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 2021: compare Illinois to San Francisco flight prices with the expected peak season, weather and rainfall in San Francisco.
How far in advance should I book a flight from Illinois to San Francisco?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 35 days in advance, which can save you up to 7% on flights from Illinois to San Francisco compared to booking the week you need them. Waiting 35 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $99. For sooner than that we have options available in the next 3 days from $105.

What is the cheapest month to fly from Illinois to San Francisco?

August can be a great time to fly to San Francisco from Illinois with a flight ticket averaging about $108. Cheapflights users have found deals in the month of August for as cheap as $48. The most expensive prices can be found in the month of June.

Cheap flights from Illinois to San Francisco in May, June 2021

The best prices found for Illinois to SFO flights for May, June
12 May - 17 May
$167pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
8 Jun - 15 Jun
$168pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis
19 May - 24 May
$170pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

Illinois to San Francisco 2021 flight deals

Cheap flights to San Francisco from Illinois found for this year
12 May - 17 May
$167pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
8 Jun - 15 Jun
$168pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis
19 May - 24 May
$170pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

Non-stop flights to San Francisco from Illinois

Save time with Illinois to San Francisco direct flight deals
2 Oct - 9 Oct
$193pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
29 Sep - 2 Oct
$195pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ORD
Chicago O'Hare Intl
16 Oct - 20 Oct
$197pp
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
Alaska 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
19 May - 24 May
$170pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
19 May - 21 May
$183pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis
20 May - 2 Jun
$188pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to San Francisco from Illinois

The cheapest one-way flights from Illinois to San Francisco
2:25 pm - 5:18 pm
Alaska Airlines
Nonstop
4h 53m
ORD - SFO
Alaska Airlines
3:19 am - 10:29 am
American Airlines
1 Stop
9h 10m
ORD - SFO
American Airlines
4:30 am - 7:58 pm
Frontier
1 Stop
17h 28m
ORD - SFO
Frontier
$117
Kiwi.com

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

Are flight prices decreasing from Illinois to San Francisco due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Illinois and San Francisco for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Illinois to San Francisco to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Alaska Airlines is one of them. Some of the new policies that have been implemented to accommodate travelers flying from Illinois to San Francisco are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

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.

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.

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 Multiple Airlines for just $168, but on average you can expect to pay $193.

Are there nonstop flights from Illinois to San Francisco for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Illinois to San Francisco under $200. A good price for a nonstop flight from Illinois to San Francisco is less than $212.

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

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

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

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

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.

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 cheapest Flights from Illinois to San Francisco?

On average you can expect to pay $601 for a flight from Illinois to San Francisco. The cheapest flight overall is $119 while the most popular route, (Chicago O'Hare Intl - San Francisco) is currently priced at $193.

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

The top 3 most reliable airlines when flying from Illinois to San Francisco are Fiji Airways (100%), Alaska Airlines (100%) and Singapore Airlines (100%).

How long is the flight from Illinois to San Francisco?

For as low as $219, United Airlines can have you in San Francisco from Illinois in 4h 33m. Most flights are nonstop.

What are the cheapest airlines flying from Illinois to San Francisco round-trip?

According to our current data, Frontier ($170), Alaska Airlines ($197), and American Airlines ($205) offers the cheapest pricing from Illinois to San Francisco.

What are the cheapest airlines to fly from Illinois to San Francisco one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $81. Alaska Airlines flights start at $99 while deals on American Airlines start at $106 one-way.

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
4h 32m
Average temperature for May in San Francisco
69.8 °F
Avg rainfall for May in San Francisco
0.6 ″

Airports servicing

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

Airports servicing San Francisco

Top 7 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
Spirit Airlines
$103 $236 No cancel fee 65%
Frontier
$102 $251 No cancel fee 62%
Alaska Airlines
$118 $257 No cancel fee 75%
Sun Country Air
$131 $293 No cancel fee 83%
Delta
$127 $372 No cancel fee N/A
United Airlines
$138 $393 No cancel fee 69%
American Airlines
$128 $409 No cancel fee 71%
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