United has flights from Dallas (DFW) to Buffalo, New York (BUF) for $110 with a connection. $55 each-way. Flights February to December. No Holidays. Origin/Destination reversible.
Note: Saturday departures with Tuesday returns are available from May no November.
Note: Carry-on bag is NOT allowed for free. You can avoid seat selection fees if you accept a randomly assigned seat at the gate. Upgrades into “Regular Economy” are available for +$25 each-way. If you have the United MileagePlus credit card you should be able to avoid bag fees with the “free checked-bag” perk.