Det låter som om det kunde vara Natten de gjorde fröken vacker (1977), en tv-film. Den största delen av din beskrivning är echoed i det här utdraget från en IMDb användarrecension :
Phil Silvers, in a rare departure from Bilko, plays the host of a beauty pageant. Him along with 5 beauty queens and one overbearing Mother all get kidnapped and put up for ransom by a group of terrorists. What the terrorists do not know is one of the pilots is carrying a deadly highly contagious biological nerve agent.
It all gets rather dumb and the Mother urges her daughter to give herself to one of the terrorists to help them escape. In a thoroughly predictable ending all the terrorists and one of the pilots die and the beauty queen gets away from her overbearing mother.