Cheap flights from Belfast Intl Airport to London from £18

The cheapest month to fly to London from Belfast Intl Airport is in February. Flight prices, which tend to average around £13, are often lower during this time because this is during the off-season. The month of December is another great option to travel to London, with average flight prices from Belfast Intl Airport averaging around £15.

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 £71. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Belfast Intl Airport to London for around £87.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £117. Flights in the afternoon are often more expensive, with an average ticket price of £608.

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

You are more likely to see cheaper flights to London from Belfast Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London 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 from Belfast Intl Airport for as low as £100 on momondo.

No. A direct flight is the cheapest option for a flight between Belfast Intl Airport to London.

As of May 2026, prices for Belfast Intl Airport to London flights are approximately 42% more expensive when compared to flights at the same time last year.

Ryanair and easyJet are the most popular carriers operating from Belfast Intl to London

easyJet, British Airways and Ryanair are the top three most popular airlines that fly to London from Belfast Intl Airport according to our data. easyJet is the first choice among our users, with 59% of people opting to fly with this airline when travelling to London. Keep in mind that there are 3 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between Belfast and London have experienced a delay on any given week. The average delay length over the past 12 months has been 105 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Ryanair have had the fewest delays on this route over the last 12 months, with about 12% of their flights experiencing any sort of delay.

5 flights are operational daily from Belfast Intl Airport to London as of May 2026. The most popular departure time for this route is 20:00, with 46% of flights per day taking off at midday.

As of May 2026, there are 36 flights per week flying from Belfast Intl Airport to London. The most common day of the week flights depart is Mon, with 33% of flights taking off on this day.