Flight time: Dublin to London

Route details

Distance breakdown: Dublin to London

The 450-km great-circle distance between Dublin (53.42°N, 6.27°W) and London (51.47°N, 0.45°W) spans 2.0° of latitude and 5.8° of longitude, trending primarily east. In miles, this is 280 mi or 243 nautical miles. The great-circle path — the shortest distance over Earth's curved surface — is calculated using the Haversine formula from the two airports' precise coordinates.

Cruise speed and flight phases

Short-haul flights like Dublin to London (450 km) spend a proportionally larger amount of time climbing to and descending from cruise altitude. Aircraft typically reach an effective cruise speed of 650–750 km/h, lower than on long-haul routes where most time is spent at optimal altitude. The climb phase alone takes 15–20 minutes, during which the aircraft covers only about 150–200 km. Combined with descent and approach, the effective average speed drops significantly from the theoretical cruise speed, yielding the 1h 06m to 1h 32m estimate for this route.

Ground time and routing overhead

Our 30–50 minutes overhead allowance covers: taxi-out at DUB, takeoff and initial climb, descent and approach at LHR, and taxi-in to the gate. Taxi times at DUB are typically 5–15 minutes depending on traffic. At LHR, arrival taxi and gate assignment can add 10–20 minutes, especially during busy arrival banks. Continental air traffic corridors between Dublin and London may add 3–8% beyond the great-circle distance. Standard instrument departures and arrivals at both airports use predefined routing that adds distance but ensures safe separation.

Return flight: London → Dublin

The return flight from London to Dublin is generally similar in duration to the outbound — typically within 10–20 minutes. Continental routes like this one are less affected by the jet stream asymmetry that makes oceanic east-west routes so uneven. The main variables affecting any difference are: prevailing winds at these latitudes (modest effect), different standard instrument departures/arrivals at each airport (minor effect), and air traffic congestion patterns that vary by time of day and direction.

Seasonal variation in flight times

On this short 450-km route, seasonal flight time variation is minimal — typically under 10 minutes. The main seasonal factor is not wind (which has less effect on short flights) but weather-related delays: winter fog, de-icing procedures, and thunderstorm diversions in summer can extend actual gate-to-gate times. DUB and LHR each have their own seasonal delay patterns that affect overall travel time more than en-route conditions.

Airport information

Dublin Airport (DUB) serves Dublin, Ireland as a significant international airport. Flight frequency is good on major routes, with moderate taxi times. Heathrow Airport (LHR) is a major international hub in London, United Kingdom. As a tier-1 airport, it handles high traffic volumes, which means longer average taxi times but also higher flight frequency and competition that can benefit travelers on pricing.

Flight times from Dublin to other destinations

Flight time FAQ: Dublin to London