United is currently offering non-stop flights from Washington DC (IAD), Newark, and Chicago (ORD) to Europe as low as $442! Some of the non-stop destinations include Paris, Brussels, Amsterdam, London, and Dublin.
It seems like these flights are available for flights departing between September 15 through December 15, 2016 and then again January 15 through March 15, 2017 – but let me know if you find even more availability!
If you find a cheap flight, you can always book now and think about it for the next 24 hours or so. If you book through Priceline, for example, you have until 11:29pm EST tomorrow to cancel for a FULL refund.
Thanks to The Flight Deal for finding this deal!