Chennai Express has earned nearly $2.5 million at the US-Canada box office, including $250,000 in paid previews. An excerpt from the Weekend Report :-
Chennai Express opened to $2.2 million from 196 locations this weekend, which is the highest debut ever for a Bollywood movie. It also ranks sixth all-time among foreign language movies, though that’s skewed by the fact that many foreign movies initially open in only a handful of locations.
You can check it out here :- http://www.boxofficemojo.com/movies/?id=chennaiexpress.htm