Singapore Airlines via DealBase offers select Singapore Airlines Roundtrip Flights to Asia and Europe with prices starting from $498.58. (On the DealBase landing page, click on "singaporeair.com" in the top line to see this offer; we found this price departing from Los Angeles, CA, (LAX) on December 4 with arrival in Tokyo, Japan (NRT) and return on December 11.) That's the lowest price we could find for select routes on a 5-star airline by at least $132. Book this travel deal by December 31 for travel through March 31, 2018.

All prices, dates, and booking details were valid at the time of publication.