Dublin (DUB) to London Heathrow (LHR) — Route Guide 2026

Updated June 2026

Dublin to London Heathrow flights — airlines, terminals & live fares

Dublin (DUB) to London Heathrow (LHR) is one of the busiest short-haul routes in Europe. Aer Lingus and British Airways both operate multiple direct daily services, with a flight time of approximately 1 hour 20 minutes. Use the live search below to compare current fares by departure time and airline, then check the terminal and baggage guide before booking.

Direct flights only Both Aer Lingus and British Airways operate multiple direct daily services. No connections needed on this route.
~1 hr 20 min flight time Total flying time is approximately 1 hour 20 minutes. Schedule and departure time are typically more important than fare alone on this route.
Cheapest: midweek & off-peak Midweek Tuesday–Thursday departures are typically cheaper. Avoid Monday mornings, Friday evenings, and bank holiday weekends for the best fares.

Dublin to London Heathrow route guide 2026

Dublin to London Heathrow is one of the highest-frequency short-haul routes in Europe. Aer Lingus and British Airways both operate multiple daily direct services, with departures throughout the day from early morning to early evening. Flight time is approximately 1 hour 20 minutes. The choice between carriers typically comes down to schedule fit, loyalty programme preference, and fare type — both offer similar journey times.

Heathrow is a major connection hub. If your reason for flying DUB to LHR is to catch an onward long-haul connection, confirm your connecting terminal before booking. Aer Lingus arrives at Terminal 2; British Airways operates from Terminal 5. Terminal changes at Heathrow require additional transfer time, so allow at least 90 minutes for any onward connection.

Baggage allowance varies significantly by fare class on both carriers. Aer Lingus's basic 'Saver' fare and BA's 'Basic' fare both typically include cabin baggage only — checked luggage incurs an additional fee. If you plan to check a bag, compare the all-in cost (fare plus baggage) rather than just the headline ticket price.

Fare levels on this route are closely tied to business travel demand. Midweek departures (Tuesday to Thursday) are typically the most affordable. Avoid Monday mornings and Friday evenings, which see peak business traffic and higher prices. Bank holiday periods and school holidays also generate significant leisure demand and higher fares.

Airline and booking tips

Useful official resources

Frequently Asked Questions

Are Dublin to London Heathrow flights direct?

Yes. Both Aer Lingus and British Airways operate multiple direct daily services from Dublin Airport (DUB) to Heathrow (LHR). No connections are required on this route.

Which airlines fly Dublin to London Heathrow?

Aer Lingus and British Airways are the two main carriers on the DUB to LHR route, both operating multiple daily direct flights. Aer Lingus arrives at Terminal 2; British Airways uses Terminal 5.

Which terminal at Heathrow for Dublin flights?

Aer Lingus flights from Dublin arrive at Terminal 2 at London Heathrow. British Airways Dublin flights arrive and depart from Terminal 5. Confirm your terminal before any onward connections.

How long is the flight from Dublin to Heathrow?

The direct flight time from Dublin (DUB) to London Heathrow (LHR) is approximately 1 hour 20 minutes. Add check-in, boarding, and transfer time at either end for total journey planning.

When is the cheapest time to fly Dublin to Heathrow?

Midweek departures (Tuesday to Thursday) are typically the most affordable. Avoid Monday mornings, Friday evenings, and bank holiday weekends, which see peak business and leisure demand. January, February, and November outside school holidays tend to offer the lowest fares on this route.

How do I get from Heathrow to central London?

Heathrow is well connected to central London. The Elizabeth line (Crossrail) runs to Paddington in around 30 minutes. The Heathrow Express (premium) reaches Paddington in 15 minutes. The Piccadilly line is the most affordable option at around 50 minutes to central London.

Should I check baggage allowance before booking DUB to LHR?

Yes. Basic fares on both Aer Lingus and British Airways typically include cabin baggage only. A checked bag adds to the total cost. Compare the all-in price — including any baggage fees — rather than the headline fare alone.

Do I need a passport to fly from Dublin to London Heathrow?

Under the Common Travel Area (CTA), Irish and British citizens are not subject to routine immigration control when travelling between Ireland and the UK. However, your airline (Aer Lingus or British Airways) will check your travel document at check-in and boarding. Both Aer Lingus and British Airways accept an Irish passport or a valid national identity card. Non-Irish and non-British citizens should check entry requirements for the UK before travel.

Can I use DUB to LHR as a connecting flight to catch a long-haul service at Heathrow?

Yes, but plan carefully. If both flights are on a single booking (e.g., all on Aer Lingus or both on BA), you are protected by the airline if the Dublin leg is delayed. If the DUB-LHR and the connecting long-haul are on separate bookings, you have no protection if you miss the connection. Allow at least 90 minutes at Heathrow, and note that a terminal change (T2 to T5 or vice versa) requires a shuttle bus and additional security in some cases.

Is the Heathrow Express worth the extra cost over the Elizabeth line?

It depends on your priorities. The Heathrow Express (15 minutes to Paddington, ~£25 each way) is the fastest option and worth it if time is critical. The Elizabeth line (30 minutes to Paddington, ~£11 each way) is significantly cheaper and serves more central London stations including Tottenham Court Road, Liverpool Street, and Canary Wharf. For most travellers, the Elizabeth line offers the best combination of speed, convenience, and value.