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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$37 CHEAP FLIGHTS from Illinois to San Diego

SAN

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

...and more

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.

Flights Deals

Cheap Flight Deals 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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to San Diego

KAYAK's recommended round-trip deals from the most popular airlines that fly from Illinois to San Diego.

Discover the best prices for you by selecting your travel dates on KAYAK.

11:50 am - 7:53 pmORD-SAN

10h 03m1 stop

8:48 pm - 10:55 amSAN-ORD

12h 07m1 stop

$117Spirit Airlines

Find Deal

ons, maj 28 - tis, jun 3

9:02 pm - 7:13 amORD-SAN

12h 11m1 stop

8:48 pm - 5:25 amSAN-ORD

6h 37m1 stop

$119Spirit Airlines

Find Deal

tis, maj 20 - ons, maj 28

1:56 pm - 4:08 pmORD-SAN

4h 12mnonstop

4:53 pm - 10:56 pmSAN-ORD

4h 03mnonstop

$136Frontier

Find Deal

tis, jun 17 - tis, jun 24

1:56 pm - 4:08 pmORD-SAN

4h 12mnonstop

4:53 pm - 10:56 pmSAN-ORD

4h 03mnonstop

$137Frontier

Find Deal

lör, jun 14 - tis, jun 17

8:14 pm - 11:19 pmORD-SAN

29h 05m1 stop

8:48 pm - 5:25 amSAN-ORD

6h 37m1 stop

$144

Find Deal

mån, maj 19 - ons, maj 28

9:50 pm - 5:57 pmORD-SAN

22h 07m1 stop

8:48 pm - 10:55 amSAN-ORD

12h 07m1 stop

$150

Find Deal

fre, maj 30 - tis, jun 3

9:00 pm - 11:15 pmMDW-SAN

4h 15mnonstop

5:35 pm - 11:35 pmSAN-MDW

4h 00mnonstop

$237Southwest

Find Deal

lör, jun 7 - lör, jun 14

5:00 am - 1:38 pmMLI-SAN

10h 38m1 stop

12:43 pm - 9:24 pmSAN-MLI

6h 41m1 stop

$240American Airlines

Find Deal

lör, maj 31 - tis, jun 3

6:30 am - 12:48 pmMLI-SAN

8h 18m1 stop

10:00 am - 9:45 pmSAN-MLI

9h 45m2 stops

$245American Airlines

Find Deal

lör, maj 31 - tis, jun 3

5:10 pm - 10:35 pmMDW-SAN

7h 25m1 stop

5:35 pm - 11:35 pmSAN-MDW

4h 00mnonstop

$247Southwest

Find Deal

lör, jun 7 - lör, jun 14

Useful Info

Low season	January
High season	July
Cheapest flight	$37

Best time to beat the crowds with an average 8% drop in price.

Most popular time to fly with an average 2% increase in price.

Flight from Chicago O'Hare Airport 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.

Everything you need to know for your flight to San Diego

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

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

San Diego (SAN)

SAN

$37 Find Cheap Flights from Illinois to San Diego

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

Cheap Flight Deals from Illinois to San Diego

Recent round-trip flight deals from Illinois to San Diego

Recent one-way flight deals from Illinois to San Diego

Recent last minute flight deals from Illinois to San Diego

Recent direct flight deals from Illinois to San Diego

Good to know

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.

Everything you need to know for your flight to San Diego

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

Cabin class types available on flights to Illinois

Complete your trip to San Diego with a hotel stay or car rental

Find direct flights for San Diego

Flights to other popular destinations

Flights from domestic origins to San Diego

Choose which airport to fly into in San Diego

Find deals for your return flight