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Route Reliability

Atlanta → Portland

ATL–PWM · 1,027 miles · Hartsfield–Jackson Atlanta International Airport to Portland International Jetport

79
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
11 min
Average arrival delay
1.1%
Cancelled
641
Flights in the data

Data through May 2026.

Delta Air Lines is the only airline in this data on this route, arriving on time 76% of the time across 641 flights. No comparison to make.

What the data says

Morning flights do better here.

ATL–PWM flights departing between 9 AM–12 PM arrived on time 89% of the time, versus 62% between 3–6 PM.

Sunday scaries are real for this one.

ATL–PWM flights arrived on time 84% of the time on Mondays and just 67% on Sundays. That gap is worth planning around.

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
  • Mon84%(91 flights)
  • Tue78%(89 flights)
  • Wed76%(90 flights)
  • Thu73%(90 flights)
  • Fri80%(86 flights)
  • Sat75%(96 flights)
  • Sun67%(92 flights)
On-time by departure window
  • 9 AM–12 PM89%(210 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM62%(58 flights)
  • 6–9 PM75%(248 flights)
  • 9 PM–12 AM62%(109 flights)
On-time trend by month
86%
May

Jun 56% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%81
July 202564%90
August 202585%74
September 202590%61
October 202590%61
November 202581%58
December 202556%32
January 202687%30
February 202679%28
March 202655%31
April 202688%32
May 202686%56

Keep nerding

Based on 641 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.