"Four U.S. airlines temporarily suspended flights to and from Mexico City on Thursday after a volcano 50 miles from the capital spewed ash, a spokesman for the city's international airport said."

"Three to eight flights on American Airlines, U.S. Airways, Delta Air Lines and Alaska Air Group have been postponed so far, Richard Jimenez, a representative for Mexico City's international airport told Reuters.

'The decision not to fly from Mexico City has been made by these airlines, but the airport is in operable conditions,' Andres Gomez, another airport representative, said on local television.

No Mexican airlines have halted operations, Gomez said."

Luc Cohen, Veronica Gomez, Miguel Gutierrez, and Anahi Rama report for Reuters July 5, 2013. [2]