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386 km · Domestic

James M. Cox Dayton (DAY) – Chicago O'Hare (ORD)

In July 2026, 280 flights operated between James M. Cox Dayton and Chicago O'Hare (both directions), and 80.7% 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
January206264▲ 28.2%
February218235▲ 7.8%
March140236▲ 68.6%
April220309▲ 40.5%
May274282▲ 2.9%
June365242▼ 33.7%
July203280▲ 37.9%
August226––
September232––
October331–in progress
November422––
December330––
Year to date (Jan–Jul)1,6261,848▲ 13.7%

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
January76.2%64.0%▼ 16.0%
February72.5%65.1%▼ 10.2%
March81.4%67.8%▼ 16.7%
April85.0%76.1%▼ 10.5%
May92.0%74.1%▼ 19.5%
June72.1%71.5%▼ 0.8%
July61.1%80.7%▲ 32.1%
August71.7%––
September84.5%––
October81.6%–in progress
November77.5%––
December69.7%––
Year-to-date average (Jan–Jul)77.2%71.3%▼ 7.6%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January422▲ 450.0%
February40▼ 100.0%
March026–
April119▲ 1,800.0%
May48▲ 100.0%
June412▲ 200.0%
July912▲ 33.3%
August15––
September3––
October0–in progress
November37––
December22––
Year to date (Jan–Jul)2699▲ 280.8%

Airlines on this route

  1. SkyWest Airlines 50.4%
  2. PSA Airlines 29.3%
  3. Envoy Air 13.6%
  4. Republic Airways 4.2%
  5. United Airlines 2.5%

Oct 1, 2024 – Jul 31, 2026

By direction

DAY → ORD

Scheduled flights
2,807
Flights operated
2,705
Cancelled
102 · 3.6%
On-time departures
79.8%

ORD → DAY

Scheduled flights
2,810
Flights operated
2,708
Cancelled
102 · 3.6%
On-time departures
72.4%

DAY → ORD and ORD → DAY counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
SkyWest Airlines OO 2,833 50.4% 77.4% 88
PSA Airlines OH 1,646 29.3% 68.7% 76
Envoy Air MQ 766 13.6% 82.4% 21
Republic Airways YX 234 4.2% 82.5% 17
United Airlines UA 138 2.5% 91.2% 2

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 delay08:00–09:004.3min · 418 recorded · 403 measured
Gap to highest-delay hour51.8min08:00 ↔ 19:00
Recorded flights5,617DAY–ORD

