Cheap flights from Belfast to London from £49

In general, October is the cheapest month to fly from Belfast to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £34. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Belfast averaging around £36.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Belfast to London Heathrow Airport in the evening for as low as £211. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £729 on average. Flights to London Heathrow Airport from Belfast in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Belfast City to London Heathrow for the best Belfast - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Belfast when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £133 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Belfast for as low as £103 on momondo.

British Airways is the most popular carrier operating from Belfast to London Heathrow

British Airways, Loganair and easyJet are the top three most popular airlines that fly to London Heathrow Airport from Belfast according to our data. British Airways is the first choice among our users, with 93% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 3 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

As of May 2026, 7 flights take off from Belfast and land in London Heathrow Airport each day. The most common flight departure time for this route is 06:00, with 42% of daily flights taking off at midday.

The number of flights available between Belfast and London Heathrow Airport is 54 per week as of May 2026. The most frequent departure day is Tue, with 50% of weekly flights leaving on this day.