Air Canada, Lufthansa, KLM, British Airways and various other airlines have round-trip flights from Austin (AUS) to Lisbon (LIS) for $580-$636 with a connection. Flights February, March, October, November, and December. Departures on Monday, Tuesday, Wednesday, Thursday, and Sunday. No Fridays or Saturdays. 7-day minimum stay required. No Christmas dates available.
Click for more details and booking links Cheap Flights: Austin to Lisbon $580-$636 r/t [Feb-Mar, Oct-Dec] (No Christmas) – Air Canada / Lufthansa / KLM / British Airways