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 · 2 recorded · 2 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 193 recorded · 189 measured · Source: the US BTS 07:00 · 92.5% · 284 recorded · 279 measured · Source: the US BTS 08:00 · 90.1% · 418 recorded · 403 measured · Source: the US BTS 09:00 · 77.2% · 429 recorded · 412 measured · Source: the US BTS 10:00 · 82.9% · 430 recorded · 427 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 184 recorded · 171 measured · Source: the US BTS 12:00 · 73.5% · 369 recorded · 358 measured · Source: the US BTS 13:00 · 75.0% · 382 recorded · 372 measured · Source: the US BTS 14:00 · 73.0% · 772 recorded · 748 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 206 recorded · 197 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 191 recorded · 180 measured · Source: the US BTS 17:00 · 71.8% · 594 recorded · 574 measured · Source: the US BTS 18:00 · 75.9% · 409 recorded · 386 measured · Source: the US BTS 19:00 · 58.9% · 274 recorded · 258 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 184 recorded · 171 measured · Source: the US BTS 21:00 · 73.5% · 272 recorded · 264 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 24 recorded · 22 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 · 2 recorded · 2 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 193 recorded · 189 measured · Source: the US BTS 07:00 · 5.6 min · 284 recorded · 279 measured · Source: the US BTS 08:00 · 4.3 min · 418 recorded · 403 measured · Source: the US BTS 09:00 · 30.7 min · 429 recorded · 412 measured · Source: the US BTS 10:00 · 10.9 min · 430 recorded · 427 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 184 recorded · 171 measured · Source: the US BTS 12:00 · 23.3 min · 369 recorded · 358 measured · Source: the US BTS 13:00 · 24.1 min · 382 recorded · 372 measured · Source: the US BTS 14:00 · 26.8 min · 772 recorded · 748 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 206 recorded · 197 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 191 recorded · 180 measured · Source: the US BTS 17:00 · 23.9 min · 594 recorded · 574 measured · Source: the US BTS 18:00 · 29.0 min · 409 recorded · 386 measured · Source: the US BTS 19:00 · 56.1 min · 274 recorded · 258 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 184 recorded · 171 measured · Source: the US BTS 21:00 · 22.3 min · 272 recorded · 264 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 24 recorded · 22 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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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 · 2 · 2 recorded · 2 measured · Source: the US BTS 06:00 · 193 · 193 recorded · 189 measured · Source: the US BTS 07:00 · 284 · 284 recorded · 279 measured · Source: the US BTS 08:00 · 418 · 418 recorded · 403 measured · Source: the US BTS 09:00 · 429 · 429 recorded · 412 measured · Source: the US BTS 10:00 · 430 · 430 recorded · 427 measured · Source: the US BTS 11:00 · 184 · 184 recorded · 171 measured · Source: the US BTS 12:00 · 369 · 369 recorded · 358 measured · Source: the US BTS 13:00 · 382 · 382 recorded · 372 measured · Source: the US BTS 14:00 · 772 · 772 recorded · 748 measured · Source: the US BTS 15:00 · 206 · 206 recorded · 197 measured · Source: the US BTS 16:00 · 191 · 191 recorded · 180 measured · Source: the US BTS 17:00 · 594 · 594 recorded · 574 measured · Source: the US BTS 18:00 · 409 · 409 recorded · 386 measured · Source: the US BTS 19:00 · 274 · 274 recorded · 258 measured · Source: the US BTS 20:00 · 184 · 184 recorded · 171 measured · Source: the US BTS 21:00 · 272 · 272 recorded · 264 measured · Source: the US BTS 22:00 · 24 · 24 recorded · 22 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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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—22
06:00Fewer than 200 measured departures—189193
07:0092.5%5.6 min279284
08:0090.1%4.3 min403418
09:0077.2%30.7 min412429
10:0082.9%10.9 min427430
11:00Fewer than 200 measured departures—171184
12:0073.5%23.3 min358369
13:0075.0%24.1 min372382
14:0073.0%26.8 min748772
15:00Fewer than 200 measured departures—197206
16:00Fewer than 200 measured departures—180191
17:0071.8%23.9 min574594
18:0075.9%29.0 min386409
19:0058.9%56.1 min258274
20:00Fewer than 200 measured departures—171184
21:0073.5%22.3 min264272
22:00Fewer than 200 measured departures—2224
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 75.4% · 823 recorded · 773 measured · Source: the US BTS Tuesday · 75.7% · 810 recorded · 790 measured · Source: the US BTS Wednesday · 77.4% · 800 recorded · 778 measured · Source: the US BTS Thursday · 77.1% · 775 recorded · 754 measured · Source: the US BTS Friday · 75.3% · 818 recorded · 789 measured · Source: the US BTS Saturday · 79.0% · 774 recorded · 738 measured · Source: the US BTS Sunday · 73.1% · 817 recorded · 791 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 20.6 min · 823 recorded · 773 measured · Source: the US BTS Tuesday · 22.5 min · 810 recorded · 790 measured · Source: the US BTS Wednesday · 22.3 min · 800 recorded · 778 measured · Source: the US BTS Thursday · 22.2 min · 775 recorded · 754 measured · Source: the US BTS Friday · 24.1 min · 818 recorded · 789 measured · Source: the US BTS Saturday · 27.6 min · 774 recorded · 738 measured · Source: the US BTS Sunday · 26.4 min · 817 recorded · 791 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 823 · 823 recorded · 773 measured · Source: the US BTS Tuesday · 810 · 810 recorded · 790 measured · Source: the US BTS Wednesday · 800 · 800 recorded · 778 measured · Source: the US BTS Thursday · 775 · 775 recorded · 754 measured · Source: the US BTS Friday · 818 · 818 recorded · 789 measured · Source: the US BTS Saturday · 774 · 774 recorded · 738 measured · Source: the US BTS Sunday · 817 · 817 recorded · 791 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday75.4%20.6 min773823
Tuesday75.7%22.5 min790810
Wednesday77.4%22.3 min778800
Thursday77.1%22.2 min754775
Friday75.3%24.1 min789818
Saturday79.0%27.6 min738774
Sunday73.1%26.4 min791817

