LONDON, Jan 2 (Reuters) - AirBaltic will cancel a number

of summer flights owing to inspection and maintenance delays

from RTX-owned engine supplier Pratt and Whitney.

The airline will cancel 19 routes and reduce flight

frequency on 21 others, it said, adding that 4,670 flights will

be cancelled in total.

AirBaltic and other airlines operating Airbus

planes with Pratt and Whitney engines, such as Wizz Air ( WZZAF )

, have had to contend with grounded aircraft because of

Pratt and Whitney's engine maintenance issues.

British Airways amended some of its routes late last year

because of delays to engine parts deliveries from Rolls-Royce

.