AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to Lisbon (LIS) in September 2026 (see full year).

Return flights

22 Sep - 08 Oct	Delta
21 Sep - 07 Oct	Delta
28 Sep - 14 Oct	Delta
20 Sep - 06 Oct	Air Canada
29 Sep - 15 Oct	Air Canada
30 Sep - 16 Oct	Air Canada
23 Sep - 09 Oct	Air Canada
27 Sep - 13 Oct	Air Canada
16 Sep - 02 Oct	Air Canada
19 Sep - 05 Oct	Air Canada
01 Sep - 30 Sep	Finnair
01 Sep - 09 Sep	Air Canada
02 Sep - 18 Sep	Air Canada
01 Sep - 17 Sep	Air Canada
06 Sep - 22 Sep	Air Canada
07 Sep - 23 Sep	Air Canada
08 Sep - 24 Sep	Air Canada
09 Sep - 25 Sep	Air Canada
13 Sep - 29 Sep	Air Canada
14 Sep - 30 Sep	Air Canada

Also check the deals for one-way flights from Dallas-Fort Worth to Lisbon in September.

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 September from 469€

Return flights