Kuala Lumpur to Singapore. Terrible. It delays all the time as normal LCCs do. They tend to being a little better than the other LCC but it has nothing different. No one apologize for the inconvenience caused by the flight. I don't know why I should take this LCC though I purchase ticket from Singapore Airline all the time. There is significant difference between the two brand and it causes obvious minus for the customers paid premium. Please don't use the poor option because of cheap cost.
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