Aviation Data
EN
EnglishTiếng Việt

1,147 km · Domestic

Hartsfield Jackson Atlanta (ATL) – Buffalo Niagara (BUF)

In July 2026, 287 flights operated between Hartsfield Jackson Atlanta and Buffalo Niagara (both directions), and 56.4% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January173181▲ 4.6%
February174194▲ 11.5%
March210252▲ 20.0%
April202287▲ 42.1%
May214294▲ 37.4%
June237276▲ 16.5%
July264287▲ 8.7%
August265––
September248––
October284–in progress
November209––
December200––
Year to date (Jan–Jul)1,4741,771▲ 20.1%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January76.3%74.6%▼ 2.2%
February74.7%80.4%▲ 7.6%
March78.1%82.1%▲ 5.1%
April84.7%78.7%▼ 7.1%
May70.6%75.9%▲ 7.5%
June64.6%77.2%▲ 19.5%
July72.7%56.4%▼ 22.4%
August79.2%––
September95.2%––
October86.3%–in progress
November82.8%––
December73.5%––
Year-to-date average (Jan–Jul)74.5%75.0%▲ 0.7%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January915▲ 66.7%
February00–
March04–
April21▼ 50.0%
May04–
June136▼ 53.8%
July47▲ 75.0%
August7––
September0––
October0–in progress
November6––
December14––
Year to date (Jan–Jul)2837▲ 32.1%

Airlines on this route

  1. Delta Air Lines 83.8%
  2. Frontier Airlines 16.2%
  3. Southwest Airlines 0.0%

Oct 1, 2024 – Jul 31, 2026

By direction

ATL → BUF

Scheduled flights
2,571
Flights operated
2,526
Cancelled
45 · 1.8%
On-time departures
78.1%

BUF → ATL

Scheduled flights
2,571
Flights operated
2,524
Cancelled
47 · 1.8%
On-time departures
77.0%

ATL → BUF and BUF → ATL counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 4,309 83.8% 79.4% 70
Frontier Airlines F9 831 16.2% 68.0% 22
Southwest Airlines WN 2 0.0% 50.0% 0

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay09:00–10:004.4min · 679 recorded · 668 measured
Gap to highest-delay hour16.0min09:00 ↔ 14:00
Recorded flights5,142ATL–BUF

