The US Department of Transportation has yet to announce online a decision on Air China’s application to add extra flights to support this week’s US-China high-level visit as of late Monday, Hong Kong time, after a trade association backed by the largest US airlines protested the bid. The trade group Airlines for America, which represents major US airlines, filed an objection to Air China’sbid for additional Beijing-New York and Beijing-Washington flights for September 19 and 25, saying it was...