There are several airlines that offer flights from Washington DC to Miami. Some of the popular airlines are American Airlines, United Airlines, Delta Air Lines, and JetBlue Airways.

To find flights and compare prices, you can visit online travel agencies such as Expedia, Kayak, or Orbitz, or go directly to the airlines' websites. Some airlines also offer direct flights from Washington DC to Miami, while others may have layovers in other cities.

The duration of the flight from Washington DC to Miami is typically around 2 to 3 hours, depending on the airline and the route taken. Prices for flights can vary depending on the time of year, demand, and how far in advance you book your ticket.