Airport month record
ATLJUN
Hartsfield-Jackson Atlanta International in June 2026
- Departures
- 26,961
- Month
- June 2026
- National, same month
- 74.3%
- Carriers
- 11
Historical statistics for June 2026, not live status or a forecast for this year’s June. For today’s conditions at ATL, see live FAA status.
ATL in June lands a B, 6 points better than the national rate of 74.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 26,961 flights, of which Delta Air Lines flew 20,812 at 83.0% on time.
Delta Air Lines is the most reliable of the six carriers covered here at 83.0% on time across 20,812 flights.
Key figures
On time
80.1%
Arrivals under 15 minutes late, of 26,505 completed departures
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
1.38%
Nationally in June: 1.65%
Whole year
77.9%
ATL across all twelve months
These figures cover 26,961 departures from Hartsfield-Jackson Atlanta International in June 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
June next to ATL's other months
Against ATL's own year, June ran 2 points better than the twelve-month rate of 77.9%, which makes it number six of twelve months, best first. Either side of it, May ran 77.2% on time and July 66.5%, so a trip moved by a few weeks would have landed in a worse stretch.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| September 2025 | 25,839 | 86.5% | 54 min | 0.07% | A+ |
| October 2025 | 27,556 | 81.6% | 57 min | 0.20% | B+ |
| November 2025 | 25,888 | 80.3% | 66 min | 2.45% | B |
| December 2025 | 25,764 | 73.2% | 69 min | 2.38% | C |
| January 2026 | 24,595 | 78.3% | 61 min | 5.00% | B− |
| February 2026 | 23,024 | 80.3% | 56 min | 1.49% | B |
| March 2026 | 26,669 | 74.8% | 71 min | 3.46% | C− |
| April 2026 | 26,607 | 82.1% | 57 min | 1.00% | B |
| May 2026 | 27,535 | 77.2% | 61 min | 1.18% | B |
| June 2026 (this page) | 26,961 | 80.1% | 70 min | 1.38% | B |
| July 2026 | 28,068 | 66.5% | 79 min | 2.42% | C |
| August 2026 | 27,221 | 74.1% | 71 min | 1.19% | C |
Departure window
The best time of day to leave ATL in June
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 19 points, against 20 points between the best and worst carrier.
- 5am–8am2,050 flights89.4%
- 8am–11am5,537 flights89.0%
- 11am–2pm4,393 flights84.5%
- 2pm–5pm5,031 flights74.9%
- 5pm–8pm4,389 flights70.5%
- 8pm–5am5,561 flights76.4%
Scale runs 60% to 95%.
Book the early departure. Flights leaving between 5am–8am arrive on time 89.4% of the time, against 70.5% for the evening window. That is 19 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 5,561 flights scheduled in it.
Across the week, Tuesday is the strongest day at 86.8% on time and Sunday the weakest at 72.6%, a spread of 14 points.
Carrier by carrier
Which airlines ran best at ATL in June
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 83.0% of the time; Frontier Airlines manages 63.0%. Sample sizes sit next to every figure, because a two-point gap across 2,035 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 20,812 | 83.0% | 64 min | 1.10% | B |
| Frontier Airlines | 2,035 | 63.0% | 85 min | 3.05% | D− |
| Southwest Airlines | 1,309 | 68.1% | 63 min | 0.53% | C+ |
| United Airlines | 690 | 75.8% | 106 min | 1.45% | B |
| American Airlines | 616 | 72.2% | 85 min | 3.08% | C− |
| SkyWest Airlines | 490 | 77.2% | 82 min | 1.43% | B |
| JetBlue Airwaysthin sample | 282 | 72.7% | 81 min | 0.71% | C+ |
| PSA Airlinesthin sample | 282 | 79.8% | 122 min | 6.74% | B− |
| Republic Airwaysthin sample | 269 | 79.2% | 92 min | 6.32% | B− |
| Alaska Airlinesthin sample | 120 | 81.5% | 49 min | 0.83% | B+ |
| Envoy Airthin sample | 56 | 79.6% | 69 min | 0.00% | B+ |
American Airlines cancels 3.1% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Busiest routes out of ATL in June
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ATL to MCO · Orlando | 666 | 73.3% | 103 min | 1.35% | C |
| ATL to LGA · New York | 665 | 72.2% | 75 min | 4.51% | C− |
| ATL to ORD · Chicago | 584 | 68.4% | 99 min | 3.25% | C− |
| ATL to DCA · Washington | 562 | 72.2% | 91 min | 4.27% | C− |
| ATL to PHL · Philadelphia | 544 | 77.7% | 71 min | 2.02% | B |
| ATL to DFW · Dallas-Fort Worth | 541 | 67.5% | 75 min | 4.07% | C− |
| ATL to FLL · Fort Lauderdale | 540 | 78.5% | 66 min | 1.67% | B |
| ATL to TPA · Tampa | 533 | 79.5% | 60 min | 0.94% | B+ |
| ATL to DEN · Denver | 515 | 77.4% | 68 min | 0.39% | B+ |
| ATL to EWR · Newark | 507 | 73.7% | 104 min | 2.96% | C |
| ATL to MIA · Miami | 490 | 77.1% | 74 min | 1.22% | B |
| ATL to BWI · Baltimore | 480 | 73.9% | 64 min | 1.46% | C |
| ATL to BOS · Boston | 467 | 78.4% | 71 min | 1.07% | B |
| ATL to LAX · Los Angeles | 433 | 78.7% | 62 min | 1.15% | B |
| ATL to IAH · Houston | 396 | 71.6% | 63 min | 1.77% | C |
| ATL to RDU · Raleigh | 392 | 82.3% | 80 min | 0.77% | B+ |
| ATL to BNA · Nashville | 390 | 83.8% | 79 min | 0.26% | B+ |
| ATL to LAS · Las Vegas | 389 | 73.3% | 73 min | 0.51% | C+ |
| ATL to IAD · Washington | 381 | 77.4% | 80 min | 1.31% | B |
| ATL to AUS · Austin | 378 | 74.9% | 59 min | 0.53% | C+ |
| ATL to DTW · Detroit | 377 | 79.4% | 78 min | 0.80% | B+ |
| ATL to CLT · Charlotte | 373 | 82.6% | 109 min | 1.61% | B |
| ATL to JAX · Jacksonville | 368 | 79.2% | 55 min | 1.90% | B |
| ATL to JFK · New Yorkthin sample | 342 | 76.9% | 77 min | 0.58% | B+ |
| ATL to SEA · Seattlethin sample | 324 | 76.7% | 52 min | 0.31% | B+ |
Delay causes
What held ATL up in June
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 371,000 reported delay minutes.
- 37%Carrier
- 32%Late-arriving aircraft
- 26%National Airspace System
- 5%Extreme weather
- 0%Security
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 137,000 of the 371,000 delay minutes reported here. The split is drawn from 370,890 reported delay minutes.
Cancellations sit at 1.38% against a national 1.65%, which is ordinary. Diversions add another 0.31%.
7.4% of arrivals land an hour or more late, close to the national 9.7%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
What to do with this
Flying from ATL in June
For a June trip through ATL: expect 80.1% on time and 1.38% cancelled, going by June 2026. The 5am–8am window was the strongest part of the day.
Related
Where to go next
- Hartsfield-Jackson Atlanta International (ATL), the whole year
- ATL in September86.5%
- ATL in October81.6%
- ATL in November80.3%
- ATL in December73.2%
- ATL in January78.3%
- ATL in February80.3%
- ATL in March74.8%
- ATL in April82.1%
- ATL in May77.2%
- ATL in July66.5%
- ATL in August74.1%
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.