AirHint found the following cheapest return flights from Indianapolis (IND) to San Salvador (SAL) in December 2025 (see full year).
Return flights
| 19 Dec - 16 Jan | Allegiant Air | ||
| 25 Dec - 02 Jan | Spirit Airlines | ||
| 17 Dec - 04 Jan | Spirit Airlines | ||
| 12 Dec - 03 Jan | Spirit Airlines | ||
| 19 Dec - 04 Jan | Allegiant Air |
Also check the deals for one-way flights from Indianapolis to San Salvador in December.
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