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

813

TOTAL EVENTS

2657h 17m

DISRUPTED TIME

BOS

WORST AIRPORT

#	Airport	Events	Disrupted Time	Leading Cause
1	BOSBoston LoganUnited States	31	238h 4m	runway construction
2	SANSan Diego InternationalUnited States	29	227h 5m	airport volume
3	SFOSan Francisco InternationalUnited States	56	208h 17m	RWY:Construction
4	LTNLondon LutonUnited Kingdom	8	187h 8m	ATC Restriction
5	MIAMiami InternationalUnited States	34	164h 25m	TM Initiatives:MIT:WX
6	ORDChicago O'HareUnited States	33	143h 28m	thunderstorms
7	LGWLondon GatwickUnited Kingdom	57	132h 53m	Departure Delays
8	LHRLondon HeathrowUnited Kingdom	49	122h 13m	Departure Delays
9	NCLNewcastle AirportUnited Kingdom	7	105h 45m	ATC Restriction
10	JFKNew York JFKUnited States	34	105h 2m	thunderstorms
11	EWRNewark LibertyUnited States	33	104h 1m	TM Initiatives:SWAP:WX
12	PHLPhiladelphia InternationalUnited States	24	85h 51m	TM Initiatives:SWAP:WX
13	BOHBournemouth AirportUnited Kingdom	7	81h 32m	ATC Staffing
14	MCOOrlando InternationalUnited States	40	78h 22m	TM Initiatives:MIT:WX
15	LASLas Vegas Harry ReidUnited States	45	68h	WX:Wind
16	SEASeattle-TacomaUnited States	54	64h 54m	VOL:Compacted Demand
17	DENDenver InternationalUnited States	23	58h 40m	thunderstorms
18	EMAEast Midlands AirportUnited Kingdom	3	58h 30m	ATC Restriction
19	DCARonald Reagan WashingtonUnited States	16	44h 45m	thunderstorms
20	EXTExeter AirportUnited Kingdom	11	38h 12m	ATC Restriction
21	BWIBaltimore/WashingtonUnited States	15	34h 10m	WX:Thunderstorms
22	ATLAtlanta Hartsfield-JacksonUnited States	10	32h 35m	WX:Thunderstorms
23	IADWashington DullesUnited States	14	30h 41m	thunderstorms
24	TPATampa InternationalUnited States	15	29h 34m	TM Initiatives:MIT:WX
25	PHXPhoenix Sky HarborUnited States	25	28h 15m	VOL:Multi-taxi
26	DFWDallas/Fort WorthUnited States	13	25h 28m	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	6	16h 15m	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.