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

easyJet, at £31, 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 73% lower than the current average price of a flight leaving 3 months from now.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

Flights from Belfast Intl Airport to London Heathrow Airport are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

What is the cheapest month to fly from Belfast Intl Airport to London Heathrow Airport?

January can be a great time to fly to London Heathrow Airport from Belfast Intl Airport with a flight ticket averaging about £64. Cheapflights users have found deals in the month of January for as cheap as £26. The most expensive prices can be found in the month of August.

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.

£76+ Flights from Belfast Intl Airport to London Heathrow Airport

Q: How far in advance should I book a flight from Belfast Intl Airport to London Heathrow Airport?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 34 days in advance, which can save you up to 74% on flights from Belfast Intl Airport to London Heathrow Airport compared to booking the week you need them. Waiting 34 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £48. For sooner than that we have options available in the next 3 days from £125.

Cheapflights Tip: The best prices from Belfast Intl to London Heathrow are usually found in January or March, booked 58 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap flight deals from Belfast Intl to Heathrow

Round-trip from	£166
One-way from	£76
Popular in	August
Cheapest in	January
Average price	£142

9/10-16/10
2 total stops
15h 05m total
Belfast to London

Search Deals

10/11
2 total stops
19h 25m total
Belfast to London

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£12 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find 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 27 August 2025.

Do 9/1008:10BFS - LHR

1 stop6h 50mMultiple Airlines

Do 16/1007:00LHR - BFS

1 stop8h 15mMultiple Airlines

Deal found 25/8£166

Mi 24/907:15BFS - LHR

1 stop3h 20mMultiple Airlines

Mi 1/1021:35LHR - BFS

1 stop9h 10mMultiple Airlines

Deal found 25/8£189

Do 11/908:10BFS - LHR

1 stop6h 50mMultiple Airlines

So 14/921:40LHR - BFS

1 stop10h 30mMultiple Airlines

Deal found 25/8£189

So 23/1117:05BFS - LHR

1 stop4h 40mMultiple Airlines

Di 25/1107:45LHR - BFS

1 stop3h 55mMultiple Airlines

Deal found 24/8£191

Fr 14/1121:00BFS - LHR

1 stop10h 30mMultiple Airlines

Mo 24/1109:50LHR - BFS

1 stop3h 20mMultiple Airlines

Deal found 25/8£212

So 23/1112:30BFS - LHR

1 stop5h 55mMultiple Airlines

So 30/1107:45LHR - BFS

1 stop7h 00mMultiple Airlines

Deal found 24/8£220

Mo 1/922:20BFS - LHR

1 stop10h 45mMultiple Airlines

Mo 8/921:40LHR - BFS

1 stop9h 25mMultiple Airlines

Deal found 25/8£248

Sa 11/1016:40BFS - LHR

2 stops16h 30mMultiple Airlines

Mo 13/1009:05LHR - BFS

1 stop12h 00mMultiple Airlines

Deal found 26/8£249

Do 9/1021:55BFS - LHR

1 stop9h 30mMultiple Airlines

So 12/1019:00LHR - BFS

1 stop3h 05mMultiple Airlines

Deal found 25/8£252

Do 4/906:00BFS - LHR

1 stop4h 10mMultiple Airlines

So 7/918:05LHR - BFS

1 stop4h 25mMultiple Airlines

Deal found 24/8£252

Best flights from Belfast Intl to Heathrow
Discover carefully curated flight deals from Belfast Intl to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 August 2025.

