Best Time to Fly PDX to ATL: On-Time Stats by Hour & Airline
Portland International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
1,551 flights were scheduled from Portland (PDX) to Atlanta (ATL) in the last 12 months, and 88.5% of those that flew arrived on time, 10.9 points above the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 90.8% on time and Alaska Airlines was last with 78.5%.
Over 24 months, Thursday was the most reliable day (89% on time) and July the worst month (76%).
The cancellation rate was 1.0% (US average 1.8%).
PDX to ATL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 90.8% | 62 min | 1.0% | 1,264 |
| Alaska Airlines | 78.5% | 36 min | 0.7% | 286 |
| American Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PDX to ATL
On-time arrival % by scheduled departure hour (local time), 3,048 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 95.2% | 0.8% | 658 |
| 7am–8am | 76.6% | 0.5% | 435 |
| 9am–10am | 60.0% | 0.0% | 50 |
| 10am–11am | 64.8% | 0.0% | 105 |
| 11am–12pm | 85.0% | 0.6% | 485 |
| 12pm–1pm | 86.6% | 0.4% | 280 |
| 1pm–2pm | 91.0% | 1.5% | 68 |
| 2pm–3pm | 91.2% | 0.8% | 263 |
| 9pm–10pm | 91.1% | 0.9% | 217 |
| 10pm–11pm | 90.0% | 0.3% | 321 |
| 11pm–12am | 78.7% | 1.2% | 166 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PDX to ATL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 83.6% | -5.0 pts | 0.0% | 61 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.9% | -4.7 pts | 0.0% | 112 |
| Summer peak (Jun 15 - Aug 15) | 78.9% | -9.8 pts | 0.9% | 656 |
| All other days | 88.7% | — | 0.6% | 2,219 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).