AirHint found the following cheapest return flights from Houston (HOU) to Lisbon (LIS) in August 2026 (see full year).

Return flights

10 Aug - 18 Aug	Air France
11 Aug - 18 Aug	Air France
09 Aug - 17 Aug	Air Canada
10 Aug - 17 Aug	Lufthansa
05 Aug - 12 Aug	Air Canada
05 Aug - 13 Aug	Air Canada
04 Aug - 11 Aug	Air Canada
04 Aug - 12 Aug	Air Canada
03 Aug - 10 Aug	Air Canada
06 Aug - 13 Aug	Air Canada

Also check the deals for one-way flights from Houston to Lisbon in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Houston to Lisbon in August from 544€

Return flights