LONDON, Writeoffs sought: Page 7 (Kyodo) Japan Airlines Corp. plans to reduce the frequency of daily round-trip flights on the Narita-London route to once a day from twice starting Dec. 7, according to JAL sources.

The struggling airline will formally announce the planned cutback in early November as part of the ongoing review of international operations to revive its profitability, the sources said.

The step would leave JAL with no European route on which it operates more than one daily round-trip flight, except for routes where it does so under code-sharing arrangements.

JAL has already informed travel agencies and other parties of the plan.

Travelers have already booked seats on the flights for the yearend and other days to be affected by the cutback. One of the sources suggested JAL will do its utmost to "ensure that our customers will not be inconvenienced" by the reduction.