Aer Lingus pilots are planning a 48-hour stoppage from midnight on August 21 that is likely to cause severe disruption to services. The IMPACT trade union is striking over plans to pay workers in Northern Ireland less money than those in the Republic of Ireland.
This comes after Aer Lingus said it would set up its first base outside the Republic of Ireland at Belfast International Airport employing 100 new people, including pilots and cabin crew.
The new base, which would start in December, will offer flights to London Heathrow and seven European destinations, while axing its Shannon-Heathrow route.
The pilots, nearly 500 in number are striking following claims that pilots at the new Belfast base would not be paid the same as those flying out of Dublin.
Aer Lingus have reacted angrily to the news, saying it would severely disrupt travelers.