$55+ Cheap flights from Illinois to San Francisco (SFO)
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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Illinois to San Francisco 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 Illinois to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to San Francisco (SFO). 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 January 17, 2025.
Round-trip from | $197 (Southwest) |
|---|---|
One-way from | $56 (Frontier) |
Find flight deals from Illinois to San Francisco
Cheapest flights from Illinois to San FranciscoExplore the most affordable flight options available from Illinois to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 17, 2025.
Explore the most affordable flight options available from Illinois to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 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 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 Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This eDestinos 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This eDestinos 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 eDestinos 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 Southwest 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 Southwest 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 1/16. 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 United Airlines 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 1/15. 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 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 Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flights from Illinois to San Francisco within your budget
Customize your flight search to find flights from Illinois to San Francisco 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 January 17, 2025.
Fly from
Fly to
Route
Depart
Return
Price
ChicagoSan Francisco
MDW - SFO
MDWSFO
Chicago Midway
Thu 2/6
4:45 pm-7:40 pm
Nonstop4h 55m
San Francisco
Sat 2/8
7:15 am-1:20 pm
Nonstop4h 05m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Thu 2/6
12:45 pm-3:38 pm
Nonstop4h 53m
San Francisco
Sat 2/8
8:25 am-2:54 pm
Nonstop4h 29m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Sat 2/15
7:00 pm-10:10 pm
Nonstop5h 10m
San Francisco
Sat 2/22
6:59 pm-1:04 pm
1 stop16h 05m
ChicagoSan Francisco
MDW - SFO
MDWSFO
Chicago Midway
Sun 3/2
6:40 am-9:42 am
2 stops53h 02m
San Francisco
Sun 3/9
10:59 pm-12:17 am
2 stops47h 18m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Wed 2/5
12:39 pm-3:28 pm
Nonstop4h 49m
San Francisco
Tue 2/11
1:20 pm-7:41 pm
Nonstop4h 21m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Sun 3/30
2:48 pm-11:15 pm
1 stop10h 27m
San Francisco
Tue 4/8
11:12 am-12:15 am
1 stop11h 03m
ChicagoSan Francisco
ORD - SFO
ORDSFO
Chicago O'Hare Intl
Fri 2/14
7:00 pm-10:10 pm
Nonstop5h 10m
San Francisco
Tue 2/18
12:16 am-9:51 am
1 stop7h 35m
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Mon 3/3
10:25 am-12:55 pm
Nonstop4h 30m
San Francisco
Tue 3/11
10:05 am-3:50 pm
Nonstop3h 45m
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Sat 2/22
7:04 pm-10:02 am
2 stops16h 58m
San Francisco
Sun 3/2
8:00 pm-9:16 am
1 stop11h 16m
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Mon 3/3
4:39 pm-11:01 pm
1 stop8h 22m
San Francisco
Tue 3/11
12:05 pm-5:53 pm
Nonstop3h 48m
Best time to book a flight from Illinois to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Illinois with our price prediction graph.
Travel insights for flights from Illinois to San Francisco
Get recent, data-driven insights about flights from Illinois to San Francisco including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Illinois to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Illinois to San Francisco (average of $276). Flying from Illinois to San Francisco in June is currently the most expensive (average of $405). 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 IL to SFO?
Find hourly flight availability from Illinois to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 17, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to San Francisco as you normally would.
Weekly flight availability from Illinois to San Francisco
Explore weekly flight availability from Illinois to San Francisco. 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 January 17, 2025.
The most flights from USIL to SFO are scheduled on a Thursday (51 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).
Rainfall in San Francisco by month
Plan your trip to San Francisco by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.
Temperature in San Francisco by month
Plan your trip to San Francisco by taking into account the average temperature totals by month.
If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).
Reviews of airlines servicing San Francisco
Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated January 17, 2025.
See what other customers who have flown with American Airlines, Frontier and Alaska Airlines from Illinois to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Crew
Comfort
Entertainment
Boarding
Overall
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Food
Crew
Comfort
Entertainment
Boarding
Overall
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Food
Crew
Comfort
Entertainment
Boarding
Overall
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Food
Crew
Comfort
Entertainment
Boarding
Overall
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Food
Crew
Comfort
Entertainment
Boarding
Overall
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Food
Crew
Comfort
Entertainment
Boarding
Overall
Reviews
Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad
Related info for your journey
Find useful and relevant information for your journey from Illinois to San Francisco. 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 Illinois to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Illinois to San Francisco
Discover the top 6 airlines that operate flights from Illinois to San Francisco. 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 January 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$89 | Average$219 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$393 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$141 | Average$451 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$150 | Average$303 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$196 | Average$451 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$264 | Average$432 | FlexibilityNo cancel fee | On-time63% |