Cheap flights from Illinois (IL) to San Francisco (SFO)

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How to find the cheapest flight from
Illinois to San Francisco (SFO)

All the information you need to plan the best null to SFO flight in 2022: compare Illinois to San Francisco flight prices with the expected peak season, weather and rainfall in San Francisco.
What is the cheapest month to fly from Illinois to San Francisco?

October is one of the best times of the year to fly to San Francisco from Illinois. Prices for October average $337 per person but you can even find prices for as low as $161. The most expensive prices can be found in the month of June. Opting for a October flight can save you 40% on your journey compared to booking in June

How far in advance should I book a flight from Illinois to San Francisco?

To save on the cost of your flight from Illinois to San Francisco, book at least 61 days before your planned departure. Booking around this time can save you about 80% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $448 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $631.

When is the cheapest time to fly from Illinois to San Francisco (IL - SFO)?

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.

Cheap flights from Illinois to San Francisco in June, July 2022

The best prices found for Illinois to SFO flights for June, July
19 Jul - 26 Jul
$211pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis
26 Jul - 1 Aug
$234pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis
16 Jul - 25 Jul
$248pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis

Illinois to San Francisco 2022 flight deals

Cheap flights to San Francisco from Illinois found for this year
7 Sep - 14 Sep
$159pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis
7 Sep - 14 Sep
$161pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis
27 Aug - 29 Aug
$164pp
MDW
Chicago Midway
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
MDW
Chicago Midway

Non-stop flights to San Francisco from Illinois

Save time with Illinois to San Francisco direct flight deals
8 Sep - 19 Sep
$318pp
ORD
Chicago O'Hare Intl
American Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
American Airlines
Non-Stop
ORD
Chicago O'Hare Intl
3 Nov - 9 Nov
$328pp
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
26 Aug - 29 Aug
$329pp
ORD
Chicago O'Hare Intl
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Last minute flights from Illinois to San Francisco

Late deals on round-trip flights to San Francisco from Illinois, departing today and this week
8 Jul - 13 Jul
$281pp
MDW
Chicago Midway
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
MDW
Chicago Midway
8 Jul - 13 Jul
$282pp
MDW
Chicago Midway
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
MDW
Chicago Midway
7 Jul - 11 Jul
$284pp
MDW
Chicago Midway
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
MDW
Chicago Midway

One-way flights to San Francisco from Illinois

The cheapest one-way flights from Illinois to San Francisco
4:13 pm - 3:50 am
Frontier
1 Stop
13h 37m
STL - SFO
Frontier
$80
Kiwi.com
1:06 pm - 7:43 pm
Frontier
1 Stop
8h 37m
MDW - SFO
Frontier
$84
CheapOair
7:33 am - 7:43 pm
Frontier
1 Stop
14h 10m
STL - SFO
Frontier
$86
Flights by SU

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Illinois</span> to <span class="emphasized">San Francisco</span> flights.

Flight FAQs

From Illinois to San Francisco

What airport do you fly into for flights to San Francisco from Illinois?

If you book a flight to San Francisco from Illinois, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco.

Which airlines flying from Illinois to San Francisco have flexible cancellations due to COVID-19?

United Airlines, American Airlines, and Alaska Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

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

Yes, there are multiple flights from Illinois to San Francisco for under $200. The cheapest flight booked recently is on Frontier for just $159, but on average you can expect to pay $190.

Are there nonstop flights from Illinois to San Francisco for under $400 on Cheapflights?

Cheapflights has at least 20 direct flights from Illinois to San Francisco under $400. A good price for a nonstop flight from Illinois to San Francisco is less than $348.

Are there last-minute flights available from Illinois to San Francisco for under $300?

There are currently 20+ open flights from Illinois to San Francisco within the next 7 days for less than $300.

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

You can find nonstop flights on the following days: Sunday, Thursday, Saturday.

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

Travelers can expect 27 flights from Illinois to San Francisco on average per day.
Morning (6am - Noon) - 19% of flight departures
Afternoon (Noon - 6pm) - 81% of flight departures

How long is the flight from Illinois to San Francisco?

Frontier can get you from Illinois to San Francisco in just under 16h 34m. Your travel time can differ by up to . Airlines will cover a distance of 1851 mi.

What are the cheapest flights from Illinois to San Francisco?

While on average a flight from Illinois to San Francisco is generally $756, our data shows the cheapest flight currently is $20. When looking at the most popular route, (Chicago O'Hare Intl - San Francisco), you can expect to pay $254 for that flight.

What are the most popular routes from Illinois to San Francisco?

The most popular route from Illinois to San Francisco is Chicago O'Hare Intl - San Francisco. You may also consider Chicago Midway - San Francisco or Lambert-St Louis - San Francisco.

What are the most reliable airlines from Illinois to San Francisco?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to San Francisco on time: ANA (92%), Brussels Airlines (82%), Virgin Australia (82%).

What are the most popular airlines that fly from Illinois to San Francisco?

Before booking your flight from Illinois to San Francisco check out the most popular airlines for this route: Major Airline, American Airlines or Alaska Airlines.

COVID Restrictions

View COVID Travel Restrictions for San Francisco, CA

Do I need a COVID test to fly to San Francisco from Illinois?

Information is based on travel restrictions for travel to San Francisco within the United States

Most visitors from Illinois need to provide a negative COVID-19 test result and/or quarantine to enter San Francisco.

COVID-19 testing requirements
Visitors from Illinois are not required to present a negative COVID-19 PCR test or antigen result upon entering San Francisco.

Quarantine requirements
Visitors from Illinois are not required to quarantine after entering San Francisco.

Do I need a test to fly back to Illinois from San Francisco?

Returning to Illinois from San Francisco

COVID-19 testing requirements
Visitors from San Francisco are not required to present a negative COVID-19 PCR test or antigen result upon entering Illinois.

Quarantine requirements
Visitors from San Francisco are not required to quarantine after entering Illinois.

Hide COVID Travel Restrictions for San Francisco, CA

Departure points for flights from Illinois to San Francisco

Select to see more specific information for flights to San Francisco from all departure points in Illinois.

Destination information for San Francisco

Things to know before you go - useful duration and weather info for your trip from Illinois to San Francisco.
Flight duration from Illinois to SFO
3h 30m
Average temperature for June in San Francisco
73.4 °F
Avg rainfall for June in San Francisco
0.0 ″

Airports servicing

Bloomington (BMI)
Champaign (CMI)
Decatur (DEC)
Moline (MLI)
Marion (MWA)

Airports servicing San Francisco

Top 8 airlines flying from Illinois to San Francisco

The chart below displays the airlines Cheapflights users traveling from Illinois to San Francisco choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Juneyao Airlines
$11 $21 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Frontier
$83 $289 No cancel fee 62%
Spirit Airlines
$91 $280 No cancel fee 65%
Alaska Airlines
$98 $264 No cancel fee 75%
American Airlines
$98 $456 No cancel fee 71%
Delta
$133 $388 No cancel fee N/A
United Airlines
$177 $446 No cancel fee 69%
Sun Country Air
$240 $418 No cancel fee 83%
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