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Cheap flights from London Heathrow Airport to Belfast from $121

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 9/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from London Heathrow Airport to Belfast

Cheap round-trip flights

Logo
6:15 am - 9:15 amLHR-BFS
3h 00m1 stop
Logo
4:40 pm - 9:50 pmBFS-LHR
5h 10m1 stop
$230
Find Deal
Mon, Oct 13 - Tue, Oct 14
Logo
9:55 pm - 8:40 amLHR-BFS
10h 45m1 stop
Logo
12:20 pm - 7:55 pmBFS-LHR
7h 35m1 stop
$247
Find Deal
Sun, Aug 31 - Thu, Sep 4
Logo
9:50 pm - 7:15 amLHR-BFS
9h 25m1 stop
Logo
5:45 pm - 9:50 pmBFS-LHR
4h 05m1 stop
$258
Find Deal
Mon, Aug 11 - Wed, Aug 13
Logo
10:10 pm - 8:00 amLHR-BFS
9h 50m1 stop
Logo
6:55 am - 5:55 pmBFS-LHR
11h 00m1 stop
$286
Find Deal
Fri, Aug 29 - Fri, Sep 5
Logo
6:15 am - 4:40 pmLHR-BFS
10h 25m1 stop
Logo
5:55 pm - 10:25 pmBFS-LHR
4h 30m1 stop
$306
Find Deal
Thu, Sep 25 - Sun, Sep 28
Logo
9:45 pm - 7:50 amLHR-BFS
10h 05m1 stop
Logo
2:55 pm - 8:50 pmBFS-LHR
5h 55m1 stop
$320
Find Deal
Sun, Sep 14 - Fri, Sep 19
Logo
6:45 am - 4:40 pmLHR-BFS
9h 55m1 stop
Logo
3:55 pm - 8:50 pmBFS-LHR
4h 55m1 stop
$322
Find Deal
Fri, Aug 29 - Sun, Aug 31
Logo
7:35 am - 4:10 pmLHR-BFS
8h 35m1 stop
Logo
7:00 am - 10:55 amBFS-LHR
3h 55m1 stop
$355
Find Deal
Sun, Sep 7 - Sun, Sep 14
Logo
10:00 pm - 7:50 amLHR-BFS
9h 50m1 stop
Logo
4:20 pm - 9:35 pmBFS-LHR
5h 15m1 stop
$364
Find Deal
Thu, Aug 28 - Fri, Aug 29
Logo
9:50 pm - 7:15 amLHR-BFS
9h 25m1 stop
Logo
12:20 pm - 4:30 pmBFS-LHR
4h 10m1 stop
$392
Find Deal
Sat, Sep 13 - Sat, Sep 20

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 July 31, 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

Mon 10/13

6:15 am-9:15 am

1 stop3h 00m

Belfast Intl

Tue 10/14

4:40 pm-9:50 pm

1 stop5h 10m

$230

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sun 8/31

9:55 pm-8:40 am

1 stop10h 45m

Belfast Intl

Thu 9/4

12:20 pm-7:55 pm

1 stop7h 35m

$247

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Mon 8/11

9:50 pm-7:15 am

1 stop9h 25m

Belfast Intl

Wed 8/13

5:45 pm-9:50 pm

1 stop4h 05m

$258

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 8/29

10:10 pm-8:00 am

1 stop9h 50m

Belfast Intl

Fri 9/5

6:55 am-5:55 pm

1 stop11h 00m

$286

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Thu 9/25

6:15 am-4:40 pm

1 stop10h 25m

Belfast Intl

Sun 9/28

5:55 pm-10:25 pm

1 stop4h 30m

$306

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sun 9/14

9:45 pm-7:50 am

1 stop10h 05m

Belfast Intl

Fri 9/19

2:55 pm-8:50 pm

1 stop5h 55m

$320

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 8/29

6:45 am-4:40 pm

1 stop9h 55m

Belfast Intl

Sun 8/31

3:55 pm-8:50 pm

1 stop4h 55m

$322

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sun 9/7

7:35 am-4:10 pm

1 stop8h 35m

Belfast Intl

Sun 9/14

7:00 am-10:55 am

1 stop3h 55m

$355

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Thu 8/28

10:00 pm-7:50 am

1 stop9h 50m

Belfast Intl

Fri 8/29

4:20 pm-9:35 pm

1 stop5h 15m

$364

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sat 9/13

9:50 pm-7:15 am

1 stop9h 25m

Belfast Intl

Sat 9/20

12:20 pm-4:30 pm

1 stop4h 10m

$392

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 typical price of a round-trip flight between London Heathrow Airport and Belfast Intl Airport?

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 Saturday, 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 $106.

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 $123. 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 in the evening when prices are around $178.

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 $170 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 $117 on momondo.

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

As of July 2025, prices for London Heathrow Airport to Belfast Intl Airport flights are approximately 4% 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

Best Price Found

$121

Fastest flight time

3h 00m

Direct flights

None
The best one-way flight to Belfast Intl Airport from London Heathrow Airport in the past 72 hours is $121. The best round-trip flight deal from London Heathrow Airport to Belfast Intl Airport found on momondo in the last 72 hours is $230.
The fastest flight from London Heathrow Airport to Belfast Intl Airport takes 3h 00m
There are no direct flights from London Heathrow Airport to Belfast Intl Airport. Popular non-direct route for this connection is London Heathrow Airport - Belfast Intl Airport.
Search flight deals

  • How far is London Heathrow to Belfast Intl by plane?

    The straight-line distance from London Heathrow to Belfast Intl is 324.6 mi. 3h 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
7,222 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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