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252 km · Domestic

Decatur (DEC) – Chicago O'Hare (ORD)

In July 2026, 101 flights operated between Decatur and Chicago O'Hare (both directions), and 81.2% 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
January105100▼ 4.8%
February9496▲ 2.1%
March10690▼ 15.1%
April10196▼ 5.0%
May105104▼ 1.0%
June10496▼ 7.7%
July1011010.0%
August103––
September102––
October108–in progress
November94––
December103––
Year to date (Jan–Jul)716683▼ 4.6%

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
January80.0%65.0%▼ 18.8%
February69.1%78.1%▲ 13.0%
March79.2%82.2%▲ 3.8%
April88.1%70.8%▼ 19.6%
May94.3%72.1%▼ 23.5%
June82.7%79.2%▼ 4.2%
July79.2%81.2%▲ 2.5%
August80.6%––
September84.3%––
October84.3%–in progress
November74.5%––
December66.0%––
Year-to-date average (Jan–Jul)81.8%75.5%▼ 7.7%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January36▲ 100.0%
February20▼ 100.0%
March016–
April18▲ 700.0%
May12▲ 100.0%
June06–
July57▲ 40.0%
August3––
September0––
October0–in progress
November6––
December7––
Year to date (Jan–Jul)1245▲ 275.0%

By direction

DEC → ORD

Scheduled flights
1,130
Flights operated
1,088
Cancelled
42 · 3.7%
On-time departures
81.8%

ORD → DEC

Scheduled flights
1,130
Flights operated
1,099
Cancelled
31 · 2.7%
On-time departures
76.4%

DEC → ORD and ORD → DEC counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
SkyWest Airlines OO 2,260 100.0% 79.1% 73

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 delay07:00–08:007.2min · 464 recorded · 458 measured
Gap to highest-delay hour21.0min07:00 ↔ 16:00
Recorded flights2,260DEC–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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 82.8% · 464 recorded · 458 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · 87.6% · 458 recorded · 451 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 58 recorded · 58 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 32 recorded · 31 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 138 recorded · 136 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 32 recorded · 32 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 163 recorded · 161 measured · Source: the US BTS 16:00 · 67.4% · 380 recorded · 359 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 39 recorded · 38 measured · Source: the US BTS 18:00 · 80.9% · 229 recorded · 215 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 215 recorded · 196 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 7.2 min · 464 recorded · 458 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · 9.7 min · 458 recorded · 451 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 58 recorded · 58 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 32 recorded · 31 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 138 recorded · 136 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 32 recorded · 32 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 163 recorded · 161 measured · Source: the US BTS 16:00 · 28.2 min · 380 recorded · 359 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 39 recorded · 38 measured · Source: the US BTS 18:00 · 16.9 min · 229 recorded · 215 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 215 recorded · 196 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 464 · 464 recorded · 458 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · 458 · 458 recorded · 451 measured · Source: the US BTS 10:00 · 58 · 58 recorded · 58 measured · Source: the US BTS 11:00 · 52 · 52 recorded · 52 measured · Source: the US BTS 12:00 · 32 · 32 recorded · 31 measured · Source: the US BTS 13:00 · 138 · 138 recorded · 136 measured · Source: the US BTS 14:00 · 32 · 32 recorded · 32 measured · Source: the US BTS 15:00 · 163 · 163 recorded · 161 measured · Source: the US BTS 16:00 · 380 · 380 recorded · 359 measured · Source: the US BTS 17:00 · 39 · 39 recorded · 38 measured · Source: the US BTS 18:00 · 229 · 229 recorded · 215 measured · Source: the US BTS 19:00 · 215 · 215 recorded · 196 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 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———
05:00No observations———
06:00No observations———
07:0082.8%7.2 min458464
08:00No observations———
09:0087.6%9.7 min451458
10:00Fewer than 200 measured departures—5858
11:00Fewer than 200 measured departures—5252
12:00Fewer than 200 measured departures—3132
13:00Fewer than 200 measured departures—136138
14:00Fewer than 200 measured departures—3232
15:00Fewer than 200 measured departures—161163
16:0067.4%28.2 min359380
17:00Fewer than 200 measured departures—3839
18:0080.9%16.9 min215229
19:00Fewer than 200 measured departures—196215
20:00No observations———
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 81.2% · 376 recorded · 361 measured · Source: the US BTS Tuesday · Fewer than 200 measured departures · 196 recorded · 193 measured · Source: the US BTS Wednesday · 78.7% · 372 recorded · 362 measured · Source: the US BTS Thursday · 81.3% · 368 recorded · 358 measured · Source: the US BTS Friday · 81.4% · 376 recorded · 366 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 196 recorded · 186 measured · Source: the US BTS Sunday · 74.8% · 376 recorded · 361 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 · 18.3 min · 376 recorded · 361 measured · Source: the US BTS Tuesday · Fewer than 200 measured departures · 196 recorded · 193 measured · Source: the US BTS Wednesday · 19.0 min · 372 recorded · 362 measured · Source: the US BTS Thursday · 14.6 min · 368 recorded · 358 measured · Source: the US BTS Friday · 12.8 min · 376 recorded · 366 measured · Source: the US BTS Saturday · Fewer than 200 measured departures · 196 recorded · 186 measured · Source: the US BTS Sunday · 19.5 min · 376 recorded · 361 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 · 376 · 376 recorded · 361 measured · Source: the US BTS Tuesday · 196 · 196 recorded · 193 measured · Source: the US BTS Wednesday · 372 · 372 recorded · 362 measured · Source: the US BTS Thursday · 368 · 368 recorded · 358 measured · Source: the US BTS Friday · 376 · 376 recorded · 366 measured · Source: the US BTS Saturday · 196 · 196 recorded · 186 measured · Source: the US BTS Sunday · 376 · 376 recorded · 361 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday81.2%18.3 min361376
TuesdayFewer than 200 measured departures—193196
Wednesday78.7%19.0 min362372
Thursday81.3%14.6 min358368
Friday81.4%12.8 min366376
SaturdayFewer than 200 measured departures—186196
Sunday74.8%19.5 min361376

