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Cheap flights from London Heathrow Airport to Belfast Intl Airport from £84

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BFS
3 Sep — 10 Sep1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Belfast Intl are usually found in March or January, booked 66 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from Heathrow to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Belfast Intl (BFS). 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 29 August 2025.

Round-trip from

£164

One-way from

£84

Popular in

July

Cheapest in

March

Average price

£149
18/10-19/10
  • 18/10-19/10
  • 2 total stops
  • 20h 20m total
  • London to Belfast
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18/9
  • 18/9
  • 1 total stop
  • 23h 25m total
  • London to Belfast
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£16 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Find flight deals from Heathrow to Belfast Intl

Cheapest flights from Heathrow to Belfast Intl
Explore the most affordable flight options available from Heathrow to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

Sat 18/1020:10LHR - BFS
1 stop10h 40mMultiple Airlines
Sun 19/1022:55BFS - LHR
1 stop9h 40mMultiple Airlines
Deal found 27/8£164
Sun 12/1009:00LHR - BFS
1 stop10h 05mMultiple Airlines
Sun 19/1021:00BFS - LHR
2 stops17h 45mMultiple Airlines
Deal found 28/8£233
Sat 27/906:15LHR - BFS
1 stop5h 40mMultiple Airlines
Sat 4/1012:35BFS - LHR
1 stop6h 00mMultiple Airlines
Deal found 28/8£240
Fri 10/1006:45LHR - BFS
1 stop9h 55mMultiple Airlines
Sun 12/1022:55BFS - LHR
1 stop22h 55mMultiple Airlines
Deal found 29/8£244
Thu 23/1017:50LHR - BFS
2 stops15h 05mMultiple Airlines
Thu 30/1007:30BFS - LHR
2 stops12h 05mMultiple Airlines
Deal found 27/8£246
Sat 4/1006:15LHR - BFS
1 stop10h 25mMultiple Airlines
Tue 7/1014:50BFS - LHR
1 stop6h 35mMultiple Airlines
Deal found 27/8£248
Wed 1/1015:50LHR - BFS
2 stops7h 10mMultiple Airlines
Mon 6/1015:30BFS - LHR
1 stop5h 55mMultiple Airlines
Deal found 27/8£254
Fri 5/906:15LHR - BFS
1 stop7h 50mMultiple Airlines
Thu 11/919:35BFS - LHR
1 stop12h 25mMultiple Airlines
Deal found 27/8£258
Fri 7/1108:40LHR - BFS
1 stop5h 00mMultiple Airlines
Sun 9/1114:45BFS - LHR
1 stop4h 30mMultiple Airlines
Deal found 27/8£261
Tue 30/906:15LHR - BFS
1 stop5h 25mMultiple Airlines
Sat 11/1012:35BFS - LHR
1 stop6h 00mMultiple Airlines
Deal found 28/8£264
Thu 2/1017:10LHR - BFS
1 stop5h 15mMultiple Airlines
Sun 5/1013:20BFS - LHR
1 stop4h 30mMultiple Airlines
Deal found 27/8£269

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Belfast Intl 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 858,174 searches. Data last updated 29 August 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Belfast Intl Airport that are best for you.

Fly from

Heathrow

Fly to

Belfast Intl

Route

Depart

Return

Price

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sat 18/10

20:10-06:50

1 stop10h 40m

Belfast Intl

Sun 19/10

22:55-08:35

1 stop9h 40m

£164

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sun 12/10

09:00-19:05

1 stop10h 05m

Belfast Intl

Sun 19/10

21:00-14:45

2 stops17h 45m

£233

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sat 27/9

06:15-11:55

1 stop5h 40m

Belfast Intl

Sat 4/10

12:35-18:35

1 stop6h 00m

£240

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 10/10

06:45-16:40

1 stop9h 55m

Belfast Intl

Sun 12/10

22:55-21:50

1 stop22h 55m

£244

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Thu 23/10

17:50-08:55

2 stops15h 05m

Belfast Intl

Thu 30/10

07:30-19:35

2 stops12h 05m

£246

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sat 4/10

06:15-16:40

1 stop10h 25m

Belfast Intl

Tue 7/10

14:50-21:25

1 stop6h 35m

£248

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Thu 16/10

06:15-14:00

1 stop7h 45m

Belfast Intl

Mon 20/10

15:30-21:25

1 stop5h 55m

£248

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Wed 1/10

15:50-23:00

2 stops7h 10m

Belfast Intl

Mon 6/10

15:30-21:25

1 stop5h 55m

£254

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 7/11

08:40-13:40

1 stop5h 00m

Belfast Intl

Sun 9/11

14:45-19:15

1 stop4h 30m

£261

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Tue 30/9

06:15-11:40

1 stop5h 25m

Belfast Intl

Sat 11/10

12:35-18:35

1 stop6h 00m

£264

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 19 results
1
2

Best time to book a flight from Heathrow to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Heathrow 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 London Heathrow Airport to Belfast Intl Airport

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Belfast Intl. Price data was last updated on 22 August 2025.

Booking 66 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Belfast Intl 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 London Heathrow Airport to Belfast Intl Airport?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Belfast Intl Airport (average of £67). Flying from London Heathrow Airport to Belfast Intl Airport in July is currently the most expensive (average of £90). 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 LHR to BFS?

Find hourly flight availability from Heathrow to Belfast Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 August 2025.

One of the essential ways to save on airfare from London Heathrow Airport to Belfast Intl Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 17% on airfare.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Belfast Intl. Price data was last updated on 16 December 2024.

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

Reviews of airlines servicing Belfast Intl

Get insights into the airlines that provide service to Belfast Intl. 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 Belfast Intl. Reviews last updated 29 August 2025.
Check out reviews from past customers who have flown with easyJet and British Airways from London Heathrow Airport to Belfast Intl 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

Boarding

6.7

Comfort

6.7

Overall

6.9

Crew

7.6

Food

5.9

Entertainment

5.5

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

Boarding

6.7

Comfort

6.7

Overall

6.9

Crew

7.6

Food

5.9

Entertainment

5.5

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!
British Airways
6.7
Okay
7,320 reviews
easyJet
6.9
Okay
1,817 reviews
Check prices

Boarding

6.7

Comfort

6.7

Overall

6.9

Crew

7.6

Food

5.9

Entertainment

5.5

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!

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Belfast Intl. 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 London Heathrow Airport to Belfast Intl Airport round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to Belfast Intl Airport round-trip from £30. Another airline that can offer you cheap pricing is British Airways. These flights start at 76% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Belfast Intl Airport (average of £67). Flying from London Heathrow Airport to Belfast Intl Airport in July is currently the most expensive (average of £90). 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 Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry
Ballymena
Cookstown
Dungannon

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Heathrow to Belfast Intl

Discover the top 2 airlines that operate flights from Heathrow to Belfast Intl. 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 858,174 searches. Data last updated 29 August 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£30Average£70FlexibilityNo cancel feeOn-time86%
Search easyJet flights
British AirwaysCheapest£78Average£127FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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 Heathrow to Belfast Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Belfast Intl from Heathrow today with Cheapflights!

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

Cheapflights helps you find that perfect flight to Belfast Intl from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from Heathrow to Belfast Intl with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Belfast Intl from Heathrow today and book when prices fit your budget.

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