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541 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – John Glenn Columbus (CMH)

In July 2026, 174 flights operated between Baltimore/Washington International Thurgood Marshall and John Glenn Columbus (both directions), and 68.4% 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
January143133▼ 7.0%
February146134▼ 8.2%
March179182▲ 1.7%
April1741740.0%
May1761760.0%
June179174▼ 2.8%
July168174▲ 3.6%
August180––
September180––
October195–in progress
November181––
December188––
Year to date (Jan–Jul)1,1651,147▼ 1.5%

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
January86.7%79.7%▼ 8.1%
February79.5%84.3%▲ 6.0%
March82.7%73.1%▼ 11.6%
April82.8%80.5%▼ 2.8%
May77.8%72.7%▼ 6.6%
June68.7%73.6%▲ 7.1%
July68.5%68.4%▼ 0.1%
August83.3%––
September85.6%––
October75.9%–in progress
November82.3%––
December77.1%––
Year-to-date average (Jan–Jul)78.1%76.0%▼ 2.6%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January10100.0%
February08–
March10▼ 100.0%
April00–
May01–
June12▲ 100.0%
July167▼ 56.3%
August4––
September0––
October0–in progress
November0––
December1––
Year to date (Jan–Jul)28280.0%

By direction

BWI → CMH

Scheduled flights
1,905
Flights operated
1,874
Cancelled
31 · 1.6%
On-time departures
71.2%

CMH → BWI

Scheduled flights
1,898
Flights operated
1,868
Cancelled
30 · 1.6%
On-time departures
85.7%

BWI → CMH and CMH → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 3,803 100.0% 78.4% 61

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 delay06:00–07:00-2.0min · 254 recorded · 253 measured
Gap to highest-delay hour29.8min06:00 ↔ 22:00
Recorded flights3,803BWI–CMH

