AirHint found the following cheapest return flights from Dallas (DAL) to Lisbon (LIS) in October 2025 (see full year).

Return flights

14 Oct - 21 Oct	Delta
06 Oct - 22 Oct	Delta
25 Oct - 30 Oct	Delta
24 Oct - 09 Nov	Delta
02 Oct - 09 Oct	Delta
16 Oct - 20 Oct	Delta
10 Oct - 15 Oct	Delta
13 Oct - 28 Oct	KLM
06 Oct - 12 Oct	Air France
08 Oct - 14 Oct	Air France

Also check the deals for one-way flights from Dallas to Lisbon in October.

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 to Lisbon in October from $691

Return flights