Only 63% Full: Aer Lingus’ 10 Emptiest US Routes Revealed [Updated]

Aer Lingus is the ninth-largest operator between Europe and the US by passenger numbers. According to the country’s Department of Transportation (DOT), the Irish flag carrier transported 2.8 million passengers in this market between February 2025 and January 2026. Compared to the prior 12 months, traffic rose by 5.1%, which was nine times more than for the entire Europe to US market (0.6%).