What does 差額 mean?
差額 is a Japanese noun meaning “balance, difference, margin” in English. It is written as 差額 in kanji, さがく in hiragana, and sagaku in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
遅延便については、オリジナルの出発日に基づくシーズナリティを適用するため、マイル差額の払い戻しはいたしません。
For delayed flights, seasonal adjustments are made on the basis of the original flight date and so refunds of air-mile difference will not be made.