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Cheap flights from Belfast Intl Airport to London Heathrow Airport from £73

BFS — LHR
22 Oct — 29 Oct1
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 5/1109:25 -
2 stops12h 35m
Sun 8/1107:45 -
1 stop23h 00m
Deal found 19/9£166
Tue 3/1107:05 -
1 stop9h 30m
Tue 10/1106:20 -
1 stop5h 10m
Deal found 19/9£190
Mon 12/1014:40 -
1 stop23h 35m
Tue 3/1108:50 -
2 stops7h 55m
Deal found 18/9£192
Wed 4/1114:25 -
1 stop7h 00m
Wed 11/1117:35 -
1 stop14h 30m
Deal found 20/9£201
Sat 3/1006:30 -
2 stops8h 00m
Tue 6/1015:50 -
2 stops7h 15m
Deal found 18/9£212

Find flight deals from Belfast Intl to Heathrow

Round-trip from

£166

One-way from

£73

Popular in

March

Cheapest in

December

Average price

£133
5/11-8/11
  • 5/11-8/11
  • 3 total stops
  • 35h 35m total
  • Belfast to London
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21/10-31/12
  • 21/10-31/12
  • 1 total stop
  • 10h 30m total
  • Belfast to London
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Highest demand for flights based on searches. 4% potential increase in price (£5 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 September 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

Sun 29/11

07:15-20:05

2 stops12h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£88

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Fri 2/10

06:40-14:30

2 stops7h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£96

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Fri 16/10

06:40-14:30

2 stops7h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£97

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Thu 8/10

22:40-14:30

2 stops15h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£98

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Sat 3/10

06:30-14:30

2 stops8h 00m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£100

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Mon 2/11

22:05-10:10

2 stops12h 05m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£107

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Tue 29/9

07:35-18:20

2 stops10h 45m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£111
Fastest return journey

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Thu 1/10

08:50-16:00

2 stops7h 10m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£113

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Fri 23/10

06:40-14:30

2 stops7h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£116

BelfastLondon

BFS Belfast Intl - LHR London Heathrow

BFSLHR

Belfast Intl

Mon 25/1

07:20-15:35

2 stops8h 15m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£124

Flights are sorted by cheapest return flights first.

Deals found on 19/9

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, December is the cheapest month in which you can book a flight from Belfast Intl Airport to London Heathrow Airport (average of £120). 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 £108 and £158 in November.
The cheapest return price found within the last 5 days was £166 on Multiple Airlines (5 Nov–8 Nov).

Reviews of airlines servicing Heathrow

Check out reviews from past customers who have flown with easyJet and 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.
easyJet
6.9
Okay
1,930 reviews
Check prices

Food

5.9

Boarding

6.7

Comfort

6.8

Crew

7.7

Overall

6.9

Entertainment

5.5

Reviews

1 / 20
6.0
Good

Aleksandra,Sept 2026

RMU - LGW

Not sure Why there is no N/A option in questions as there was definitely no entertainment on EasyJet. Or food unless one pays for the dubious plastic-wrapped “ food”.
easyJet
6.9
Okay
1,930 reviews
easyJet
6.9
Okay
1,930 reviews
Check prices

Food

5.9

Boarding

6.7

Comfort

6.8

Crew

7.7

Overall

6.9

Entertainment

5.5

Reviews

1 / 20
6.0
Good

Aleksandra,Sept 2026

RMU - LGW

Not sure Why there is no N/A option in questions as there was definitely no entertainment on EasyJet. Or food unless one pays for the dubious plastic-wrapped “ food”.
British Airways
6.7
Okay
8,227 reviews
easyJet
6.9
Okay
1,930 reviews
Check prices

Food

5.9

Boarding

6.7

Comfort

6.8

Crew

7.7

Overall

6.9

Entertainment

5.5

Reviews

1 / 20
6.0
Good

Aleksandra,Sept 2026

RMU - LGW

Not sure Why there is no N/A option in questions as there was definitely no entertainment on EasyJet. Or food unless one pays for the dubious plastic-wrapped “ food”.

Related info for your journey

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

    easyJet, at £35, was found to be the cheapest airline from Belfast Intl Airport to London Heathrow Airport. An alternate airline flying to your destination would be British Airways. easyJet is priced at 75% 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, December is the cheapest month in which you can book a flight from Belfast Intl Airport to London Heathrow Airport (average of £120). 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
Gatwick
Wembley
Slough
Ilford
Hayes
Croydon
Northampton
Colchester
Eastbourne
Enfield
Brentford
Southend-on-Sea
Barnet
Southall
Watford
Stratford-upon-Avon
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Belfast Intl to Heathrow

AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£35Average£111FlexibilityNo cancel feeOn-time86%
Search easyJet flights
British AirwaysCheapest£90Average£139FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

How does Cheapflights help users find flights from Belfast Intl to Heathrow?

Cheapflights makes it easy to find Belfast Intl to Heathrow 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 Belfast Intl to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast Intl to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes, we can. To see specific flights from Belfast Intl to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

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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