Cheap flights from Chicago, IL to San Diego, CA

Flights starting at $120. Choose between United Airlines, Spirit Airlines, or Frontier Airlines to find the best price.

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Travelers usually depart from O Hare International, Chicago Midway International, Chicago, IL - Union Station, Chicago Rockford International, or Chicago Downtown Greyhound Station when they travel from Chicago to San Diego. Book your trip to arrive at San Diego International, San Diego, CA - Old Town, San Diego, CA Bus Station, San Diego, CA - Santa Fe, or McClellan–Palomar. The distance between Chicago and San Diego is 2771 km. The most popular airlines for this route are United Airlines, Spirit Airlines, Frontier Airlines, American Airlines, and Alaska Airlines. Chicago and San Diego have 263 direct flights per week.

Weekly direct flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Direct flights8898978
Fly direct with

American Airlines on Tuesdays, Wednesdays, Thursdays, Fridays, and Saturdays.

Alaska Airlines on Mondays, Tuesdays, Wednesdays, Fridays, Saturdays, and Sundays.

United Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Check-in for a flight from Chicago to San Diego

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
United AirlinesUALUAYesNo
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
American AirlinesAALAAYesNo
Alaska AirlinesASAASYesOpens 24 days before flight
Closes 1 hours before flight
Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

Frequently asked questions

How long does it take to travel from Chicago to San Diego?
A one-way nonstop (direct) flight between Chicago and San Diego takes around 4.2 hours.
What is the flight distance between Chicago and San Diego?
The flight distance between Chicago and San Diego is 2771 km.
What airlines offer nonstop (direct) flights between Chicago and San Diego?
Several carriers operate flights between Chicago and San Diego. Airlines offering nonstop (direct) flights include American Airlines, Alaska Airlines, United Airlines.
What are the most popular routes to and from Chicago?
Travelers frequently search for route combinations, such as Chicago and Kuwait City, Lima.
What are the most popular routes to and from San Diego?
Travelers frequently search for route combinations, such as San Diego and Bogotá, Dallas, Houston, Phoenix, Fort Lauderdale, Toronto, Montreal, Vancouver, Calgary, Winnipeg, Edmonton, Ottawa, Kelowna, Quebec City, Victoria, Saskatoon.
Which airports are there in Chicago?
Chicago is mainly served by O Hare International. But there are other airports nearby, including Chicago Midway International, Chicago Rockford International.
What airports are near Chicago?
The main airport in Chicago is O Hare International. It is also served by Gerald R. Ford International, General Mitchell International, Dane County Regional, General Wayne A. Downing Peoria International, Fort Wayne International, South Bend International, Central Illinois Regional, Quad City International, Kalamazoo/Battle Creek International, Decatur.
What airports are near San Diego?
The main airport in San Diego is San Diego International. It is also served by Tijuana International, Ontario International, John Wayne, Hollywood Burbank, Mexicali International, Palm Springs International, Imperial County, Long Beach, Yuma International, Hawthorne Municipal.
What buses and trains depart from Chicago?
A number of bus and train companies depart from Chicago, including Amtrak train.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Chicago and San Diego?
What is Virtual Interlining and how do I use it?
Which airlines fly between Chicago and San Diego?
When's the best time to travel between Chicago and San Diego?
What flights operate between Chicago and San Diego?
How many airports are there near Chicago?
How many airports are there near San Diego?
Is it possible to reach Chicago by bus or train?
What time do nonstop (direct) flights between Chicago and San Diego depart?
What time do nonstop (direct) flights between Chicago and San Diego arrive?
What time do flights between Chicago and San Diego depart?
What time do flights between Chicago and San Diego arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

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