Originally Posted by
Alinsfca
Thanks for the cash reminder. I am arriving SGN at 6 am in the morning. I was worried about the Grab and taxi situation so early, so I arranged for a hotel pickup at the airport. But I will definitely use Grab when in town.
If you are coming in from another country when using Grab, it might not let you book with a credit card immediately. I flew in from BKK to Hanoi (where I used Grab) and it did not let my payment via credit card go through when I ordered a Grab to get to the Old Quarter. It did let me go through with a cash fare. The next day, Grab worked just fine when I ordered a ride, so this might be something to keep in mind.
As for the airport, I didn't have Grab set up in Bangkok, but I used Grab with no hiccups at HAN, SGN and DPS.