Alternative sector

[PRD2021]

Darren was supposed to travel tomorrow, but unfortunately, Silk Air has cancelled all flights from XYD sector for the next three months.
Silk Air has offered him an alternative sector or refund of $170. He opted an alternative sector ASD-DLH-KLF, and the boarding airport is 175Km far from his hometown.
However, he is travelling from ASD day after tomorrow and reaching here by Friday at 3.00 hrs.

Are the above sentences grammatically correct and natural?

 

[SoothingDave]

I don't know what you mean by "sector." You have some typos, too.

 

[PRD2021]

I don't know what you mean by "sector." You have some typos, too.

It is air line sector like CDG - LHR (flights from Paris Charles de Gaulle to London Heathrow).
I mentioned the dummy sector names, not actual ones. I have fixed the typos.
Please advise me if they are worded correctly?

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[emsr2d2]

Darren was supposed to travel tomorrow no comma here but, unfortunately, no comma here Silk Air has cancelled all flights from XYD sector for the next three months.
Silk Air has offered him an alternative sector flight/route or a refund of $170. He opted for an alternative sector route - ASD-DLH-KLF. and The boarding departure airport is 175km far from his hometown.
However, He is travelling from ASD the day after tomorrow and reaching will arrive here by 3am/3pm Friday. at 3.00 hrs.

Are the above sentences grammatically correct and natural?

See my corrections above.