A second flight bound for Los Angeles has declared an emergency over Scotland in the past two days.

Delta Air Lines flight DL187 from London Heathrow to Los Angeles (LAX) made a u-turn over Glasgow around 6pm on Monday evening.

It did so shortly after declaring a 'Squawk 7700' while travelling at an altitude of 34,000 feet. 

READ MORE: Virgin Atlantic flight to L.A. declares mid-air emergency over Hebrides

Footage from flight radar app FlightRadar24 showed the flight then landing safely at London Heathrow around 7:11pm.

Unconfirmed reports online suggest the reason for the diversion was because one of the flight deck crew felt unwell. 

A Delta Air Lines spokesperson told The Herald: "Yesterday (18 Sept), Delta’s flight DL187 en route from LHR to LAX returned to LHR shortly after take-off due to a medical emergency. 

"The aircraft landed safely and passengers deplaned normally.  Customers were provided hotel accommodation and have been reaccommodated on alternative flights.  We apologize to our customers for the delay in their travel plans."

It comes after a Virgin Atlantic flight bound for Los Angeles declared a mid-air emergency over Scotland on Sunday evening.

Flight VS23 from London Heathrow, operating on a Boeing 787 aircraft, declared a 'Squawk 7700' while flying over the Hebrides.

Virgin Atlantic later confirmed that the aircraft returned to Heathrow "as a precautionary measure" as a result of a "minor technical issue".