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Cheap flights from Northern Ireland to London from £51

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to London departing on 22/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

British Airways Logo
19:35 - 20:55BHD-LHR
1h 20mdirect
British Airways Logo
07:45 - 09:10LHR-BHD
1h 25mdirect
£71British Airways
Find Deal
Fri, 5 Dec - Sun, 7 Dec
British Airways Logo
06:45 - 08:20BHD-LHR
1h 35mdirect
British Airways Logo
07:00 - 08:25LHR-BHD
1h 25mdirect
£72British Airways
Find Deal
Fri, 5 Dec - Mon, 8 Dec
British Airways Logo
19:00 - 20:20BHD-LHR
1h 20mdirect
British Airways Logo
11:40 - 13:05LHR-BHD
1h 25mdirect
£73British Airways
Find Deal
Sat, 18 Oct - Mon, 20 Oct
British Airways Logo
06:35 - 08:10BHD-LHR
1h 35mdirect
British Airways Logo
11:50 - 13:15LHR-BHD
1h 25mdirect
£74British Airways
Find Deal
Mon, 24 Nov - Mon, 24 Nov
British Airways Logo
06:35 - 08:10BHD-LHR
1h 35mdirect
British Airways Logo
07:45 - 09:10LHR-BHD
1h 25mdirect
£75British Airways
Find Deal
Thu, 12 Mar - Thu, 19 Mar
British Airways Logo
13:15 - 14:35BHD-LHR
1h 20mdirect
British Airways Logo
19:20 - 20:45LHR-BHD
1h 25mdirect
£76British Airways
Find Deal
Thu, 16 Oct - Tue, 21 Oct
Loganair Logo
06:30 - 08:00LDY-LHR
1h 30mdirect
Loganair Logo
20:15 - 21:40LHR-LDY
1h 25mdirect
£139Loganair
Find Deal
Fri, 31 Oct - Mon, 3 Nov
Loganair Logo
06:30 - 08:00LDY-LHR
1h 30mdirect
Loganair Logo
20:15 - 21:40LHR-LDY
1h 25mdirect
£158Loganair
Find Deal
Fri, 5 Dec - Mon, 8 Dec
Loganair Logo
18:05 - 19:35LDY-LHR
1h 30mdirect
Loganair Logo
08:45 - 10:15LHR-LDY
1h 30mdirect
£182Loganair
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Thu, 30 Oct - Thu, 6 Nov
Logo
08:00 - 16:50LDY-LHR
8h 50m2 stops
Logo
08:45 - 10:15LHR-LDY
1h 30mdirect
£211
Find Deal
Fri, 31 Oct - Mon, 3 Nov

British Airways flights from Northern Ireland to London Heathrow Airport

Our best British Airways deals on Northern Ireland to London Heathrow Airport flight tickets
British Airways
5 Dec
BHD19:35Belfast City
1h 20m
LHR20:55London Heathrow
7 Dec
LHR07:45London Heathrow
1h 25m
BHD09:10Belfast City
£71
Find similar
British Airways
5 Dec
BHD06:45Belfast City
1h 35m
LHR08:20London Heathrow
8 Dec
LHR07:00London Heathrow
1h 25m
BHD08:25Belfast City
£72
Find similar
British Airways
18 Oct
BHD19:00Belfast City
1h 20m
LHR20:20London Heathrow
20 Oct
LHR11:40London Heathrow
1h 25m
BHD13:05Belfast City
£73
Find similar

KLM flights from Northern Ireland to London Heathrow Airport

Our best KLM deals on Northern Ireland to London Heathrow Airport flight tickets
KLM
24 Sept
BHD06:30Belfast City
4h 15m
1 stop
LHR10:45London Heathrow
19 Oct
LHR11:45London Heathrow
9h 30m
1 stop
BHD21:15Belfast City
£403
Find similar
KLM
20 Sept
BHD06:30Belfast City
11h 20m
1 stop
LHR17:50London Heathrow
23 Sept
LHR11:45London Heathrow
5h 10m
1 stop
BHD16:55Belfast City
£429
Find similar
KLM
20 Sept
BHD06:30Belfast City
11h 20m
1 stop
LHR17:50London Heathrow
28 Sept
LHR06:30London Heathrow
10h 25m
1 stop
BHD16:55Belfast City
£447
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Northern Ireland to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 16 September 2025.
Use the filters below to find and compare flights from Northern Ireland to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastLondon

