83% of flights leaving Gulfport (GPT) arrived on time over the past 12 months, 7 points better than the national average of 76%. About 12 flights leave GPT on a typical day; 2.1% were cancelled. 83% pushed back from the gate on time, so most of the lateness is already there when the flight leaves the gate.
At a glance
- Best hour to fly: 6 a.m. (90% on time). Worst: 6 p.m. (74%).
- Best month: October (89%). Worst: June (75%).
- Most reliable airline here: Delta Air Lines (85%), vs American Airlines at 82%.
- Biggest delay cause: late-arriving aircraft (45% of delay minutes).
- Year on year: improving (81% → 83%).
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for flights leaving GPT: when a flight was late, it was under 45 minutes late 44% of the time. About 1 in 15 flights landed an hour or more late, and 1 in 58 three hours or more; 2.1% were cancelled outright.
- On time or early83%
- 15–30 min late4.5%
- 30–60 min late3.4%
- 1–2 hours late3.4%
- 2–3 hours late1.5%
- 3+ hours late1.7%
- Diverted0.2%
- Cancelled2.1%
Share of all 4,561 scheduled flights, past 12 months, by arrival time against schedule.
Best time of day to fly out of GPT
Time of day matters more at GPT than almost anything else you control. Flights scheduled to leave at 6 a.m. arrived on time 90% of the time; at 6 p.m. it was 74%, a 16-point gap. Taken together, early departures (5–9 a.m.) ran 87% on time against 77% for the evening bank (5–10 p.m.). Early planes usually start the day at the airport, so they haven't had a chance to pick up delays elsewhere. By evening a late inbound aircraft, a crew running out of duty hours or an afternoon thunderstorm can push one late flight into the next.
Hour × month
Combine the two and the spread is wider still. The most reliable combination at GPT was a 2 p.m. departure in September (97% on time); the least, 2 p.m. in June (59%). If you can only move one thing, move the hour. Departure hour usually shifts the odds more than the month does.
Each cell: on-time rate for that departure hour in that calendar month, 2023–2026. Find your travel month, then look along the row for the greenest hour.
Best and worst months
June is the hardest month at GPT, with 75% of flights on time across 2023–2026; October is the best at 89%. Summer (June–August) runs 8 points worse than autumn: heavy schedules, peak loads and afternoon thunderstorms. Winter costs 5 points against autumn. Cancellations peak in January (7.9% of flights).
Airlines at GPT
American Airlines runs 47% of departures from GPT. Among airlines with at least 1,000 departures here, Delta Air Lines was the most reliable (85% on time) and American Airlines the least (82%), a 3-point difference. On a route where both fly, that difference is worth more than a small fare gap.
| Airline | Departures | On time | Left on time | Cancelled | Typical arrival |
|---|---|---|---|---|---|
| American Airlines | 2,125 | 82% | 81% | 3.0% | −13 min |
| Delta Air Lines | 1,347 | 85% | 84% | 1.6% | −13 min |
| United Airlines | 1,089 | 84% | 85% | 1.2% | −11 min |
Why flights are late at GPT
Airlines report a cause for every flight that arrives 15 or more minutes late. At GPT, 45% of delay minutes came from late-arriving aircraft: the plane showed up late from its previous flight, so the delay started somewhere else. Next is the airlines themselves at 33%. That's why the first flight of the morning is the safest bet: it has no earlier flight to inherit a delay from. Of the 97 cancellations, 69% were blamed on weather.
The average taxi from gate to takeoff is 16 minutes, about typical for a large U.S. airport.
GPT vs nearby airports
| Airport | Distance | Departures | On time | Cancelled |
|---|---|---|---|---|
| GPT Gulfport Biloxi | — | 4,561 | 83% | 2.1% |
| MOB Mobile | 53 mi | 5,818 | 83% | 1.8% |
Month by month
Over the latest 12 months 83% of GPT departures were on time, against 81% in the 12 months before, an improvement of 2 points. The best recent month was September 2025 (92%); the worst, May 2026 (79%).
