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Cheap flights from London Heathrow Airport to Dublin from $100

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Dublin are usually found in January or October, booked 56 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from Heathrow to Dublin

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Dublin
Explore the most affordable flight options available from Heathrow to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2026.

Mon 27/706:20
LHR
-
DUB
Nonstop1h 25m
British Airways
Wed 29/720:30
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 17/4$156
Tue 14/706:20
LHR
-
DUB
Nonstop1h 25m
British Airways
Tue 21/720:25
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 16/4$157
Sat 25/706:15
LHR
-
DUB
Nonstop1h 25m
British Airways
Tue 28/720:25
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 17/4$159
Fri 29/506:20
LHR
-
DUB
Nonstop1h 25m
British Airways
Tue 2/620:25
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 16/4$160
Fri 10/716:30
LHR
-
DUB
Nonstop1h 25m
British Airways
Wed 15/720:30
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 16/4$162
Mon 14/906:20
LHR
-
DUB
Nonstop1h 25m
British Airways
Mon 14/920:30
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 13/4$163
Sun 20/906:20
LHR
-
DUB
Nonstop1h 25m
British Airways
Mon 21/920:30
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 17/4$164
Sun 14/606:20
LHR
-
DUB
Nonstop1h 25m
British Airways
Tue 16/620:25
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 13/4$166
Tue 2/618:10
LHR
-
DUB
Nonstop1h 25m
British Airways
Tue 9/608:35
DUB
-
LHR
Nonstop1h 35m
British Airways
Deal found 18/4$169
Tue 1/1206:30
LHR
-
DUB
Nonstop1h 25m
British Airways
Fri 4/1220:35
DUB
-
LHR
Nonstop1h 20m
British Airways
Deal found 13/4$170
Fri 3/706:20
LHR
-
DUB
Nonstop1h 25m
British Airways
Mon 13/720:30
DUB
-
LHR
Nonstop1h 15m
British Airways
Deal found 16/4$171

Find flight deals from Heathrow to Dublin

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Dublin (DUB). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 April 2026.

Round-trip from

$156

One-way from

$100

Popular in

June

Cheapest in

January

Average price

$268

Good round-trip deal

$212 or less

Good one-way deal

$155 or less
British Airways
  • British Airways
  • 27/7-29/7
  • Nonstop
  • 2h 40m total
  • London to Dublin
Search Deals
British Airways
  • British Airways
  • 29/5
  • Nonstop
  • 1h 25m total
  • London to Dublin
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($31 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Dublin.
Search Deals
Price to beat on a one-way flight from London Heathrow to Dublin.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Dublin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 18 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Dublin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 22/7

06:15-07:40

Nonstop1h 25m

Dublin

Sat 25/7

20:15-21:30

Nonstop1h 15m

$164

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 27/8

18:05-19:30

Nonstop1h 25m

Dublin

Mon 31/8

20:30-21:45

Nonstop1h 15m

$164

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Tue 25/8

06:20-07:45

Nonstop1h 25m

Dublin

Thu 27/8

13:45-15:15

Nonstop1h 30m

$166

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 11/6

06:20-07:45

Nonstop1h 25m

Dublin

Sat 13/6

20:15-21:30

Nonstop1h 15m

$167

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Mon 1/6

06:20-07:45

Nonstop1h 25m

Dublin

Mon 8/6

20:30-21:45

Nonstop1h 15m

$176

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 28/5

06:20-07:45

Nonstop1h 25m

Dublin

Thu 4/6

20:20-21:35

Nonstop1h 15m

$178

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 5/8

06:15-07:40

Nonstop1h 25m

Dublin

Thu 6/8

18:50-20:05

Nonstop1h 15m

$181

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Mon 25/5

06:20-07:45

Nonstop1h 25m

Dublin

Tue 26/5

08:35-10:10

Nonstop1h 35m

$181

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 20/5

06:15-07:40

Nonstop1h 25m

Dublin

Wed 20/5

19:45-21:00

Nonstop1h 15m

$196

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Fri 1/5

06:20-07:45

Nonstop1h 25m

Dublin

Sat 2/5

18:45-20:00

Nonstop1h 15m

$198

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Heathrow to Dublin

Have a flexible travel schedule? Discover the best time to fly to Dublin from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Dublin

How far ahead should I book a flight from London Heathrow Airport to Dublin?

