SFO

$68 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 11/11. 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

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Everything you should know

Cheapest round-trip
$175
Overall average: $341
Frontier
Wed 11/5Sun 11/9
STL - SFO • 1 stop
Cheapest non-stop
$255
Southwest
Wed 12/10Thu 1/1
MDW - SFO • Non-stop
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We hope you love your trip to San Francisco!
Flight Deals
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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, Nov 5 - Sun, Nov 9
Frontier Logo
7:45 pm - 9:33 amSTL-SFO
15h 48m1 stop
Frontier Logo
8:55 pm - 11:24 amSFO-STL
12h 29m1 stop
$175Frontier
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Fri, Nov 7 - Mon, Nov 10
Frontier Logo
7:45 pm - 6:45 pmSTL-SFO
25h 00m1 stop
Frontier Logo
3:25 pm - 9:07 amSFO-STL
15h 42m1 stop
$176Frontier
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Fri, Nov 7 - Thu, Nov 13
Frontier Logo
12:09 pm - 4:43 pmSTL-SFO
6h 34m1 stop
Frontier Logo
8:55 pm - 11:24 amSFO-STL
12h 29m1 stop
$177Frontier
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Thu, Nov 20 - Mon, Dec 1
Multiple Airlines Logo
7:00 am - 8:47 pmORD-SFO
15h 47m2 stops
Multiple Airlines Logo
6:32 pm - 5:32 amSFO-ORD
9h 00m1 stop
$237Multiple Airlines
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Tue, Nov 18 - Tue, Dec 2
Alaska Airlines Logo
9:20 am - 10:01 pmORD-SFO
14h 41m1 stop
Alaska Airlines Logo
7:00 am - 11:50 pmSFO-ORD
14h 50m1 stop
$238Alaska Airlines
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Tue, Dec 16 - Sun, Jan 11
Alaska Airlines Logo
8:59 pm - 8:06 amORD-SFO
13h 07m1 stop
Alaska Airlines Logo
7:40 pm - 11:55 pmSFO-ORD
26h 15m1 stop
$241Alaska Airlines
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Mon, Oct 27 - Wed, Oct 29
Multiple Airlines Logo
12:23 pm - 9:52 pmORD-SFO
11h 29m1 stop
Multiple Airlines Logo
8:00 am - 12:59 amSFO-ORD
14h 59m2 stops
$244Multiple Airlines
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Wed, Dec 24 - Wed, Dec 24
Delta Logo
7:25 am - 12:21 pmORD-SFO
6h 56m1 stop
Delta Logo
12:10 am - 9:25 amSFO-ORD
7h 15m1 stop
$253Delta
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Wed, Dec 10 - Sat, Dec 13
Delta Logo
6:00 am - 3:57 pmSTL-SFO
11h 57m2 stops
Delta Logo
1:58 pm - 12:50 amSFO-STL
8h 52m2 stops
$254Delta
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Mon, Dec 22 - Sun, Dec 28
Sun Country Air Logo
10:51 am - 10:54 pmORD-SFO
14h 03m1 stop
Sun Country Air Logo
11:59 pm - 6:38 pmSFO-ORD
16h 39m1 stop
$275Sun Country Air
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Useful Info

Good to know

Low seasonJanuary
Cheapest flight$68
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 12% increase in price.
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
Marina
Capitola
Pacifica
Emeryville
Rohnert Park
Millbrae
Campbell
Mill Valley
Newark
Novato
Windsor
Belmont
Richmond
West Sacramento
Union City
Los Altos
Corte Madera
Jenner
American Canyon

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)

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