$129 Cheap Delta flights Chicago (ORD) to San Diego (SAN)

Scoring cheap one-way Delta Air Lines flights from ORD to SAN from $129 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $183 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Delta Air Lines flights to San Diego are often more affordable in the low-season months of January and November. Whether you need a one-way or round-trip ticket, you could score a better deal then.

To find cheap Delta Air Lines fares from O’Hare Intl. Airport (ORD) to San Diego Intl. Airport (SAN), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the cost. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct route from ORD to SAN with Delta Air Lines or other airlines, select the “Nonstop” filter when searching for flights.

Sort your results by “Morning” and “Early Morning” to browse the earliest departures from ORD to SAN. Setting off early means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

San Diego Intl. Airport (SAN) is the primary San Diego hub for Delta Air Lines flights from O’Hare Intl. Airport (ORD).

Delta Air Lines makes flying from ORD to SAN enjoyable with a rewarding loyalty program and an excellent in-flight experience. You also have the chance to earn points with Delta SkyMiles. Don’t forget to join our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are often free within 24 hours of making a booking, but your airline may charge you after that time. For more details about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to change your plans without additional charges, tick the “Changes included” and “No cancel fee” filters when planning your next getaway.