Sat 11/16
1 adult, Economy
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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 November 4, 2024.

This Mytrip deal was found by Cheapflights users on 11/3. 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.
Thu 12/122:28 pmSJC - STL
1 stop15h 45mFrontier
Thu 12/1910:09 pmSTL - SJC
1 stop15h 36mFrontier
Deal found 11/3$128
This FareScan deal was found by Cheapflights users on 11/3. 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 FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/52:25 pmSJC - ORD
2 stops13h 05mSpirit Airlines
Wed 12/119:10 pmORD - SJC
1 stop12h 36mSpirit Airlines
Deal found 11/3$167
This Frontier deal was found by Cheapflights users on 11/4. 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.
Thu 12/52:28 pmSJC - MDW
1 stop7h 45mFrontier
Sun 12/87:15 amMDW - SJC
1 stop6h 53mFrontier
Deal found 11/4$168
This Frontier deal was found by Cheapflights users on 11/4. 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 - ORD
1 stop8h 07mFrontier
Sun 12/157:25 amORD - SJC
1 stop6h 43mFrontier
Deal found 11/4$168
This FlightHub deal was found by Cheapflights users on 11/4. 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.
Mon 11/181:33 pmSJC - ORD
1 stop13h 12mMultiple Airlines
Thu 11/216:00 amORD - SJC
1 stop8h 41mMultiple Airlines
Deal found 11/4$171
This Frontier deal was found by Cheapflights users on 11/4. 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.
Sat 11/1610:51 pmSFO - MDW
1 stop10h 14mFrontier
Mon 11/186:13 pmMDW - SFO
1 stop7h 14mFrontier
Deal found 11/4$208
This Frontier deal was found by Cheapflights users on 11/4. 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.
Thu 12/126:05 amSFO - ORD
1 stop5h 55mFrontier
Tue 12/178:26 pmORD - SFO
1 stop13h 21mFrontier
Deal found 11/4$208
This Orbitz deal was found by Cheapflights users on 11/3. 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 11/1910:14 pmSFO - ORD
1 stop12h 56mMultiple Airlines
Wed 1/87:45 amORD - SFO
1 stop8h 02mMultiple Airlines
Deal found 11/3$209
This Alaska Airlines deal was found by Cheapflights users on 11/4. 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 12/1110:40 amSFO - ORD
Nonstop4h 19mAlaska Airlines
Tue 12/175:59 pmORD - SFO
Nonstop4h 59mAlaska Airlines
Deal found 11/4$217
This FareScan deal was found by Cheapflights users on 11/2. 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 FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/285:30 amOAK - ORD
2 stops23h 31mSpirit Airlines
Tue 12/38:27 pmORD - OAK
2 stops21h 41mSpirit Airlines
Deal found 11/2$223
This United Airlines deal was found by Cheapflights users on 11/3. 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 12/312:00 pmSFO - STL
Nonstop3h 56mUnited Airlines
Tue 12/107:00 amSTL - SFO
Nonstop4h 36mUnited Airlines
Deal found 11/3$227
This Frontier deal was found by Cheapflights users on 11/4. 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.
Mon 11/1810:59 amSFO - STL
1 stop6h 39mFrontier
Fri 11/225:38 pmSTL - SFO
1 stop8h 56mFrontier
Deal found 11/4$228

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 2,455,398 searches. Data last updated November 4, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OaklandChicago

OAK - ORD

OAKORD

Oakland

Wed 12/4

3:00 pm-5:30 am

1 stop12h 30m

$42

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Thu 12/12

2:28 pm-8:13 am

1 stop15h 45m

$65

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 12/24

8:35 pm-5:30 am

1 stop6h 55m

$104

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 12/24

11:35 pm-5:54 am

Nonstop4h 19m

$105

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Wed 12/11

8:15 am-2:25 pm

Nonstop4h 10m

$109

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Sat 2/1

3:49 pm-11:57 pm

1 stop6h 08m

$124

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Wed 12/25

5:40 am-4:10 pm

1 stop8h 30m

$128

San JoseChicago

SJC - MDW

SJCMDW

San Jose

Mon 11/18

10:29 am-3:50 pm

1 stop27h 21m

$75

San JoseChicago

SJC - ORD

SJCORD

San Jose

Thu 12/5

8:44 pm-5:30 am

1 stop6h 46m

$76

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 11/29

11:59 pm-8:21 am

1 stop6h 22m

$160

Flights are sorted by cheapest first

Deals found on 11/3

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 4, 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 4, 2024.