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 30 recorded · 30 measured · Source: the US BTS 06:00 · 88.1% · 635 recorded · 623 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 8 recorded · 8 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 68 recorded · 67 measured · Source: the US BTS 09:00 · 84.6% · 679 recorded · 668 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 100 recorded · 97 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 166 recorded · 160 measured · Source: the US BTS 12:00 · 77.4% · 756 recorded · 744 measured · Source: the US BTS 13:00 · 78.3% · 282 recorded · 276 measured · Source: the US BTS 14:00 · 74.1% · 267 recorded · 259 measured · Source: the US BTS 15:00 · 77.5% · 357 recorded · 351 measured · Source: the US BTS 16:00 · 69.4% · 375 recorded · 372 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 188 recorded · 184 measured · Source: the US BTS 18:00 · 72.6% · 321 recorded · 314 measured · Source: the US BTS 19:00 · 68.6% · 247 recorded · 245 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 21:00 · 77.8% · 611 recorded · 600 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 46 recorded · 46 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 30 recorded · 30 measured · Source: the US BTS 06:00 · 10.6 min · 635 recorded · 623 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 8 recorded · 8 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 68 recorded · 67 measured · Source: the US BTS 09:00 · 4.4 min · 679 recorded · 668 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 100 recorded · 97 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 166 recorded · 160 measured · Source: the US BTS 12:00 · 11.5 min · 756 recorded · 744 measured · Source: the US BTS 13:00 · 8.7 min · 282 recorded · 276 measured · Source: the US BTS 14:00 · 20.5 min · 267 recorded · 259 measured · Source: the US BTS 15:00 · 9.9 min · 357 recorded · 351 measured · Source: the US BTS 16:00 · 16.7 min · 375 recorded · 372 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 188 recorded · 184 measured · Source: the US BTS 18:00 · 15.6 min · 321 recorded · 314 measured · Source: the US BTS 19:00 · 17.7 min · 247 recorded · 245 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 21:00 · 13.0 min · 611 recorded · 600 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 46 recorded · 46 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 30 · 30 recorded · 30 measured · Source: the US BTS 06:00 · 635 · 635 recorded · 623 measured · Source: the US BTS 07:00 · 8 · 8 recorded · 8 measured · Source: the US BTS 08:00 · 68 · 68 recorded · 67 measured · Source: the US BTS 09:00 · 679 · 679 recorded · 668 measured · Source: the US BTS 10:00 · 100 · 100 recorded · 97 measured · Source: the US BTS 11:00 · 166 · 166 recorded · 160 measured · Source: the US BTS 12:00 · 756 · 756 recorded · 744 measured · Source: the US BTS 13:00 · 282 · 282 recorded · 276 measured · Source: the US BTS 14:00 · 267 · 267 recorded · 259 measured · Source: the US BTS 15:00 · 357 · 357 recorded · 351 measured · Source: the US BTS 16:00 · 375 · 375 recorded · 372 measured · Source: the US BTS 17:00 · 188 · 188 recorded · 184 measured · Source: the US BTS 18:00 · 321 · 321 recorded · 314 measured · Source: the US BTS 19:00 · 247 · 247 recorded · 245 measured · Source: the US BTS 20:00 · 6 · 6 recorded · 6 measured · Source: the US BTS 21:00 · 611 · 611 recorded · 600 measured · Source: the US BTS 22:00 · 46 · 46 recorded · 46 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00Fewer than 200 measured departures—3030
06:0088.1%10.6 min623635
07:00Fewer than 200 measured departures—88
08:00Fewer than 200 measured departures—6768
09:0084.6%4.4 min668679
10:00Fewer than 200 measured departures—97100
11:00Fewer than 200 measured departures—160166
12:0077.4%11.5 min744756
13:0078.3%8.7 min276282
14:0074.1%20.5 min259267
15:0077.5%9.9 min351357
16:0069.4%16.7 min372375
17:00Fewer than 200 measured departures—184188
18:0072.6%15.6 min314321
19:0068.6%17.7 min245247
20:00Fewer than 200 measured departures—66
21:0077.8%13.0 min600611
22:00Fewer than 200 measured departures—4646
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 75.9% · 755 recorded · 735 measured · Source: the US BTS Tuesday · 79.9% · 695 recorded · 690 measured · Source: the US BTS Wednesday · 86.4% · 650 recorded · 648 measured · Source: the US BTS Thursday · 78.8% · 812 recorded · 805 measured · Source: the US BTS Friday · 77.4% · 752 recorded · 731 measured · Source: the US BTS Saturday · 76.3% · 661 recorded · 640 measured · Source: the US BTS Sunday · 70.0% · 817 recorded · 801 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 14.6 min · 755 recorded · 735 measured · Source: the US BTS Tuesday · 12.5 min · 695 recorded · 690 measured · Source: the US BTS Wednesday · 7.0 min · 650 recorded · 648 measured · Source: the US BTS Thursday · 10.0 min · 812 recorded · 805 measured · Source: the US BTS Friday · 13.2 min · 752 recorded · 731 measured · Source: the US BTS Saturday · 11.6 min · 661 recorded · 640 measured · Source: the US BTS Sunday · 16.7 min · 817 recorded · 801 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 755 · 755 recorded · 735 measured · Source: the US BTS Tuesday · 695 · 695 recorded · 690 measured · Source: the US BTS Wednesday · 650 · 650 recorded · 648 measured · Source: the US BTS Thursday · 812 · 812 recorded · 805 measured · Source: the US BTS Friday · 752 · 752 recorded · 731 measured · Source: the US BTS Saturday · 661 · 661 recorded · 640 measured · Source: the US BTS Sunday · 817 · 817 recorded · 801 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday75.9%14.6 min735755
Tuesday79.9%12.5 min690695
Wednesday86.4%7.0 min648650
Thursday78.8%10.0 min805812
Friday77.4%13.2 min731752
Saturday76.3%11.6 min640661
Sunday70.0%16.7 min801817

