Route reliability record
TLH→MIA
Tallahassee to Miami
- Flights
- 1,198
- Period
- September 2025 to August 2026
- Distance
- 402 mi
- Carriers
- 3
This route lands a B+, 4 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 1,198 TLH to MIA flights, with a median arrival 4 minutes early.
Best time to fly TLH to MIA: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 91.9% of the time and Tuesday flights 91.5%, against 81.6% for the route overall.
Set against the rest of the country, this route's record is 4 points better than the US average of 77.3%. That gap is worth roughly 43 fewer late arrivals for every thousand flights.
Key figures
On time
81.6%
Arrivals under 15 minutes late, of 1,189 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
0.58%
National rate is 1.89%
Best carrier
Envoy
81.8% on time across 1,182 flights
These figures cover 1,198 flights between September 2025 and August 2026. The median arrival is 4 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 TLH to MIA
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 |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 8 | 87.5% | 590 min | 0.00% | A+ |
| Envoy Air | 1,182 | 81.8% | 76 min | 0.59% | B+ |
| American Airlinesthin sample | 8 | 37.5% | 68 min | 0.00% | F+ |
Flight by flight
Flights on TLH to MIA
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.
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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 25 points, against half a point between the best and worst carrier.
- 5am–8am361 flights91.9%
- 8am–11am325 flights84.0%
- 11am–2pm40 flights87.2%
- 2pm–5pm55 flights74.5%
- 5pm–8pm103 flights66.7%
- 8pm–5am314 flights72.6%
Scale runs 60% to 95%.
Book the early departure. Flights leaving between 5am–8am arrive on time 91.9% of the time, against 66.7% for the evening window. That is 25 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 361 flights scheduled in it.
Explore
Filter TLH to MIA 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 TLH to MIA, the best departure window is 5am–8am at 91.9% on time and the worst is 5pm–8pm at 66.7%, a wide gap of 25.2 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am91.9%
- 8–11am84.0%
- 11am–2pm87.2%
- 2–5pm74.5%
- 5–8pm66.7%
- 8pm–5am72.6%
best all US flightsScale 60% to 95%.
Across the year
When delays peak on this route
This route's year swings by 15 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.
April is the best month on the calendar at 90.0% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. August was the busiest month here, with 124 flights.
Across the week, Tuesday is the strongest day at 91.5% on time and Sunday the weakest at 71.8%, a spread of 20 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 44% of the 17,000 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Late-arriving aircraft
- 34%Carrier
- 14%National Airspace System
- 8%Extreme weather
- 0%Security
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 17,000 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 17,073 reported delay minutes.
The largest share of delay minutes, 34%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,830 of the 17,000 delay minutes reported here.
Cancellations are rare at 0.58%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
6.4% 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 a little over an hour, which a normal layover absorbs.
At 402 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 runs 83.4% on time across 1,198 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 1,198 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 MIA 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 90.0% on time and March 75.0%, a swing of 15 points. If the dates move at all, move them out of March before you think about anything else. 1,189 completed flights over 12 months sit behind that.
Common questions
TLH to MIA questions
How often is TLH to MIA delayed?
Roughly one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.4% of the 1,198 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is TLH to MIA compared with the rest of the country?
81.6% of flights arrive on time here against a national 77.3%, a difference of 4 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on TLH to MIA?
The 5am–8am departure window is the strongest at 91.9% on time. The 5pm–8pm window is the weakest at 66.7%, 25 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 March delays on TLH to MIA?
March is the weakest month at 75.0% on time, compared with 90.0% in April. Across the year that is 15 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
- MIA to TLH — the return legseparate record
- Miami International (MIA) delay statistics
- TLH to ATL, a related route85.9%
- ATL to MIA, a related route71.2%
- TLH to DFW, a related route78.9%
- Republic Airways on-time record87.5%
- Envoy Air on-time record81.8%
- American Airlines on-time record37.5%
- 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. TLH to MIA and MIA to TLH 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.