She flew on Dutch carrier KLM from New York to Budapest, with a stopover in Amsterdam, using two seats.
But when her symptoms worsened while on vacation, she made an appointment with her doctors in New York and attempted to board a flight on October 15, 2012. However, she was unable to reach her reserved seats from her wheelchair and was told to disembark.
After waiting five hours in the Budapest airport, the couple drove four-and-a-half hours to Prague to take a direct flight with US airline Delta, which had been warned of her disability.
But Delta did not provide a means of bringing Vilma to her seat, so the couple was forced to return to Hungary.
A third flight, with Lufthansa on October 22, was reserved, and the airline was informed of Vilma's health condition.
She was trying to reach her seat, her widower said, when the flight captain asked her to disembark, saying she was delaying the flight and other passengers needed to make their connections.
Getting her off the plane took between 25 and 30 minutes, according to the lawsuit.
She died two days later.
Her husband accused the airlines of "gross negligence and recklessness/outrageous conduct," that led to his wife's "wrongful death."