Best Time to Fly GPT to ATL: On-Time Stats by Hour & Airline
Gulfport-Biloxi International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
1,317 flights were scheduled from Gulfport/Biloxi (GPT) to Atlanta (ATL) in the last 12 months, and 87.3% of those that flew arrived on time, 9.7 points above the US average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (91% on time) and May the worst month (81%).
The cancellation rate was 1.6% (US average 1.8%).
GPT 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 | 87.3% | 101 min | 1.6% | 1,317 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GPT to ATL
On-time arrival % by scheduled departure hour (local time), 2,628 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 91.6% | 1.8% | 730 |
| 9am–10am | 94.4% | 1.4% | 146 |
| 10am–11am | 91.4% | 1.9% | 520 |
| 11am–12pm | 82.0% | 0.0% | 39 |
| 12pm–1pm | 94.7% | 0.0% | 38 |
| 1pm–2pm | 80.4% | 0.0% | 148 |
| 2pm–3pm | 85.8% | 0.4% | 269 |
| 3pm–4pm | 90.7% | 2.9% | 102 |
| 4pm–5pm | 83.3% | 0.0% | 42 |
| 5pm–6pm | 82.5% | 1.8% | 221 |
| 6pm–7pm | 79.2% | 1.3% | 303 |
| 7pm–8pm | 82.3% | 1.4% | 70 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on GPT 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) | 85.4% | -3.3 pts | 0.0% | 48 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.3% | -6.4 pts | 1.2% | 80 |
| Summer peak (Jun 15 - Aug 15) | 85.0% | -3.7 pts | 1.3% | 469 |
| All other days | 88.7% | — | 1.5% | 2,031 |
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).