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 · 69.4% · 496 recorded · 470 measured · Source: the US BTS Feb · 68.7% · 457 recorded · 453 measured · Source: the US BTS Mar · 72.9% · 402 recorded · 376 measured · Source: the US BTS Apr · 79.8% · 549 recorded · 529 measured · Source: the US BTS May · 82.9% · 568 recorded · 556 measured · Source: the US BTS Jun · 71.8% · 623 recorded · 607 measured · Source: the US BTS Jul · 72.5% · 504 recorded · 483 measured · Source: the US BTS Aug · 71.7% · 241 recorded · 226 measured · Source: the US BTS Sep · 84.5% · 235 recorded · 232 measured · Source: the US BTS Oct · 83.0% · 482 recorded · 482 measured · Source: the US BTS Nov · 81.4% · 635 recorded · 596 measured · Source: the US BTS Dec · 73.5% · 425 recorded · 403 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 39.0 min · 496 recorded · 470 measured · Source: the US BTS Feb · 30.4 min · 457 recorded · 453 measured · Source: the US BTS Mar · 27.4 min · 402 recorded · 376 measured · Source: the US BTS Apr · 17.4 min · 549 recorded · 529 measured · Source: the US BTS May · 9.4 min · 568 recorded · 556 measured · Source: the US BTS Jun · 24.0 min · 623 recorded · 607 measured · Source: the US BTS Jul · 35.2 min · 504 recorded · 483 measured · Source: the US BTS Aug · 42.8 min · 241 recorded · 226 measured · Source: the US BTS Sep · 9.1 min · 235 recorded · 232 measured · Source: the US BTS Oct · 10.9 min · 482 recorded · 482 measured · Source: the US BTS Nov · 16.2 min · 635 recorded · 596 measured · Source: the US BTS Dec · 32.2 min · 425 recorded · 403 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 496 · 496 recorded · 470 measured · Source: the US BTS Feb · 457 · 457 recorded · 453 measured · Source: the US BTS Mar · 402 · 402 recorded · 376 measured · Source: the US BTS Apr · 549 · 549 recorded · 529 measured · Source: the US BTS May · 568 · 568 recorded · 556 measured · Source: the US BTS Jun · 623 · 623 recorded · 607 measured · Source: the US BTS Jul · 504 · 504 recorded · 483 measured · Source: the US BTS Aug · 241 · 241 recorded · 226 measured · Source: the US BTS Sep · 235 · 235 recorded · 232 measured · Source: the US BTS Oct · 482 · 482 recorded · 482 measured · Source: the US BTS Nov · 635 · 635 recorded · 596 measured · Source: the US BTS Dec · 425 · 425 recorded · 403 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan69.4%39.0 min470496
Feb68.7%30.4 min453457
Mar72.9%27.4 min376402
Apr79.8%17.4 min529549
May82.9%9.4 min556568
Jun71.8%24.0 min607623
Jul72.5%35.2 min483504
Aug71.7%42.8 min226241
Sep84.5%9.1 min232235
Oct83.0%10.9 min482482
Nov81.4%16.2 min596635
Dec73.5%32.2 min403425

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 73.3% 4,119
  • Delayed >15 min 23.0% 1,294
  • Cancelled 3.6% 204
  • 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

