Route reliability record
MLB→ATL
Melbourne to Atlanta
- Flights
- 1,448
- Period
- July 2025 to June 2026
- Distance
- 443 mi
- Carriers
- 1
This route earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 1,448 MLB to ATL flights, with a median arrival 14 minutes early.
Best time to fly MLB to ATL: a 5am–8am departure, ideally on a Thursday. Flights in that window arrived on time 95.8% of the time and Thursday flights 90.6%, against 87.9% for the route overall.
Set against the rest of the country, this route's record is 10 points better than the US average of 77.6%. That gap is worth roughly 103 fewer late arrivals for every thousand flights.
Key figures
On time
87.9%
Arrivals under 15 minutes late, of 1,427 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
1.38%
National rate is 1.81%
Best carrier
Delta
87.9% on time across 1,448 flights
These figures cover 1,448 flights between July 2025 and June 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Carrier by carrier
Which airline is most reliable on MLB to ATL
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 1,448 | 87.9% | 78 min | 1.38% | A |
Flight by flight
Flights on MLB to ATL
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
Best ways to make this trip
The most reliable ways to fly Melbourne to Atlanta
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 4 of the top 5 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. MLB → ATLMelbourne to Atlanta | Delta Air Lines | 86.7% | 87.9% | 1.38% | 5am–8am, Thu | DL 2953 06:00 |
| 2. MCO → ATLOrlando to Atlanta | Delta Air Lines | 78.1% | 79.1% | 1.24% | 5am–8am, Wed | DL 1494 06:15 |
| 3. MCO → ATLOrlando to Atlanta | Southwest Airlines | 70.3% | 71.3% | 1.37% | 8am–11am, Wed | — |
| 4. MCO → ATLOrlando to Atlanta | Frontier Airlines | 66.7% | 67.7% | 1.53% | 5am–8am, Wed | F9 1563 05:15 |
| 5. MCO → ATLOrlando to Atlanta | Spirit Airlines | 62.6% | 64.5% | 2.97% | 2pm–5pm, Wed | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am365 flights95.8%
- 8am–11am—
- 11am–2pm365 flights90.9%
- 2pm–5pm364 flights81.2%
- 5pm–8pm354 flights83.8%
- 8pm–5am—
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 95.8% of the time, against 81.2% for the afternoon window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 365 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 16 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
July is the worst month at 78.3% on time, 16 points below April, the best at 94.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 124 flights.
Across the week, Thursday is the strongest day at 90.6% on time and Sunday the weakest at 84.2%. 6 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 13,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 46%Late-arriving aircraft
- 26%Carrier
- 15%National Airspace System
- 12%Extreme weather
- 1%Security
Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 13,481 reported delay minutes.
46% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 13,000 reported delay minutes here, that single category outweighs weather by 4 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.
Cancellations sit at 1.38% against a national 1.81%, which is ordinary. Diversions add another 0.07%.
Connections and stage length
What a delay here actually costs
Badly late arrivals are rare here: only 4.6% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 443 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 84.2% on time across 1,448 flights, 4 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
The sample behind these figures is 1,448 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in ATL after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 94.1% on time and July 78.3%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else. 1,427 completed flights over 12 months sit behind that.
Common questions
MLB to ATL questions
How often is MLB to ATL delayed?
About one flight in eight arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 12.1% of the 1,448 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
How reliable is MLB to ATL compared with the rest of the country?
87.9% of flights arrive on time here against a national 77.6%, a difference of 10 points in its favour. That is worth a A on this site's grading scale.
What time of day has the fewest delays on MLB to ATL?
The 5am–8am departure window is the strongest at 95.8% on time. The 2pm–5pm window is the weakest at 81.2%, 15 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on MLB to ATL?
July is the weakest month at 78.3% on time, compared with 94.1% in April. Across the year that is 16 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- ATL to MLB — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- MLB to CLT, a related route81.7%
- LGA to ATL, a related route76.6%
- MCO to ATL, a related route75.6%
- Delta Air Lines on-time record87.9%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. MLB to ATL and ATL to MLB are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed MLB to ATL’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.