Da Nang to SaiGon - Flight or Train ?

Your Q is Da Nang - Sai Gon, but your post is Nha Trang - Sai Gon. Btw, flight Da Nang - Sai Gon takes one hour, train would take approx 14-15 hours. As for Nha Trang - Sai Gon there is a fast train (private company) along with government train.

Ooops, I meant Nha Trang to Sai Gon.

Thanks Hong Ha, so do you think the sceneries between Nha Trang - Saigon are worth it to go via train or should I fly instead to save time?

See www.seat61.com/Vietnam.htm</a> for train times and info.

Flying will take 4-5 hours including check-ins and getting to and from airports. Train is an experience, cheaper, less hassle. Are you really in such a rush it makes a difference whether it's 7 hours or 4 hours? Is this supposed to be a holiday?!

If on a tight schedule, fly. Simple as that.

If there's an overnight train try that, it'll save you a night paying for accomodation when you'd be sleeping anyway. Good laugh as well.
Jumper

A lot of the scenery south of Nha Trang is less than spectacular, so you're not missing anything amazing by not taking the train - it gets good to the north of Nha Trang. If time is short, fly.

Note that if you fly Nha Trang - Sai Gon, the airport is Cam Ranh, about 40km from Nha Trang.

Air Vietnam has a connecting bus from Nha Trang to the airport for 30,000DN. Get details when you book your flight.

I'd take the train or catch a bus.