The airline announced its plans to cancel up to 50 flights a day for the time period due to a shortage of pilots thanks to holiday entitlement. Up to 400,000 passengers could be affected.
Ms Armstrong said compensation could be on the cards for those impacted.
“Under EU guidelines, passengers are entitled to assistance and compensation for a disruption within an airline’s control, while full refunds should be offered for flights cancelled at short notice. In addition, people are entirely within their rights to claim compensation from the airline.
“I would encourage passengers who may be affected by this matter to seek advice from organisations such as the Consumer Council, who will be able to help them discover what the best option is for them.”