###User: Prix moyens mensuels  ###Assistant: If you are trying to decide when to travel from suisun city to san diego by train so you can score the best possible deal, your best bet would be to plan your trip for . that’s when the average price for a train ticket is expected to be just – the lowest of the year.   
 alternatively, if you plan to travel from suisun city to san diego in , expect to spend more on your train trip, as the average ticket price usually surges to at that time of year. however, if you book your trip ahead of time, you have a high chance of scoring a ticket at a lower price.