We've scanned every flight from Doncaster to New York to find the best deals. If you want a cheap flight, it's best to be as flexible as you can on dates. If that day's no good for you, try searching by month to see some alternative dates.
New York Newark Liberty International Airport is just one of the airports in New York. If you're not set on a specific airport, try changing your search from New York Newark Liberty International Airport to New York to see a broader range of flights – they might be cheaper.
If you're planning on going to New York during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.