Cheap flights from Northern Ireland to London from £18

The cheapest month to fly to London from Northern Ireland is in March. Flight prices, which tend to average around £47, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Northern Ireland averaging around £49.

Our data shows that Thursday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £67. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Northern Ireland to London for around £86.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £108. Flights in the afternoon are often more expensive, with an average ticket price of £584.

Fly from Belfast Intl to London Stansted for the best Northern Ireland - London flight prices

You are more likely to see cheaper flights to London from Northern Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £127 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Northern Ireland for as low as £100 on momondo.

There are 3 cabin classes available to choose from on Northern Ireland to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

easyJet, Ryanair, and British Airways are the most popular carriers operating from Northern Ireland to London

British Airways, easyJet and Ryanair are the top three most popular airlines that fly to London from Northern Ireland according to our data. British Airways is the first choice among our users, with 54% of people opting to fly with this airline when travelling to London. Keep in mind that there are 6 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

As of February 2026, 31 flights take off from Northern Ireland and land in London each day. The most common flight departure time for this route is 06:00, with 57% of daily flights taking off at midday.

The number of flights available between Northern Ireland and London is 217 per week as of February 2026. The most frequent departure day is Mon, with 24% of weekly flights leaving on this day.