Bom dia, TAP Air Portugal! TAP Air Portugal is once again serving San Francisco with nonstop service to Lisbon (LIS). TAP currently offers two flights per week: Flights from SFO depart to LIS on Thursdays and Sundays at 4:10 p.m. Flights from LIS arrive at SFO on Thursdays and Sundays at 2:35 p.m.