Jacksonville (JAX) to Washington (IAD): On-Time Performance
Data through May 2026
The calendar drives reliability on JAX–IAD. September 2025 flights landed on schedule 98% of the time, but July 2025 dropped to 69% — a gap of 29 points. Across the full period the route averages 86% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 82%), which matters most in the rough months.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 2.1
- last 12 months
- Duration
- 1h 53m
- scheduled
- Distance
- 631 mi
Best airline from JAX to IAD
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 89% | 11 min | 1.7% | 233 |
| United Airlines | 89% | 12 min | 1.1% | 1,208 |
| Allegiant Air | 59% | 38 min | 1.7% | 119 |
Monthly on-time trend
Best time to fly from JAX to IAD
Aim for departures around 9 a.m. (91% on-time); avoid 4 p.m. departures (48%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 83% | 15 min |
| Tuesdaybest | 94% | 6 min |
| Wednesday | 89% | 15 min |
| Thursday | 85% | 15 min |
| Friday | 81% | 22 min |
| Saturday | 89% | 7 min |
| Sunday | 88% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft31%
- Airline operations41%
- National airspace system22%
- Weather6%
Frequently asked questions
- How often are flights from JAX to IAD delayed?
- 14% of JAX–IAD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from JAX to IAD?
- Republic Airways has the best on-time record on this route at 89%, based on 233 flights. 3 airlines flew JAX–IAD frequently enough to compare in this period.
- What is the best time of day to fly from JAX to IAD?
- Departures around 9 a.m. have the best record (91% on-time), while departures around 4 p.m. have the worst (48%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from JAX to IAD?
- The scheduled JAX–IAD flight time averages 1h 53m over 631 miles. Actual arrival times vary — flights on this route land 15+ minutes late 14% of the time.
- How often are JAX to IAD flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from JAX to IAD?
- July 2025 was the roughest month in this dataset, with only 69% of arrivals on time. The best was September 2025 at 98%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 1,560 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.