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

Nashville, TN (BNA) to Washington, DC (IAD) flight delay odds

Historically, 77.0% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,011 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
77.0%arrived on time
13.6%30+ min late
1.2%cancelled
1,011scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.4%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+12.6 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
Early morning33585.4%6.3%2.4%
Afternoon36076.7%15.6%0.6%
Evening30068.0%19.3%0.7%

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
Monday14868.2%16.9%2.7%
Tuesday12780.3%14.2%0.8%
Wednesday13683.1%8.1%0.0%
Thursday16080.6%9.4%0.6%
Friday14875.0%18.9%0.7%
Saturday13380.5%14.3%0.8%
Sunday15972.3%13.8%2.5%

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 Airlines93576.6%13.6%1.3%
Allegiant Air3878.9%15.8%0.0%
Republic Airways3783.8%13.5%0.0%
Southwest Airlines1100.0%0.0%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202510163.4%19.8%3.0%
August 202510089.0%7.0%0.0%
September 20257982.3%10.1%0.0%
October 20259378.5%10.8%0.0%
November 20258871.6%21.6%0.0%
December 20257078.6%14.3%0.0%
January 20265879.3%10.3%6.9%
February 20266882.4%7.4%4.4%
March 20268766.7%24.1%1.1%
April 20268983.1%6.7%1.1%
May 20268676.7%11.6%0.0%
June 20269275.0%17.4%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.

Airline43.6%
Late aircraft40.5%
National airspace12.1%
Weather3.8%
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.