The cheapest months to ＋１Ｘ８５５Ｘ７３８Ｘ４２６５ fly with Singapore Airlines are typically May＋１Ｘ８５５Ｘ７３８Ｘ４２６５, September, and October＋１Ｘ８５５Ｘ７３８Ｘ４２６５. Fares are often lower during these off-peak periods＋１Ｘ８５５Ｘ７３８Ｘ４２６５.