Do I need an Irish visa if I have a UK visa and want to bring my wife from Bangkok to Belfast via Dublin?

I once flew from NYC to Newcastle via Dublin. Absolutely no passport check anywhere. Extraordinary! It was 4am on arrival in Dublin.

I think what you are trying to achieve is to enter Ireland and travel to Northern Ireland by land. To do that you need a visa for your friend that will allow them to enter the EU so 2 visas would be required. The only way to circumvent this is either to fly directly to Northern Ireland or via another airport where you don't exit immigration (unless it's a UK airport)

Thai friend did this trip a couple of months ago, flight booked to Dublin but UK visa. She was denied boarding & had to rebook via heathrow which was both costly & time consuming.

Okay buddy, I am going to have to do you a favor and tell you to stop and just think about what you are doing. I am American and was forced to visit relatives in Dungannon and WOW was the experience. Bad food, bad weather, and it was the worst English I have ever heard. It was like Mel Gibson in Braveheart but 10 times worst. So please do not ruin her fantasy that you come from a beautiful place with majestic castles and lovely posh English. You are going to ruin her imagination of the West. Do not bring a Thai girl to those shitty islands. Just my thoughts.

My daughter in law came over to Cork but as she stopped in London first for a few days the visa covered her for the Republic

Since to go through Dublin you would need to travel through UK and rely on the short stay visa waiver to get you through Dublin it would be far simpler to fly into Belfast through either Manchester or Heathrow I would have thought. Through Heathrow she could fly into there direct on Thai Air then on to Belfast maybe on a budget flight. But it's your choice at the end of the day.

Yes, as Adam Silverfox said, you have to stop in the UK first to be able to go to Dublin, then you have to fly/drive back to the UK before returning to Thailand. We did it last year. Flew to London, then on to Dublin, same on the way back 👍

My guess would be that if she is not physically entering Dublin, ie going through passport control, then no visa should be needed as she is on transit and not entering the company. However I transit through JFK to work and have to physically enter the country. Grey area. Contact the appropriate authorities rather than take advice off FB.

U need to miss ireland out .. get the UK visa and transfer thru london … UK visa is no good in dublin unless travelling from UK on the short stay waiver program

I would say you need 2 visas. Possible route single visa Bangkok-Dubai-Newcastle-Belfast

Fly to London with a connecting flight to Belfast

You want to bring your wife but you dont want to pay the price!

If she leaves the airport she requires a ROI visa yes. They wouldn't even let you board the plane in bkk without it

From the dfa.ie website.

Unless you qualify for the Short Stay Visa Waiver Programme or the British Irish Visa Scheme a valid UK visa does not entitle you to travel to Ireland without a visa. Further information on these schemes is available on the website of the Irish Immigration Service.