SFO

$58 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

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Everything you should know

Cheapest round-trip
$167
Overall average: $368
Frontier
Wed 2/25Sat 2/28
STL - SFO • 1 stop
Cheapest non-stop
$248
Typical prices: $276-$562
Southwest
Wed 4/15Sat 4/18
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

Wed, Feb 25 - Sat, Feb 28
Frontier Logo
4:51 pm - 12:28 am
STL
-
SFO
9h 37m
1 stop
Frontier Logo
11:16 pm - 6:51 am
SFO
-
STL
29h 35m
1 stop
$167Frontier
Sat, Feb 14 - Mon, Feb 23
Frontier Logo
2:51 pm - 12:28 am
STL
-
SFO
11h 37m
1 stop
Frontier Logo
8:18 pm - 3:53 pm
SFO
-
STL
41h 35m
2 stops
$171Frontier
Sat, Feb 28 - Sat, Mar 7
Southwest Logo
4:40 pm - 9:55 pm
MDW
-
SFO
7h 15m
1 stop
Southwest Logo
5:00 am - 5:40 pm
SFO
-
MDW
10h 40m
2 stops
$244Southwest
Sat, Feb 14 - Tue, Feb 17
Southwest Logo
4:40 pm - 9:55 pm
MDW
-
SFO
7h 15m
1 stop
Southwest Logo
6:25 am - 12:25 pm
SFO
-
MDW
4h 00mnonstop
$245Southwest
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
7:00 am - 2:02 pm
ORD
-
SFO
9h 02m
1 stop
Multiple Airlines Logo
10:58 pm - 10:51 am
SFO
-
ORD
9h 53m
1 stop
$246Multiple Airlines
Wed, May 6 - Sun, May 10
United Airlines Logo
2:15 pm - 5:12 pm
ORD
-
SFO
4h 57mnonstop
United Airlines Logo
5:30 am - 11:55 am
SFO
-
ORD
4h 25mnonstop
$250United Airlines
Thu, Apr 2 - Wed, Apr 8
Delta Logo
10:45 am - 7:19 pm
MDW
-
SFO
10h 34m
1 stop
Delta Logo
10:40 pm - 8:53 am
SFO
-
MDW
8h 13m
1 stop
$252Delta
Fri, Apr 3 - Sat, Apr 11
Delta Logo
7:05 pm - 11:51 pm
ORD
-
SFO
6h 46m
1 stop
Delta Logo
6:25 am - 3:19 pm
SFO
-
ORD
6h 54m
1 stop
$252Delta
Fri, Apr 24 - Mon, Apr 27
United Airlines Logo
5:40 pm - 12:19 am
MLI
-
SFO
8h 39m
1 stop
United Airlines Logo
11:52 pm - 9:58 am
SFO
-
MLI
8h 06m
1 stop
$309United Airlines
Sun, Feb 1 - Thu, Feb 5
Multiple Airlines Logo
9:26 pm - 7:47 pm
MLI
-
SFO
24h 21m
2 stops
Multiple Airlines Logo
11:33 am - 8:36 pm
SFO
-
MLI
7h 03m
1 stop
$326Multiple Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$58
Best time to beat the crowds with an average 6% 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
Marina
Rohnert Park
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)