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 · 72.7% · 214 recorded · 205 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 192 recorded · 190 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 212 recorded · 196 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 206 recorded · 197 measured · Source: the US BTS May · 83.3% · 212 recorded · 209 measured · Source: the US BTS Jun · 81.0% · 206 recorded · 200 measured · Source: the US BTS Jul · 80.2% · 214 recorded · 202 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 106 recorded · 103 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 102 recorded · 102 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 176 recorded · 176 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 204 recorded · 198 measured · Source: the US BTS Dec · 70.8% · 216 recorded · 209 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 · 26.1 min · 214 recorded · 205 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 192 recorded · 190 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 212 recorded · 196 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 206 recorded · 197 measured · Source: the US BTS May · 19.5 min · 212 recorded · 209 measured · Source: the US BTS Jun · 17.4 min · 206 recorded · 200 measured · Source: the US BTS Jul · 14.7 min · 214 recorded · 202 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 106 recorded · 103 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 102 recorded · 102 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 176 recorded · 176 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 204 recorded · 198 measured · Source: the US BTS Dec · 26.5 min · 216 recorded · 209 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 · 214 · 214 recorded · 205 measured · Source: the US BTS Feb · 192 · 192 recorded · 190 measured · Source: the US BTS Mar · 212 · 212 recorded · 196 measured · Source: the US BTS Apr · 206 · 206 recorded · 197 measured · Source: the US BTS May · 212 · 212 recorded · 209 measured · Source: the US BTS Jun · 206 · 206 recorded · 200 measured · Source: the US BTS Jul · 214 · 214 recorded · 202 measured · Source: the US BTS Aug · 106 · 106 recorded · 103 measured · Source: the US BTS Sep · 102 · 102 recorded · 102 measured · Source: the US BTS Oct · 176 · 176 recorded · 176 measured · Source: the US BTS Nov · 204 · 204 recorded · 198 measured · Source: the US BTS Dec · 216 · 216 recorded · 209 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan72.7%26.1 min205214
FebFewer than 200 measured departures—190192
MarFewer than 200 measured departures—196212
AprFewer than 200 measured departures—197206
May83.3%19.5 min209212
Jun81.0%17.4 min200206
Jul80.2%14.7 min202214
AugFewer than 200 measured departures—103106
SepFewer than 200 measured departures—102102
OctFewer than 200 measured departures—176176
NovFewer than 200 measured departures—198204
Dec70.8%26.5 min209216

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 76.5% 1,730
  • Delayed >15 min 20.2% 457
  • Cancelled 3.2% 73
  • 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

19
19 of 19
Flight numbersBy direction DeparturesOn time
OO5064 DEC → ORD 468 76.7%
OO5027 DEC → ORD 421 85.5%
OO5037 ORD → DEC 154 87.7%
OO5064 ORD → DEC 127 59.8%
OO5134 ORD → DEC 102 79.2%
OO5121 ORD → DEC 97 83.3%
OO5027 ORD → DEC 70 79.7%
OO5122 ORD → DEC 59 77.6%
OO5067 ORD → DEC 57 81.5%
OO5037 DEC → ORD 54 88.7%
OO5100 ORD → DEC 39 55.3%
OO5028 DEC → ORD 37 88.6%
OO5111 ORD → DEC 36 88.9%
OO5032 ORD → DEC 35 54.6%
OO5123 ORD → DEC 35 77.1%
OO6077 DEC → ORD 35 67.7%
OO5017 DEC → ORD 32 81.5%
OO5081 ORD → DEC 32 93.6%
OO5062 ORD → DEC 31 83.9%

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 101 +0.0% 7 81.2%
June 2026 96 −7.7% 6 79.2%
May 2026 104 −1.0% 2 72.1%
April 2026 96 −5.0% 8 70.8%
March 2026 90 −15.1% 16 82.2%
February 2026 96 +2.1% 0 78.1%
January 2026 100 −4.8% 6 65.0%
December 2025 103 −2.8% 7 66.0%
November 2025 94 −9.6% 6 74.5%
October 2025 108 +58.8% 0 84.3%
September 2025 102 0 84.3%
August 2025 103 3 80.6%
July 2025 101 5 79.2%
June 2025 104 0 82.7%
May 2025 105 1 94.3%
April 2025 101 1 88.1%
March 2025 106 0 79.2%
February 2025 94 2 69.1%
January 2025 105 3 80.0%
December 2024 106 0 75.5%
November 2024 104 0 81.7%
October 2024 68 0 95.6%

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