$100+ Cheap flights from San Francisco (SFO) 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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from San Francisco 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 to Illinois
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) 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 janvier 17, 2025.
Round-trip from | $197 (Southwest) |
|---|---|
One-way from | $101 (Kiwi.com) |
Find flight deals from San Francisco to Illinois
Cheapest flights from San Francisco to IllinoisExplore the most affordable flight options available from San Francisco to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 17, 2025.
Explore the most affordable flight options available from San Francisco to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 17, 2025.
This Southwest deal was found by Cheapflights users on 1/15. 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.
This Alaska Airlines deal was found by Cheapflights users on 1/15. 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 1/15. 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 Gotogate deal was found by Cheapflights users on 1/15. 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.
This Travelocity deal was found by Cheapflights users on 1/15. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 1/16. 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 American Airlines deal was found by Cheapflights users on 1/16. 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 1/15. 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 FlightHub deal was found by Cheapflights users on 1/16. 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 American Airlines deal was found by Cheapflights users on 1/16. 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 United Airlines deal was found by Cheapflights users on 1/15. 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 KAYAK deal was found by Cheapflights users on 1/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flights from San Francisco to Illinois within your budget
Customize your flight search to find flights from San Francisco 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 janvier 17, 2025.
Fly from
Fly to
Route
Depart
Return
Price
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
mar. 2/25
10:46 am-4:58 pm
Nonstop4h 12m
Chicago O'Hare Intl
mar. 3/25
6:56 pm-9:55 pm
Nonstop4h 59m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
mer. 2/12
6:15 am-12:42 pm
Nonstop4h 27m
Chicago O'Hare Intl
mer. 2/19
3:40 pm-8:40 pm
1 stop7h 00m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
mar. 2/11
12:35 am-9:51 am
1 stop7h 16m
Chicago O'Hare Intl
ven. 2/14
7:00 pm-10:10 pm
Nonstop5h 10m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
lun. 3/31
6:00 am-12:44 am
1 stop16h 44m
Chicago O'Hare Intl
sam. 4/5
4:20 pm-11:22 pm
1 stop9h 02m
San FranciscoChicago
SFO - MDW
SFOMDW
San Francisco
sam. 2/8
7:15 am-1:20 pm
Nonstop4h 05m
Chicago Midway
mer. 2/12
8:05 am-2:50 pm
1 stop8h 45m
San FranciscoChicago
SFO - MDW
SFOMDW
San Francisco
mer. 2/12
2:53 pm-12:17 am
1 stop7h 24m
Chicago Midway
mar. 2/18
7:05 am-1:33 pm
1 stop8h 28m
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
jeu. 2/6
1:20 pm-7:41 pm
Nonstop4h 21m
Chicago O'Hare Intl
mer. 2/12
8:30 am-11:24 am
Nonstop4h 54m
San FranciscoPeoria
SFO - PIA
SFOPIA
San Francisco
mer. 2/12
5:20 am-4:01 pm
1 stop8h 41m
Greater Peoria
mar. 2/18
3:37 pm-11:59 pm
2 stops10h 22m
San FranciscoSt. Louis
SFO - STL
SFOSTL
San Francisco
jeu. 3/27
6:00 am-9:16 am
1 stop25h 16m
Lambert-St Louis
dim. 3/30
6:38 pm-7:16 am
1 stop14h 38m
San FranciscoSt. Louis
SFO - STL
SFOSTL
San Francisco
sam. 2/15
4:09 pm-11:39 pm
1 stop5h 30m
Lambert-St Louis
sam. 2/22
6:10 am-11:05 am
1 stop6h 55m
Best time to book a flight from San Francisco to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from San Francisco with our price prediction graph.
Travel insights for flights from San Francisco to Illinois
Get recent, data-driven insights about flights from San Francisco to Illinois including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from San Francisco to Illinois?
Currently, August is the cheapest month in which you can book a flight from San Francisco to Illinois (average of $245). Flying from San Francisco 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 SFO to IL?
Find hourly flight availability from San Francisco 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 janvier 17, 2025.
When flying from San Francisco 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 to Illinois
Explore weekly flight availability from San Francisco 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 janvier 17, 2025.
The most flights from SFO to USIL are scheduled on a Thursday (56 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 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 janvier 17, 2025.
Get a feel of what it's like to fly with Frontier, Alaska Airlines and United Airlines from San Francisco to Illinois by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
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Boarding
Food
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Entertainment
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Crew
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Boarding
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Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Entertainment
Overall
Crew
Comfort
Boarding
Food
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Entertainment
Overall
Crew
Comfort
Boarding
Food
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Entertainment
Overall
Crew
Comfort
Boarding
Food
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Entertainment
Overall
Crew
Comfort
Boarding
Food
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 to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for San Francisco to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from San Francisco to Illinois
Discover the top 7 airlines that operate flights from San Francisco 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 janvier 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$223 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$112 | Average$241 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$168 | Average$317 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$185 | Average$461 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$205 | Average$462 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$219 | Average$432 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$235 | Average$340 | FlexibilityNo cancel fee | On-timeN/A |