BHD - LHR

BHDLHR

Belfast City

Fri 5/12

19:35-20:55

Nonstop1h 20m

London Heathrow

Sun 7/12

07:45-09:10

Nonstop1h 25m

£71

BelfastLondon

BHD - LHR

BHDLHR

Belfast City

Fri 5/12

06:45-08:20

Nonstop1h 35m

London Heathrow

Mon 8/12

07:00-08:25

Nonstop1h 25m

£72

BelfastLondon

BHD - LHR

BHDLHR

Belfast City

Sat 18/10

19:00-20:20

Nonstop1h 20m

London Heathrow

Mon 20/10

11:40-13:05

Nonstop1h 25m

£73

BelfastLondon

BHD - LHR

BHDLHR

Belfast City

Mon 24/11

06:35-08:10

Nonstop1h 35m

London Heathrow

Mon 24/11

11:50-13:15

Nonstop1h 25m

£74

BelfastLondon

BHD - LHR

BHDLHR

Belfast City

Thu 12/3

06:35-08:10

Nonstop1h 35m

London Heathrow

Thu 19/3

07:45-09:10

Nonstop1h 25m

£75

BelfastLondon

BHD - LHR

BHDLHR

Belfast City

Thu 16/10

13:15-14:35

Nonstop1h 20m

London Heathrow

Tue 21/10

19:20-20:45

Nonstop1h 25m

£76

LondonderryLondon

LDY - LHR

LDYLHR

Londonderry Eglinton

Fri 31/10

06:30-08:00

Nonstop1h 30m

London Heathrow

Mon 3/11

20:15-21:40

Nonstop1h 25m

£139

LondonderryLondon

LDY - LHR

LDYLHR

Londonderry Eglinton

Fri 5/12

06:30-08:00

Nonstop1h 30m

London Heathrow

Mon 8/12

20:15-21:40

Nonstop1h 25m

£158

LondonderryLondon

LDY - LHR

LDYLHR

Londonderry Eglinton

Thu 30/10

18:05-19:35

Nonstop1h 30m

London Heathrow

Thu 6/11

08:45-10:15

Nonstop1h 30m

£182

LondonderryLondon

LDY - LHR

LDYLHR

Londonderry Eglinton

Fri 31/10

08:00-16:50

2 stops8h 50m

London Heathrow

Mon 3/11

08:45-10:15

Nonstop1h 30m

£211

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Northern Ireland to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

In general, January is the cheapest month to fly from Northern Ireland to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £88. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Northern Ireland averaging around £105.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Northern Ireland is on a Thursday. momondo users have found tickets for Thursday departures for as low as £98. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £121.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Northern Ireland to London Heathrow Airport in the evening for as low as £174. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £689 on average. Flights to London Heathrow Airport from Northern Ireland in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Northern Ireland to London Heathrow flight route?

Fly from Belfast City to London Heathrow for the best Northern Ireland - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Northern Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £120 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Northern Ireland for as low as £84 on momondo.

What cabin class options are available on Northern Ireland to London Heathrow flights?

There are 3 cabin classes available to choose from on Northern Ireland to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Northern Ireland to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Northern Ireland to London Heathrow Airport

Best price found

£95

Fastest flight time

1h 20m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Northern Ireland in the past 72 hours is £95. The best return flight deal from Northern Ireland to London Heathrow Airport found on momondo in the last 72 hours is £170.
The fastest flight from Northern Ireland to London Heathrow Airport takes 1h 20m
Direct flights go from Northern Ireland to London Heathrow Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Northern Ireland to London Heathrow Airport?

    Prices for flights from Northern Ireland to London Heathrow Airport refresh daily.

  • How many operators does momondo search for flights from Northern Ireland to London Heathrow Airport?

  • How old do you have to be to fly from Northern Ireland to London Heathrow Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Northern Ireland to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Northern Ireland to London Heathrow Airport?

Best airlines flying from Northern Ireland to London Heathrow Airport

Compare and see reviews for airlines that fly from Northern Ireland to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
easyJetPriceFrom £29Free CancellationRating
6.9
1,820 reviews
Search easyJet flights
British AirwaysPriceFrom £74Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
LoganairPriceFrom £130Free CancellationRating
8.2
19 reviews
Search Loganair flights

Travelling to a place near London?

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Why use momondo?

Why should I use momondo to find a flight deal from Northern Ireland to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Northern Ireland to London for you.

Can I find flights from Northern Ireland to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Northern Ireland to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Northern Ireland to London?

Once all potential Northern Ireland to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Northern Ireland to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Northern Ireland to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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