The Welsh football association offloaded 14 supporters from the flight to Minsk for a Euro 2000 qualifying match. A Stansted airport spokesman said British World Airlines, which organised the flight, had arranged to fly the ejected fans to Minsk from Gatwick.
One of the fans, Gwilym Boore, said: "We have been dumped. The Welsh FA seemed more concerned about getting the FA Cup Final to Cardiff than looking after their hard-core fans."
A football association spokesman said: "It was a choice of whether the party went or the fans. It's most regrettable, because the fans are most important to us."