A319
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 180; Flight Crew Total 7800; Flight Crew Type 1200
Situational Awareness; Communication Breakdown
ATC Issue All Types
Air Traffic Control Provided Assistance; Flight Crew Became Reoriented
Human Factors; Airspace Structure
The flight was a scheduled part 121 flight to SAN. The clearance was the LYNDI4 RNAV arrival to SAN.During the departure climb; departure cleared the flight direct to LYNDE; flight plan route.Since there were two waypoints with the same pronunciation loaded in the active MCDU flight plan; I requested clarification from departure as to whether they cleared us to LYNDE on the departure or if they cleared us to LYNDI on the LYNDI arrival.They confirmed that the flight was cleared to LYNDE; and spelled the fix phonetically.We then executed the direct to LYNDE in the MCDU.Departure then asked us the spelling of the other LYNDE/LYNDI in our flight plan. He remarked that he would note this so that the confusion could be avoided in the future.For this specific city pairing and this specific flight plan routing; recommend that flight crews and ATC be aware of the two waypoints with the same pronunciation and to clarify exactly which fix they are cleared to in the future.
A319 First Officer pointed out to ATC that on his route there were two waypoints with similar spelling and identical pronunciation; LYNDE and LYNDI.