London to Shannon
London to Shannon is cheapest in September. August, the most expensive month we measured, costs about 42 € more.
London to Shannon is 623 km flown direct. Every fare we measured came from Ryanair.
That comes from pricing 329 departure dates across 12 months. Every figure below is a fare we measured on the day shown, not a live quote. When we have nothing fresh to say about a route, its page stops existing.
What is a good price from London to Shannon?
Anything at or below the quarter mark beats three in four of the 329 one-way fares we measured here. Above the median, wait or move the date.
seen 17 Aug 2026
How far ahead do the cheap fares sit?
When we measured, the cheapest quarter of fares sat between 50 and 144 days before departure, closer in than the market as a whole. The cheap fares were on nearer dates, not months away, when we looked.
a snapshot of where the cheap seats sat, seen 17 Aug 2026
Which day of the week is cheapest?
On average, Wednesday departures came out lowest and Sunday highest, a spread of about 26 €. The day matters less than the month here: pick the month first, then the day.