AirHint found the following cheapest return flights from San Diego (SAN) to Hanoi (HAN) in January 2026 (see full year).
Return flights
| 29 Jan - 05 Feb | ANA | ||
| 15 Jan - 29 Jan | ANA | ||
| 28 Jan - 18 Feb | ANA | ||
| 31 Jan - 07 Feb | Delta | ||
| 11 Jan - 18 Jan | Frontier Airlines |
Also check the deals for one-way flights from San Diego to Hanoi in January.
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