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

Return flights

30 Dec - 31 Jan	United	direct
02 Dec - 09 Dec	United	direct
09 Dec - 16 Dec	Viva
12 Dec - 17 Dec	Viva
06 Dec - 26 Dec	United	direct
09 Dec - 16 Dec	United	direct
11 Dec - 21 Dec	Viva
14 Dec - 28 Dec	Aeromexico
30 Dec - 13 Jan	United	direct
23 Dec - 29 Dec	Volaris
27 Dec - 31 Dec	Volaris
11 Dec - 20 Dec	United	direct
29 Dec - 03 Jan	United	direct
10 Dec - 04 Jan	Viva
23 Dec - 07 Jan	Aeromexico
25 Dec - 05 Jan	Aeromexico
23 Dec - 07 Jan	United	direct
25 Dec - 05 Jan	United	direct
10 Dec - 04 Jan	United	direct
24 Dec - 03 Jan	United	direct

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

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 Houston to San Salvador in December from 271€

Return flights