SFO

$47 Find Cheap Flights from Illinois to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to San Francisco departing on 3/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

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Everything you should know

Cheapest round-trip
$186
Overall average: $450
Frontier
Mon 3/9Fri 3/13
STL - SFO • 1 stop
Cheapest non-stop
$245
Typical prices: $312-$496
United Airlines
Sat 3/14Sat 3/21
ORD - SFO • Non-stop
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We hope you love your trip to San Francisco!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Illinois to San Francisco

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to San Francisco

Mon, Mar 9 - Fri, Mar 13
Frontier Logo
8:12 pm - 8:09 pm
STL
-
SFO
25h 57m
1 stop
Frontier Logo
9:04 pm - 9:49 am
SFO
-
STL
10h 45m
1 stop
$186Frontier
Mon, Mar 2 - Sun, Mar 8
Frontier Logo
1:54 pm - 12:28 am
STL
-
SFO
12h 34m
1 stop
Frontier Logo
9:04 pm - 9:49 am
SFO
-
STL
10h 45m
1 stop
$187Frontier
Sat, Feb 21 - Sat, Feb 28
Southwest Logo
7:45 am - 1:00 pm
MDW
-
SFO
7h 15m
1 stop
Southwest Logo
6:40 am - 2:30 pm
SFO
-
MDW
5h 50m
1 stop
$245Southwest
Sat, Feb 21 - Wed, Feb 25
Southwest Logo
8:15 am - 11:15 am
MDW
-
SFO
5h 00mnonstop
Southwest Logo
6:05 am - 4:45 pm
SFO
-
MDW
8h 40m
1 stop
$247Southwest
Sat, Mar 7 - Mon, Mar 9
American Airlines Logo
6:45 am - 9:40 am
ORD
-
SFO
4h 55mnonstop
American Airlines Logo
5:34 pm - 11:49 pm
SFO
-
ORD
4h 15mnonstop
$247American Airlines
Wed, Apr 15 - Sun, Apr 19
Multiple Airlines Logo
7:41 am - 4:52 pm
ORD
-
SFO
11h 11m
2 stops
Multiple Airlines Logo
9:33 pm - 6:47 am
SFO
-
ORD
7h 14m
1 stop
$248Multiple Airlines
Wed, Apr 15 - Mon, Apr 20
American Airlines Logo
11:17 am - 2:12 pm
ORD
-
SFO
4h 55mnonstop
American Airlines Logo
6:00 am - 12:32 pm
SFO
-
ORD
4h 32mnonstop
$249American Airlines
Fri, Mar 13 - Wed, Mar 18
United Airlines Logo
6:17 am - 9:22 am
ORD
-
SFO
5h 05mnonstop
United Airlines Logo
3:15 pm - 9:37 pm
SFO
-
ORD
4h 22mnonstop
$250United Airlines
Thu, Mar 26 - Wed, Apr 15
Multiple Airlines Logo
3:21 pm - 7:58 am
ORD
-
SFO
18h 37m
2 stops
Multiple Airlines Logo
5:49 pm - 5:50 am
SFO
-
ORD
10h 01m
1 stop
$251Multiple Airlines
Mon, Mar 2 - Mon, Mar 9
United Airlines Logo
2:51 pm - 8:00 pm
PIA
-
SFO
7h 09m
1 stop
United Airlines Logo
11:59 pm - 10:03 am
SFO
-
PIA
8h 04m
1 stop
$309United Airlines
Useful Info

Good to know

Low seasonSeptember
Cheapest flight$74
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from St. Louis to San Francisco

FAQs for booking flights from Illinois to San Francisco

  • How does KAYAK find such low prices on flights from Illinois to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Calistoga
Rohnert Park
Marina
Emeryville
Capitola
Pacifica
Millbrae
Campbell
Mill Valley
Newark
Novato
Windsor
Union City
Richmond
Belmont
West Sacramento
Los Altos
American Canyon
Corte Madera
Jenner

Everything you need to know for your flight to San Francisco

Information on the airport you'll fly into in San Francisco

San Francisco (SFO)