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

Return flights

28 Oct - 04 Nov	Delta
15 Oct - 22 Oct	Delta
01 Oct - 08 Oct	Delta
16 Oct - 23 Oct	Delta
26 Oct - 02 Nov	Air France
25 Oct - 01 Nov	KLM
06 Oct - 13 Oct	Delta
04 Oct - 11 Oct	Delta
16 Oct - 25 Oct	Delta
03 Oct - 07 Oct	KLM
03 Oct - 06 Oct	KLM

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 494€

Return flights