How reliable is McGhee Tyson Airport?
Flights from TYS departed within 15 minutes of schedule in 83% of 110,352 flights in official BTS history — and weather is calmest in Jun. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at TYS looks like
On-time departures
across 110,352 flights
Source: BTS Airport Operations · data through 2026-06-25. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
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Weather by month
When the weather works for you at Knoxville
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 95/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 84/100 favorability
The read on TYS
What the numbers say about flying through McGhee Tyson Airport
Across official performance history, flights from Knoxville left within 15 minutes of schedule about 83% of the time over 110,352 flights. That's a solid, better-than-average operational record. Pair it with a moderate cancellation rate of 2.0%. When a departure does run late, the typical delay is around 11 minutes.
On weather, Knoxville is an unusually calm-weather airport year-round. June is the calmest stretch for flying, scoring 95 out of 100 for favorable conditions, while January is the most disruptive at 84, driven mainly by low visibility & fog and snow. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Knoxville, 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 TYS
- How reliable is McGhee Tyson Airport (TYS)?
- Flights from Knoxville left within 15 minutes of schedule roughly 83% of the time across 110,352 flights of official history — a solid, better-than-average operational record. The cancellation rate runs about 2.0%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from TYS for good weather?
- June has the calmest flying weather at McGhee Tyson Airport. January is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Knoxville?
Score real flights to and from TYS on reliability, weather, and connection safety — not just price.