New update....
One agent said an extension is not possible. I am awaiting a reply from another agent. I am not optimistic.
Oceanbeach92107 mentioned a border run to Cambodia. The last time I was in Saigon I met a couple expats who talked about border runs. This sounds like an "easier" solution for me rather than flying to Cambodia. A 30 day tourist visa at the border would solve my problem.
I have already booked a flight to Saigon from Hanoi Wednesday at noon. I have a 7 day abnb booked for 7 days in central Saigon. If a border run to Cambodia is a valid option for me I could keep the abnb and spend an entire day for the border run.
I understand that border runs can be done by car, taxi, van or bus. Probably a van would be best. Or grab car if that is possible. If I use a van can anyone recommend a good van service? I am assuming that I would need to leave early in the morning with a return likely very late afternoon.
I did read a lengthy description of the process at the border. Does not sound too complicated....hopefully I say!
I welcome any suggestions that will minimize the hassles. I have already experienced enough hassles.
You BMs have been very helpful. Michael
-@mjtcgc
It's clear (yet understandable) that you don't yet fully comprehend the limitations of your options.
As I previously pointed out, in order to do that same day border run (5 to 6 hours max turnaround on the HCMC/Mộc Bài route) you'll need--as Aidan pointed out--to already be in possession of a valid Evisa for reentry to Vietnam.
You've almost certainly waited too long to apply for an Evisa through one of the trustworthy visa agents who can sometimes get your visa approved while you are still here in Vietnam.
Most visa agents are simply refusing to do that, while a scant few are able to get it done with advanced notice; usually at least 1 month in advance.
It's not exactly cheap either.
The closer you are to your visa expiration date, the more it will cost in additional agents' fees.
It's great insurance to apply for a 90 day visa, even though you only need a couple of extra weeks.
In case of emergency you won't be under pressure to exit the country immediately.
IT MIGHT BE YOUR BEST OPTION to work with an agent who is prepared to do an urgent application for a new visa (4 hours or less) as soon as you cross the border into Cambodia and your passport electronically clears the immigration system.
The agent would be standing by to submit your application as soon as you are out of the country.
Here in Đà Nẵng, the main local agent is usually getting people cleared in that manner by noon, when they cross the border at Lao Bảo into Cambodia by 8 AM.
If you can find someone trustworthy in HCMC to do that for you, go for it.
Otherwise I REPEAT, if you cross into Cambodia without an approved Evisa for re-entry into Vietnam, you'll need at least 3 business days (weekends & holidays excluded) to get a new application approved, but likely 4 days.
Good luck with whatever choice you make.
O.B.