$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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from San Francisco Bay Area to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 Jänner 21, 2025.
Round-trip from | $132 (Cheapflightsfares) |
|---|---|
One-way from | $65 (Frontier) |
Find flight deals from San Francisco Bay Area to Illinois
Cheapest flights from San Francisco Bay Area to IllinoisExplore 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 Jänner 21, 2025.
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 Jänner 21, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 1/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 1/20. 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.
This CheapOair deal was found by Cheapflights users on 1/21. 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.
This Frontier deal was found by Cheapflights users on 1/19. 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.
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 1/21. 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.
This Kissandfly.com deal was found by Cheapflights users on 1/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kissandfly.com deal was found by Cheapflights users on 1/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Orbitz deal was found by Cheapflights users on 1/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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 Jänner 21, 2025.
Fly from
Fly to
Route
Depart
Return
Price
OaklandChicago
OAK - ORD
OAKORD
Oakland
Mi 2/19
5:10 am-9:50 pm
1 stop14h 40m
Chicago O'Hare Intl
Sa 2/22
4:30 pm-12:17 am
1 stop9h 47m
San JoseChicago
SJC - MDW
SJCMDW
San Jose
Fr 2/21
4:03 pm-12:17 am
1 stop6h 14m
Chicago Midway
So 2/23
8:44 pm-4:46 pm
1 stop22h 02m
San JoseChicago
SJC - ORD
SJCORD
San Jose
Mo 2/3
3:35 pm-5:31 am
1 stop11h 56m
Chicago O'Hare Intl
Mo 2/10
9:18 pm-7:07 pm
2 stops23h 49m
San JoseChicago
SJC - ORD
SJCORD
San Jose
Mi 4/16
4:03 pm-12:42 am
1 stop6h 39m
Chicago O'Hare Intl
Di 4/22
6:45 am-11:12 am
1 stop6h 27m
San JoseChicago
SJC - ORD
SJCORD
San Jose
So 2/2
1:11 pm-12:32 am
1 stop9h 21m
Chicago O'Hare Intl
Mo 2/10
7:50 am-12:11 pm
1 stop6h 21m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Sa 3/1
6:05 am-12:28 pm
Nonstop4h 23m
Chicago O'Hare Intl
Mi 3/5
8:45 am-11:40 am
Nonstop4h 55m
San FranciscoChicago
SFO - MDW
SFOMDW
San Francisco
Mo 2/10
6:05 am-12:17 am
1 stop16h 12m
Chicago Midway
Di 2/18
7:05 am-10:09 pm
2 stops17h 04m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Mo 2/10
9:10 pm-10:37 pm
1 stop23h 27m
Chicago O'Hare Intl
Di 2/18
6:50 am-10:09 pm
2 stops17h 19m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Sa 3/1
10:48 am-5:00 pm
Nonstop4h 12m
Chicago O'Hare Intl
Mo 3/3
7:00 pm-10:10 pm
Nonstop5h 10m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
So 4/20
8:32 pm-5:05 am
1 stop6h 33m
Chicago O'Hare Intl
Mi 4/23
6:58 pm-9:57 pm
Nonstop4h 59m
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.
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 $320). 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 Jänner 21, 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 Jänner 21, 2025.
The most flights from zzXIH to USIL are scheduled on a Monday (58 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (35 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 Jänner 21, 2025.
Read reviews from past customers who have flown Spirit Airlines, United 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.
Food
Crew
Entertainment
Boarding
Comfort
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Food
Crew
Entertainment
Boarding
Comfort
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Food
Crew
Entertainment
Boarding
Comfort
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Food
Crew
Entertainment
Boarding
Comfort
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Food
Crew
Entertainment
Boarding
Comfort
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Food
Crew
Entertainment
Boarding
Comfort
Overall
Reviews
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.
Browse thousands of different options on Cheapflights for your next trip
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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.
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 Jänner 21, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$230 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$100 | Average$383 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$112 | Average$263 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$185 | Average$474 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$206 | Average$499 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$208 | Average$465 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$235 | Average$415 | FlexibilityNo cancel fee | On-timeN/A |