AirHint found the following cheapest one-way flights from Las Vegas (LAS) to San Diego (SAN) in December 2025 (see full year).
One-Way flights
| 05 Dec | Frontier Airlines | direct | |
| 11 Dec | Frontier Airlines | direct | |
| 08 Dec | Frontier Airlines | direct | |
| 06 Dec | Alaska Airlines | direct | |
| 26 Dec | Alaska Airlines | direct | |
| 01 Dec | Delta | direct | |
| 31 Dec | Delta | direct |
Also check the deals for return flights from Las Vegas to San Diego 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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