The Suriname one confused me. I know it borders French Guyana but all the other answers seem to be the actual country's borders, not overseas territories.
I thought the country itself had to have the same starting letter as well before I realised that wasn't the case. - Got them all with 1:18 to spare and I was guessing quite a lot, maybe shave off a minute or even 2? (And you'll get complaints there isn't enough time).