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4 nonstop · ranked by overall best · 3 hidden by your Most reliable time setting (they leave at other times of day)
Most reliable time: morning departures (5–11 AM), the window with the best on-time odds for this trip. Turn off “Most reliable” under Departure time in Advanced settings to see every time.
Fares seen on this date: any route from 220 (recent searches, one way, per person; each card opens the live price)
1 matching trip
Why this is our top pick
- This morning flight leaves in the most reliable time of day on this route: its best departures have an 88% reliability rating vs 73% for afternoon departures.
- Legroom was comparable across the flights we compared (30 in), so it didn't set them apart.
Aircraft and legroom reflect the planes each flight has flown recently. Airlines can swap planes and seat maps change, so check the airline’s seat map when you book.
ATL → GPT
Atlanta to Gulfport: 1,316 nonstop flights a year
On time (12 months)
82%
Cancelled
1.7%
avg delay 12 min
Best time to leave
Before 9 AM
95% on time vs 74% 3 to 6 PM
Most reliable airline
Delta
80% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines80%
1,316 flights · 82% on time as flown · 1.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM95%
141 flights · avg delay 3 min
- 9 AM to noon86%
211 flights · avg delay 10 min
- Noon to 3 PM83%
330 flights · avg delay 11 min
- 3 to 6 PM74%
269 flights · avg delay 18 min
- After 9 PM80%
365 flights · avg delay 14 min
Best day: Wednesday (88%). Worst: Sunday (79%).
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