The most flights from zzXIH to USIL are scheduled on a Sunday (72 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (15 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 4, 2024.
Read reviews from past customers who have flown Alaska Airlines, United Airlines 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.
Southwest
8.1
Very good
5,089 reviews

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.3

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
5,089 reviews
Southwest
8.1
Very good
5,089 reviews

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.3

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
9,423 reviews
Southwest
8.1
Very good
5,089 reviews

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.3

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
8,829 reviews
Southwest
8.1
Very good
5,089 reviews

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.3

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
9,226 reviews
Southwest
8.1
Very good
5,089 reviews

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.3

Reviews

1 / 10

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

WestJet
7.3
Good
2,803 reviews
Southwest
8.1
Very good
5,089 reviews

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Crew

8.7

Boarding

8.3

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.

  • Can I find flights from San Francisco Bay Area to Illinois for under $200 on Cheapflights?

    Yes, there are multiple flights from San Francisco Bay Area to Illinois for under $200. The cheapest flight booked recently is on Spirit Airlines for just $106, but on average you can expect to pay $197.

  • Are there nonstop flights from San Francisco Bay Area to Illinois for under $300 on Cheapflights?

    Cheapflights has at least 9 direct flights from San Francisco Bay Area to Illinois under $300. A good price for a nonstop flight from San Francisco Bay Area to Illinois is less than $358.

  • Are there last-minute flights available from San Francisco Bay Area to Illinois for under $200?

    There are currently 20+ open flights from San Francisco Bay Area to Illinois within the next 7 days for less than $200.

  • What days are nonstop flights available from San Francisco Bay Area to Illinois?

    Nonstop flights are available for this route on the following days: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.

  • How many flights depart from San Francisco Bay Area to Illinois on average per day?

    73 flight departures from San Francisco Bay Area to Illinois per day on average.
    Early Morning (Midnight to 6am) - 11% of flight departures
    Morning (6am - Noon) - 40% of flight departures
    Afternoon (Noon - 6pm) - 36% of flight departures
    Evening (6pm - Midnight) - 14% of flight departures

  • How long is the flight from San Francisco Bay Area to Illinois?

    For as low as $106, Spirit Airlines can have you in Illinois from San Francisco Bay Area in 4h 19m. The distance from San Francisco Bay Area to Illinois is about 1851 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $42. Users have also found prices from $63 and $104 on Frontier and Alaska Airlines, respectively.

  • What does SFO to ORD mean?

    SFO stands for San Francisco Airport, while ORD stands for Chicago O'Hare Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Champaign University-Willard Airport (CMI).

  • Can I find deals for flights from San Francisco Bay Area to Illinois that include extra baggage allowance?

    The amount of baggage you can bring on your San Francisco Bay Area to Illinois flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from San Francisco Bay Area to Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter San Francisco Bay Area to Illinois flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from San Francisco Bay Area to Illinois that allow pets onboard?

    Many airlines flying from San Francisco Bay Area to Illinois offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from San Francisco Bay Area to Illinois?

    Yes, you can often find last-minute deals on San Francisco Bay Area to Illinois flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the San Francisco Bay Area to Illinois flight deals updated?

    The San Francisco Bay Area to Illinois flight deals you see on this page were last updated on 11/4.

  • 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.

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 2,455,398 searches. Data last updated November 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$71Average$224FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$100Average$361FlexibilityNo cancel feeOn-time75%
Spirit AirlinesCheapest$112Average$271FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$185Average$494FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$501FlexibilityNo cancel feeOn-time71%
DeltaCheapest$204Average$413FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$210Average$406FlexibilityNo cancel feeOn-time63%
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