When flying from San Salvador to State of Oaxaca, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Due to multiple factors, expect to potentially pay more when booking in January. For low rates, May can be a great choice for travel to State of Oaxaca. Flights to State of Oaxaca from San Salvador in May are about $378 on average during May, but can be found for as low as $280.