There are zero airlines offering flights to Moscow. 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.
Moscow Vnukovo Airport is just one of the airports in Moscow. If you're not set on a specific airport, try changing your search from Moscow Vnukovo Airport to Moscow to see a broader range of flights – they might be cheaper.
If you're planning on going to Moscow during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.