TransCon and TransPac!
United Airlines has posted $436 fares out of New York City/Newark (EWR) to Singapore (SIN) on their service via LAX/SFO (Boeing 787 flights from LAX/SFO) or Tokyo-Narita (NRT).
Various dates (good availability) as early as tomorrow through to December 7, 2017.
Use Google Flights to search and book.
https://www.google.com/flights/#s…10-25;a=UA