Cheap flights from Belfast to London Heathrow

Q: How much are flights normally?

£ 45. If you see flights from Belfast to London Heathrow for less than this, you've found a good deal.

Q: What are the cheapest airlines?

British Airways. These airlines usually offer the cheapest flights from Belfast to London Heathrow.

Q: Can I fly direct to London Heathrow?

British Airways. You can fly non-stop from Belfast to London Heathrow with these airlines.

Q: When is high season?

August. This is the most expensive time to fly to London Heathrow. If this is when you want to go, book your flight from Belfast in advance.

Q: When is the cheapest time to fly?

November. Flights from Belfast to London Heathrow are usually cheaper at this time of year.

Q: How long is the flight?

1 hrs 20 mins. This is the shortest flight time from Belfast to London Heathrow.

Q: How long should I stay in London Heathrow?

2 days. Most people spend this amount of time in London Heathrow.

from as little as £133

2 nights in London, departing George Best Belfast City Airport on 17 / Mar / 2025 with British Airways (price found 37 hours ago)

Subject to availability, prices correct of the last 24 hours

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Cheap return flights from Belfast to London Heathrow

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The Belfast / London Heathrow route

All 522 km of it

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London Heathrow flight facts

What you need to know

How much are flights normally?

£ 45

If you see flights from Belfast to London Heathrow for less than this, you've found a good deal.

What are the cheapest airlines?

British Airways

These airlines usually offer the cheapest flights from Belfast to London Heathrow.

Can I fly direct to London Heathrow?

British Airways

You can fly non-stop from Belfast to London Heathrow with these airlines.

When is high season?

August

This is the most expensive time to fly to London Heathrow. If this is when you want to go, book your flight from Belfast in advance.

When is the cheapest time to fly?

November

Flights from Belfast to London Heathrow are usually cheaper at this time of year.

How long is the flight?

1 hrs 20 mins

This is the shortest flight time from Belfast to London Heathrow.

How long should I stay in London Heathrow?

2 days

Most people spend this amount of time in London Heathrow.

Alternative flights from the UK to London Heathrow

Check out prices for other routes

London to London Heathrow

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Manchester to London Heathrow

from £115 pp

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Edinburgh to London Heathrow

from £115 pp

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Birmingham to London Heathrow

from £303 pp

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Belfast to London City Airport

from £181 pp

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Belfast to London Gatwick

from £73 pp

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Belfast to London Luton

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Belfast to London Stansted

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Alternative flights from Belfast

You might find cheaper flights nearby

London from Belfast Aldergrove International Airport

from £73 pp

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London from George Best Belfast City Airport

from £110 pp

Find flights

17 / Mar / 2025 is currently the lowest priced day of the year to fly the Belfast/London Heathrow route. There are around 35 flights on any given week from the UK to London Heathrow and the cheapest month to fly right now is March.

Not suitable? Try running another search or viewing all cheap flight deals.

Min / Max Temperature (°C)

LOWEST

2 °C

AVG

11 °C

HIGHEST

24 °C

Rainfall (mm)

LOWEST

38.1 mm

AVG

52.5 mm

HIGHEST

66 mm

Key facts about London Heathrow

Currency

British pound

Language

English

Timezone

0 hrs behind GMT

How to get cheap flights from Belfast to London Heathrow

Tips and advice from our flight experts

British Airways tends to have the best prices on flights from Belfast to London Heathrow. But, remember that London Heathrow is only one of the airports in London – searching for flights from ‘Belfast’ to ‘London’ will give you more options, and possibly lower prices.

There are 35 flights to or via London from Belfast. The flight normally lasts about 522 km. We've found that George Best Belfast City Airport (BHD) is the most popular airport to fly from, and British Airways is the most popular airline. But that doesn't mean they'll be the cheapest – it's best to compare all your options.

17 / Mar / 2025 is currently the cheapest date to fly from Belfast to London Heathrow. Prices can change though, so it's best to check Netflights regularly – we recommend booking at least two months in advance to get a good deal.

We don't just compare flight prices. If you need to book accommodation for your trip, or you want to hire a car to explore United Kingdom, we've got some options for you to compare. Plus, when you sort your flights and hotel in one booking, you could save even more.