Atlanta (ATL) to Boston (BOS): On-Time Performance
Data through May 2026
When you fly ATL to BOS matters as much as anything else about the booking: the route swung from 85% on-time in November 2024 to just 65% in July 2025. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 68%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.6%
- Flights/day
- 13
- last 12 months
- Duration
- 2h 37m
- scheduled
- Distance
- 946 mi
Best airline from ATL to BOS
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 76% | 15 min | 1.4% | 7,276 |
| JetBlue Airways | 74% | 25 min | 2.1% | 1,727 |
| Spirit Airlines | 72% | 19 min | 1.2% | 563 |
| Frontier Airlines | 64% | 25 min | 2.7% | 596 |
Monthly on-time trend
Best time to fly from ATL to BOS
Aim for departures around 8 a.m. (89% on-time); avoid 4 p.m. departures (61%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 20 min |
| Tuesday | 79% | 16 min |
| Wednesdaybest | 79% | 12 min |
| Thursday | 73% | 18 min |
| Friday | 73% | 18 min |
| Saturdaybest | 79% | 15 min |
| Sunday | 69% | 23 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft26%
- Airline operations39%
- National airspace system31%
- Weather4%
Frequently asked questions
- How often are flights from ATL to BOS delayed?
- 25% of ATL–BOS 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 17 minutes.
- Which airline is most reliable from ATL to BOS?
- Delta Air Lines has the best on-time record on this route at 76%, based on 7,276 flights. 4 airlines flew ATL–BOS frequently enough to compare in this period.
- What is the best time of day to fly from ATL to BOS?
- Departures around 8 a.m. have the best record (89% on-time), while departures around 4 p.m. have the worst (61%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to BOS?
- The scheduled ATL–BOS flight time averages 2h 37m over 946 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are ATL to BOS flights cancelled?
- 1.6% 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 ATL to BOS?
- July 2025 was the roughest month in this dataset, with only 65% of arrivals on time. The best was November 2024 at 85%. If your dates are flexible, that 20-point gap is worth planning around.
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Based on 10,162 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.