A long-haul flight is one that covers a very long distance — usually many hours, often between continents. Taipei to New York or London is long-haul; Taipei to Tokyo or Hong Kong is not (that is short-haul, or a shorter regional flight).

A long-haul flight long-haul flight is one that covers a very long distance指的是航程非常長的班機——usually many hours, often between continents通常要飛好幾個小時，常常是跨洲的。Taipei to New York or London台北飛紐約或倫敦 is long-haul算long-haul；Taipei to Tokyo or Hong Kong台北飛東京或香港 is not不算（that is short-haul, or a shorter regional flight那叫short-haul，比較短程的區域航班）

Airlines, airports, and travel ads use this pair all the time: long-haul / short-haul. You also hear it about trucks and cargo that travel far.

Airlines, airports, and travel ads航空公司、機場、旅遊廣告 use this pair all the time一天到晚都在用這組詞：long-haul / short-haul。You also hear it about trucks and cargo that travel far卡車和長途貨運也會用這個字

Here haul means the length of the trip, not “pulling a bag.” There is another English phrase, in the long haul, meaning “over a long period of years,” but that is a different use; this sense is about distance.

Here這裡 haul means the length of the trip haul指的是路程的長度，not "pulling a bag."不是「拖行李」的意思。There is another English phrase, in the long haul另外還有一個片語in the long haul，meaning "over a long period of years,"意思是「長期而言」，but that is a different use不過那是不同的用法；this sense is about distance這裡這個意思是講距離

In speech it is everyday in travel talk, not fancy.

In speech在口語裡 it它 is everyday in travel talk是旅遊話題裡很平常的字，not fancy不是什麼高級用語