Jetblue has round trip airfares travelling from San Diego (SAN) to Ft Lauderdale (FLL) for $ 275 including taxes and fees. This is nonstop service.

Travel availability:
Departs SAN: May 23, 27, 28, 30; June 1, 3, 4, 5, 7
Returns on June 6, 14, 15, 21, 22

Use dates and book it on Orbitz [orbitz.com] or Jetblue [jetblue.com] directly. Be sure to check your Amex Offer for the Jetblue credit statement of $ 40 with purchase of $ 200 or more.