How reliable is St. Mary's Airport?
Flights from ISC avoided significant airline-controlled delay in 100% of 1 flights in official UK CAA history. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Origin-airport operations
What the airline-controlled delay record at ISC looks like
Avoided 15+ min controlled delay
across 1 flights
Source: UK CAA. Origin-grouped, cause-attributed operational history; it is not a direct departure-punctuality measure or a guarantee for any flight.
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Weather by month
Weather history isn’t available for ISC yet
PlaneSane shows month-by-month airport weather once enough historical METAR/IEM observations are loaded for the airport. This does not mean the airport has no weather data forever; it means the current climatology table has no monthly coverage for St. Mary's Airport.
The read on ISC
What the numbers say about flying through St. Mary's Airport
Across official performance history, flights from ST MARY\'S avoided significant airline-controlled delay about 100% of the time over 1 flights. That's one of the more dependable operational records you'll see. Pair it with a low cancellation rate of 0.0%, so flights here rarely vanish outright. When a departure does run late, the typical delay is around 0 minutes.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to ST MARY\'S, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about ISC
- How reliable is St. Mary's Airport (ISC)?
- Flights from ST MARY\'S avoided significant airline-controlled delay roughly 100% of the time across 1 flights of official history — one of the more dependable operational records you'll see. The cancellation rate runs about 0.0%. It's advisory context, not a guarantee for any single flight.
Planning a trip through ST MARY\'S?
Score real flights to and from ISC on reliability, weather, and connection safety — not just price.