Ryanair has seen bookings from the US rise 50% since launching a website that takes bookings in dollars.
The dedicated US website went live two months ago.
According to Ryanair, thousands of Americans book with the airline each year.
The most popular route is London Stansted-Dublin, followed by Edinburgh-Dublin, Rome-Barcelona, Paris-Dublin and Frankfurt Hahn-London Stansted.
Ryanair said most bookings come from customers living in California, New York, Texas, Florida and New Jersey.
