https://www.google.com.hk/amp/s/www.cnbc.com/amp/2018/04/14/russia-us-tensions-prompts-american-air-to-reroute-some-asia-flights.html
The measure could cause delays. American Airlines, which operates more than 6,000 flights a day, said three flights separate flights were affected:
Dallas to Hong Kong, Dallas to Beijing, and Chicago to Beijing, according to the document.
Three were sent instead
through Los Angeles. Because of range limits on planes, pilots often cannot simply take a longer route without additional fuel. Crews may also "time out," meaning the daily hours their union contract says they can work may run out if the routing is changed.
玩到DFW要經LAX先飛到HKG
日日都兜大全圈