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 · 98.1% · 372 recorded · 366 measured · Source: the US BTS 06:00 · 98.0% · 254 recorded · 253 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 12 recorded · 12 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 142 recorded · 140 measured · Source: the US BTS 09:00 · 89.4% · 325 recorded · 322 measured · Source: the US BTS 10:00 · 85.2% · 464 recorded · 459 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 160 recorded · 159 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 58 recorded · 57 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 131 recorded · 128 measured · Source: the US BTS 15:00 · 75.3% · 283 recorded · 279 measured · Source: the US BTS 16:00 · 61.9% · 362 recorded · 354 measured · Source: the US BTS 17:00 · 61.4% · 288 recorded · 282 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 114 recorded · 112 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 82 recorded · 80 measured · Source: the US BTS 20:00 · 72.2% · 233 recorded · 230 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 152 recorded · 151 measured · Source: the US BTS 22:00 · 53.9% · 266 recorded · 254 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 · -1.3 min · 372 recorded · 366 measured · Source: the US BTS 06:00 · -2.0 min · 254 recorded · 253 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 12 recorded · 12 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 142 recorded · 140 measured · Source: the US BTS 09:00 · 4.5 min · 325 recorded · 322 measured · Source: the US BTS 10:00 · 7.8 min · 464 recorded · 459 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 160 recorded · 159 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 58 recorded · 57 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 131 recorded · 128 measured · Source: the US BTS 15:00 · 11.5 min · 283 recorded · 279 measured · Source: the US BTS 16:00 · 22.3 min · 362 recorded · 354 measured · Source: the US BTS 17:00 · 26.7 min · 288 recorded · 282 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 114 recorded · 112 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 82 recorded · 80 measured · Source: the US BTS 20:00 · 12.3 min · 233 recorded · 230 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 152 recorded · 151 measured · Source: the US BTS 22:00 · 27.9 min · 266 recorded · 254 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 · 372 · 372 recorded · 366 measured · Source: the US BTS 06:00 · 254 · 254 recorded · 253 measured · Source: the US BTS 07:00 · 12 · 12 recorded · 12 measured · Source: the US BTS 08:00 · 142 · 142 recorded · 140 measured · Source: the US BTS 09:00 · 325 · 325 recorded · 322 measured · Source: the US BTS 10:00 · 464 · 464 recorded · 459 measured · Source: the US BTS 11:00 · 160 · 160 recorded · 159 measured · Source: the US BTS 12:00 · 105 · 105 recorded · 104 measured · Source: the US BTS 13:00 · 58 · 58 recorded · 57 measured · Source: the US BTS 14:00 · 131 · 131 recorded · 128 measured · Source: the US BTS 15:00 · 283 · 283 recorded · 279 measured · Source: the US BTS 16:00 · 362 · 362 recorded · 354 measured · Source: the US BTS 17:00 · 288 · 288 recorded · 282 measured · Source: the US BTS 18:00 · 114 · 114 recorded · 112 measured · Source: the US BTS 19:00 · 82 · 82 recorded · 80 measured · Source: the US BTS 20:00 · 233 · 233 recorded · 230 measured · Source: the US BTS 21:00 · 152 · 152 recorded · 151 measured · Source: the US BTS 22:00 · 266 · 266 recorded · 254 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———
05:0098.1%-1.3 min366372
06:0098.0%-2.0 min253254
07:00Fewer than 200 measured departures—1212
08:00Fewer than 200 measured departures—140142
09:0089.4%4.5 min322325
10:0085.2%7.8 min459464
11:00Fewer than 200 measured departures—159160
12:00Fewer than 200 measured departures—104105
13:00Fewer than 200 measured departures—5758
14:00Fewer than 200 measured departures—128131
15:0075.3%11.5 min279283
16:0061.9%22.3 min354362
17:0061.4%26.7 min282288
18:00Fewer than 200 measured departures—112114
19:00Fewer than 200 measured departures—8082
20:0072.2%12.3 min230233
21:00Fewer than 200 measured departures—151152
22:0053.9%27.9 min254266
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 76.5% · 561 recorded · 549 measured · Source: the US BTS Tuesday · 83.7% · 534 recorded · 528 measured · Source: the US BTS Wednesday · 83.8% · 530 recorded · 524 measured · Source: the US BTS Thursday · 79.5% · 553 recorded · 546 measured · Source: the US BTS Friday · 78.6% · 556 recorded · 551 measured · Source: the US BTS Saturday · 77.9% · 499 recorded · 494 measured · Source: the US BTS Sunday · 69.3% · 570 recorded · 550 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 · 11.7 min · 561 recorded · 549 measured · Source: the US BTS Tuesday · 6.3 min · 534 recorded · 528 measured · Source: the US BTS Wednesday · 7.2 min · 530 recorded · 524 measured · Source: the US BTS Thursday · 12.2 min · 553 recorded · 546 measured · Source: the US BTS Friday · 11.7 min · 556 recorded · 551 measured · Source: the US BTS Saturday · 12.1 min · 499 recorded · 494 measured · Source: the US BTS Sunday · 19.4 min · 570 recorded · 550 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 · 561 · 561 recorded · 549 measured · Source: the US BTS Tuesday · 534 · 534 recorded · 528 measured · Source: the US BTS Wednesday · 530 · 530 recorded · 524 measured · Source: the US BTS Thursday · 553 · 553 recorded · 546 measured · Source: the US BTS Friday · 556 · 556 recorded · 551 measured · Source: the US BTS Saturday · 499 · 499 recorded · 494 measured · Source: the US BTS Sunday · 570 · 570 recorded · 550 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday76.5%11.7 min549561
Tuesday83.7%6.3 min528534
Wednesday83.8%7.2 min524530
Thursday79.5%12.2 min546553
Friday78.6%11.7 min551556
Saturday77.9%12.1 min494499
Sunday69.3%19.4 min550570

