Cheapest return flights from Houston to Lisbon in December from 470€

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

Return flights

09 Dec - 14 Dec Air France
06 Dec - 08 Dec Frontier Airlines
09 Dec - 05 Jan Spirit Airlines
08 Dec - 03 Jan Frontier Airlines
18 Dec - 31 Dec Frontier Airlines
11 Dec - 03 Jan Spirit Airlines
19 Dec - 28 Dec Frontier Airlines
25 Dec - 26 Dec KLM
19 Dec - 26 Dec Frontier Airlines
23 Dec - 02 Jan Spirit Airlines
28 Dec - 03 Jan Frontier Airlines
27 Dec - 03 Jan Spirit Airlines
20 Dec - 03 Jan Frontier Airlines

Also check the deals for one-way flights from Houston to Lisbon in December.

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