FARNBOROUGH, England, July 22 (Reuters) - Korean Air

has struck a deal to buy 20 Boeing 777X and

20 787-10 jets, the South Korean airline said at the Farnborough

Airshow on Monday.

The deal, which confirms an earlier Reuters story, is worth

around $7 billion, according to estimated delivery prices from

Cirium Ascend.

The airline also has an option to buy 10 more 787-10s, it

said in a statement.