The best time of year to find cheap flights from atl to lax is typically during the off-peak travel seasons, which are late January to early March and September to early November. During these periods, demand is lower, and airlines often offer discounts to fill seats. Booking flights in advance, especially around 1-3 months before your departure, can also help secure better prices. Avoiding holidays, school breaks, and major events in either city will give you a higher chance of finding cheaper fares.