Route · IAD → MIA · 2020–2025 BTS data
Washington to Miami
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAD to MIA (Washington to Miami) ranks #3287 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 81.7%
- On-time
- +2.7 pts
- vs US avg
- 75 min
- Delay when late
- 3,028
- Flights
- #3287 of 4927
- Corpus placement
Cancelled
1.0%
Best Month
Nov 2024 93%
Worst Month
Mar 2024 65%
Distance
921 mi
Carriers
9
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 58 | 11 | 0 | 0 | F9,UA |
| Nov 2025 | 44 | 11 | 0 | 0 | UA,F9 |
| Oct 2025 | 49 | 6 | 0 | 0 | UA,F9 |
| Sep 2025 | 47 | 3 | 0 | 0 | UA,F9 |
| Aug 2025 | 53 | 13 | 0 | 0 | F9,UA |
| Jul 2025 | 52 | 18 | 2 | 0 | UA,F9 |
| Jun 2025 | 52 | 18 | 0 | 0 | UA,F9 |
| May 2025 | 41 | 8 | 0 | 0 | UA,F9 |
| Apr 2025 | 30 | 1 | 0 | 0 | UA |
| Mar 2025 | 60 | 7 | 0 | 0 | UA |
| Feb 2025 | 52 | 10 | 0 | 0 | UA |
| Jan 2025 | 54 | 16 | 1 | 0 | UA |
| Dec 2024 | 62 | 15 | 0 | 0 | UA |
| Nov 2024 | 60 | 4 | 0 | 0 | UA |
| Oct 2024 | 37 | 1 | 0 | 0 | UA |
| Sep 2024 | 30 | 3 | 0 | 0 | UA |
| Aug 2024 | 31 | 3 | 1 | 0 | UA |
| Jul 2024 | 31 | 7 | 0 | 0 | UA |
| Jun 2024 | 30 | 2 | 2 | 0 | UA |
| May 2024 | 53 | 10 | 0 | 0 | UA |
| Apr 2024 | 60 | 12 | 1 | 0 | UA |
| Mar 2024 | 62 | 22 | 0 | 0 | UA |
| Feb 2024 | 58 | 14 | 0 | 0 | UA |
| Jan 2024 | 62 | 17 | 5 | 0 | UA |
IAD–MIA seasonal on-time pattern
Best: September (93.4%) · weakest: July (73.3%)
Strongest calendar month
September
93.4% on-time · ~39 flights/mo
Busiest calendar month
March
~59 flights/mo avg
Weakest calendar month
July
73.3% on-time · ~44 flights/mo
Cancellation Rate
1.0%
12 of 1,168 flights
Diversion Rate
0.0%
0 of 1,168 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profileMIA - Miami
Full on-time, delay-cause, and seasonal performance for Miami, FL.
MIA on-time profileCompare the two airports
See IAD and MIA side by side on delays, cancellations, and reliability.
Compare IAD vs MIAOrigin-hub reliability standing
Mid-pack among IAD departures
From IAD, this corridor sits with 42 other 75–85% on-time routes out of 58 tracked departures, not the hub's reliability leaders (14 at ≥85%) and not the softest ( 2 below 75%). Destination: Miami · fleet on-time rank #2471 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAD–MIA.
Routes with a similar on-time rate
What the Data Says About IAD to MIA
3,028 tracked flights put the IAD to MIA pairing (Washington to Miami) at a 81.7% on-time rate, squarely in line with the wider network. Delays that do occur run 75.2 minutes on average. Across the 921-mile route and its 9 carriers, the trailing 24 months show 1.0% cancelled and 0.0% diverted (1,168 flights sampled).
The monthly split is wide on this route: Nov 2024 posted the strongest performance at 93% on-time, while Mar 2024 came in at just 65% - a 29-point swing worth factoring into travel timing.
On the multi-year calendar, IAD–MIA peaks in September at 93.4% on-time while March carries the heaviest traffic (~59 flights per month) ; the softest month is July at 73.3%, a 20.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does IAD to MIA rank among US routes by traffic? ▼
How often are flights delayed from IAD to MIA? ▼
What is the cancellation rate for IAD to MIA? ▼
How far is the flight from IAD to MIA? ▼
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Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using IAD–MIA data
IAD–MIA is mid-pack at 81.7% on-time; month and carrier mix move more than the corridor headline.
- Compare IAD and MIA airport profiles: delay causes and top routes differ even on the same corridor. IAD airport
- If your dates flex, September (93.4% on-time) beats July (73.3%) on this corridor. Seasonal chart
- 4 other routes post a similar 81.7% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.