Fly nonstop from Chicago to San Diego for $127 round-trip on United.
Seen below, we found seats departing ORD on Wednesday, August 26, returning from SAN on Tuesday, September 1.
Other dates are also available on Tuesdays/Wednesdays/Saturdays, from September 26 through November 7.
For booking info, see our Fare Details.
Need a room in San Diego? Here's a look at what's available for the above dates on Hotelwatchdog.