Atlanta (ATL) to Boston (BOS): On-Time Performance
Data through July 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 60% in July 2026. Across the full period the route averages 74% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 67%), which matters most in the rough months.
- On-time
- 74%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 14
- last 12 months
- Duration
- 2h 38m
- scheduled
- Distance
- 946 mi
Best airline from ATL to BOS
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 76% | 16 min | 1.4% | 7,628 |
| JetBlue Airways | 73% | 26 min | 2.4% | 1,839 |
| Spirit Airlines | 72% | 19 min | 1.3% | 533 |
| Frontier Airlines | 65% | 24 min | 2.9% | 691 |
Monthly on-time trend
Best time to fly from ATL to BOS
Aim for departures around 8 a.m. (90% on-time); avoid 4 p.m. departures (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 72% | 21 min |
| Tuesday | 78% | 19 min |
| Wednesdaybest | 79% | 12 min |
| Thursday | 72% | 18 min |
| Friday | 73% | 18 min |
| Saturday | 79% | 16 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 system30%
- Weather4%
Frequently asked questions
- How often are flights from ATL to BOS delayed?
- 26% of ATL–BOS 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 18 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 7,628 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 (90% on-time), while departures around 4 p.m. have the worst (60%). 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 38m over 946 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are ATL to BOS flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from ATL to BOS?
- July 2026 was the roughest month in this dataset, with only 60% of arrivals on time. The best was November 2024 at 85%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 10,691 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.