This airline has $69 tickets for flights from the US to Europe - but there's a major catch

On Monday, WOW Air announced that it is offering a limited amount of $69 tickets for flights from the US to Europe.

"It is WOW air's goal to consistently offer the lowest prices available for transatlantic travel," the Icelandic low-cost carrier's founder and CEO, Skúli Mogensen said in a statement. "Our mission is to enable everybody to fly and I think with these incredible prices we are making that dream a reality."

The sale includes flights from Boston, Washington D.C., Pittsburgh, Los Angeles, San Francisco, and Miami to Paris, Brussels, Stockholm, Dublin, Berlin, London, Copenhagen, and Edinburgh.

All flights will include a layover at WOW's home base in Reykjavik.

The $69 tickets go on sale Monday for travel between September and November of year.

There will only be around 1,800 tickets available, so act fast.

However, there's a major catch. The ultra-discount fares only apply to one-way flights from the US to Europe. But, to access these fares, passengers must book a round trip ticket with WOW. This means passengers can't fly WOW Air to Europe but shop around for a discounted fare on another airline for the return flight.

Even with a full-fare ticket for the flight from Europe, WOW Air's overall low-cost model means that the total cost will remain a relative bargain, provided you have a flexible schedule, travel light, and bring your own in-flight dining, and entertainment.

Founded in 2011, WOW Air currently operates a fleet of new Airbus A320-family and A330 jets to 32 destinations around the world.