The reason was due to

[angliholic]

The reason of my early return was due to my being tired, but not the rain.



Does the above sample sound right to you? If not, how would you word it? Thanks.

[Anglika]

My early return was due to my being tired, not to the rain.

The reason for my early return was my tiredness, not the rain.

If you say "due", you do not need "The reason for".

[angliholic]

My early return was due to my being tired, not to the rain.

The reason for my early return was my tiredness, not the rain.

If you say "due", you do not need "The reason for".

Thanks, Anglika, for the reply.
It seems that due and the reason for overlap in meaning, namely, one is enough and two is redundant, right?

[Anglika]

Right!