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

Return flights

21 Aug - 03 Sep	Air Canada
19 Aug - 27 Aug	Finnair
19 Aug - 04 Sep	Air Canada
20 Aug - 05 Sep	Air Canada
20 Aug - 27 Aug	United
21 Aug - 06 Sep	Air Canada
21 Aug - 04 Sep	Finnair
21 Aug - 29 Aug	Finnair
17 Aug - 02 Sep	Air Canada
18 Aug - 24 Aug	British Airways
13 Aug - 21 Aug	Finnair
13 Aug - 19 Aug	Finnair
31 Aug - 08 Sep	Frontier Airlines
14 Aug - 20 Aug	Finnair
13 Aug - 22 Aug	United
05 Aug - 21 Aug	Delta
10 Aug - 26 Aug	Delta
18 Aug - 01 Sep	Air France
28 Aug - 02 Sep	Finnair
31 Aug - 17 Sep	Finnair

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Dallas-Fort Worth to Lisbon in August from 481€

Return flights