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Heathrow (LHR) departure delays

Name: Heathrow (LHR) departure delays
Creator: FlightLabs

Of 33,898 sampled departures, 86.0% left 15 minutes or more behind schedule. Average lateness was 35.1 minutes. Sample window: Nov 5, 2025 to Oct 16, 2026.

These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.

When departures are on time

Best hour to depart: 23:00–23:59, 3.5% late.
Best day of week: Wednesday, 84.4% late.

Airlines with the most late departures

Airline	Flights sampled	Late	Average lateness
SriLankan (UL)	74	100.0%	44.3 min
PIA (PK)	40	100.0%	46.7 min
EL AL (LY)	98	99.0%	57.3 min
Alaska Airlines (AS)	65	98.5%	44.9 min
Japan Airlines (JL)	96	97.9%	35.8 min

Routes from LHR

LHR to JFK — 142 flights per week
LHR to DUB — 109 flights per week
LHR to AMS — 103 flights per week
LHR to CDG — 89 flights per week
LHR to FRA — 89 flights per week
LHR to MUC — 88 flights per week
LHR to GVA — 80 flights per week
LHR to ZRH — 76 flights per week

The departures that are late right now

86.0% of this LHR sample left 15 minutes late or more. GET /flight_delays returns the ones that are late at this moment: airline, flight number, scheduled time, actual time and minutes of delay.

https://www.goflightlabs.com/flight_delays?access_key=YOUR_ACCESS_KEY&delay=15&type=departures&dep_iata=LHR

Example response

Field names match the live API. This flight only shows the shape. It is not a live result.

{ "success": true, "data": [ { "airline_iata": "AA", "flight_iata": "AA100", "flight_number": "100", "dep_iata": "LHR", "dep_time": "2024-03-15 08:00", "dep_actual": "2024-03-15 08:22", "dep_delayed": 22, "status": "active" } ] }

That URL still says YOUR_ACCESS_KEY. A 7-day trial replaces it with a real key and returns the LHR departures that are late right now, in the JSON above. After the trial, Starter is $24.99/mo.

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