The best way to make the Singapore Airlines flight cancellation would be through the official website. The specifications of the same are given here in detail for you to refer to:

Through the official website:

The most accessible mode to cancel a flight with Singapore Airlines is through their online portal. The methodology that needs to be followed for the same is as follows:

Breeze through the official website of Singapore Airlines.
Click on the Manage Booking icon provided.
Type in the details of the booking reference and last name.
The booking page would be displayed as needed.
Scroll down to find the flight for which cancellation has to be made.
Check through the menu list option to discover the Cancel My Flight link.
Make the necessary selections, make the payment, and submit.
The confirmation email will be shared accordingly.

What cost do I have to pay for flight cancellation on Singapore Airlines?

The average cost levied from you for the flight cancellation made on Singapore Airlines usually varies by determining factors. Thus, you can find a difference in the cancellation fee depending on the fare class, travel destination, and the total distance covered. It also fluctuates on the basis of the time gap between the cancellation and the flight departure date. Thus, you can get charged anywhere between 70 USD to 150 USD or more per the circumstances.

Can I get a full refund if I cancel my Singapore Airlines flight?

Yes, you could get a full refund from Singapore Airlines for the flight cancellation made if the ticket booking was made directly with the airline under the refundable fare category. Apart from the same, following the 24-hour cancellation policy with the airline, you can also cancel for free by getting a full refund.