Historical on-time performance
Atlanta to Washington
534 miData through May 2026Source: US DOT · BTS
Flights on ATL–IAD arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled2.2%of scheduled flights
based on 3,910 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time80%Medianon timep9045 minCancel0.6%Flights1,085
- Delta Air LinesOn-time74%Medianon timep9050 minCancel2.9%Flights2,217
- Frontier AirlinesOn-time60%Medianon timep90105 minCancel2.6%Flights608
Why flights run late
Delay causes
- Airline40%
- Weather6%
- Air traffic (NAS)19%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline64%
- Weather33%
- Air traffic (NAS)2%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 87 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ATL → IAD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 86% on time.
- Mornings86% on time · p90 20 min · 2,915 flights
- Middays82% on time · p90 35 min · 1,672 flights
- Evenings76% on time · p90 60 min · 2,173 flights
- Afternoons73% on time · p90 55 min · 2,585 flights
- Overnights69% on time · p90 75 min · 1,536 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 82% on time.
- Wednesdays82% on time · p90 40 min · 1,493 flights
- Tuesdays81% on time · p90 40 min · 1,500 flights
- Thursdays79% on time · p90 40 min · 1,628 flights
- Saturdays79% on time · p90 45 min · 1,380 flights
- Mondays77% on time · p90 45 min · 1,635 flights
- Fridays74% on time · p90 50 min · 1,651 flights
- Sundays73% on time · p90 60 min · 1,594 flights
Keep exploring