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

Return flights

19 Aug - 27 Aug	United
19 Aug - 04 Sep	Air Canada
20 Aug - 05 Sep	Air Canada
18 Aug - 03 Sep	Delta
17 Aug - 02 Sep	Delta
18 Aug - 25 Aug	United
12 Aug - 26 Aug	United
23 Aug - 03 Sep	United
24 Aug - 09 Sep	Air Canada
25 Aug - 10 Sep	Air Canada
26 Aug - 11 Sep	Air Canada
31 Aug - 16 Sep	Air Canada
26 Aug - 01 Sep	United
12 Aug - 28 Aug	Delta
17 Aug - 21 Aug	Iberia
09 Aug - 25 Aug	Air Canada
04 Aug - 20 Aug	Delta
10 Aug - 26 Aug	Delta
24 Aug - 31 Aug	United
11 Aug - 27 Aug	Delta

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 534€

Return flights