German carrier Condor Airlines has informed San Diego airport officials that its first season of direct local flights to Frankfurt will be its last, though no specific explanation was provided.

The carrier conveyed the decision to San Diego International Airport officials on July 24, and airport officials did not elaborate on potential reasons. But Condor’s decision to discontinue the seasonal service, which began in early May and is slated to run through September, came not long after its much larger competitor, Germany’s Lufthansa, announced its own plans for San Diego-Frankfurt direct services starting in 2018.

“Condor Airlines will continue to offer nonstop flights to Frankfurt from San Diego until the end of this summer,” said Condor spokesman Johanne Winter, in a statement sent to local media outlets. “Following this, we will provide year-round service with easy connections to Frankfurt, Germany, with our partner Alaska Airlines via our large feeder network to over 120 destinations in Europe.”

Condor, which is part of British airline company Thomas Cook Group, announced in June 2016 that it would be offering direct local service between San Diego and Frankfurt on Mondays, Thursdays and Saturdays, between May 1 and Sept. 2.

Most recently, Germany’s Lufthansa in June announced plans to begin new direct service between San Diego and Frankfurt in the summer of 2018. That five-times-weekly service is expected to be offered year-round and will provide the local region’s first full-year access to continental Europe.