Yes, there are multiple flights from Hong Kong International to Mobile for under HK$7,771. The cheapest flight booked recently is on United Airlines for just HK$7,724, but on average you can expect to pay HK$37,135.
There are no direct flights from Hong Kong International to Mobile, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
When travelling, we recommend packing in preparation to handle common weather conditions. The rainfall in Hong Kong International is typically less than Mobile. We can gather that this will continue over the next 15 days.
You can imagine temperatures to be in the 33 °C range in July. The weather in Mobile is generally hotter than Hong Kong International's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.
United Airlines and American Airlines can get you from Hong Kong International to Mobile in just under 23h 12m. Your travel time can differ by up to 1h 58m. Both multi-stop and direct flights can be found to your destination and back.
Flying on United Airlines is currently your cheapest option to Mobile, with prices starting at HK$7,724. Another option worth looking into is American Airlines, starting at HK$37,789 return.