Cheap flights from Belfast to London

October is the month when fares on this route usually dip, and the quieter weeks after the summer rush are the ones to watch. September and November sit close behind, while July and August, Christmas and Easter push prices up because everyone travels at once. Midweek departures, especially Tuesday and Wednesday, tend to be calmer and cheaper than Friday evenings or Sunday nights, when weekend traffic peaks. Book a few weeks ahead for the shoulder months; for holiday periods, earlier is better.

Several carriers serve Belfast to London, and they work in different ways. Ryanair, Ryanair UK and Easyjet keep fares low with a stripped-back ticket, so check what is included before you add extras. British Airways, BA CityFlyer, Aer Lingus, Emerald Airlines and Loganair Limited fly the route too, with fuller fares and more in the price. KLM Royal Dutch Airlines and KLM Cityhopper connect through Amsterdam instead of flying direct, which suits anyone who wants a stopover or a different arrival time. Compare the total, not the headline fare.

London has five airports on this route, and they sit at very different distances from the centre. London City is the closest, a short ride from the City and Canary Wharf, which is why it suits a day of meetings. Heathrow lies west of town, with fast trains and the Underground into the middle. Gatwick sits south of the city, with a direct train to Victoria and Thameslink services across London. Luton and Stansted are further out, each with its own express train to the centre. Allow more time than you think at the bigger airports, and check which station your onward train leaves from.

Currency

GBP (£)

Power sockets

Type G · 230 V

Language

English

Emergency number

112, 999

Calling code

+44

Internet domain

.uk

Population of London

8.8 M (2021)

Time zone

UTC+00 (Europe/London)

Country facts: Wikidata

• All Belfast departures use George Best City airport, so confirm your terminal and leave time for city traffic.
• Low-cost tickets on this route often exclude a checked bag, so add one at booking if you need it.
• If you book a KLM connection through Amsterdam, check whether both legs sit on one ticket.
• Check which photo ID your airline accepts for domestic flights and bring the document you booked with.
• October is the cheapest month, but fares climb around Christmas, Easter and school holidays.
• Landing at Luton or Stansted adds a longer transfer, so build that into your plans.