SFO

$60 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 2/4. 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
$151
Overall average: $367
Frontier
Wed 2/4Sun 2/8
STL - SFO • 1 stop
Cheapest non-stop
$245
Typical prices: $412-$477
Southwest
Sat 3/21Wed 3/25
MDW - 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

Wed, Feb 4 - Sun, Feb 8
Frontier Logo
3:46 pm - 11:41 pm
STL
-
SFO
9h 55m1 stop
Frontier Logo
6:15 am - 12:50 pm
SFO
-
STL
28h 35m1 stop
$151Frontier
Sat, Jan 31 - Sat, Feb 7
Frontier Logo
3:46 pm - 11:41 pm
STL
-
SFO
9h 55m1 stop
Frontier Logo
7:00 am - 11:18 am
SFO
-
STL
26h 18m1 stop
$164Frontier
Mon, Feb 9 - Wed, Feb 11
Frontier Logo
9:45 pm - 6:20 pm
STL
-
SFO
22h 35m1 stop
Frontier Logo
7:15 pm - 9:26 pm
SFO
-
STL
24h 11m1 stop
$165Frontier
Sun, Jan 18 - Tue, Jan 27
Southwest Logo
5:05 am - 11:50 am
MDW
-
SFO
8h 45m1 stop
Southwest Logo
9:30 pm - 9:05 am
SFO
-
MDW
9h 35m1 stop
$243Southwest
Sat, May 9 - Tue, May 12
Delta Logo
7:10 am - 2:29 pm
ORD
-
SFO
9h 19m1 stop
Delta Logo
1:35 pm - 9:58 pm
SFO
-
ORD
6h 23m1 stop
$243Delta
Sat, Jan 24 - Sat, Jan 31
Southwest Logo
6:00 am - 11:35 am
MDW
-
SFO
7h 35m1 stop
Southwest Logo
5:10 am - 6:30 pm
SFO
-
MDW
11h 20m2 stops
$244Southwest
Thu, Jan 22 - Sun, Jan 25
Multiple Airlines Logo
7:41 pm - 12:28 am
ORD
-
SFO
6h 47m1 stop
Multiple Airlines Logo
6:00 am - 5:10 pm
SFO
-
ORD
9h 10m1 stop
$246Multiple Airlines
Thu, Jan 22 - Tue, Jan 27
Multiple Airlines Logo
7:41 pm - 12:28 am
ORD
-
SFO
6h 47m1 stop
Multiple Airlines Logo
7:00 am - 10:38 pm
SFO
-
ORD
13h 38m2 stops
$247Multiple Airlines
Tue, Jan 27 - Fri, Feb 6
Alaska Airlines Logo
3:44 pm - 10:47 pm
ORD
-
SFO
9h 03m1 stop
Alaska Airlines Logo
7:00 am - 5:10 pm
SFO
-
ORD
8h 10m1 stop
$249Alaska Airlines
Tue, Jan 27 - Sun, Feb 1
Delta Logo
1:29 pm - 6:38 pm
MDW
-
SFO
7h 09m1 stop
Delta Logo
10:54 pm - 8:52 am
SFO
-
MDW
7h 58m1 stop
$250Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$62
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 4% 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
Capitola
Emeryville
Pacifica
Millbrae
Campbell
Mill Valley
Newark
Novato
Windsor
Union City
Belmont
Richmond
West Sacramento
Los Altos
Corte Madera
American Canyon
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)