The Christmas rush is set to push passenger numbers at Belfast International to over five million for the first time in eight years, the airport has said.
A spokesman said it would break the five million mark tomorrow, with nearly 700 inbound and outbound flights carrying around 110,000 passengers this week.
Managing director Graham Keddie said new routes and increased capacity was driving its growth.
And the airport is expecting an even busier 2017, surpassing 2008's 5.3m. Friday will be its busiest day with 120-plus flights carrying around 20,000 passengers.
Meanwhile, Dublin Airport has said it's now welcomed over 27 million passengers this year.