AirHint found the following cheapest return flights from Houston (IAH) to San Salvador (SAL) in December 2026 (see full year).
Return flights
| 18 Dec - 29 Dec | United | direct | |
| 17 Dec - 30 Dec | United | direct | |
| 11 Dec - 02 Jan | United | direct | |
| 26 Dec - 04 Jan | United | direct | |
| 19 Dec - 09 Jan | United | direct | |
| 17 Dec - 02 Jan | Avianca | direct |
Also check the deals for one-way flights from Houston to San Salvador in December.
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