Politics aside, the 2 airports in Belfast question has been a long standing debate. As someone who has worked in both Belfast airports from an operations angle, I wanted to give my 2 cents.
First of all, both Belfast airports are private companies, and in some markets they both compete directly with each other. Now from a consumer point of view this is good. The customer can make choices that suit them, like flight times, departure location, and the competition involving low fares and who can attract the most passengers. All this is good for the economy too.
Belfast Aldergrove is a great airport that has hit hard times over the last decade. For example pre-recession, in the summer time there were upto 6 flights to Canada a week, multiple charters to the Caribbean, Mexico, Florida etc. Also a healthy European leisure market with XL, Spanair, Air Dubrovnik, to name a few. Sadly these services were lost, APD went up, and as a result less people decided to travel, those who did sometimes driving down to Dublin instead. What also did not help is that the former owners of
BFS had a knack for not trying to turn the situation around, look at Cardiff for example.. Now there are new owners who have gone out there, rolled their sleeves up, and are bringing in new (and old) airlines again.
Belfast City airport is popular for people visiting the Belfast area itself, aswell as those in North Down. In the domestic and European markets, this is the airport that brings the lucrative business types to Northern Ireland,
BA, for example have many corperate deals and agreements in place, as do Aer Lingus, plus a healthy steady cargo demand. It should also be noted that
BHD does get a lot of feedback from people who do travel from the other side of
NI, or from across the border, due to it's location beside the city, convenient size, transport links and it's wide variety of regional destinations on offer.
I noted that Frostyj mentioned that
BHD is very small, with small planes..it is worth noting that
LDY/Eglinton airport is only a few hundred or so feet longer in runway length, and with a much smaller terminal building.
LDY has unfortunately had the hardest of times over the years, going from a time when for example there was an extensive Loganair presence, to just Ryanair and the occasional charter. I understand it is the only airport that is council subsidised too. For anyone who lives in the North West I have no doubt it is a great asset to have on the doorstep, and I hope it can attract more business in the future.
At the end of the day airlines will go to wherever the best markets are, which in
NI tends to radiate around the Belfast area. Both airports do cater for slightly different markets, and the best thing to do is let them continue to expand in their own way.
If it ever comes down to closing one of the airports it would most likely be
BHD, but not without possible loss of airline services, loss of revenue to the local economy, and many job losses. For example, it was always rumoured Aer Lingus jumped ship at
BFS for a better deal down the road. If
BHD closed,
BFS has the monopoly, can charge whatever it wants as a result, and airlines will be less keen to fly here.
For the time being, Northern Ireland will always struggle to attract some of the big names to it's airports. It is one of the most sparsely populated regions in the UK, with APD to deal with, and with easy road access to an airport down South with more choices and typically cheaper fares. If we can attract new industries in, they will be the likes of Turkish, KLM, and other European airlines with narrowbodies and regional wings, maybe even Westjet!. I would not hold out for an Emirates A380 anytime soon!