U.S. airlines spent $6.66 billion on jet fuel in May, the second straight month that fuel costs topped $6 billion, according to government data.

US airline fuel costs hit $7B in May due to Middle East tensions. Crude oil reaching a new all-time high by December 31 at 7.5% YES.

Government data released Tuesday shows that U.S. airlines spent $6.66 billion on jet fuel in May. This marks an 84% increase from the previous year.