Route Reliability
Miami → Washington
MIA–IAD · 922 miles · Miami International Airport to Washington Dulles International Airport
- 79%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 0.9%
- Cancelled
- 668
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines82%512 flights
- 2.Frontier Airlines68%156 flights
What the data says
Morning flights do better here.
MIA–IAD flights departing between 6–9 AM arrived on time 92% of the time, versus 51% between 3–6 PM.
Sunday scaries are real for this one.
MIA–IAD flights arrived on time 90% of the time on Tuesdays and just 68% on Sundays. That gap is worth planning around.
United Airlines runs this route best.
United Airlines arrived on time 82% of the time on this route; Frontier Airlines managed 68%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon80%(109 flights)
- Tue90%(71 flights)
- Wed84%(75 flights)
- Thu81%(101 flights)
- Fri77%(110 flights)
- Sat76%(93 flights)
- Sun68%(102 flights)
- 6–9 AM92%(26 flights)
- 9 AM–12 PM85%(53 flights)
- 12–3 PM81%(385 flights)
- 3–6 PM51%(39 flights)
- 6–9 PM75%(158 flights)
Jun 60% → May 93% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 52 |
| July 2025 | 64% | 50 |
| August 2025 | 68% | 53 |
| September 2025 | 94% | 47 |
| October 2025 | 86% | 49 |
| November 2025 | 75% | 44 |
| December 2025 | 90% | 58 |
| January 2026 | 82% | 72 |
| February 2026 | 79% | 61 |
| March 2026 | 70% | 63 |
| April 2026 | 87% | 67 |
| May 2026 | 93% | 45 |
Same trip, other airports
Keep nerding
Based on 668 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.