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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 8/6. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from London Heathrow Airport to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:10 pm - 8:55 pm
LHR
-
BFS
5h 45m
2 stops
Multiple Airlines Logo
9:10 am - 8:05 pm
BFS
-
LHR
10h 55m
1 stop
$353Multiple Airlines
Mon, Aug 31 - Mon, Sep 7
Multiple Airlines Logo
2:20 pm - 9:45 pm
LHR
-
BFS
7h 25m
2 stops
Multiple Airlines Logo
2:05 pm - 9:50 pm
BFS
-
LHR
7h 45m
1 stop
$765Multiple Airlines
Fri, Aug 14 - Fri, Aug 21

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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 18, 2026.
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

Cheapest round-trip

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Mon 8/31

3:10 pm-8:55 pm

2 stops5h 45m

Belfast Intl

Mon 9/7

9:10 am-8:05 pm

1 stop10h 55m

$353
Quickest round-trip

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Fri 8/14

2:20 pm-9:45 pm

2 stops7h 25m

Belfast Intl

Fri 8/21

2:05 pm-9:50 pm

1 stop7h 45m

$765
Cheapest one-way

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Thu 8/6

3:00 pm-3:05 pm

1 stop24h 05m

$121

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Tue 11/10

8:50 pm-8:55 pm

2 stops24h 05m

$132

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Tue 8/25

6:10 pm-7:05 am

2 stops12h 55m

$145

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Sun 9/13

2:35 pm-11:05 pm

2 stops8h 30m

$155

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Wed 8/12

9:55 am-10:30 pm

2 stops12h 35m

$159

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Mon 8/10

3:50 pm-8:05 am

2 stops16h 15m

$160

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Tue 8/18

12:00 pm-11:05 pm

2 stops11h 05m

$164

LondonBelfast

LHR - BFS

LHRBFS

London Heathrow

Mon 8/24

8:50 pm-9:50 am

2 stops13h 00m

$165

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
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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 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 November is, on average, the cheapest month to fly to Belfast Intl Airport from London Heathrow Airport, with most prices found around $153. If you’re not able to fly to Belfast Intl Airport in November, then March is your next best option. Flight prices from London Heathrow Airport to Belfast Intl Airport during March average around $178.

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 Monday 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 Sunday, 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 $159.

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

In the evening 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 $141. Flying to Belfast Intl Airport in the evening 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 $210.

How far in advance should I book a flight from London Heathrow Airport 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 $196 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 $139 on momondo.

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

As of July 2026, prices for London Heathrow Airport to Belfast Intl Airport flights are approximately 0% 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

Fastest flight time

1h 20m

Direct flights

None
The fastest flight from London Heathrow Airport to Belfast Intl Airport takes 1h 20m
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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Frequently asked questions about flying from London Heathrow Airport to Belfast Intl Airport

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

    The straight-line distance from London Heathrow to Belfast Intl is 324.6 mi. 1h 20m 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 $129Free CancellationRating
6.7
8,124 reviews
Search British Airways flights

Traveling to a place near Belfast?

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