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

Return flights

28 Oct - 04 Nov	Air Canada
29 Oct - 05 Nov	Air Canada
27 Oct - 03 Nov	Air France
26 Oct - 02 Nov	Delta
13 Oct - 20 Oct	Air Canada
03 Oct - 10 Oct	Spirit Airlines
14 Oct - 21 Oct	Air Canada
30 Oct - 06 Nov	Delta
31 Oct - 07 Nov	Delta
06 Oct - 13 Oct	Air Canada
23 Oct - 30 Oct	Spirit Airlines
20 Oct - 27 Oct	KLM
22 Oct - 29 Oct	KLM
21 Oct - 28 Oct	Air France
07 Oct - 14 Oct	Spirit Airlines
15 Oct - 22 Oct	Air France
11 Oct - 01 Nov	Air France
25 Oct - 01 Nov	KLM

Also check the deals for one-way flights from Houston 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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Houston to Lisbon in October from 459€

Return flights