Before that happens, though, volunteers had to test it out to see how user friendly the new travel hub is.
Around 400 people attended a 'dress rehearsal' day at the airport, near Schönefeld airport at the end of July. Originally, 20,000 people were supposed to attend the test day but this had to be scaled back because of the coronavirus crisis.
The Local spoke with Liverpool-born Glen Pearson, a photographer based in Berlin, to find out what it was like.
Glen Pearson at the airport. Photo courtesy of Glen Pearson
The Local: How did you get involved with the volunteer BER visit and why did you want to do it?
Glen Pearson: I saw that BER were looking for volunteers in the RBB Abendschau (regional broadcaster) twitter feed, so I applied for a slot. I'd already done a tour of BER last year; I love doing things like this – always up for a mini-adventure.
TL: What kind of things did you have to do on the day? Did you have to wear any special clothes?
Then we checked in and did all the usual tasks like going to the gate and showing our passport, then we got onto a bus instead of a plane.
Then we were driven around to arrivals, and went through passport control, and then to the carousels to 'collect bags' where we picked bags ready for our next 'departure'.
TL: What was it like? Were there any highlights/strange things about the day?
GP: They gave us a packed lunch and it was truly the “wurst” sandwich I'd ever had in my life. It was terrible. Lousy coffee and all that.
TL: Did you notice anything particularly interesting about the new airport and the building?
TL: How does it feel to be one of the first people to try out Berlin's very long-awaited new airport?
GP: I do feel like I've got an insight into this most notorious of airports before the average Berliner has, but what will the average Berliner think when they use it for the first time in November? They'll just shrug their shoulders and get on with it.
GP: For those arriving by car, I strongly recommend stuffing your face at the Burger King next to the Tankstelle (petrol station) as you pull off the motorway and onto the BER slip road. You'll see it on your right hand side as you drive towards the airport.
Why has the airport taken so long to open?
Berlin's new airport was due to open in 2011 but delays and scandals put it on hold for almost a decade.
Its building costs have reportedly more than tripled from the roughly €2 billion initially budgeted to more than €7 billion to date.
Meanwhile, in 2016, a former manager was jailed for accepting a bribe.
The notorious delays led Berlin's then mayor Klaus Wolverweit to step down in 2015.
The new airport is located in Schönefeld in the state of Brandenburg. October 31st is Reformation Day and a public holiday in this state.