Route reliability record
ATL→TLH
Atlanta to Tallahassee
- Flights
- 2,011
- Period
- September 2025 to August 2026
- Distance
- 223 mi
- Carriers
- 2
This route lands a B, 7 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 2,011 ATL to TLH flights, with a median arrival 8 minutes early.
Best time to fly ATL to TLH: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 89.5% of the time and Wednesday flights 93.4%, against 83.8% for the route overall.
Set against the rest of the country, this route's record is 7 points better than the US average of 77.3%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.
Key figures
On time
83.8%
Arrivals under 15 minutes late, of 1,972 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
1.69%
National rate is 1.89%
Best carrier
Delta
83.8% on time across 2,009 flights
These figures cover 2,011 flights between September 2025 and August 2026. The median arrival is 8 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.
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Carrier by carrier
Which airline is most reliable on ATL to TLH
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 |
|---|---|---|---|---|---|
| SkyWest Airlinesthin sample | 2 | 100.0% | — | 50.00% | A− |
| Delta Air Lines | 2,009 | 83.8% | 65 min | 1.64% | B |
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Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 2,011 flights.
- 5am–8am—
- 8am–11am396 flights89.5%
- 11am–2pm270 flights84.2%
- 2pm–5pm444 flights82.7%
- 5pm–8pm537 flights80.3%
- 8pm–5am364 flights84.0%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 89.5% of the time, against 80.3% for the evening window. That is 9 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 537 flights scheduled in it.
Explore
Filter ATL to TLH by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On ATL to TLH, the best departure window is 8am–11am at 89.5% on time and the worst is 5pm–8pm at 80.3%, a real gap of 9.2 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am89.5%
- 11am–2pm84.2%
- 2–5pm82.7%
- 5–8pm80.3%
- 8pm–5am84.0%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
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 73.9% on time, 16 points below June, the best at 90.2%. 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. May was the busiest month here, with 201 flights.
Across the week, Wednesday is the strongest day at 93.4% on time and Sunday the weakest at 79.0%, a spread of 14 points.
Delay causes
Why this route gets delayed
Carrier accounts for 44% of the 21,000 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 35%Late-arriving aircraft
- 13%National Airspace System
- 8%Extreme weather
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 21,000 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 20,575 reported delay minutes.
The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 9,152 of the 21,000 delay minutes reported here.
Cancellations sit at 1.69% against a national 1.89%, which is ordinary. Diversions add another 0.25%.
Connections and stage length
What a delay here actually costs
5.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
At 223 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 8am–11am window matters as much as it does.
The return leg runs 85.9% on time across 2,011 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 2,011 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 TLH 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. June runs 90.2% on time and July 73.9%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else. 1,972 completed flights over 12 months sit behind that.
Common questions
ATL to TLH questions
How often is ATL to TLH delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 16.2% of the 2,011 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
How reliable is ATL to TLH compared with the rest of the country?
83.8% of flights arrive on time here against a national 77.3%, a difference of 7 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on ATL to TLH?
The 8am–11am departure window is the strongest at 89.5% on time. The 5pm–8pm window is the weakest at 80.3%, 9 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 ATL to TLH?
July is the weakest month at 73.9% on time, compared with 90.2% in June. 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
- TLH to ATL — the return legseparate record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- ATL to LGA, a related route72.3%
- MIA to TLH, a related route83.4%
- ATL to MCO, a related route70.3%
- SkyWest Airlines on-time record100.0%
- Delta Air Lines on-time record83.8%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. ATL to TLH and TLH to ATL are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.