ORD to TYS flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to McGhee Tyson Airport · 475 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or TYS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Knoxville (TYS) arrived on time 67% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3.7% were cancelled, and 15% arrived an hour or more late.
- Envoy Air was the most punctual airline here (75% on time); PSA Airlines was the least (60%).
- Departures scheduled around 7am did best (79% on time); around 6pm did worst (55%).
- Saturday was the most reliable day to fly (70% on time) and Monday the least (64%).
- The largest source of delay minutes was late-arriving aircraft (52%).
Which airline is most on time from ORD to TYS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 81% | 0.0% | 14 min | 8.5% | 47 |
| Envoy AirRegional airline operating American Eagle flights. | 75% | 2.4% | 13 min | 8.4% | 208 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 71% | 2.4% | 22 min | 11.5% | 878 |
| United Airlines | 65% | 1.9% | 32 min | 16.3% | 312 |
| PSA AirlinesRegional airline operating American Eagle flights. | 60% | 6.7% | 56 min | 20.5% | 743 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am79%205 flights
- 8am76%187 flights
- 9am75%198 flights
- 10am67%155 flights
- 11am76%126 flights
- 1pm64%195 flights
- 2pm69%281 flights
- 3pm66%93 flights
- 5pm61%148 flights
- 6pm55%338 flights
- 7pm59%182 flights
- 8pm71%38 flights
- 9pm61%35 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday64%6.9% cancelled
- Tuesday68%2.3% cancelled
- Wednesday68%1.9% cancelled
- Thursday68%2.8% cancelled
- Friday68%2.8% cancelled
- Saturday70%6.2% cancelled
- Sunday65%3.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft52%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion12%
- Extreme weather9%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather79%
- Air traffic control & airport congestion15%
- Airline (crew, maintenance, cleaning, fueling)6%
- Security0%
ORD to TYS: common questions
- How often are ORD to TYS flights on time?
- 67% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to Knoxville cancelled?
- 3.7% of scheduled flights were cancelled (82 of 2,188).
- How long are typical delays?
- Across all flights the average arrival delay was 33 min (early arrivals count as zero). Flights that were late arrived 99 min behind schedule on average, and 14.8% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 30 min taxiing from the gate to takeoff on average.
Related routes
Return trip: TYS to ORD — 70% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → TYS, nonstop flights by US airlines that report to the DOT. How we calculate this.