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

755

TOTAL EVENTS

2568h 22m

DISRUPTED TIME

SAN

WORST AIRPORT

#	Airport	Events	Disrupted Time	Leading Cause
1	SANSan Diego InternationalUnited States	30	243h 32m	airport volume
2	BOSBoston LoganUnited States	29	228h 21m	runway construction
3	SFOSan Francisco InternationalUnited States	59	211h 29m	RWY:Construction
4	MIAMiami InternationalUnited States	34	165h 41m	TM Initiatives:MIT:WX
5	JFKNew York JFKUnited States	36	123h 2m	TM Initiatives:SWAP:WX
6	ORDChicago O'HareUnited States	27	121h 25m	thunderstorms
7	LTNLondon LutonUnited Kingdom	5	119h 56m	ATC Restriction
8	LGWLondon GatwickUnited Kingdom	36	113h 26m	Elevated Delays
9	EWRNewark LibertyUnited States	34	113h 1m	TM Initiatives:SWAP:WX
10	LHRLondon HeathrowUnited Kingdom	31	103h 14m	Departure Delays
11	NCLNewcastle AirportUnited Kingdom	7	100h 1m	ATC Restriction
12	PHLPhiladelphia InternationalUnited States	27	97h 21m	TM Initiatives:SWAP:WX
13	MCOOrlando InternationalUnited States	39	84h 53m	TM Initiatives:MIT:WX
14	BOHBournemouth AirportUnited Kingdom	8	82h 27m	ATC Restriction
15	LASLas Vegas Harry ReidUnited States	46	65h 41m	WX:Wind
16	SEASeattle-TacomaUnited States	51	63h 46m	VOL:Compacted Demand
17	EMAEast Midlands AirportUnited Kingdom	3	58h 30m	ATC Restriction
18	DCARonald Reagan WashingtonUnited States	17	53h 5m	thunderstorms
19	DENDenver InternationalUnited States	19	45h 34m	thunderstorms
20	BWIBaltimore/WashingtonUnited States	17	40h 15m	WX:Thunderstorms
21	EXTExeter AirportUnited Kingdom	11	38h 12m	ATC Restriction
22	ATLAtlanta Hartsfield-JacksonUnited States	10	34h	WX:Thunderstorms
23	IADWashington DullesUnited States	15	33h 16m	thunderstorms
24	TPATampa InternationalUnited States	15	29h 35m	TM Initiatives:MIT:WX
25	PHXPhoenix Sky HarborUnited States	24	27h 45m	VOL:Multi-taxi
26	DFWDallas/Fort WorthUnited States	13	26h 39m	WX:Thunderstorms
27	IAHHouston George BushUnited States	13	21h 55m	WX:Thunderstorms
28	DTWDetroit MetropolitanUnited States	9	20h 35m	thunderstorms
29	AUSAustin-BergstromUnited States	6	16h 35m	runway construction
30	MDWChicago MidwayUnited States	5	14h 11m	WX:Thunderstorms

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.