BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
STTIAD

Charlotte Amalie, VI (STT) to Washington, DC (IAD) flight delay odds

Historically, 80.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 332 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
80.1%arrived on time
11.1%30+ min late
1.8%cancelled
332scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.6%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted1.5%did not reach as scheduled
Average arrival-2.0 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Afternoon31280.1%10.9%1.6%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday4684.8%10.9%0.0%
Tuesday4582.2%8.9%0.0%
Wednesday4472.7%13.6%0.0%
Thursday4586.7%8.9%0.0%
Friday4586.7%8.9%0.0%
Saturday6180.3%9.8%4.9%
Sunday4667.4%17.4%6.5%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines33280.1%11.1%1.8%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 20253180.6%9.7%0.0%
August 20252065.0%5.0%10.0%
September 2025475.0%0.0%0.0%
October 20251090.0%0.0%0.0%
November 20253090.0%10.0%0.0%
December 20254588.9%8.9%0.0%
January 20263666.7%19.4%11.1%
February 20262875.0%17.9%0.0%
March 20263177.4%16.1%0.0%
April 20263083.3%10.0%0.0%
May 20263381.8%12.1%0.0%
June 20263482.4%5.9%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline24.2%
Late aircraft57.4%
National airspace18.4%
Weather0.0%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.