An amalgamation of Ocean's 11, John Q and Speed?
The Ocean's 11 part is obvious, a group of criminals robbing a Casino which was interesting at the time since most armed robbery stories are BANKS.
It is similar to John Q in that a desperate man resorts to felonious crime because he is desperate to help a son who needs very expensive medical care, he does not take a hospital hostage but commits other crimes including taking a bus hostage.
And I compare it to speed because it involves taking a bus and it's occupants hostage. Not quite in the same way as in Speed but still hostages and it still involves a police chase/pursuit of the bus.