Do 9/1008:10BFS - LHR

1 stop6h 50mMultiple Airlines

Do 16/1007:00LHR - BFS

1 stop8h 15mMultiple Airlines

Deal found 25/8£166

Mi 24/907:15BFS - LHR

1 stop3h 20mMultiple Airlines

Mi 1/1021:35LHR - BFS

1 stop9h 10mMultiple Airlines

Deal found 25/8£189

Do 11/908:10BFS - LHR

1 stop6h 50mMultiple Airlines

So 14/921:40LHR - BFS

1 stop10h 30mMultiple Airlines

Deal found 25/8£189

So 23/1117:05BFS - LHR

1 stop4h 40mMultiple Airlines

Di 25/1107:45LHR - BFS

1 stop3h 55mMultiple Airlines

Deal found 24/8£191

Fr 14/1121:00BFS - LHR

1 stop10h 30mMultiple Airlines

Mo 24/1109:50LHR - BFS

1 stop3h 20mMultiple Airlines

Deal found 25/8£212

So 23/1112:30BFS - LHR

1 stop5h 55mMultiple Airlines

So 30/1107:45LHR - BFS

1 stop7h 00mMultiple Airlines

Deal found 24/8£220

Sa 11/1016:40BFS - LHR

2 stops16h 30mMultiple Airlines

Mo 13/1009:05LHR - BFS

1 stop12h 00mMultiple Airlines

Deal found 26/8£249

Do 9/1021:55BFS - LHR

1 stop9h 30mMultiple Airlines

So 12/1019:00LHR - BFS

1 stop3h 05mMultiple Airlines

Deal found 25/8£252

Mo 29/910:05BFS - LHR

1 stop7h 30mMultiple Airlines

Fr 3/1014:45LHR - BFS

1 stop7h 40mMultiple Airlines

Deal found 26/8£259

Mo 13/1015:30BFS - LHR

1 stop5h 55mMultiple Airlines

Di 28/1008:50LHR - BFS

2 stops11h 25mMultiple Airlines

Deal found 26/8£269

Last-minute flights from Belfast Intl to Heathrow
Discover last-minute flight deals from Belfast Intl to Heathrow. Data last updated 27 August 2025 and is based on user searches.

Mi 27/817:45BFS - LHR

1 stop3h 10mMultiple Airlines

Mi 3/915:20LHR - BFS

1 stop6h 20mMultiple Airlines

Deal found 24/8£305

Mo 1/922:20BFS - LHR

1 stop10h 45mMultiple Airlines

Mo 8/921:40LHR - BFS

1 stop9h 25mMultiple Airlines

Deal found 25/8£248

Do 4/906:00BFS - LHR

1 stop4h 10mMultiple Airlines

So 7/918:05LHR - BFS

1 stop4h 25mMultiple Airlines

Deal found 24/8£252

Do 11/908:10BFS - LHR

1 stop6h 50mMultiple Airlines

So 14/921:40LHR - BFS

1 stop10h 30mMultiple Airlines

Deal found 25/8£189

Fr 12/908:20BFS - LHR

1 stop8h 35mMultiple Airlines

Mo 15/906:15LHR - BFS

1 stop3h 00mMultiple Airlines

Deal found 25/8£292

Fr 19/921:20BFS - LHR

1 stop10h 10mMultiple Airlines

So 21/919:00LHR - BFS

1 stop3h 05mMultiple Airlines

Deal found 25/8£286

Di 23/914:50BFS - LHR

1 stop6h 35mMultiple Airlines

Di 30/906:15LHR - BFS

1 stop5h 25mMultiple Airlines

Deal found 26/8£307

Mi 24/907:15BFS - LHR

1 stop3h 20mMultiple Airlines

Mi 1/1021:35LHR - BFS

1 stop9h 10mMultiple Airlines

Deal found 25/8£189

Mi 24/908:40BFS - LHR

1 stop4h 20mMultiple Airlines

Fr 26/915:15LHR - BFS

1 stop8h 15mMultiple Airlines

Deal found 25/8£308

Sa 27/921:40BFS - LHR

1 stop9h 50mMultiple Airlines

Sa 4/1017:30LHR - BFS

1 stop3h 40mMultiple Airlines

Deal found 24/8£281

Mo 29/910:05BFS - LHR

1 stop7h 30mMultiple Airlines

Fr 3/1014:45LHR - BFS

1 stop7h 40mMultiple Airlines

Deal found 26/8£259

One-way flights from Belfast Intl to Heathrow
Search for one-way flight options from Belfast Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated 27 August 2025.

