SFO

$59 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 2/28. 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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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$184
Overall average: $368
Frontier
Fri 2/13Wed 2/18
STL - SFO • 1 stop
Cheapest non-stop
$250
Typical prices: $227-$357
Southwest
Sat 2/14Sat 2/21
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

Fri, Feb 13 - Wed, Feb 18
Frontier Logo
10:11 pm - 10:50 am
STL
-
SFO
14h 39m
1 stop
Frontier Logo
6:55 am - 3:53 pm
SFO
-
STL
6h 58m
1 stop
$184Frontier
Fri, Feb 27 - Mon, Mar 2
Frontier Logo
10:11 pm - 5:58 pm
STL
-
SFO
21h 47m
2 stops
Frontier Logo
9:03 am - 9:13 pm
SFO
-
STL
10h 10m
1 stop
$187Frontier
Wed, Feb 18 - Tue, Mar 3
Frontier Logo
4:51 pm - 8:03 am
STL
-
SFO
17h 12m
1 stop
Frontier Logo
8:25 am - 3:53 pm
SFO
-
STL
29h 28m
1 stop
$190Frontier
Thu, Apr 30 - Tue, May 5
Alaska Airlines Logo
3:52 pm - 11:48 pm
ORD
-
SFO
9h 56m
1 stop
Alaska Airlines Logo
7:15 am - 7:03 pm
SFO
-
ORD
9h 48m
1 stop
$240Alaska Airlines
Wed, Feb 18 - Tue, Feb 24
Southwest Logo
8:10 am - 1:45 pm
MDW
-
SFO
7h 35m
1 stop
Southwest Logo
5:30 am - 6:45 pm
SFO
-
MDW
11h 15m
2 stops
$242Southwest
Thu, Apr 2 - Tue, Apr 7
Multiple Airlines Logo
4:13 pm - 10:52 pm
ORD
-
SFO
8h 39m
1 stop
Multiple Airlines Logo
10:03 pm - 10:50 am
SFO
-
ORD
10h 47m
1 stop
$243Multiple Airlines
Tue, Apr 21 - Wed, Apr 29
Southwest Logo
2:55 pm - 10:45 pm
MDW
-
SFO
9h 50m
1 stop
Southwest Logo
11:25 pm - 5:40 am
SFO
-
MDW
4h 15mnonstop
$247Southwest
Fri, Mar 13 - Wed, Mar 18
Multiple Airlines Logo
7:00 am - 9:55 pm
ORD
-
SFO
16h 55m
1 stop
Multiple Airlines Logo
10:38 pm - 10:52 am
SFO
-
ORD
10h 14m
1 stop
$248Multiple Airlines
Sat, Feb 14 - Wed, Feb 25
Delta Logo
1:29 pm - 6:36 pm
MDW
-
SFO
7h 07m
1 stop
Delta Logo
12:40 am - 9:06 am
SFO
-
MDW
6h 26m
1 stop
$250Delta
Thu, Apr 30 - Sun, May 3
Delta Logo
1:30 pm - 8:24 pm
EVV
-
SFO
8h 54m
1 stop
Delta Logo
9:35 pm - 9:31 am
SFO
-
EVV
9h 56m
1 stop
$459Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$59
Best time to beat the crowds with an average 4% 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
Emeryville
Capitola
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)