SFO

$82 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 10/27. 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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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

Thu, Oct 23 - Wed, Nov 5
Frontier Logo
10:17 am - 4:00 pmSTL-SFO
7h 43m1 stop
Frontier Logo
6:34 am - 9:07 amSFO-STL
24h 33m1 stop
$175Frontier
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Wed, Oct 22 - Sun, Nov 2
Frontier Logo
7:52 pm - 2:24 pmSTL-SFO
20h 32m1 stop
Frontier Logo
8:09 pm - 9:07 amSFO-STL
10h 58m1 stop
$182Frontier
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Tue, Oct 7 - Wed, Oct 8
Southwest Logo
5:55 am - 9:40 amSTL-SFO
5h 45m1 stop
Southwest Logo
5:30 am - 1:20 pmSFO-STL
5h 50m1 stop
$183Southwest
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Tue, Oct 7 - Wed, Oct 8
Southwest Logo
6:15 am - 12:20 pmSTL-SFO
8h 05m2 stops
Southwest Logo
5:30 am - 1:20 pmSFO-STL
5h 50m1 stop
$188Southwest
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Wed, Feb 25 - Thu, Feb 26
Alaska Airlines Logo
2:55 pm - 10:18 pmSTL-SFO
9h 23m1 stop
Alaska Airlines Logo
2:40 pm - 11:56 pmSFO-STL
7h 16m1 stop
$198Alaska Airlines
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Tue, Oct 21 - Sun, Oct 26
Multiple Airlines Logo
8:20 am - 2:01 pmORD-SFO
7h 41m1 stop
Multiple Airlines Logo
10:25 pm - 12:58 pmSFO-ORD
12h 33m1 stop
$208Multiple Airlines
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Fri, Oct 24 - Tue, Oct 28
Multiple Airlines Logo
9:54 pm - 9:29 amORD-SFO
13h 35m1 stop
Multiple Airlines Logo
8:00 am - 7:34 pmSFO-ORD
9h 34m1 stop
$209Multiple Airlines
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Tue, Feb 24 - Wed, Feb 25
Alaska Airlines Logo
2:55 pm - 10:18 pmSTL-SFO
9h 23m1 stop
Alaska Airlines Logo
2:40 pm - 11:56 pmSFO-STL
7h 16m1 stop
$214Alaska Airlines
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Wed, Feb 25 - Mon, Mar 2
United Airlines Logo
6:00 pm - 11:17 pmSTL-SFO
7h 17m1 stop
United Airlines Logo
11:59 pm - 9:23 amSFO-STL
7h 24m1 stop
$215United Airlines
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Thu, Oct 30 - Sun, Nov 2
United Airlines Logo
5:29 pm - 8:07 pmSTL-SFO
4h 38mnonstop
United Airlines Logo
10:35 am - 4:27 pmSFO-STL
3h 52mnonstop
$249United Airlines
Find Deal

Everything you should know

Cheapest round-trip
$175
Overall average: $409
Frontier
Thu 10/23Wed 11/5
STL - SFO • 1 stop
Cheapest non-stop
$249
Typical prices: $323-459
United Airlines
Thu 10/30Sun 11/2
STL - SFO • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$82
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 13% 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
Pacifica
Capitola
Emeryville
Rohnert Park
Millbrae
Campbell
Mill Valley
Newark
Novato
Windsor
Belmont
Los Altos
West Sacramento
Richmond
Union City
Jenner
Corte Madera
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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