SFO

$63 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 1/7. 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

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Everything you should know

Cheapest round-trip
$192
Overall average: $358
Frontier
Mon 12/8Fri 12/12
STL - SFO • 2 stops
Cheapest non-stop
$297
Typical prices: $332-$357
Southwest
Sun 2/15Thu 2/19
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

Mon, Dec 8 - Fri, Dec 12
Frontier Logo
12:07 pm - 12:24 amSTL-SFO
14h 17m2 stops
Frontier Logo
8:48 am - 10:14 amSFO-STL
23h 26m1 stop
$192Frontier
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Wed, Dec 10 - Sat, Dec 13
Frontier Logo
7:43 pm - 7:53 amSTL-SFO
14h 10m1 stop
Frontier Logo
6:00 am - 9:47 amSFO-STL
25h 47m2 stops
$195Frontier
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Tue, Dec 9 - Sat, Dec 13
Multiple Airlines Logo
7:00 am - 2:03 pmSTL-SFO
9h 03m1 stop
Multiple Airlines Logo
11:33 pm - 9:47 amSFO-STL
8h 14m1 stop
$249Multiple Airlines
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Sat, Jan 24 - Wed, Jan 28
Alaska Airlines Logo
9:00 am - 4:32 pmORD-SFO
9h 32m1 stop
Alaska Airlines Logo
11:41 am - 11:37 pmSFO-ORD
9h 56m1 stop
$262Alaska Airlines
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Tue, Dec 2 - Sun, Dec 7
Alaska Airlines Logo
8:59 pm - 11:03 amORD-SFO
16h 04m1 stop
Alaska Airlines Logo
8:09 am - 11:50 pmSFO-ORD
13h 41m1 stop
$263Alaska Airlines
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Mon, Dec 22 - Tue, Jan 6
Multiple Airlines Logo
7:38 pm - 10:24 amORD-SFO
16h 46m1 stop
Multiple Airlines Logo
6:30 pm - 10:49 amSFO-ORD
14h 19m2 stops
$264Multiple Airlines
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Fri, Jan 9 - Mon, Jan 12
Delta Logo
6:35 am - 5:49 pmSTL-SFO
13h 14m2 stops
Delta Logo
10:35 am - 11:25 pmSFO-STL
10h 50m2 stops
$274Delta
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Mon, Dec 8 - Tue, Dec 9
Delta Logo
6:30 am - 3:57 pmSTL-SFO
11h 27m2 stops
Delta Logo
5:45 am - 7:10 pmSFO-STL
11h 25m2 stops
$279Delta
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Sat, Jan 10 - Sat, Jan 10
American Airlines Logo
3:58 pm - 9:37 pmMLI-SFO
7h 39m1 stop
American Airlines Logo
12:17 am - 10:30 amSFO-MLI
8h 13m1 stop
$283American Airlines
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Fri, Jan 30 - Mon, Feb 2
American Airlines Logo
6:00 am - 1:46 pmMLI-SFO
9h 46m1 stop
American Airlines Logo
9:00 am - 9:33 pmSFO-MLI
10h 33m1 stop
$289American Airlines
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Useful Info

Good to know

Low seasonSeptember
Cheapest flight$63
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 5% 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
Rohnert Park
Pacifica
Emeryville
Millbrae
Campbell
Mill Valley
Newark
Novato
Windsor
Belmont
Union City
West Sacramento
Richmond
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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