Jacksonville (JAX) to Washington (IAD): On-Time Performance
Data through July 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 (90% vs 81%), which matters most in the rough months.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 2.1
- last 12 months
- Duration
- 1h 54m
- scheduled
- Distance
- 631 mi
Best airline from JAX to IAD
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 89% | 10 min | 2.0% | 203 |
| United Airlines | 88% | 12 min | 1.2% | 1,270 |
| Allegiant Air | 57% | 37 min | 1.6% | 129 |
Monthly on-time trend
Best time to fly from JAX to IAD
Aim for departures around 12 p.m. (91% on-time); avoid 4 p.m. departures (47%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 15 min |
| Tuesdaybest | 93% | 6 min |
| Wednesday | 88% | 15 min |
| Thursday | 86% | 15 min |
| Friday | 80% | 22 min |
| Saturday | 90% | 8 min |
| Sunday | 88% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft30%
- Airline operations44%
- National airspace system22%
- Weather4%
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 2024-07 and 2026-07. 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 203 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 12 p.m. have the best record (91% on-time), while departures around 4 p.m. have the worst (47%). 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 54m 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?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, 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 1,602 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.