Use this chart to determine the optimal time to book a return flight from Heathrow to Dublin. Price data was last updated on 10 April 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Dublin, you should look to book at least 56 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to Dublin?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Dublin (average of $198). Flying from London Heathrow Airport to Dublin in June is currently the most expensive (average of $287). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to DUB?

Find hourly flight availability from Heathrow to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 April 2026.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Dublin at midday. If you’re flexible enough to do this you can expect to save up to 48% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from London Heathrow Airport to Dublin?

Use this chart to determine the cheapest time to fly return from Heathrow to Dublin. Price data was last updated on 11 April 2026.

Travellers seeking maximum savings on their London Heathrow Airport to Dublin flight should consider departing on Thursday at midday when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost for a return flight from London Heathrow Airport to Dublin?

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dublin. Reviews last updated 18 April 2026.
See what other customers who have flown with Aer Lingus and British Airways from London Heathrow Airport to Dublin have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,512 reviews
Check prices

Crew

8.1

Boarding

7.4

Entertainment

7.0

Food

6.6

Overall

7.3

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.
Aer Lingus
7.3
Good
1,512 reviews
Aer Lingus
7.3
Good
1,512 reviews
Check prices

Crew

8.1

Boarding

7.4

Entertainment

7.0

Food

6.6

Overall

7.3

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.
British Airways
6.7
Okay
7,892 reviews
Aer Lingus
7.3
Good
1,512 reviews
Check prices

Crew

8.1

Boarding

7.4

Entertainment

7.0

Food

6.6

Overall

7.3

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Dublin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Dublin from London Heathrow?

    Most people fly into Dublin (DUB) if they book a flight to Dublin from London Heathrow. On average, Dublin has 59 inbound flights from London Heathrow per day from 2 airlines. Dublin is conveniently located just 9.2 km from Dublin’s city centre.

  • How long is the flight from London Heathrow Airport to Dublin?

    For as low as $164, British Airways can have you in Dublin from London Heathrow Airport in 1h 25m. London Heathrow Airport and Dublin are separated by a distance of 449 km. Most flights are nonstop.

  • What are the cheapest airlines flying from London Heathrow Airport to Dublin round-trip?

    Currently priced at $129, British Airways will fly you from London Heathrow Airport to Dublin and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Aer Lingus for as low as $196. Users have found that British Airways is 47% cheaper than the other options available to this destination.

  • What are the most reliable airlines from London Heathrow Airport to Dublin?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to Dublin on time: Air Canada (88%), Japan Airlines (86%), Kenya Airways (86%).

  • What are the cheapest flights from London Heathrow Airport to Dublin?

    Looking for the cheapest flight from London Heathrow Airport to Dublin? While on average our users pay $228, our data indicates the cheapest price to be $92. The most popular route (London Heathrow - Dublin), is priced around $171.

  • Can I find deals for flights from Heathrow to Dublin that include hotel bookings?

    Yes. In addition to deals on Heathrow to Dublin flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Dublin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Dublin.

  • Can I find deals for business class flights from Heathrow to Dublin?

    Yes. Cheapflights offers flight deals from Heathrow to Dublin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Dublin?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Dublin (average of $198). Flying from London Heathrow Airport to Dublin in June is currently the most expensive (average of $287). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Dublin?

Book flights to Dublin if you plan to visit one of these locations
Cavan

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to Dublin

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Dublin flights

Top 2 airlines flying from Heathrow to Dublin

Discover the top 2 airlines that operate flights from Heathrow to Dublin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 18 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$129Average$205FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest$196Average$279FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Dublin?

Cheapflights makes it easy to find Heathrow to Dublin flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Dublin?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dublin from Heathrow.

Can Cheapflights find flights from Heathrow to Dublin with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Dublin, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Dublin become cheaper?

Yes! Start tracking prices for Heathrow to Dublin flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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