When planning your trip to New Haven, CT, and having a fixable date for the trip, try booking the ticket in October. This month is considered the cheapest because there is no festive season or any type the airline offers the different types of coupons or discounts, so by using that, you can avail of Cheap Flights to New Haven. Still, when you make the reservation after this month, it might be possible you cannot have the flight to New Haven, CT, because of the festival time. To confirm this, you can also contact customer support, who will provide you with authenticated knowledge about the cheap flight.