Route · IAD → STT · 2020–2025 BTS data
Washington to Charlotte Amalie
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAD to STT (Washington to Charlotte Amalie) ranks #4382 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 87.4%
- On-time
- +8.4 pts
- vs US avg
- 56 min
- Delay when late
- 1,158
- Flights
- #4382 of 4927
- Corpus placement
Cancelled
0.3%
Best Month
N/A
Worst Month
N/A
Distance
1,606 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 45 | 5 | 0 | 0 | UA |
| Nov 2025 | 30 | 5 | 0 | 0 | UA |
| Jul 2025 | 31 | 7 | 0 | 0 | UA |
| Jun 2025 | 30 | 3 | 0 | 0 | UA |
| May 2025 | 31 | 6 | 0 | 0 | UA |
| Apr 2025 | 30 | 2 | 0 | 0 | UA |
| Mar 2025 | 31 | 3 | 0 | 0 | UA |
| Jan 2025 | 31 | 5 | 0 | 0 | UA |
| Dec 2024 | 31 | 5 | 0 | 0 | UA |
| Nov 2024 | 30 | 1 | 0 | 1 | UA |
| Jul 2024 | 35 | 8 | 0 | 0 | UA |
| Jun 2024 | 35 | 3 | 0 | 0 | UA |
| May 2024 | 32 | 5 | 0 | 1 | UA |
| Apr 2024 | 30 | 0 | 0 | 0 | UA |
| Mar 2024 | 31 | 2 | 0 | 0 | UA |
| Jan 2024 | 31 | 7 | 0 | 0 | UA |
| Dec 2023 | 31 | 2 | 0 | 0 | UA |
| Nov 2023 | 30 | 0 | 0 | 0 | UA |
| Jul 2023 | 31 | 5 | 1 | 0 | UA |
| Apr 2023 | 30 | 2 | 0 | 0 | UA |
| Mar 2023 | 31 | 1 | 0 | 0 | UA |
| Jan 2023 | 31 | 3 | 1 | 0 | UA |
| Dec 2022 | 31 | 5 | 0 | 0 | UA |
| Nov 2022 | 30 | 1 | 0 | 0 | UA |
IAD–STT seasonal on-time pattern
Best: April (95.8%) · weakest: August (67.7%)
Strongest calendar month
April
95.8% on-time · ~30 flights/mo
Busiest calendar month
December
~34 flights/mo avg
Weakest calendar month
August
67.7% on-time · ~31 flights/mo
Cancellation Rate
0.3%
2 of 759 flights
Diversion Rate
0.3%
2 of 759 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profileSTT - Charlotte Amalie
Full on-time, delay-cause, and seasonal performance for Charlotte Amalie, VI.
STT on-time profileCompare the two airports
See IAD and STT side by side on delays, cancellations, and reliability.
Compare IAD vs STTOrigin-hub reliability standing
Among IAD's stronger departures
IAD → STT posts a 87.4% on-time rate, landing in the ≥85% band with 14 of 58 BTS-tracked routes leaving Washington. The same hub also shows 42 mid-band and 2 challenged departures · fleet-wide on-time rank #535 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAD–STT.
Routes with a similar on-time rate
What the Data Says About IAD to STT
Washington to Charlotte Amalie (IAD to STT) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.4% on-time rate across 1,158 flights, with delays that do happen averaging 55.7 minutes. The corridor runs roughly 1,606 miles and is served by 1 carrier. Over the most recent 24 months, 2 of 759 flights were cancelled (0.3%) and 2 diverted (0.3%).
Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.
On the multi-year calendar, IAD–STT peaks in April at 95.8% on-time while December carries the heaviest traffic (~34 flights per month) ; the softest month is August at 67.7%, a 28.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does IAD to STT rank among US routes by traffic? ▼
How often are flights delayed from IAD to STT? ▼
What is the cancellation rate for IAD to STT? ▼
How far is the flight from IAD to STT? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using IAD–STT data
IAD–STT runs 8.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare IAD and STT airport profiles: delay causes and top routes differ even on the same corridor. IAD airport
- If your dates flex, April (95.8% on-time) beats August (67.7%) on this corridor. Seasonal chart
- 4 other routes post a similar 87.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.