Worst cancellation days
The worst single day in the past year was Sunday, Jan 25, 2026, when 67% of 12 scheduled departures were cancelled. Days like that are usually a major storm, a system outage or a holiday peak hitting bad weather. No average predicts them, so on a stormy forecast, check your airline's travel waivers.
| Date | Departures | Cancelled | On time |
|---|---|---|---|
| Jan 25, 2026 | 12 | 67% | 8% |
| Jun 19, 2026 | 14 | 43% | 43% |
| Jan 26, 2026 | 13 | 38% | 23% |
| Jan 24, 2026 | 11 | 36% | 55% |
| Jan 31, 2026 | 10 | 30% | 60% |
| Mar 17, 2026 | 11 | 27% | 64% |
| Mar 8, 2026 | 13 | 23% | 46% |
| Feb 1, 2026 | 13 | 23% | 69% |
| Dec 7, 2025 | 13 | 23% | 23% |
| Mar 7, 2026 | 11 | 18% | 45% |
Last flights of the day
The last flight of the day is a different bet. Across routes from GPT, each airline's final departure was cancelled 2.8% of the time, against 1.8% for its earlier flights (1.5× as often). Late in the day crews run short on duty hours, aircraft arrive late from elsewhere, and with no later flight to fold passengers into, cancelling is easier for the airline. 1.2% of last flights landed 3+ hours late. The riskiest last flight out was American Airlines to Dallas (5.0% cancelled).
| Last flight to | Airline | Leaves | Cancelled | 3h+ late | On time |
|---|---|---|---|---|---|
| DFW Dallas | American Airlines | 7:43 p.m. | 5.0% | 0.8% | 77% |
| CLT Charlotte | American Airlines | 6:35 p.m. | 3.6% | 1.4% | 73% |
| ATL Atlanta | Delta Air Lines | 5:57 p.m. | 1.4% | 1.6% | 78% |
| IAH Houston | United Airlines | 4:59 p.m. | 1.1% | 1.1% | 82% |
Each airline's last scheduled departure of the day on a route, on days it flies the route at least twice; past 12 months. Riskiest first.
Tips for flying out of GPT
- Book the earliest departure you can live with. At GPT the 6 a.m. flights do best.
- Traveling in June? Leave extra slack for anything that can't move: cruises, weddings, the last connection of the day.
- Choosing between airlines? Delta Air Lines has the better record here.
- Need to arrive tonight? Don't book the last flight out of GPT; the one before it leaves you a backup.
- Delayed already? Most delays at GPT come from late-arriving aircraft. If your inbound plane is late, your flight will be too, whatever the board says.
Routes from GPT
Least reliable first. Routes with at least 365 flights a year.
| To | Flights | On time | Cancelled | Typical arrival |
|---|---|---|---|---|
| CLT Charlotte | 1,051 | 81% | 2.9% | −15 min |
| DFW Dallas | 1,074 | 82% | 3.1% | −12 min |
| IAH Houston | 1,089 | 84% | 1.2% | −11 min |
| ATL Atlanta | 1,347 | 85% | 1.6% | −13 min |
Flights into GPT
Arriving rather than leaving? These are the routes into Gulfport Biloxi, least reliable first. The weakest is from Charlotte (76% on time).
| From | Flights | On time | Cancelled |
|---|---|---|---|
| CLT Charlotte | 1,055 | 76% | 2.5% |
| DFW Dallas | 1,070 | 79% | 3.4% |
| ATL Atlanta | 1,347 | 81% | 1.6% |
| IAH Houston | 1,089 | 84% | 1.2% |
Questions about GPT delays
What is the best time to fly out of GPT?
Flights scheduled at 6 a.m.: over the past year 90% of GPT departures at that hour arrived on time, against 74% at 6 p.m., the worst hour.
What month has the most flight delays at GPT?
June (75% on time). October is the best month (89%).
Which airline is most on time at GPT?
Delta Air Lines: 85% of its GPT departures arrived on time over the past year. American Airlines had the weakest record at 82%.
Why are flights delayed at GPT?
The biggest cause was late-arriving aircraft (45% of delay minutes): the plane showed up late from its previous flight, so the delay started somewhere else. Then the airlines themselves (33%).
How often are flights cancelled at GPT?
2.1% of scheduled departures over the past 12 months, peaking in January at 7.9%.
Hours are scheduled local departure times. "On time" means arriving less than 15 minutes late at the destination; cancelled and diverted flights count as not on time. Method.