Unionized flight attendants — and flight attendants at airlines whose procedures mirror union work rules — get to work the most desirable trips based on seniority. Senior flight attendants at large international airlines can jet away to Sydney, to Buenos Aires, to Paris while more junior flight attendants overnight in Des Moines.
American Airlines flight attendants have created a secondary market renting out their seniority. They sell prime trip assignments to junior flight attendants, reportedly on average for $200 per trip.