オーストラリアへ行きましたその空港はブリスベン空港です。って英語でなんて言うの？

If you want to explain to someone that you went to Australia and then arrived at Brisbane Airport, you can simply say:
"I went to Australia and arrived at Brisbane Airport."

You went to Australia and arrived at Brisbane Airport. You can explain this by trying one of the above example comments.

"I arrived at Brisbane airport, Australia"
This sentence is stating that you had arrived/landed at Brisbane, a city in Australia.
usually when talking about entering a new city or country via an airplane we use 'arrive' or 'land'.
"I went to Australia and arrived at Brisbane Airport"
A simple and causal of putting this together in a sentence.
To go is also 'I went' in past tense.

"Flew Into" is a phrasal verb used to describe which airport you arrived at when you went to some destination. It's a common expression and used by most native speakers.

When organising someone to meet me I might say to them, "I'm flying into Brisbane at 9pm, can you meet me?

When we talk about where we arrive when flying, we use the phrasal verb "fly into."Using the phrase "when I went to" makes it clear that you are talking about a previous trip. I hope that this helps! :)

1.I flew into Brisbane Airport on a recent trip to Australia.
To fly into a place means to arrive there.This indicates
that Brisbane was your first stop.

2. On arrival in Australia, my plane touched down in Brisbane.
   On or upon arrival in Australia, your plane "touched down"
   which means it landed/came in to land or arrived in Brisbane.

Any of these sentences are suitable to tell someone that you went to Australiaand arrived at Brisbane Airport.

1. I traveled to Austrailia and landed in Brisbane Airport

2. Brisbane airport was the first place I landed when I traveled to Australia.

These are different ways to say that you landed in Brisbane Airport, when you went to Australia. Below are ways it could be used in a sentence.

After our long flight to Australia, we ended up landing in Brisbane Airport.

We arrived in Australia at the Brisbane Airport.

Our flight was long, I was glad when we finally got to the Brisbane Airport.

First port of call: means your first point of contact. When I arrived in Australia, my first point of contact was Brisbane Airport.
Reached my destination:Arriving at a place to which one is journeying

Your example is a good one, although, another good word to use in this context is "landed". For example: I arrived later than I expected to JFK, at 9 p.m instead of 6 p.m.We landed very easily which is rare for me.

If you would like to tell someone that you landed in Brisbane airport when you went to Australia, you can say something like "When I went to Australia I landed in Brisbane Airport." or "I landed in Brisbane airport when I went to Australia.".