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Heathrow

$129+ Cheap flights from Belfast Intl (BFS) to Heathrow (LHR)

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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LHR
Aug 10 — Aug 171
Mon 8/10
Mon 8/17
1 adult, Economy
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Cheap flight deals from Belfast Intl to Heathrow

Cheapest flights from Belfast Intl to Heathrow
Explore the most affordable flight options available from Belfast Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 11, 2026.

This Mytrip deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:10 am
BFS
-
LHR
1 stop13h 55m
Multiple Airlines
Sun 10/118:50 pm
LHR
-
BFS
1 stop11h 50m
Multiple Airlines
Deal found 7/6$360
This Kiwi.com deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:55 am
BFS
-
LHR
2 stops7h 35m
Multiple Airlines
Thu 8/278:30 pm
LHR
-
BFS
1 stop12h 10m
Multiple Airlines
Deal found 7/10$387
This Kiwi.com deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/131:45 pm
BFS
-
LHR
2 stops5h 40m
Multiple Airlines
Wed 8/269:55 am
LHR
-
BFS
1 stop14h 10m
Multiple Airlines
Deal found 7/9$405
This Mytrip deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:20 pm
BFS
-
LHR
2 stops25h 40m
Multiple Airlines
Thu 11/126:30 am
LHR
-
BFS
2 stops13h 25m
Multiple Airlines
Deal found 7/8$461
This Kiwi.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/79:40 am
BFS
-
LHR
2 stops7h 40m
Multiple Airlines
Thu 8/208:30 pm
LHR
-
BFS
1 stop12h 10m
Multiple Airlines
Deal found 7/6$489
This Kiwi.com deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:40 am
BFS
-
LHR
2 stops7h 15m
Multiple Airlines
Thu 8/138:30 pm
LHR
-
BFS
1 stop12h 10m
Multiple Airlines
Deal found 7/9$508
This Mytrip deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:20 am
BFS
-
LHR
2 stops13h 45m
Multiple Airlines
Thu 8/279:55 am
LHR
-
BFS
2 stops12h 35m
Multiple Airlines
Deal found 7/7$515

Find flight deals from Belfast Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to Heathrow (LHR). 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 July 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$360
(Mytrip)

One-way from

$129
(Kiwi.com)

Popular in

July

Cheapest in

December

Average price

$205
Provider with most accurate pricing for Belfast Intl-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Belfast Intl-London Heathrow flights.
Search Deals
From Belfast Intl to London Heathrow
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One-way flight from Belfast Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in July 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Belfast Intl to Heathrow 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 2,558,603 searches. Data last updated July 11, 2026.
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 round-trip

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Sun 10/4

6:10 am-8:05 pm

1 stop13h 55m

London Heathrow

Sun 10/11

8:50 pm-8:40 am

1 stop11h 50m

$360

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Wed 8/26

5:55 am-1:30 pm

2 stops7h 35m

London Heathrow

Thu 8/27

8:30 pm-8:40 am

1 stop12h 10m

$387

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Thu 8/13

1:45 pm-7:25 pm

2 stops5h 40m

London Heathrow

Wed 8/26

9:55 am-12:05 am

1 stop14h 10m

$405

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Thu 11/5

8:20 pm-10:00 pm

2 stops25h 40m

London Heathrow

Thu 11/12

6:30 am-7:55 pm

2 stops13h 25m

$461

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Fri 8/7

9:40 am-5:20 pm

2 stops7h 40m

London Heathrow

Thu 8/20

8:30 pm-8:40 am

1 stop12h 10m

$489
Quickest round-trip

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Thu 8/6

6:40 am-1:55 pm

2 stops7h 15m

London Heathrow

Thu 8/13

8:30 pm-8:40 am

1 stop12h 10m

$508

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Thu 8/13

6:20 am-8:05 pm

2 stops13h 45m

London Heathrow

Thu 8/27

9:55 am-10:30 pm

2 stops12h 35m

$515
Cheapest one-way

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Mon 9/14

9:10 am-8:05 pm

1 stop10h 55m

$129

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Wed 8/19

7:30 am-6:55 pm

2 stops11h 25m

$133

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Mon 9/21

8:40 am-8:05 pm

2 stops11h 25m

$140

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 15 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Belfast Intl Airport-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Belfast Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Belfast Intl Airport-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Belfast Intl Airport-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Belfast Intl Airport-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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 Belfast Intl Airport to London Heathrow Airport

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

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from Belfast Intl Airport to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $155). Flying from Belfast Intl Airport to London Heathrow Airport in July is currently the most expensive (average of $199). 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 to fly round-trip from Belfast Intl Airport to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated July 11, 2026.
Read through reviews of airlines operating flights from Belfast Intl Airport to London Heathrow Airport, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,106 reviews

Boarding

6.9

Food

6.4

Overall

6.7

Entertainment

6.4

Crew

7.7

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.
British Airways
6.7
Okay
8,106 reviews
British Airways
6.7
Okay
8,106 reviews

Boarding

6.9

Food

6.4

Overall

6.7

Entertainment

6.4

Crew

7.7

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.

Related info for your journey

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

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

    British Airways, at $121, was found to be the cheapest airline from Belfast Intl Airport to London Heathrow Airport.. British Airways is 32% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 vacation 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 $155). Flying from Belfast Intl Airport to London Heathrow Airport in July is currently the most expensive (average of $199). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Watford
Northampton
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Belfast Intl to Heathrow

Discover the top airline that operate flights from Belfast Intl to Heathrow. 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 2,558,603 searches. Data last updated July 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$121Average$256FlexibilityNo cancel feeOn-time70%

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