At which airport are airplanes most likely to fly holding before landing? In our data, London Heathrow and London City are clear "winners" in this regard. But the data available to us is rather limited, see our About page. The following table shows some of the data we extracted. For the major airports covered in our dataset, we give:

1. the number of landings we have seen at this airport from 02. to 30. September 2015,
2. the percentage of flights that flew holding before landing there, and
3. the average time a plane spent in holding when flying to that airport.

Airport	Landings seen	% landings with holding	avg. seconds in holding
Frankfurt Main	18423	0.6	2.9
Madrid Barajas	12122	4.0	18.4
London Heathrow	12034	29.0	162.9
Amsterdam Schiphol	11432	1.3	5.8
London Gatwick	10760	2.8	12.2
Zurich	9744	11.2	58.7
Paris Charles De Gaulle	4960	0.0	0.0
Nuernberg Nurnberg	4913	0.1	0.5
Hierro	4858	2.3	12.2
London Stansted	4401	1.4	4.2
Liege	4382	0.0	0.1
Charleroi Brussels South	4353	0.0	0.0
Dortmund	4064	0.0	0.0
London City	4051	30.0	165.4
Nice Cote D\\'Azur	3980	0.5	2.1
London Luton	3760	4.3	20.8
Nottingham East Midlands	3680	0.4	1.3
Cologne Koln Bonn	2990	0.1	0.5
Birmingham	2948	3.9	8.5
Geneva Geneve Cointrin	2841	0.8	3.7
Innsbruck	2815	0.0	0.0
Manchester	2735	0.4	1.3
Rome Fiumicino	2570	0.1	0.1
Milano Malpensa	2452	0.1	0.2
Duesseldorf Dusseldorf	2444	0.0	0.0
Stuttgart	2352	0.3	1.4
Paderborn Lippstadt	2241	0.0	0.0
EuroAirport Basel-Mulhouse-Freiburg	2218	0.7	3.6
Athens Eleftherios Venizelos Intl	2130	0.0	0.4
Hannover	1908	0.0	0.0
Brussels Natl	1810	0.0	0.0
Bergamo Orio Al Serio	1792	0.1	0.0
Leeds Bradford	1712	0.4	1.8
Erfurt	1600	0.0	0.0
Lille Lesquin	1493	0.0	0.0
Memmingen Allgau	1492	0.0	0.0
Maastricht	1490	0.0	0.0
Bristol	1401	0.9	3.5
Luxemburg Luxembourg	1364	0.0	0.0
Liverpool	1339	0.0	0.0
Torino	1282	0.0	0.0
Southend	1119	0.4	2.2
Venice Venezia Tessera	1105	0.1	0.0
Pisa	1102	0.1	0.7
Olbia Costa Smeralda	1078	0.0	0.0
Villafranca	953	0.0	0.0
Zagreb	934	0.9	3.0
Salzburg	915	0.0	0.0
Eindhoven	905	0.0	0.0
Frankfurt Hahn	879	0.2	0.3
Rotterdam	844	0.2	1.0
Florence Firenze	780	0.0	0.0
Paris Orly	760	0.0	0.0
Ajaccio Campo Dell Oro	744	1.9	8.8
Milan Linate	723	0.0	0.0
Kalamata	699	0.0	0.0
Menorca	630	0.0	0.0
Cardiff	629	0.3	3.5
Alghero	628	0.0	0.0
Weeze Niederrhein	616	0.0	0.0
Hyeres Le Palyvestre	594	0.2	0.3
Zadar	594	0.0	0.0
Graz	582	0.0	0.0
Norwich	561	0.0	0.0
Bastia Poretta	526	0.6	2.4
Humberside	524	0.0	0.0
Doncaster, Sheffield Robin Hood Doncaster Sheffield Airport	518	0.0	0.0
Linz	485	0.0	0.0
Beauvais Tille	482	0.0	0.0
Bremen Neuenland	468	0.2	1.5
Ljubljana	467	0.4	1.0
Pula	439	0.2	3.5
Perugia	430	0.0	0.0
Karlsruhe/Baden-Baden Baden Airpark	421	0.2	1.6
Strasbourg Entzheim	411	0.2	1.0
Exeter	411	0.0	0.0
Munster Osnabruck	404	0.0	0.0
Klagenfurt Woerthersee International Airport	373	0.0	0.0
Skiathos Alexandros Papadiamantis	372	0.0	0.0
Bern Belp	310	17.7	32.3
Cuneo Levaldigi	303	0.0	0.0

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