AirHint found the following cheapest one-way flights from Houston (HOU) to Singapore (SIN) in December 2025 (see full year).
One-Way flights
| 02 Dec | IndiGo | ||
| 03 Dec | United | ||
| 29 Dec | IndiGo | ||
| 28 Dec | IndiGo | ||
| 27 Dec | IndiGo | ||
| 19 Dec | Spirit Airlines |
Also check the deals for return flights from Houston to Singapore in December.
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