Cheap flights from Northern Ireland to London from £25

The cheapest month to fly to London Gatwick Airport from Northern Ireland is in January. Flight prices, which tend to average around £65, are often lower during this time because this is during the off-season. If you don’t want to visit London Gatwick Airport in January, then you should wait until February to fly from Northern Ireland, when ticket prices are also cheap, with an average price of £72.

According to our data, Thursday is the cheapest day to fly to London Gatwick Airport from Northern Ireland. The lowest ticket price found for a Thursday departure recently was £94. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Northern Ireland to London Gatwick Airport on a Sunday will generally be more expensive and average around £169. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our data shows that the cheapest Northern Ireland to London Gatwick Airport flights are usually those with departure times in the evening. Our users have found flights to London Gatwick Airport in the evening for as low as £91. In contrast, the most expensive time of day to depart to London Gatwick Airport is in the afternoon when prices are around £150.

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

You are more likely to see cheaper flights to London Gatwick Airport from Northern Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to London Gatwick Airport for around £95 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Gatwick Airport from Northern Ireland for as low as £70 on momondo.

There is only 1 cabin class available to choose from on Northern Ireland to London Gatwick flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of April 2026, 3 flights take off from Northern Ireland and land in London Gatwick Airport each day. The most common flight departure time for this route is 07:00, with 59% of daily flights taking off at midday.

The number of flights available between Northern Ireland and London Gatwick Airport is 27 per week as of April 2026. The most frequent departure day is Fri, with 33% of weekly flights leaving on this day.