SNN to LGW flight delays
211 flights · January 2025 – August 2026 · UK Civil Aviation Authority
90.05%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
5 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. LGW to SNN arrives on time 9.5 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Shannon to London are among the most dependable in the record. A route this punctual is usually a short hop between airports with slots to spare.
Only Ryanair flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 211 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
Which airline should you fly on this route?
Over January 2025 – August 2026, Ryanair arrived on time most often on SNN to LGW. Flights ran closest to schedule in May and worst in January.
Every airline on SNN to LGW
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Ryanair | 211 | 90.05% | 0% | — | A |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
LGW to SNN London back to Shannon 80.57% on time BCommon questions
Are flights from Shannon to London usually delayed?
90.05% of flights on the SNN to LGW route arrived within 15 minutes of schedule, so roughly 1 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Shannon to London?
Only Ryanair appears in the published record on this route, with 211 flights and 90.05% arriving on time.
How often are SNN to LGW flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
What is the best month to fly Shannon to London?
May, when 93.5% of flights arrived on time. The worst was June at 83.3%.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SNN to LGW during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →