Cheap flights from London Heathrow Airport to Northern Ireland from £39

In general, May is the cheapest month to fly from London Heathrow Airport to Northern Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £17. If you’re not able to fly to Northern Ireland in May, then January is your next best option. Flight prices from London Heathrow Airport to Northern Ireland during January average around £30.

Flying to Northern Ireland from London Heathrow Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as £134 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £161 on average. Flights to Northern Ireland from London Heathrow Airport in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Northern Ireland from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Northern Ireland for around £143 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Northern Ireland from London Heathrow Airport for as low as £101 on momondo.

British Airways and Loganair are the most popular carriers operating from London Heathrow to Northern Ireland

British Airways, Loganair and easyJet are the top three most popular airlines that fly to Northern Ireland from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 87% of people opting to fly with this airline when travelling to Northern Ireland. Keep in mind that there are 4 different airlines that fly to Northern Ireland on a routine basis, so you have a few additional options to choose from.

As of May 2026, there are 20 flights per day flying from London Heathrow Airport to Northern Ireland. The most common time of day flights depart is 16:00, with 44% of flights taking off in the evening.

The number of flights available between London Heathrow Airport and Northern Ireland is 141 per week as of May 2026. The most frequent departure day is Wed, with 29% of weekly flights leaving on this day.