There are zero airlines offering flights to Washington DC. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly.
Washington DC Ronald Reagan Washington National Airport is just one of the airports in Washington DC. If you're not set on a specific airport, try changing your search from Washington DC Ronald Reagan Washington National Airport to Washington DC to see a broader range of flights – they might be cheaper.
If you're planning on going to Washington DC during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.
