San Franicsco to Hanoi or Ho Chi Minh City Vietnam $507-$512 RT Airfares on China Southern (Travel Feb-March 2019)

China Southern Airlines, a certified Skytrax rated 4 out of 5 stars airline have round trip airfares travelling from San Francisco (SFO) to Hanoi (HAN) for $512 or to Ho Chi Minh City (SGN) for $507, making 1 stop. China Eastern has this for $470, also with one stop.
Travel Availability
Departs SFO to HAN: Feb 25; March 1, 3, 6, 8, 10, 11, 13, 15, 17
Returns: March 4, 8, 10, 13, 15, 17, 18, 20, 22, 24
Departs SFO to SGN: Feb 5, 25, 26, 28; March 1-3, 5-17, 19, 21, 23
Returns: Feb 12-14, 16, 19, 21, 26, 28; March 2, 4-5, 7-10, 12-24, 26, 28, 30
Enter travel dates on Expedia and select your fares to book this deal. Bundling hotel with airfare will save money and Expedia can also sell you attraction and sightseeing tour tickets in their "things to do" section.
HT: Scotts Cheap Flights
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http://www.expedia.com/