Hainan Airlines via DealBase discounts select roundtrip flights to China, with prices starting from $375.47. That's the best price we could find for select routes on comparable 5-star carriers by $402. (For further comparison, you'd pay at least $39 more to fly on a 4-star carrier.) Book this travel deal by September 30 for travel through the same date. Buy Now Tips On the DealBase landing page, click on "Hainan Air" in the top line to see this sale. On Hainan's sale page, you may have to click "Search Flights" under "Plan & Book" in the top banner to search for flights. We found this price on flights departing on September 3 from Los Angeles, CA (LAX) to Shanghai, China (PVG), with return on September 10. All prices, dates, and booking details were valid at the time of publication.