Mo 10/1119:20BFS - LHR

2 stops19h 25mMultiple Airlines

Deal found 25/8£76

So 9/1109:15BFS - LHR

2 stops23h 40mMultiple Airlines

Deal found 24/8£81

Fr 19/910:55BFS - LHR

1 stop27h 20mMultiple Airlines

Deal found 26/8£82

Mo 22/915:30BFS - LHR

1 stop22h 45mMultiple Airlines

Deal found 26/8£84

So 21/921:00BFS - LHR

2 stops36h 10mMultiple Airlines

Deal found 25/8£87

Do 4/919:35BFS - LHR

1 stop18h 40mMultiple Airlines

Deal found 25/8£91

So 14/914:55BFS - LHR

1 stop23h 20mMultiple Airlines

Deal found 25/8£94

Mo 15/1206:50BFS - LHR

2 stops11h 10mMultiple Airlines

Deal found 26/8£97

Mo 1/912:35BFS - LHR

1 stop25h 40mMultiple Airlines

Deal found 26/8£98

Di 7/1014:50BFS - LHR

1 stop23h 25mMultiple Airlines

Deal found 26/8£99

Di 9/1212:10BFS - LHR

1 stop3h 25mMultiple Airlines

Deal found 25/8£99

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

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Do 9/10

08:10-15:00

1 stop6h 50m

London Heathrow

Do 16/10

07:00-15:15

1 stop8h 15m

£166

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Mi 24/9

07:15-10:35

1 stop3h 20m

London Heathrow

Mi 1/10

21:35-06:45

1 stop9h 10m

£189

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Do 11/9

08:10-15:00

1 stop6h 50m

London Heathrow

So 14/9

21:40-08:10

1 stop10h 30m

£189

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

So 23/11

17:05-21:45

1 stop4h 40m

London Heathrow

Di 25/11

07:45-11:40

1 stop3h 55m

£191

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Fr 14/11

21:00-07:30

1 stop10h 30m

London Heathrow

Mo 24/11

09:50-13:10

1 stop3h 20m

£212

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

So 23/11

12:30-18:25

1 stop5h 55m

London Heathrow

So 30/11

07:45-14:45

1 stop7h 00m

£220

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Sa 11/10

16:40-09:10

2 stops16h 30m

London Heathrow

Mo 13/10

09:05-21:05

1 stop12h 00m

£249

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Do 9/10

21:55-07:25

1 stop9h 30m

London Heathrow

So 12/10

19:00-22:05

1 stop3h 05m

£252

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Mo 29/9

10:05-17:35

1 stop7h 30m

London Heathrow

Fr 3/10

14:45-22:25

1 stop7h 40m

£259

BelfastLondon

BFS - LHR

BFSLHR

Belfast Intl

Mo 13/10

15:30-21:25

1 stop5h 55m

London Heathrow

Di 28/10

08:50-20:15

2 stops11h 25m

£269

Flights are sorted by cheapest return flights first.

Deals found on 25/8

Showing 1-10 of 20 results

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

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?

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 58 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, January is the cheapest month in which you can book a flight from Belfast Intl Airport to London Heathrow Airport (average of £112). Flying from Belfast Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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 BFS to LHR?

It’s optimal to fly from Belfast Intl Airport to London Heathrow Airport in the evening. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight at midday.

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

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

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

1,817 reviews

Check prices

Reviews

1 / 20

6.0

Good

Kathleen P,Jun 2025

LGW - GLA

Had to pay £48 because my personal item was 1cm too big! Not happy! First & last time to fly Easy Jet. This small back pack has been used on many domestic & international flights without a problem. I could have easily put it in my luggage as my bag was 5kg under weight. Instead, I was charged £48 even though it didn’t add any extra weight to the flight and it could easily fit under the seat. Hint: Check the “personal item” size carefully!

easyJet

6.9

Okay

1,817 reviews

easyJet

6.9

Okay

1,817 reviews

Check prices

Reviews

1 / 20

6.0

Good

Kathleen P,Jun 2025

LGW - GLA

British Airways

6.7

Okay

7,310 reviews

easyJet

6.9

Okay

1,817 reviews

Check prices

Reviews

1 / 20

6.0

Good

Kathleen P,Jun 2025

LGW - GLA

Related info for your journey

What are the cheapest airlines flying from Belfast Intl Airport to London Heathrow Airport round-trip?
easyJet, at £31, 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 73% 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, January is the cheapest month in which you can book a flight from Belfast Intl Airport to London Heathrow Airport (average of £112). Flying from Belfast Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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

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Croydon

Hounslow

Gatwick

Slough

Northampton

Luton

Deal

Wembley

Ilford

Crawley

Hayes

Watford

Folkestone

Ipswich

Chichester

Winchester

Eastbourne

Swindon

Dartford

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Belfast Intl to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
easyJet	Cheapest£31	Average£63	FlexibilityNo cancel fee	On-time86%	Search easyJet flights
British Airways	Cheapest£74	Average£124	FlexibilityNo cancel fee	On-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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Cheap flights from Belfast Intl Airport to London Heathrow Airport from £76

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Belfast Intl to London Heathrow are usually found in January or March, booked 58 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap flight deals from Belfast Intl to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Belfast Intl to Heathrow

Cheapest flights from Belfast Intl to HeathrowExplore 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 27 August 2025.

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 27 August 2025.

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.

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.

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?

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

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

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

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.

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

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

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

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

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

Travelling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Belfast Intl to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Belfast Intl to Heathrow

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 Belfast Intl to Heathrow?

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

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

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

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Travel Smart

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 27 August 2025.