Delta, Virgin Atlantic, American Airlines, British Airways and various other airlines have round-trip flights from Houston (IAH) to London, United Kingdom (LHR) for $598-$631 with a connection. Flights in May, August, September, October, November, December, January, February, and March. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required. Holiday blackouts.
A Carry-on bag and also a personal item is allowed for free. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.