American Airlines, Finnair, and British Airways have round-trip flights from Dallas (DFW) to Helsinki (HEL) for $445-$463 with a connection. Flights in September, November, April, and May. 7-day minimum stay required.
Note: Carry-on bag is allowed for free on American Airlines, Finnair, and British Airways. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.