Just yesterday, we posted flights to Hong Kong in the $500s from many U.S. cities. Today, flights from a few hub cities have dropped into the $300s roundtrip on Air Canada and a few more cities are available in the $400s on United. Fares this low do not last very long. Book now for a super cheap flight to Hong Kong.

Travel on Mondays, Tuesdays, Wednesdays, and Thursdays. Some itineraries may have overnight layovers in a connecting city, which means you could depart on a Sunday as long as you cross the Pacific on a Monday.

The lowest fares on Air Canada are easiest to find in the fall from late September through mid-December, but you'll find a few scattered spring dates available departing in April/May, with returns available through June. United flights are available as early as next week.

These won't last! Book now! You'll have 24 hours to think about your plans with a risk-free cancellation policy.

Chicago to Hong Kong $358 roundtrip

Houston to Hong Kong $358 roundtrip

Newark to Hong Kong $358 roundtrip

Baltimore to Hong Kong $468 roundtrip

For more deals, check out our full list of today's finds to Hong Kong (HKG).