71
71 of 71
Flight numbersBy direction DeparturesOn time
OO4718 ORD → DAY 217 83.3%
OO5541 DAY → ORD 216 85.5%
OO5588 ORD → DAY 216 81.2%
OO4793 DAY → ORD 215 79.6%
OO5216 DAY → ORD 149 89.9%
OO5530 ORD → DAY 92 88.0%
OO5631 ORD → DAY 92 75.6%
OH5124 DAY → ORD 89 83.9%
MQ4311 ORD → DAY 72 78.6%
MQ4311 DAY → ORD 70 77.6%
OH5107 ORD → DAY 62 79.0%
OH5114 DAY → ORD 62 61.3%
OH5131 ORD → DAY 62 42.6%
OH5122 ORD → DAY 60 41.5%
OH5132 DAY → ORD 60 40.7%
OH5168 ORD → DAY 60 70.2%
OH5143 ORD → DAY 58 66.7%
OO4749 DAY → ORD 56 88.9%
OH5164 DAY → ORD 52 69.4%
OO5810 ORD → DAY 46 84.1%
OO4998 ORD → DAY 44 68.3%
OO4998 DAY → ORD 44 61.5%
OH5309 ORD → DAY 37 61.8%
OO4747 DAY → ORD 37 68.6%
OO5811 ORD → DAY 37 83.3%
OH5162 ORD → DAY 36 58.8%
OH5163 DAY → ORD 36 61.1%
OH5164 ORD → DAY 36 54.6%
OH5309 DAY → ORD 36 58.8%
OO4711 DAY → ORD 36 86.1%
OO4761 DAY → ORD 36 69.7%
OO4776 ORD → DAY 36 58.3%
OO5279 ORD → DAY 36 84.4%
OO5589 ORD → DAY 36 86.1%
OO5613 DAY → ORD 36 88.9%
UA1625 ORD → DAY 36 82.9%
UA2232 DAY → ORD 36 97.1%
MQ4213 ORD → DAY 35 75.8%
OO4675 DAY → ORD 35 94.3%
OO5229 DAY → ORD 35 64.7%
OO5312 ORD → DAY 35 64.7%
MQ4213 DAY → ORD 34 68.8%
OH5172 DAY → ORD 33 96.9%
MQ3340 DAY → ORD 32 96.9%
YX3405 DAY → ORD 32 96.4%
YX3505 ORD → DAY 32 71.0%
OO4924 DAY → ORD 31 83.9%
OO4967 ORD → DAY 31 71.0%
OO4969 ORD → DAY 31 89.7%
OO5806 DAY → ORD 31 82.1%
UA1946 ORD → DAY 31 83.9%
UA653 DAY → ORD 31 100.0%
MQ4062 ORD → DAY 30 74.1%
OH5154 DAY → ORD 30 92.9%
OH5204 DAY → ORD 30 83.3%
OH5233 DAY → ORD 30 65.4%
OH5249 DAY → ORD 30 88.9%
OH5262 ORD → DAY 30 72.4%
OH5265 ORD → DAY 30 53.9%
OH5555 ORD → DAY 30 59.3%
OH5557 DAY → ORD 30 90.0%
OH5643 ORD → DAY 30 80.0%
OO4921 ORD → DAY 30 51.7%
OO4921 DAY → ORD 30 51.9%
OO4923 ORD → DAY 30 83.3%
OO4942 DAY → ORD 30 100.0%
OO4972 ORD → DAY 30 55.2%
OO4974 DAY → ORD 30 86.2%
OO5008 ORD → DAY 30 72.4%
OO5008 DAY → ORD 30 78.6%
OO6343 DAY → ORD 30 93.3%

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 280 +37.9% 12 80.7%
June 2026 242 −33.7% 12 71.5%
May 2026 282 +2.9% 8 74.1%
April 2026 309 +40.5% 19 76.1%
March 2026 236 +68.6% 26 67.8%
February 2026 235 +7.8% 0 65.1%
January 2026 264 +28.2% 22 64.0%
December 2025 330 +352.1% 22 69.7%
November 2025 422 +142.5% 37 77.5%
October 2025 331 +119.2% 0 81.6%
September 2025 232 3 84.5%
August 2025 226 15 71.7%
July 2025 203 9 61.1%
June 2025 365 4 72.1%
May 2025 274 4 92.0%
April 2025 220 1 85.0%
March 2025 140 0 81.4%
February 2025 218 4 72.5%
January 2025 206 4 76.2%
December 2024 73 0 90.4%
November 2024 174 2 90.8%
October 2024 151 0 86.1%

How to read this chart

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