Heathrow (LHR) departure delays

Name: Heathrow (LHR) departure delays
Creator: FlightLabs

Of 34,404 sampled departures, 86.1% left 15 minutes or more behind schedule. Average lateness was 35.4 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, 84.2% late.

Airlines with the most late departures

Airline	Flights sampled	Late	Average lateness
SriLankan (UL)	74	100.0%	44.6 min
PIA (PK)	40	100.0%	46.7 min
EL AL (LY)	97	99.0%	57.8 min
Alaska Airlines (AS)	66	98.5%	44.2 min
Japan Airlines (JL)	96	97.9%	35.7 min

Routes from LHR

LHR to JFK — 141 flights per week
LHR to DUB — 109 flights per week
LHR to AMS — 103 flights per week
LHR to CDG — 90 flights per week
LHR to FRA — 89 flights per week
LHR to MUC — 86 flights per week
LHR to GVA — 79 flights per week
LHR to ZRH — 76 flights per week

The departures that are late right now

86.1% 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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