TripStow
🇬🇧 London, United Kingdom

London Heathrow Airport (LHR)

London Heathrow Airport (LHR, EGLL) serves London, United Kingdom. Flights leaving LHR left an average of 12.4 min late in the twelve months to July 2026, the 19th least delayed of 88 busy European airports.

Delays at LHR

Average departure delay per flight: 12.4 min over the twelve months to July 2026. Delays were worst in September (17.3 min) and lightest in April (8.0 min).

Average departure delay per flight from LHR, all causes, by month. Green is the least delayed month, orange the most.
See the figures
MonthAverage departure delayDepartures
August 202512.8 min20,828
September 202517.3 min20,138
October 202512.3 min20,657
November 202510.0 min19,423
December 202513.8 min20,000
January 202613.1 min19,283
February 20268.8 min17,719
March 20269.5 min19,372
April 20268.0 min19,296
May 202613.4 min20,263
June 202615.2 min19,662
July 202614.2 min20,557

Air traffic flow restrictions held 3.3% of arrivals at LHR for more than 15 minutes in the twelve months to August 2026, most often because of weather (82% of those delay minutes).

Departure delay counts every cause, from the airline to air traffic control, and is measured against the scheduled time. Source: EUROCONTROL Aviation Intelligence Portal, summarised by TripStow. EUROCONTROL does not endorse TripStow.

Busiest routes from LHR

  1. Dublin (DUB)1,903,141 passengers
  2. Madrid (MAD)1,550,044 passengers
  3. Amsterdam Airport Schiphol (AMS)1,460,366 passengers
  4. Frankfurt am Main (FRA)1,410,787 passengers
  5. Munich (MUC)1,304,262 passengers
  6. Paris (CDG)1,121,802 passengers
  7. Lisbon (LIS)1,121,519 passengers
  8. Barcelona (BCN)981,945 passengers
  9. Copenhagen Kastrup (CPH)926,274 passengers
  10. Athens (ATH)918,788 passengers

Passengers in 2024, both directions together. Source: Eurostat (CC BY 4.0), summarised by TripStow.

Questions and answers

How delayed are flights at London (LHR)?
Flights leaving LHR left an average of 12.4 min late in the twelve months to July 2026, the 19th least delayed of 88 busy European airports.
Which month has the most delays at LHR?
September 2025, when flights left an average of 17.3 minutes late; the lightest month was April 2026 (8.0 minutes).
Why are flights delayed at LHR?
EUROCONTROL records why air traffic flow restrictions delay arrivals. At LHR in the last year the biggest cause was weather (82% of those minutes), then airport capacity (7%).

Flying from LHR soon?

Forward your booking and TripStow builds your trip, reminds you when check-in opens and shows how your flight usually runs. Free.

Start free