[08/06/2015 @ 11:26 AM] Deal looks dead. Fare gone.
United is offering round-trip flights from Houston (IAH) to New York (LGA) for $150, with a connection. Cheapest flights TUE/WED/SAT from August to November.
FYI: Flights from Dallas are $80 Nonstop round-trip, so it may be worth the drive for the cheaper price and better routing on AA.