CGN to STN flight delays
Köln (Cologne) (CGN) London (STN)
1,365 flights · March 2025 – August 2026 · UK Civil Aviation Authority
73.15%
Arrived on time
Within 15 minutes of schedule
0.15%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
16 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Ryanair UK arrived on time 11.1 points more often than Ryanair over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In April it ran 33.6 points more punctual than in September — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The route has been getting better. The later months in the record run 8.8 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
Flights from Köln (Cologne) to London run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over March 2025 – August 2026, Ryanair UK arrived on time most often on CGN to STN. Ryanair was late most often. Flights ran closest to schedule in December and worst in September.
Every airline on CGN to STN
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 | 1,222 | 71.99% | 0.08% | — | C |
| Ryanair UK | 143 | 83.1% | 0.7% | — | B |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
STN to CGN London back to Köln (Cologne) 69.7% on time DOther routes from Köln (Cologne)
Common questions
Are flights from Köln (Cologne) to London usually delayed?
73.15% of flights on the CGN to STN route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airline is most on time from Köln (Cologne) to London?
Ryanair UK, at 83.1% on time across 143 flights. The least punctual on the route was Ryanair at 71.99%.
How often are CGN to STN flights cancelled?
0.15% of scheduled flights did not operate — about 2 in every thousand. That is in the normal range.
What is the best month to fly Köln (Cologne) to London?
April, when 86.4% of flights arrived on time. The worst was September at 52.8%.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on CGN to STN during March 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 →