Fly nonstop from New York to Lisbon for $680 round-trip on United.
Seen below, we found seats departing EWR on Thursday, May 19, returning from LIS on Friday, May 27.
You'll find slightly higher fares (+$10) available for departures again in late June.
See our Newark EWR fare listings for a complete look at current finds.
Need a room in Lisbon? Here's what's available for the above dates on Hotelwatchdog.