Route Reliability

Route reliability

Boston (BOS) to Atlanta (ATL): which airline is most on time?

On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Boston, MA (BOS) to Atlanta, GA (ATL), September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Boston, MAAtlanta, GA

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Three-letter airport codes, nonstop U.S. domestic flights. One direction at a time.

Route at a glance · September 2025 to August 2026

BOS to ATL

Boston, MA to Atlanta, GA

On time
74.9%vs 75.6% U.S. average About average
Cancelled
2.2%vs 1.9% U.S. average About average
60+ min late
8.6%vs 8.1% U.S. average About average
Scheduled flights
5,050in 12 months4 airlines
Most reliable airline
Delta Air Lines79.2% on time · 3,726 flights

On time about as often as the U.S. average, with a typical cancellation rate.

Compared with all U.S. flights, September 2025 to August 2026. “About average” means within 1.5 points for on time, 0.3 for cancelled and 1 for 60+ minutes late.

Airlines on this route

Ranked by on-time arrival

Airlines from BOS to ATL, September 2025 to August 2026. Rates are shares of all scheduled flights.
Airline On time Cancelled 60+ min late Avg delay when late Diverted Flights
1. Delta Air Lines Most reliable 79.2% 1.9% 7.4% 75 min 0.2% 3,726
2. JetBlue Airways 64.1% 3.6% 13.0% 70 min 0.5% 859
3. Frontier Airlines 60.7% 2.9% 9.7% 62 min 0.2% 453
Spirit Airlines Insufficient sample (fewer than 50 flights) 12

On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.

What this means

Delta Air Lines has the strongest record on this route.

  • Delta Air Lines had the best on-time record from Boston (BOS) to Atlanta (ATL): 79.2% of its 3,726 scheduled flights arrived within 15 minutes of schedule, compared with 60.7% for Frontier Airlines.
  • Spirit Airlines also flew this route but with fewer than 50 reported flights, too few to rate.
  • 2.2% of flights on this route were cancelled (about 1 in 45), about the same as the U.S. average of 1.9%.
  • 8.6% of flights, about 1 in 12, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 72 min.
  • Overall, 74.9% of flights on this route arrived on time, 0.7 points lower than the U.S. average of 75.6%.
  • Over the last 3 years, October was the most reliable month on this route (84.9% on time) and July the least reliable (67.1%).
  • Cancellations peaked in January, when 4.0% of flights were cancelled.
  • Flights scheduled to depart before 6 am were the most punctual (85.4% on time); flights scheduled to depart 7 pm to 8 pm were the least (50.2%).
  • In the other direction, Atlanta (ATL) to Boston (BOS), 71.2% of flights were on time and 2.3% were cancelled. Compare airlines ATL to BOS.

Best and worst months to fly BOS to ATL

Jan 70.9%
Feb 77.4%
Mar 82.6%
Apr 78.6%
May 77.4%
Jun 79.2%
Jul 67.1%
Aug 72.9%
Sep 78.5%
Oct 84.9%
Nov 84.3%
Dec 76.1%
Share of scheduled flights on time 12-month average 74.9%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 70.9% 1,065
February 77.4% 991
March 82.6% 1,199
April 78.6% 1,297
May 77.4% 1,337
June 79.2% 1,305
July 67.1% 1,317
August 72.9% 1,347
September 78.5% 1,309
October 84.9% 1,355
November 84.3% 1,267
December 76.1% 1,278
Best and worst calendar month by airline, September 2023 to August 2026.
AirlineBest monthWorst month
Delta Air Lines November (88.5%) July (71.6%)
JetBlue Airways October (80.6%) July (51.5%)
Frontier Airlines October (72.0%) January (49.3%)

Month by month, last 12 months

Sep 82.5%
Oct 81.2%
Nov 77.1%
Dec 67.1%
Jan 66.8%
Feb 70.0%
Mar 78.4%
Apr 79.8%
May 79.7%
Jun 81.9%
Jul 64.7%
Aug 68.1%
Share of scheduled flights on time U.S. average 75.6%
All airlines combined, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Sep 2025 82.5% 401
Oct 2025 81.2% 425
Nov 2025 77.1% 414
Dec 2025 67.1% 417
Jan 2026 66.8% 343
Feb 2026 70.0% 327
Mar 2026 78.4% 403
Apr 2026 79.8% 445
May 2026 79.7% 463
Jun 2026 81.9% 465
Jul 2026 64.7% 467
Aug 2026 68.1% 480

Best and worst departure times

<6a 85.4%
6a 76.0%
7a 89.5%
8a 84.8%
9a 82.9%
10a 81.7%
11a 67.9%
12p 77.8%
1p 74.8%
2p 82.1%
3p 68.7%
4p 63.9%
5p 71.1%
6p 72.0%
7p 50.2%
8p 66.7%
9p 50.8%
Share of scheduled flights on time
By scheduled local departure hour at BOS, September 2025 to August 2026. Hours with no scheduled flights are omitted. Scale starts at zero.
Show as table
PeriodOn timeFlights
Departing before 6 am 85.4% 378
Departing 6 am to 7 am 76.0% 584
Departing 7 am to 8 am 89.5% 57
Departing 8 am to 9 am 84.8% 487
Departing 9 am to 10 am 82.9% 362
Departing 10 am to 11 am 81.7% 295
Departing 11 am to noon 67.9% 221
Departing noon to 1 pm 77.8% 427
Departing 1 pm to 2 pm 74.8% 274
Departing 2 pm to 3 pm 82.1% 162
Departing 3 pm to 4 pm 68.7% 454
Departing 4 pm to 5 pm 63.9% 158
Departing 5 pm to 6 pm 71.1% 305
Departing 6 pm to 7 pm 72.0% 378
Departing 7 pm to 8 pm 50.2% 239
Departing 8 pm to 9 pm 66.7% 204
Departing 9 pm to 10 pm 50.8% 65
Woman at an airport window watching a plane take off
Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source
U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period
September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through
August 2026
Processed
2026-11-03
Scope
Nonstop scheduled flights from Boston, MA (BOS) to Atlanta, GA (ATL), one direction. Airlines that report to the DOT only.
Method
Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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