Cheap flights from Belfast Intl Airport to London from $35

The cheapest month to fly to London from Belfast Intl Airport is in February. Flight prices, which tend to average around $92, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Belfast Intl Airport averaging around $94.

The cheapest day to depart from Belfast Intl Airport to London is on a Saturday. Travelers who choose to depart for London on a Saturday will often find tickets for as low as $73. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $214. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Belfast Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $131 when looking at flights departing in the evening. Flights to London are more costly in the afternoon, with an average ticket price of $1,012. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $189 when searching weeks out. 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 $155 on momondo.

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

Historically, on average around 14% 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 106 minutes.

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

Wednesday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

The number of flights available between Belfast Intl Airport and London is 3 per day as of September 2026. The most frequent departure time is 8:00PM, with 46% of daily flights leaving at noon.

As of September 2026, 21 flights take off from Belfast Intl Airport and land in London each week. The most common flight departure day for this route is Fri, with 52% of weekly flights taking off on this day.