Cheap flights from Belfast Intl Airport to the United Kingdom from £18

The cheapest month to fly to United Kingdom from Belfast Intl Airport is in September. Flight prices, which tend to average around £55, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of September, then departing from Belfast Intl Airport during the month October is also very affordable. Most momondo users find prices during this month for around £56.

The cheapest day to depart from Belfast Intl Airport to United Kingdom is on a Thursday. Travellers who choose to depart for United Kingdom on a Thursday will often find tickets for 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 United Kingdom for around £87.

The cheapest time of day to fly to United Kingdom is in the evening when flights can be purchased for as low as £117. Try not to purchase tickets in the afternoon because they tend to be around £609. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Belfast Intl to Manchester for the best Belfast Intl - United Kingdom flight prices

You are more likely to see cheaper flights to United Kingdom from Belfast Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom 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 United Kingdom from Belfast Intl Airport for as low as £101 on momondo.

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

easyJet, Ryanair and British Airways are the top three most popular airlines that fly to United Kingdom from Belfast Intl Airport according to our data. easyJet is the first choice among our users, with 64% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 5 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between Belfast and United Kingdom 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.

The number of flights available between Belfast Intl Airport and United Kingdom is 8 per day as of May 2026. The most frequent departure time is 08:00, with 45% of daily flights leaving at midday.

61 flights are operational weekly from Belfast Intl Airport to United Kingdom as of May 2026. The most popular departure day for this route is Thu, with 56% of flights per week taking off on this day.