Route on-time record
GPT to ATL: most on-time flights and the best time to fly
Gulfport (Gulfport Biloxi International Airport) to Atlanta (Hartsfield Jackson Atlanta International Airport). 1,316 nonstop flights in Jun 2025 to May 2026, 87% arrived within 15 minutes and 1.7% were cancelled. The most reliable flight number was Delta 3155 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
GPT → ATL
Gulfport to Atlanta: 1,316 nonstop flights a year
On time (12 months)
87%
Cancelled
1.7%
avg delay 15 min
Best time to leave
Before 9 AM
92% on time vs 77% 6 to 9 PM
Most reliable airline
Delta
86% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Delta 3155
6:00 AM → 8:27 AM1h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 94%
- Cancelled
- 2.9%
- Avg arrival delay
- 8 min
- Arrived on time 94% of the time (164 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 6 to 9 PM: 77%).
Moderate track record · 164 flights
Find Delta 3155 fares Opens this date on Aviasales#2 · Delta 3199
9:48 AM → 12:10 PM1h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 91%
- Cancelled
- 3.9%
- Avg arrival delay
- 13 min
- Arrived on time 91% of the time (148 flights, Jun 2025 to May 2026).
- Cancelled 3.9% of the time (6 of 154).
- 56% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 148 flights
Find Delta 3199 fares Opens this date on Aviasales#3 · Delta 2718
2:40 PM → 5:02 PM1h 24m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.6%
- Avg arrival delay
- 12 min
- Arrived on time 86% of the time (305 flights, Jun 2025 to May 2026).
- Lands inside ATL's trouble window: 59% of its 96 ground stops and delay programs started between 1 PM and 7 PM.
- 66% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 305 flights
Find Delta 2718 fares Opens this date on Aviasales#4 · Delta 3063
5:57 PM → 8:28 PM1h 31m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 77%
- Cancelled
- 2.2%
- Avg arrival delay
- 10 min
- Arrived on time 77% of the time (88 flights, Jun 2025 to May 2026).
- 76% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 88 flights
Find Delta 3063 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines86%
1,316 flights · 87% on time as flown · 1.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
365 flights · avg delay 19 min
- 9 AM to noon90%
350 flights · avg delay 11 min
- Noon to 3 PM85%
241 flights · avg delay 14 min
- 3 to 6 PM86%
173 flights · avg delay 8 min
- 6 to 9 PM77%
187 flights · avg delay 26 min
Best day: Tuesday (91%). Worst: Sunday (85%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)52%
- Late-arriving aircraft37%
- Air traffic control and airport volume7%
- Severe weather4%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
GPT to ATL questions
- What time of day is best to fly GPT to ATL?
- Before 9 AM: 92% of flights arrived on time, against 77% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from GPT to ATL?
- Delta, with a season-adjusted 86% chance of operating and arriving on time over 1,316 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on GPT to ATL?
- June (79% on time); the best was October (95%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from GPT
Live status: FAA delays and ground stops