Routes › Chicago (ORD) › ORD to STT
Route · 12 months to July 2026
Chicago to Charlotte Amalie: on-time record
Chicago O'Hare International to Cyril E King
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live flight status.
69.0% of scheduled ORD to STT flights arrived on time in the 12 months to July 2026. The figure covers 255 flights between Chicago and Charlotte Amalie by carriers that report to BTS, a distance of 2,116 miles.
That is 7.0 points below the national on-time share of 76.0% for the same period and level with the 69.4% recorded for all departures from ORD. Flights that did arrive were 11.6 min late on average, and 1.2% of scheduled flights were cancelled (national: 1.8%).
2 reporting carriers flew the route at least 60 times. United Airlines had the highest on-time share at 69.0% of 155 flights; American Airlines had the lowest at 69.0% of 100.
The on-time share is down 17.5 points on the previous 12 months (86.5%); cancellations moved from 0.8% to 1.2%.
Of the delay minutes that carriers assigned to a BTS cause category on this route, national aviation system 37%, air carrier 33% and late-arriving aircraft 23%.
- On time 69.0%
- Arrived 15+ minutes late 29.0%
- Cancelled 1.2%
- Diverted 0.8%
Airlines on the route compared
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 155 | 61% | 69.0% | 9.7 min | 1.3% |
| AA American Airlines | 100 | 39% | 69.0% | 14.5 min | 1.0% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | ORD to STT | All departures from ORD | All arrivals at STT | All reported flights |
|---|---|---|---|---|
| Arrived on time | 69.0% | 69.4% | 75.7% | 76.0% |
| Arrived 15+ minutes late | 29.0% | 27.5% | 22.4% | 21.9% |
| Cancelled | 1.2% | 2.8% | 1.5% | 1.8% |
| Diverted | 0.8% | 0.3% | 0.4% | 0.3% |
| Average arrival delay | 11.6 min | 15.0 min | 7.1 min | 8.1 min |
| Delay minutes per 100 flights | 1,808 | 2,252 | 1,503 | 1,684 |
| Scheduled flights | 255 | 359,911 | 5,547 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, STT to ORD, recorded 67.1% on time across 255 flights in the same period.
Month by month
Year on year: on time 69.0% against 86.5% (−17.5 pts), cancelled 1.2% against 0.8%, flights 255 against 126.
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| Jan | 85 | 76.5% | 2.4% | 6.6 min | 3 |
| Feb | 75 | 82.7% | 0.0% | 1.8 min | 3 |
| Mar | 120 | 68.3% | 0.8% | 11.0 min | 3 |
| Apr | 52 | 75.0% | 0.0% | 2.4 min | 3 |
| May | 14 | 85.7% | 0.0% | -4.4 min | 3 |
| Jun | 13 | 92.3% | 0.0% | 3.7 min | 3 |
| Jul | 12 | 75.0% | 0.0% | 4.4 min | 3 |
| Aug | 12 | 66.7% | 8.3% | 6.8 min | 3 |
| Sep | 1 | 100.0% | 0.0% | -24.0 min | 1 |
| Oct | 3 | 100.0% | 0.0% | -11.3 min | 3 |
| Nov | 31 | 87.1% | 0.0% | -0.5 min | 3 |
| Dec | 80 | 83.8% | 0.0% | -4.8 min | 3 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Other routes from Chicago (ORD)
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| ORD–LGA | Chicago to New York | 11,611 | 63.5% | 19.6 min | 5.1% |
| ORD–BOS | Chicago to Boston | 7,755 | 65.6% | 18.3 min | 3.0% |
| ORD–DCA | Chicago to Washington | 7,042 | 67.5% | 17.5 min | 3.0% |
| ORD–LAX | Chicago to Los Angeles | 7,023 | 71.9% | 12.5 min | 1.4% |
| ORD–DFW | Chicago to Dallas/Fort Worth | 6,997 | 67.8% | 17.2 min | 2.9% |
| ORD–ATL | Chicago to Atlanta | 6,442 | 73.4% | 11.2 min | 2.3% |
| ORD–MSP | Chicago to Minneapolis | 6,344 | 68.3% | 17.8 min | 2.6% |
| ORD–MCO | Chicago to Orlando | 6,272 | 71.4% | 12.8 min | 1.6% |
All 193 routes and the airport record for ORD · airport record for STT
Questions and answers
How often are flights from Chicago to Charlotte Amalie on time?
69.0% of the 255 flights scheduled from ORD to STT in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from ORD to STT?
Among reporting carriers with at least 60 flights on the route, United Airlines had the highest on-time share (69.0%), followed by American Airlines (69.0%). Differences of a point or two on a few hundred flights are small.
What causes delays between Chicago and Charlotte Amalie?
For flights that arrived 15 or more minutes late, carriers attributed the delay minutes as follows: national aviation system 37%, air carrier 33%, late-arriving aircraft 23%, extreme weather 7%, security 2%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from ORD?
Too few departure hours carry enough flights on this route to compare them.
Is it getting better?
The on-time share for the 12 months to July 2026 was 69.0%, down 17.5 points on the previous 12 months (86.5%). The monthly chart on this page shows each of the last 36 months.
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.