JERUSALEM, April 14 (Reuters) - Israeli airlines said

operations were returning to normal on Sunday after an overnight

attack by Iranian missiles and drones closed the airspace and

led to flight cancellations.

Israel reopened its airspace as of 7:30 a.m. (0430 GMT) on

Sunday, adding that flight schedules from Tel Aviv were expected

to be affected and travellers should check flight times before

going to Ben Gurion International Airport.

Flag carrier El Al said it had resumed operations

and was "working to stabilise the flight schedule as soon as

possible".

"El Al will continue to operate as much as possible to

preserve the air bridge to and from Israel," it said.

The airline had cancelled 15 flights to Europe, Dubai and

Moscow scheduled for Sunday while flights that had taken off

from Bangkok and Phuket were forced to return.

Smaller Israeli carrier Arkia said it was in the process of

making adjustments to its flight schedule after initially

postponing flights to Athens, Milan and Geneva.

According to the airports authority, most flights of foreign

carriers have been delayed, including Sunday flights to London

by Wizz Air ( WZZAF ), to New Delhi by Air India, to Madrid by Iberia and

to Marseille by Air France.

El Al's flights to London, Frankfurt, Berlin, Bucharest,

Athens, Paris and Rome and Ethiopian Airline's flight to Addis

Ababa were able to take off.