$124 Find Cheap Flights from Chicago to San Diego - Compare and Save

Unlimited free Wi-Fi is available at the O'Hare International Airport throughout all terminals. If you want to access the Wi-Fi, enable wireless connection on your device and connect to “_Free_ORD _Wi-Fi” or “Boingo Hotspot.”

For flights from Chicago to San Diego, there are several airlines that serve this route, including American Airlines and United Airlines. Both offer nonstop flights from the O'Hare International Airport to the San Diego International Airport. You can also find flights by Frontier, which flies through Denver International Airport (DEN), but it could take longer, so book through KAYAK to compare routes and find the best option.

The O'Hare International Airport offers a chapel, a peaceful space in the busy airport you can use for prayers, liturgies, and worship. It’s equipped with prayer books, worship materials, rosaries, rugs, and Juma ablution facilities. The facility is in Terminal 2 Mezzanine level above Delta Air ticket counters next to USO.

Mothers can access three lactation rooms found in each terminal post-security. In Terminal 1 West, you can find the lactation rooms on the second level. The rooms in Terminal 1 East are near the security checkpoint, while in Terminal 2 West, they’re on the second level. Each of these rooms is equipped with electrical outlets, artwork, a handwashing station, soft lighting, comfortable seating, and a children’s seat.

There are no hotels within the airport. The closest near the airport is the Sheraton Hotel & Marina, located at a 10min walking distance or 3min if you’re using the free hotel shuttle. The Hampton Inn & Suites is located about a mile away, a 5min drive from the terminal. You can also book the TownPlace Suites by Marriott, located at a 5min driving distance from the airport.

Among airlines operating Chicago to San Diego flights:

• United Airlines: offers extra legroom; offers free seat selection
• Alaska Airlines: offers extra legroom; offers free seat selection
• American Airlines: offers extra legroom; offers free seat selection
• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

4 airlines operate flights between Chicago and San Diego. The airlines offering nonstop flights on this route include:
• American Airlines
• United Airlines
• Southwest
• Alaska Airlines

Flights from Chicago to San Diego may depart from several airports in Chicago area, including Chicago Midway (MDW), Chicago O'Hare Intl (ORD) and Chicago Greater Rockford (RFD). Flights usually arrive at San Diego (SAN).

Here are some options for this route, based on selected ticket types and cabin classes:

• United Airlines: a cabin bag and a checked bag in Economy Class
• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Four cabin classes are available on flights from Chicago to San Diego:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $193 round-trip via Minneapolis St Paul (MSP), compared to $315 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

One-stop flights from Chicago to San Diego most commonly connect through:

• Denver Intl (DEN) - 30% of one-stop connections
• Chicago O'Hare Intl (ORD) - 27% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) - 11% of one-stop connections
• Dallas/Fort Worth (DFW) - 10% of one-stop connections

Denver Intl (DEN) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 12% on the Chicago to San Diego route. Wednesday is the cheapest departure day at $304 round-trip on average, while Sunday is the most expensive at $343, a difference of $39. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Chicago to San Diego flights, with 47% of flights leaving in that window. Night departures account for 26%, afternoon flights for 14%, and evening flights for 13%.

Some of the most popular sights in San Diego are Gaslamp Quarter, San Diego Convention Center and SeaWorld San Diego. These are among the most viewed places in San Diego on KAYAK.

A nonstop flight from Chicago to San Diego takes 4h 28m, covering 1,732 miles.

These are the earliest and latest flight times available from Chicago to San Diego:

• Earliest: departs at 5:25 am and lands at 9:53 am
• Latest: departs at 9:38 pm and lands at 2:06 am.

The flight takes about 4h 28m.

Last-minute fares on this route - booked within 2 weeks of departure - run 44% above the route average of $314. Book 7 weeks before departure for the lowest fares.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $249 to $2,466. That means the highest observed fare was about 10x higher than the lowest one.

One-way fares from Chicago to San Diego are currently lower than usual. Average one-way flight prices are about $135, which is 32% below the typical average for this route.

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 6h 24m, compared with 6h 29m via Minneapolis St Paul (MSP) and 6h 31m via Phoenix Sky Harbor Intl (PHX).

San Diego is 2 hours behind Chicago (Pacific Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

San Diego Airport (SAN) hosts 5 major car rental companies, with daily rates starting from around $14 for economy cars. Top options include:
· Dollar
· Payless
· Europcar
· Thrifty
· Fox

Round-trip flights from Chicago to San Diego range from $226 to $398, with an average of $314 over the past 12 months. Anything below $226 counts as a good deal.

Three airlines offer in-flight Wi-Fi on Chicago to San Diego flights:

• • Alaska Airlines
• • American Airlines
• • JetBlue