I went to London by plane last year. or I flied to London last year

[Thillaiganesh]

Which one is correct?
I went to London by plane last year

or

I flied to London last year

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What is the meaning of Kill Joy

[Mister Micawber]

.
'Went by plane' or 'flew'.
.
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Native English teacher at Mister Micawber's