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Route Reliability

Atlanta → Washington

ATL–IAD · 534 miles · Hartsfield–Jackson Atlanta International Airport to Washington Dulles International Airport

72
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
15 min
Average arrival delay
2.2%
Cancelled
4,045
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines82%1,220 flights
  2. 2.Delta Air Lines78%2,217 flights
  3. 3.Frontier Airlines62%608 flights

What the data says

Morning flights do better here.

ATL–IAD flights departing between 3–6 AM arrived on time 93% of the time, versus 64% between 9 PM–12 AM.

Friday is doing you no favors.

ATL–IAD flights arrived on time 80% of the time on Thursdays. On Fridays: 71%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 82% of the time on this route; Frontier Airlines managed 62%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon76%(607 flights)
  • Tue78%(534 flights)
  • Wed80%(523 flights)
  • Thu80%(601 flights)
  • Fri71%(600 flights)
  • Sat79%(484 flights)
  • Sun73%(601 flights)
On-time by departure window
  • 3–6 AM93%(199 flights)
  • 6–9 AM86%(355 flights)
  • 9 AM–12 PM84%(734 flights)
  • 12–3 PM77%(1000 flights)
  • 3–6 PM67%(445 flights)
  • 6–9 PM75%(631 flights)
  • 9 PM–12 AM64%(586 flights)
On-time trend by month
81%
May

Jun 66% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%345
July 202563%337
August 202575%346
September 202584%333
October 202583%361
November 202577%332
December 202571%328
January 202676%268
February 202686%257
March 202673%294
April 202685%350
May 202681%399

Same trip, other airports

Keep nerding

Based on 4,045 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.