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Cheap flights from Belfast Intl Airport to London Heathrow Airport from £79

BFS — LHR
9 Dec — 16 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Heathrow

Thu 10/1209:25 -
1 stop21h 00m
Mon 14/1207:45 -
1 stop24h 10m
Deal found 5/11£170
Sat 21/1123:00 -
1 stop11h 10m
Sun 22/1121:05 -
1 stop9h 40m
Deal found 7/11£180
Sat 12/1207:00 -
1 stop7h 25m
Mon 14/1220:30 -
1 stop11h 30m
Deal found 5/11£184
Sun 20/1221:00 -
1 stop10h 25m
Sun 27/1221:20 -
1 stop10h 15m
Deal found 5/11£186
Thu 10/1219:40 -
1 stop12h 20m
Sun 13/1206:45 -
1 stop3h 40m
Deal found 6/11£201
Thu 3/1214:30 -
1 stop6h 55m
Wed 9/1219:25 -
1 stop12h 30m
Deal found 7/11£202

Find flight deals from Belfast Intl to Heathrow

Round-trip from

£170

One-way from

£79

Popular in

March

Cheapest in

October

Average price

£130
10/12-14/12
  • 10/12-14/12
  • 2 total stops
  • 45h 10m total
  • Belfast to London
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19/12-31/12
  • 19/12-31/12
  • 1 total stop
  • 11h 10m total
  • Belfast to London
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£8 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in November 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Belfast Intl Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Tue 15/12

08:45-18:00

2 stops9h 15m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£85

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Thu 17/12

19:40-08:00

1 stop12h 20m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£89

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Tue 1/12

08:25-20:05

2 stops11h 40m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£103

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Sun 6/12

08:50-22:40

2 stops13h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£105

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Thu 10/12

09:25-20:05

2 stops10h 40m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£109
Fastest return journey

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Wed 2/12

08:15-16:50

2 stops8h 35m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£115

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Tue 17/11

07:15-22:40

2 stops15h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£117

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Thu 19/11

10:15-22:40

2 stops12h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£121

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Sat 28/11

06:30-17:15

2 stops10h 45m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£124

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Fri 11/12

19:50-08:05

2 stops12h 15m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£126

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Belfast Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Belfast Intl with our price prediction graph.
Estimated return price

Cheapflights Insights

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

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

To ensure you get the cheapest price possible for a flight from Belfast Intl Airport to London Heathrow Airport, you should look to book at least 54 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 Belfast Intl Airport to London Heathrow Airport?

Currently, October is the cheapest month in which you can book a flight from Belfast Intl Airport to London Heathrow Airport (average of £127). Flying from Belfast Intl Airport to London Heathrow Airport in March is currently the most expensive (average of £174). 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.

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

Airfare is above average for this route at the moment.

Belfast Intl Airport to London Heathrow Airport flights typically cost between £112 and £151 in December.
The cheapest return price found within the last 5 days was £170 on Multiple Airlines (10 Dec–14 Dec).

Reviews of airlines servicing Heathrow

Check out reviews from past customers who have flown with British Airways from Belfast Intl Airport to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,286 reviews
Check prices

Crew

7.7

Overall

6.7

Entertainment

6.5

Comfort

6.8

Food

6.4

Boarding

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Oct 2026

MRS - LHR

Attendants didn't let me board with my fragile guitar so I had to check it in. Who knows what the freezing icicles did to it. Was not happy. Had to run to catch my connection in Heathrow after riding one bus and another train? Then, the fellow next to me asked if I would switch my window seat with his girlfriend who had a middle seat. What nerve! I said no. The food was unhealthy and the seats were cramped. Could not wait to exit.
British Airways
6.7
Okay
8,286 reviews
British Airways
6.7
Okay
8,286 reviews
Check prices

Crew

7.7

Overall

6.7

Entertainment

6.5

Comfort

6.8

Food

6.4

Boarding

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Oct 2026

MRS - LHR

Attendants didn't let me board with my fragile guitar so I had to check it in. Who knows what the freezing icicles did to it. Was not happy. Had to run to catch my connection in Heathrow after riding one bus and another train? Then, the fellow next to me asked if I would switch my window seat with his girlfriend who had a middle seat. What nerve! I said no. The food was unhealthy and the seats were cramped. Could not wait to exit.

Related info for your journey

  • What is the cheapest airline to fly from Belfast Intl Airport to London Heathrow Airport round-trip?

    British Airways, at £92, was found to be the cheapest airline from Belfast Intl Airport to London Heathrow Airport.. British Airways is priced at 34% lower than the current average price of a flight leaving 3 months from now.

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

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

  • How can I find direct flights from Belfast Intl to Heathrow?

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl to Heathrow 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 Belfast Intl Airport to London Heathrow Airport?

    Currently, October is the cheapest month in which you can book a flight from Belfast Intl Airport to London Heathrow Airport (average of £127). Flying from Belfast Intl Airport to London Heathrow Airport in March is currently the most expensive (average of £174). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Luton
Milton Keynes
Wembley
Gatwick
Slough
Ilford
Hayes
Croydon
Eastbourne
Northampton
Barnet
Brentford
Southend-on-Sea
Enfield
Southall
Harrow
Watford
Folkestone
Dagenham

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Belfast Intl to Heathrow

AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£92Average£138FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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Yes, Cheapflights offers price alerts on Belfast Intl to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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