SAN

$60 Find Cheap Flights from Illinois to San Diego - Compare and Save

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 Diego departing on 10/21. 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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Flight Deals

Cheap Flights from Illinois to San Diego

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to San Diego 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 Diego

Wed, Aug 26 - Wed, Sep 2
Frontier Logo
6:45 pm - 8:14 pm
STL
-
SAN
27h 29m
1 stop
Frontier Logo
3:45 pm - 5:22 pm
SAN
-
STL
23h 37m
2 stops
$256Frontier
Sat, Oct 3 - Sat, Oct 10
Frontier Logo
8:10 pm - 11:51 pm
STL
-
SAN
5h 41m
1 stop
Frontier Logo
6:25 am - 9:40 am
SAN
-
STL
25h 15m
2 stops
$256Frontier
Tue, Sep 22 - Fri, Sep 25
Alaska Airlines Logo
6:29 am - 1:21 pm
STL
-
SAN
8h 52m
1 stop
Alaska Airlines Logo
6:55 am - 5:10 pm
SAN
-
STL
8h 15m
1 stop
$257Alaska Airlines
Tue, Sep 22 - Thu, Sep 24
Alaska Airlines Logo
6:29 am - 2:42 pm
STL
-
SAN
10h 13m
1 stop
Alaska Airlines Logo
6:55 am - 5:10 pm
SAN
-
STL
8h 15m
1 stop
$257Alaska Airlines
Thu, Oct 15 - Tue, Oct 20
Delta Logo
1:55 pm - 10:12 pm
ORD
-
SAN
10h 17m
1 stop
Delta Logo
6:15 am - 4:32 pm
SAN
-
ORD
8h 17m
1 stop
$267Delta
Wed, Nov 18 - Mon, Dec 7
Delta Logo
6:28 pm - 10:57 pm
ORD
-
SAN
6h 29m
1 stop
Delta Logo
11:34 am - 8:25 pm
SAN
-
ORD
6h 51m
1 stop
$267Delta
Thu, Oct 22 - Mon, Oct 26
United Airlines Logo
7:05 am - 9:32 am
ORD
-
SAN
4h 27mnonstop
United Airlines Logo
2:30 pm - 11:02 pm
SAN
-
ORD
6h 32m
1 stop
$267United Airlines
Thu, Oct 15 - Mon, Oct 19
United Airlines Logo
7:00 am - 11:35 am
ORD
-
SAN
6h 35m
1 stop
United Airlines Logo
4:55 pm - 10:59 pm
SAN
-
ORD
4h 04mnonstop
$267United Airlines
Fri, Oct 9 - Tue, Oct 13
American Airlines Logo
9:08 pm - 11:41 pm
ORD
-
SAN
4h 33mnonstop
American Airlines Logo
6:15 am - 12:42 pm
SAN
-
ORD
4h 27mnonstop
$267American Airlines
Sat, Sep 12 - Fri, Sep 18
American Airlines Logo
3:08 pm - 5:29 pm
ORD
-
SAN
4h 21mnonstop
American Airlines Logo
6:15 am - 12:46 pm
SAN
-
ORD
4h 31mnonstop
$267American Airlines
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Good to know

Low season

January

Cheapest flight

$60
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from St. Louis to San Diego

FAQs for booking flights from Illinois to San Diego

  • How does KAYAK find such low prices on flights from Illinois to San Diego?

    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 Diego.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Diego?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego 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 Diego?

    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 Diego 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 Diego?

    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 Diego 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 Diego?

Book flights to San Diego if you plan to visit one of these locations
National City
Julian
Borrego Springs
Poway
Alpine
Santee
Lemon Grove

Everything you need to know for your flight to San Diego

Information on the airport you'll fly into in San Diego

San Diego (SAN)