Route reliability
Chicago (ORD) to Raleigh/Durham (RDU): which airline is most on time?
On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Chicago, IL (ORD) to Raleigh/Durham, NC (RDU), September 2025 to August 2026.
Chicago, ILRaleigh/Durham, NC
Route at a glance · September 2025 to August 2026
ORD to RDU
Chicago, IL to Raleigh/Durham, NC
- On time
- 71.2%vs 75.6% U.S. average Worse than average
- Cancelled
- 2.3%vs 1.9% U.S. average Worse than average
- 60+ min late
- 10.8%vs 8.1% U.S. average Worse than average
- Scheduled flights
- 3,742in 12 months7 airlines
- Most reliable airline
- Envoy Air76.3% on time · 519 flights
On time less often than the U.S. average, with more cancellations.
Airlines on this route
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Diverted | Flights |
|---|---|---|---|---|---|---|
| 1. SkyWest Airlines Operating carrier; sold as United Express, Delta Connection, American Eagle, Alaska Small sample (under 300 flights) | 78.6% | 1.9% | 3.2% | 52 min | 0.0% | 154 |
| 2. Envoy Air Operating carrier; sold as American Eagle Most reliable | 76.3% | 1.9% | 6.0% | 52 min | 0.0% | 519 |
| 3. United Airlines | 74.7% | 1.2% | 9.3% | 77 min | 0.0% | 1,296 |
| 4. Republic Airways Operating carrier; sold as American Eagle, Delta Connection, United Express | 72.5% | 3.2% | 9.2% | 72 min | 0.2% | 1,153 |
| 5. Frontier Airlines Small sample (under 300 flights) | 60.2% | 4.1% | 18.4% | 142 min | 0.0% | 98 |
| 6. American Airlines | 54.6% | 3.3% | 23.5% | 112 min | 0.0% | 520 |
| PSA Airlines Operating carrier; sold as American Eagle | Insufficient sample (fewer than 50 flights) | 2 | ||||
On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.
What this means
Envoy Air has the strongest record on this route.
- Envoy Air had the best on-time record from Chicago (ORD) to Raleigh/Durham (RDU): 76.3% of its 519 scheduled flights arrived within 15 minutes of schedule, compared with 54.6% for American Airlines.
- SkyWest Airlines (78.6% on 154 flights) scored higher but flew the route far less often, so that result is less certain.
- PSA Airlines also flew this route but with fewer than 50 reported flights, too few to rate.
- 2.3% of flights on this route were cancelled (about 1 in 43), about the same as the U.S. average of 1.9%.
- 10.8% of flights, about 1 in 9, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 82 min.
- Overall, 71.2% of flights on this route arrived on time, 4.4 points lower than the U.S. average of 75.6%.
- Over the last 3 years, November was the most reliable month on this route (82.4% on time) and July the least reliable (66.1%).
- Cancellations peaked in January, when 4.3% of flights were cancelled.
- Flights scheduled to depart 8 am to 9 am were the most punctual (86.6% on time); flights scheduled to depart 8 pm to 9 pm were the least (48.2%).
- In the other direction, Raleigh/Durham (RDU) to Chicago (ORD), 71.9% of flights were on time and 2.8% were cancelled. Compare airlines RDU to ORD.
Best and worst months to fly ORD to RDU
Share of scheduled flights on time 12-month average 71.2%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 72.5% | 691 |
| February | 79.7% | 671 |
| March | 73.4% | 816 |
| April | 76.8% | 858 |
| May | 77.2% | 946 |
| June | 70.3% | 864 |
| July | 66.1% | 899 |
| August | 68.3% | 924 |
| September | 81.2% | 798 |
| October | 81.9% | 872 |
| November | 82.4% | 820 |
| December | 77.3% | 793 |
| Airline | Best month | Worst month |
|---|---|---|
| Envoy Air | October (90.8%) | July (71.4%) |
| United Airlines | October (85.5%) | July (63.7%) |
| Republic Airways | May (85.8%) | January (70.7%) |
| American Airlines | November (80.4%) | August (43.3%) |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 81.6% | 266 |
| Oct 2025 | 74.1% | 328 |
| Nov 2025 | 71.8% | 308 |
| Dec 2025 | 66.0% | 291 |
| Jan 2026 | 65.9% | 232 |
| Feb 2026 | 75.0% | 244 |
| Mar 2026 | 65.5% | 316 |
| Apr 2026 | 69.4% | 356 |
| May 2026 | 80.2% | 374 |
| Jun 2026 | 73.1% | 327 |
| Jul 2026 | 66.3% | 341 |
| Aug 2026 | 66.0% | 359 |
Best and worst departure times
Share of scheduled flights on time
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | Insufficient sample | 5 |
| Departing 6 am to 7 am | 84.6% | 130 |
| Departing 7 am to 8 am | 82.9% | 299 |
| Departing 8 am to 9 am | 86.6% | 277 |
| Departing 9 am to 10 am | 82.3% | 434 |
| Departing 10 am to 11 am | 76.9% | 281 |
| Departing 11 am to noon | 76.6% | 201 |
| Departing noon to 1 pm | 64.0% | 89 |
| Departing 1 pm to 2 pm | 67.8% | 230 |
| Departing 2 pm to 3 pm | 73.0% | 500 |
| Departing 3 pm to 4 pm | 75.0% | 92 |
| Departing 4 pm to 5 pm | 57.3% | 82 |
| Departing 5 pm to 6 pm | 52.6% | 137 |
| Departing 6 pm to 7 pm | 60.1% | 496 |
| Departing 7 pm to 8 pm | 76.1% | 92 |
| Departing 8 pm to 9 pm | 48.2% | 340 |
| Departing 9 pm to 10 pm | 70.4% | 54 |
| Departing 11 pm to midnight | Insufficient sample | 3 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Nonstop scheduled flights from Chicago, IL (ORD) to Raleigh/Durham, NC (RDU), one direction. Airlines that report to the DOT only.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.