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Cheap flights from London Heathrow Airport to Belfast from $150

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Belfast departing on 10/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London Heathrow Airport to Belfast

Cheap round-trip flights

Logo
6:45 pm - 10:50 pmLHR-BFS
28h 05m2 stops
Logo
6:00 am - 10:55 pmBFS-LHR
16h 55m2 stops
$361
Find Deal
Sat, Oct 11 - Wed, Oct 15
Logo
3:50 pm - 10:30 pmLHR-BFS
6h 40m2 stops
Logo
9:15 am - 7:30 pmBFS-LHR
10h 15m1 stop
$433
Find Deal
Tue, Oct 14 - Tue, Oct 21
Logo
7:00 am - 12:50 pmLHR-BFS
5h 50m1 stop
Logo
7:30 am - 6:40 pmBFS-LHR
11h 10m1 stop
$749
Find Deal
Fri, Dec 26 - Fri, Jan 2
Logo
2:25 pm - 10:20 pmLHR-BFS
7h 55m1 stop
Logo
7:30 am - 1:40 pmBFS-LHR
6h 10m1 stop
$949
Find Deal
Sun, Dec 28 - Fri, Jan 2
Logo
7:00 am - 12:50 pmLHR-BFS
5h 50m1 stop
Logo
2:05 pm - 9:25 pmBFS-LHR
7h 20m1 stop
$1,027
Find Deal
Fri, Dec 26 - Sat, Jan 3
Logo
7:00 am - 12:50 pmLHR-BFS
5h 50m1 stop
Logo
7:25 am - 6:40 pmBFS-LHR
11h 15m1 stop
$1,064
Find Deal
Fri, Dec 26 - Sun, Jan 4
Logo
2:25 pm - 9:55 pmLHR-BFS
7h 30m1 stop
Logo
2:05 pm - 9:25 pmBFS-LHR
7h 20m1 stop
$1,091
Find Deal
Mon, Dec 29 - Sat, Jan 3
Logo
2:25 pm - 10:20 pmLHR-BFS
7h 55m1 stop
Logo
2:05 pm - 9:25 pmBFS-LHR
7h 20m1 stop
$1,140
Find Deal
Sun, Dec 28 - Sat, Jan 3
Logo
2:25 pm - 9:55 pmLHR-BFS
7h 30m1 stop
Logo
7:25 am - 4:40 pmBFS-LHR
9h 15m1 stop
$1,276
Find Deal
Mon, Dec 29 - Sun, Jan 4
Logo
2:25 pm - 7:25 pmLHR-BFS
5h 00m1 stop
Logo
7:30 am - 6:40 pmBFS-LHR
11h 10m1 stop
$1,360
Find Deal
Sat, Dec 27 - Fri, Jan 2

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport to Belfast Intl Airport 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, momondo users made 832,500 searches. Data last updated September 15, 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

Fly to

Route

Depart

Return

Price

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sat 10/11

6:45 pm-10:50 pm

2 stops28h 05m

Belfast Intl

Wed 10/15

6:00 am-10:55 pm

2 stops16h 55m

$361

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Tue 10/14

3:50 pm-10:30 pm

2 stops6h 40m

Belfast Intl

Tue 10/21

9:15 am-7:30 pm

1 stop10h 15m

$433

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 12/26

7:00 am-12:50 pm

1 stop5h 50m

Belfast Intl

Fri 1/2

7:30 am-6:40 pm

1 stop11h 10m

$749

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sun 12/28

2:25 pm-10:20 pm

1 stop7h 55m

Belfast Intl

Fri 1/2

7:30 am-1:40 pm

1 stop6h 10m

$949

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 12/26

7:00 am-12:50 pm

1 stop5h 50m

Belfast Intl

Sat 1/3

2:05 pm-9:25 pm

1 stop7h 20m

$1,027

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 12/26

7:00 am-12:50 pm

1 stop5h 50m

Belfast Intl

Sun 1/4

7:25 am-6:40 pm

1 stop11h 15m

$1,064

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Mon 12/29

2:25 pm-9:55 pm

1 stop7h 30m

Belfast Intl

Sat 1/3

2:05 pm-9:25 pm

1 stop7h 20m

$1,091

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sun 12/28

2:25 pm-10:20 pm

1 stop7h 55m

Belfast Intl

Sat 1/3

2:05 pm-9:25 pm

1 stop7h 20m

$1,140

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Mon 12/29

2:25 pm-9:55 pm

1 stop7h 30m

Belfast Intl

Sun 1/4

7:25 am-4:40 pm

1 stop9h 15m

$1,276

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sat 12/27

2:25 pm-7:25 pm

1 stop5h 00m

Belfast Intl

Fri 1/2

7:30 am-6:40 pm

1 stop11h 10m

$1,360

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from London Heathrow Airport to Belfast Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Belfast Intl Airport?

The month of January is, on average, the cheapest month to fly to Belfast Intl Airport from London Heathrow Airport, with most prices found around $133. If you’re not able to fly to Belfast Intl Airport in January, then March is your next best option. Flight prices from London Heathrow Airport to Belfast Intl Airport during March average around $133.

What is the cheapest day to depart on your flight to Belfast Intl Airport?

The cheapest day to depart on your flight to Belfast Intl Airport is on a Wednesday when prices can be found for as low as $72. This is often the case because there is less demand to fly during this day of the week. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Belfast Intl Airport for around $118.

What is the cheapest time of day to depart on your flight to Belfast Intl Airport?

In the morning is the cheapest time of day to fly from London Heathrow Airport to Belfast Intl Airport when you can find flight prices for as low as $122. Flying to Belfast Intl Airport in the morning is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Belfast Intl Airport is at noon when prices are around $175.

How far in advance should I book a flight to Belfast Intl Airport?

You are more likely to see cheaper flights to Belfast Intl Airport from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Belfast Intl Airport for around $172 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Belfast Intl Airport from London Heathrow Airport for as low as $121 on momondo.

How have London Heathrow Airport to Belfast Intl Airport flight prices changed over time?

As of September 2025, prices for London Heathrow Airport to Belfast Intl Airport flights are approximately 50% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Belfast Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Heathrow Airport to Belfast Intl Airport (LHR to BFS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Belfast Intl Airport

Direct flights

None
There are no direct flights from London Heathrow Airport to Belfast Intl Airport. There are no popular flight routes from London Heathrow Airport to Belfast Intl Airport.
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  • How far is London Heathrow to Belfast Intl by plane?

    The straight-line distance from London Heathrow to Belfast Intl is 324.6 mi. 5h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from London Heathrow Airport to Belfast Intl Airport?

    Prices for flights from London Heathrow Airport to Belfast Intl Airport were last updated today.

  • How many operators does momondo search for flights from London Heathrow Airport to Belfast Intl Airport?

  • How old do you have to be to fly from London Heathrow Airport to Belfast Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The required travel and health documents for your Belfast Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Belfast Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from London Heathrow Airport to Belfast Intl Airport?

Best airlines flying from London Heathrow Airport to Belfast Intl Airport

Compare and see reviews for airlines that fly from London Heathrow Airport to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $111Free CancellationRating
6.6
7,361 reviews
Search British Airways flights

Traveling to a place near Belfast?

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

Why use momondo?

Why should I use momondo to find a flight deal from London to Belfast?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Belfast. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Belfast with flexible booking policies on momondo?

Flights from London to Belfast with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Belfast?

momondo provides multiple filters to help you find the best flight to Belfast from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from London to Belfast right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Belfast from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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