AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to Lisbon (LIS) in August 2025 (see full year).

Return flights

11 Aug - 27 Aug	Air Canada
21 Aug - 27 Aug	Air Canada
12 Aug - 28 Aug	Air Canada
17 Aug - 24 Aug	American Airlines
05 Aug - 21 Aug	American Airlines
04 Aug - 20 Aug	Delta
17 Aug - 02 Sep	Delta
10 Aug - 26 Aug	Air Canada
21 Aug - 29 Aug	Finnair
13 Aug - 18 Aug	Iberia
15 Aug - 24 Aug	Iberia
25 Aug - 10 Sep	Air Canada
26 Aug - 11 Sep	Air Canada
23 Aug - 03 Sep	United
24 Aug - 09 Sep	Air Canada
27 Aug - 12 Sep	Air Canada
31 Aug - 16 Sep	Air Canada
23 Aug - 08 Sep	Air Canada
30 Aug - 15 Sep	Air Canada
23 Aug - 02 Sep	KLM

Also check the deals for one-way flights from Dallas-Fort Worth 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 Dallas-Fort Worth to Lisbon in August from $597

Return flights