A round airport would let more flights take off in a smaller space, but the technology is nowhere near ready to make it work.
Building a second Sydney airport will be a demanding engineering project. But the real challenge will be one of governance needed to choreograph the mix of old and new city that will surround it.
Those backing Heathrow's proposed new runway want to depoliticise the issue entirely. But hard choices are inevitable.
We asked five design experts – what's your favorite product of all time, and why?
Airport operators enjoy the privileged position in Australian planning law of being able to decide their own futures. Their exemption from state planning rules threatens orderly planning and safety.
Airports Company of South Africa, a majority state owned enterprise, is set to be hit by a regulatory own-goal that puts further pressure on the country's credit rating.
Air crash investigators will be piecing together the events leading up to the crash of a charter aircraft in Essendon this week.
Heathrow's bid for a third runway is not over yet. Political wrangling, environmental concerns, planning and financing must all be overcome.
That Australia has not suffered a successful terrorist attack on its aviation industry is testament to the resilience of our security system.
It's not just European travel that will be affected, but transatlantic flights too.
Pro-infrastructure and pro-enterprise, the newly-elected mayor has the policies to keep London a global financial centre.
The deadly terror attack in Brussels raises the issue of safety and security at airports. But this is more about our approach to risk in any areas where people are known to gather.
The focus has for a long time been on protecting aircraft. We've just been reminded how vulnerable pre-check-in areas can be.
An expert in aviation security explains why this was a target for terrorists.
State governments are now seeking to maximise the price of privatised assets by adding sale terms that restrict competition for the future private owners. That amounts to a hidden tax on consumers.
As fierce debate rages over where to build London's next runway, we may well be missing a trick.
The key consideration for a new airport is ultimately market demand – what do customers want. And airport customers (airlines) want a Heathrow hub.
When reports surface that a drugs syndicate might control an airport's baggage handlers, it's time to look at the pressure points for what is a precarious job – and a serious security threat.
With air travel no longer possessing the romantic allure it once did, the structure is slated to become a hotel.
Once we've voted them in, politicians might just have the guts to make a decision on new flights capacity. But it is likely they will still dodge the decision we really need.