SFO

$80 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 9/29. 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

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

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Fri, Oct 17 - Fri, Oct 24
Frontier Logo
7:52 pm - 12:14 amSTL-SFO
6h 22m1 stop
Frontier Logo
6:15 pm - 9:07 amSFO-STL
12h 52m2 stops
$192Frontier
Find Deal
Sat, Oct 25 - Mon, Oct 27
Frontier Logo
4:51 pm - 9:29 pmSTL-SFO
6h 38m1 stop
Frontier Logo
8:08 pm - 9:07 amSFO-STL
10h 59m2 stops
$193Frontier
Find Deal
Thu, Oct 23 - Wed, Oct 29
Frontier Logo
10:17 am - 4:00 pmSTL-SFO
7h 43m1 stop
Frontier Logo
9:55 pm - 5:27 pmSFO-STL
17h 32m2 stops
$194Frontier
Find Deal
Wed, Dec 24 - Wed, Dec 31
American Airlines Logo
5:30 pm - 8:18 pmORD-SFO
4h 48mnonstop
American Airlines Logo
6:00 am - 12:34 pmSFO-ORD
4h 34mnonstop
$199American Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Logo
7:15 am - 10:27 pmORD-SFO
17h 12m1 stop
Logo
10:26 am - 11:59 pmSFO-ORD
11h 33m1 stop
$208
Find Deal
Sat, Sep 20 - Tue, Sep 23
Logo
12:46 pm - 10:43 amORD-SFO
23h 57m2 stops
Logo
8:00 am - 6:51 pmSFO-ORD
8h 51m1 stop
$209
Find Deal
Tue, Sep 30 - Tue, Oct 7
United Airlines Logo
2:35 pm - 5:20 pmORD-SFO
4h 45mnonstop
United Airlines Logo
10:35 pm - 4:52 amSFO-ORD
4h 17mnonstop
$239United Airlines
Find Deal
Wed, Oct 8 - Mon, Oct 13
Alaska Airlines Logo
8:20 am - 2:01 pmORD-SFO
7h 41m1 stop
Alaska Airlines Logo
6:45 am - 11:59 pmSFO-ORD
15h 14m1 stop
$244Alaska Airlines
Find Deal
Sat, Oct 18 - Wed, Oct 22
United Airlines Logo
6:15 am - 8:53 amORD-SFO
4h 38mnonstop
United Airlines Logo
4:55 pm - 11:12 pmSFO-ORD
4h 17mnonstop
$245United Airlines
Find Deal
Thu, Oct 16 - Thu, Oct 23
American Airlines Logo
4:38 pm - 11:23 pmPIA-SFO
8h 45m1 stop
American Airlines Logo
2:01 pm - 11:05 pmSFO-PIA
7h 04m1 stop
$309American Airlines
Find Deal
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$80
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 6% 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
Union City
West Sacramento
Richmond
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)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.