Original Analysis · Last 30 Days

Airport Reliability Rankings

We poll live NOTAM and flight-board data every 15 minutes and log every disruption we see. This ranks airports by how much disrupted time they have actually racked up over the last 30 days - not estimates, our own measured history.

Most Delayed UK Airports

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EUROPE

Most Delayed European Airports

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Most Delayed US Airports

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AIRPORTS AFFECTED

825

TOTAL EVENTS

2703h 2m

DISRUPTED TIME

LPL

WORST AIRPORT

#	Airport	Events	Disrupted Time	Leading Cause
1	LPLLiverpool John LennonUnited Kingdom	26	620h 12m	ATC Restriction
2	BOSBoston LoganUnited States	32	343h 24m	runway construction
3	SANSan Diego InternationalUnited States	34	287h 50m	airport volume
4	SFOSan Francisco InternationalUnited States	25	175h 35m	low ceilings
5	LHRLondon HeathrowUnited Kingdom	116	136h 24m	Departure Delays
6	ORDChicago O'HareUnited States	34	114h 11m	thunderstorms
7	LGWLondon GatwickUnited Kingdom	115	112h 13m	Departure Delays
8	LTNLondon LutonUnited Kingdom	4	91h 24m	ATC Restriction
9	SEASeattle-TacomaUnited States	55	84h 5m	RWY:Construction
10	LASLas Vegas Harry ReidUnited States	38	80h 44m	WX:Wind
11	DFWDallas/Fort WorthUnited States	29	61h 55m	WX:Thunderstorms
12	JFKNew York JFKUnited States	19	59h 30m	WX:Wind
13	PHLPhiladelphia InternationalUnited States	18	58h 11m	TM Initiatives:SWAP:WX
14	AUSAustin-BergstromUnited States	17	53h 59m	runway construction
15	DENDenver InternationalUnited States	18	53h 55m	runway construction
16	EWRNewark LibertyUnited States	23	48h 35m	TM Initiatives:SWAP:WX
17	MIAMiami InternationalUnited States	38	47h 35m	TM Initiatives:MIT:WX
18	PHXPhoenix Sky HarborUnited States	24	45h 26m	VOL:Multi-taxi
19	DCARonald Reagan WashingtonUnited States	21	39h 14m	TM Initiatives:ESP:VOL
20	MCOOrlando InternationalUnited States	20	32h 15m	TM Initiatives:MIT:WX
21	NCLNewcastle AirportUnited Kingdom	1	15h	ATC Restriction
22	BWIBaltimore/WashingtonUnited States	8	14h 40m	WX:Thunderstorms
23	LBALeeds Bradford AirportUnited Kingdom	4	12h 45m	ATC Restriction
24	ATLAtlanta Hartsfield-JacksonUnited States	8	11h 46m	WX:Low Visibility
25	MANManchester AirportUnited Kingdom	18	10h 56m	Widespread Elevated Delays
26	TPATampa InternationalUnited States	3	10h 34m	WX:Thunderstorms
27	IADWashington DullesUnited States	6	9h 56m	WX:Thunderstorms
28	IAHHouston George BushUnited States	6	9h 30m	WX:Thunderstorms
29	MDWChicago MidwayUnited States	3	8h 4m	thunderstorms
30	MSPMinneapolis-Saint PaulUnited States	2	7h 10m	wind

Methodology

"Disrupted time" is the sum of every minute an airport spent at AMBER or RED severity across all logged events in the window, measured from when we first detected the disruption to when it cleared (or now, if still ongoing). Data comes from our own NOTAM polling (NATS, FAA, Aviation Weather Center) plus live flight-board monitoring for major UK/EU hubs. This page shows the last 30 days; the underlying history is kept permanently - see the full event archive for individual incidents.