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 75.4% · 378 recorded · 354 measured · Source: the US BTS Feb · 77.7% · 368 recorded · 368 measured · Source: the US BTS Mar · 80.3% · 466 recorded · 462 measured · Source: the US BTS Apr · 81.2% · 492 recorded · 489 measured · Source: the US BTS May · 73.6% · 512 recorded · 508 measured · Source: the US BTS Jun · 71.4% · 532 recorded · 513 measured · Source: the US BTS Jul · 64.3% · 562 recorded · 551 measured · Source: the US BTS Aug · 79.3% · 272 recorded · 265 measured · Source: the US BTS Sep · 95.2% · 248 recorded · 248 measured · Source: the US BTS Oct · 85.5% · 456 recorded · 456 measured · Source: the US BTS Nov · 85.7% · 440 recorded · 434 measured · Source: the US BTS Dec · 73.4% · 416 recorded · 402 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 13.7 min · 378 recorded · 354 measured · Source: the US BTS Feb · 18.2 min · 368 recorded · 368 measured · Source: the US BTS Mar · 9.9 min · 466 recorded · 462 measured · Source: the US BTS Apr · 10.1 min · 492 recorded · 489 measured · Source: the US BTS May · 14.6 min · 512 recorded · 508 measured · Source: the US BTS Jun · 14.6 min · 532 recorded · 513 measured · Source: the US BTS Jul · 23.4 min · 562 recorded · 551 measured · Source: the US BTS Aug · 13.3 min · 272 recorded · 265 measured · Source: the US BTS Sep · -3.1 min · 248 recorded · 248 measured · Source: the US BTS Oct · 4.0 min · 456 recorded · 456 measured · Source: the US BTS Nov · 5.9 min · 440 recorded · 434 measured · Source: the US BTS Dec · 16.0 min · 416 recorded · 402 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 378 · 378 recorded · 354 measured · Source: the US BTS Feb · 368 · 368 recorded · 368 measured · Source: the US BTS Mar · 466 · 466 recorded · 462 measured · Source: the US BTS Apr · 492 · 492 recorded · 489 measured · Source: the US BTS May · 512 · 512 recorded · 508 measured · Source: the US BTS Jun · 532 · 532 recorded · 513 measured · Source: the US BTS Jul · 562 · 562 recorded · 551 measured · Source: the US BTS Aug · 272 · 272 recorded · 265 measured · Source: the US BTS Sep · 248 · 248 recorded · 248 measured · Source: the US BTS Oct · 456 · 456 recorded · 456 measured · Source: the US BTS Nov · 440 · 440 recorded · 434 measured · Source: the US BTS Dec · 416 · 416 recorded · 402 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan75.4%13.7 min354378
Feb77.7%18.2 min368368
Mar80.3%9.9 min462466
Apr81.2%10.1 min489492
May73.6%14.6 min508512
Jun71.4%14.6 min513532
Jul64.3%23.4 min551562
Aug79.3%13.3 min265272
Sep95.2%-3.1 min248248
Oct85.5%4.0 min456456
Nov85.7%5.9 min434440
Dec73.4%16.0 min402416

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 76.2% 3,918
  • Delayed >15 min 22.0% 1,132
  • Cancelled 1.8% 92
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

16
16 of 16
Flight numbersBy direction DeparturesOn time
DL1384 BUF → ATL 658 79.3%
DL1384 ATL → BUF 658 86.5%
DL2334 ATL → BUF 658 78.8%
DL2664 BUF → ATL 658 88.1%
DL2050 ATL → BUF 522 74.5%
DL2050 BUF → ATL 490 72.1%
DL2266 ATL → BUF 267 80.1%
DL2266 BUF → ATL 257 67.5%
F991407 BUF → ATL 231 66.7%
F991408 ATL → BUF 224 65.1%
F993852 ATL → BUF 191 67.9%
F993869 BUF → ATL 114 68.5%
F993851 BUF → ATL 71 80.3%
DL2054 BUF → ATL 42 61.9%
DL2084 ATL → BUF 31 76.7%
DL2084 BUF → ATL 31 71.0%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 287 +8.7% 7 56.4%
June 2026 276 +16.5% 6 77.2%
May 2026 294 +37.4% 4 75.9%
April 2026 287 +42.1% 1 78.7%
March 2026 252 +20.0% 4 82.1%
February 2026 194 +11.5% 0 80.4%
January 2026 181 +4.6% 15 74.6%
December 2025 200 −1.0% 14 73.5%
November 2025 209 −7.1% 6 82.8%
October 2025 284 +65.1% 0 86.3%
September 2025 248 0 95.2%
August 2025 265 7 79.2%
July 2025 264 4 72.7%
June 2025 237 13 64.6%
May 2025 214 0 70.6%
April 2025 202 2 84.7%
March 2025 210 0 78.1%
February 2025 174 0 74.7%
January 2025 173 9 76.3%
December 2024 202 0 73.3%
November 2024 225 0 88.4%
October 2024 172 0 84.3%

How to read this chart

Loading the guide…