Southwest and JetBlue have round-trip flights from Houston (HOU) to New York (EWR/JFK) starting at $169 with a connection. $189 NONSTOP. About $83 to $99 each-way. Flights from January to mid-March. Origin/Destination reversible.
Note: This deal is about +$30 more than we usually aim for, but since there are no change fees on Southwest, if it gets priced for lower you can get the difference refunded as a travel voucher.
Note: JetBlue is a bit more expensive than Southwest, but has better time slots for their departures and arrivals and better weekend availability on this deal.
Note: You may find additional savings if you book your Flight+Hotel together as a package on Southwest Vacations and use the US100OFF coupon-code at checkout.