By/ on flight

[alimomen]

Which one sounds natural?and why?

1- I came by the 8.30 a.m flight

2- I came on the 8.30 a.m flight

3- I came by 8.30 a.m flight

4- I came on 8.30 a.m flight

Thanks

 

[Uncle Jack]

(1) and (2) are both fine. You need "the" because it is a specific flight.

 

[You little ripper!]

I prefer Number 2 ('on the').

 

[lingobingo]

2- is the only version I would expect anyone to use.

 

[london calling]

2- is the only version I would expect anyone to use.

Same here.

 

[You little ripper!]

2- is the only version I would expect anyone to use.

It's the only one I would use too; 'prefer' was the wrong choice of word.