When is the best time to book a flight to Washington DC for March?

The best time to book a flight to Washington, DC for March is typically around 1 to 3 months in advance, which means booking between December and January. Prices tend to be lower during this period as airlines often release deals and discounts. Additionally, consider flying mid-week for better rates, as weekends usually see higher demand and prices. Lastly, keep an eye on events in the city, as major attractions or festivals can affect flight costs.