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https://supportcommunity.milestonesys.com/s/question/0D5bH00000ZE6loSAD/18667380729-how-much-notice-to-cancel-a-singapore-airlines-flight-singaporeairlines https://supportcommunity.milestonesys.com/s/question/0D5bH00000ZE6loSAD/18667380729-how-much-notice-to-cancel-a-singapore-airlines-flight-singaporeairlines