The Nashville International Airport added London to its list of 66 destinations with non-stop flights this year. But what's next?

Every quarter, airport officials hold meetings with airline representatives and discuss which cities have the most traffic coming to and from Nashville, but without direct flights.

Airlines have a limited number of planes in their fleets, so if they start a direct Nashville flight they'd likely have to end service to somewhere else.

“We try to convince an airline that if they came to Nashville, that if they added that flight, it would be profitable," Nashville International Airport CEO Doug Kreulen said at a regional planning summit in downtown Nashville Thursday.

Here's the short list of destinations without direct flights that Nashville officials are targeting for service, Kreulen said. Included are the average number of passengers flying per day, in each direction (to or from Nashville):

Top domestic targets

Portland, Ore.: 118 passengers per day Fort Myers, Fla.: 99 (service begins in November with Sun Country Airlines; Southwest Airlines provides service seasonally) Sacramento, Calif.: 96 Orange County, Calif.: 92 Hartford, Conn.: 88

Top international targets

Tokyo (and other Asian destinations): More than 30 to Tokyo Dublin (and other European destinations): More than 20 to Dublin Rome: Approximately 20 South America: Fewer than 10 to any one destination

Reach Mike Reicher at mreicher@tennessean.com or 615-259-8228 and on Twitter @mreicher.