THE B757-200 CREW DETECTED A FUEL LEAK INFLT. THEY DECLARED AN EMER AND DIVERTED TO A NEARBY ARPT.

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WE WERE FLYING FROM ZZZ1 TO ZZZ2; WHEN THE FUEL LEAK WAS DISCOVERED. AFTER IT WAS VERIFIED; WE DECIDED TO DIVERT TO ZZZ3 AND CALLED COMPANY WITH THE INFO. WE THEN DECLARED AN EMER AND ASKED CTR FOR A DIVERT TO ZZZ3. AS WE BEGAN TO RUN THE CHKLIST AND SHUT DOWN THE ENG; COMPANY CALLED BACK AND SAID IT WOULD BE CLOSER FOR US TO DIVERT TO ZZZ4 OR ZZZ5. AT THIS TIME; WE WERE APPROX 20 NM N OF ZZZ4 AND 40 NM SW OF ZZZ5. BOTH ARPTS WOULD HAVE REQUIRED MANEUVERING IN THE DSCNT SINCE WE WERE AT FL310. WE WANTED MORE TIME TO DSND AND PREPARE FOR LNDG. SO WE CONTINUED TO ZZZ3 AND LANDED WITHOUT INCIDENT. I KNOW THAT ON INITIAL DECISION TO DIVERT TO ZZZ3 WAS INFLUENCED BY THE FACT THAT WE HAVE MAINT THERE AND ARE FAMILIAR WITH THE FIELD. OUR CHKLIST STATES THAT WE WILL LAND AT THE NEAREST SUITABLE ARPT. ZZZ4 WAS CLOSER; SO THAT IS WHY I QUESTION OUR DECISION TO DIVERT TO ZZZ3. I DON'T KNOW IF CORRECTIVE ACTION IS REQUIRED; EXCEPT TO CLARIFY FOR MYSELF; THE ACTUAL REQUIREMENTS FOR THE NEAREST SUITABLE ARPT. I HAVE RECURRENT TRAINING IN FEBRUARY OR MARCH AND EXPECT THE TOPIC TO BE DISCUSSED AT LENGTH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT THE ACFT TYPE WAS A B757-200. THIS WAS NOT STATED IN EITHER OF THE CREW MEMBER'S RPTS. THE RPTR ALSO STATED THAT THE FUEL LEAK LOCATION WAS IN AN ENG COMPONENT IN WHICH A GASKET FAILED.