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 · 83.3% · 296 recorded · 276 measured · Source: the US BTS Feb · 81.8% · 288 recorded · 280 measured · Source: the US BTS Mar · 77.8% · 362 recorded · 361 measured · Source: the US BTS Apr · 81.6% · 348 recorded · 348 measured · Source: the US BTS May · 75.3% · 353 recorded · 352 measured · Source: the US BTS Jun · 71.1% · 356 recorded · 353 measured · Source: the US BTS Jul · 68.4% · 365 recorded · 342 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 184 recorded · 180 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 78.2% · 335 recorded · 335 measured · Source: the US BTS Nov · 85.9% · 361 recorded · 361 measured · Source: the US BTS Dec · 75.9% · 375 recorded · 374 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 · 4.7 min · 296 recorded · 276 measured · Source: the US BTS Feb · 8.6 min · 288 recorded · 280 measured · Source: the US BTS Mar · 15.5 min · 362 recorded · 361 measured · Source: the US BTS Apr · 6.8 min · 348 recorded · 348 measured · Source: the US BTS May · 13.7 min · 353 recorded · 352 measured · Source: the US BTS Jun · 17.8 min · 356 recorded · 353 measured · Source: the US BTS Jul · 22.6 min · 365 recorded · 342 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 184 recorded · 180 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 9.5 min · 335 recorded · 335 measured · Source: the US BTS Nov · 7.6 min · 361 recorded · 361 measured · Source: the US BTS Dec · 11.8 min · 375 recorded · 374 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 · 296 · 296 recorded · 276 measured · Source: the US BTS Feb · 288 · 288 recorded · 280 measured · Source: the US BTS Mar · 362 · 362 recorded · 361 measured · Source: the US BTS Apr · 348 · 348 recorded · 348 measured · Source: the US BTS May · 353 · 353 recorded · 352 measured · Source: the US BTS Jun · 356 · 356 recorded · 353 measured · Source: the US BTS Jul · 365 · 365 recorded · 342 measured · Source: the US BTS Aug · 184 · 184 recorded · 180 measured · Source: the US BTS Sep · 180 · 180 recorded · 180 measured · Source: the US BTS Oct · 335 · 335 recorded · 335 measured · Source: the US BTS Nov · 361 · 361 recorded · 361 measured · Source: the US BTS Dec · 375 · 375 recorded · 374 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan83.3%4.7 min276296
Feb81.8%8.6 min280288
Mar77.8%15.5 min361362
Apr81.6%6.8 min348348
May75.3%13.7 min352353
Jun71.1%17.8 min353356
Jul68.4%22.6 min342365
AugFewer than 200 measured departures—180184
SepFewer than 200 measured departures—180180
Oct78.2%9.5 min335335
Nov85.9%7.6 min361361
Dec75.9%11.8 min374375

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 77.1% 2,934
  • Delayed >15 min 21.2% 808
  • Cancelled 1.6% 61
  • 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

46
46 of 46
Flight numbersBy direction DeparturesOn time
WN410 CMH → BWI 123 95.8%
WN4691 BWI → CMH 121 78.8%
WN1576 CMH → BWI 79 92.3%
WN1923 CMH → BWI 61 100.0%
WN2301 BWI → CMH 61 43.6%
WN1749 CMH → BWI 60 95.0%
WN1106 CMH → BWI 58 96.3%
WN1160 CMH → BWI 58 94.8%
WN1604 CMH → BWI 58 87.7%
WN1678 BWI → CMH 58 89.5%
WN1992 BWI → CMH 58 72.4%
WN2031 CMH → BWI 58 100.0%
WN2393 BWI → CMH 58 82.8%
WN2793 BWI → CMH 58 93.1%
WN3052 BWI → CMH 58 50.0%
WN3423 CMH → BWI 58 48.3%
WN4376 CMH → BWI 58 98.3%
WN4415 BWI → CMH 58 77.8%
WN746 CMH → BWI 58 100.0%
WN909 CMH → BWI 58 94.8%
WN1352 CMH → BWI 57 79.0%
WN3163 BWI → CMH 57 79.0%
WN4157 BWI → CMH 57 48.2%
WN1284 CMH → BWI 56 78.2%
WN4418 CMH → BWI 55 82.7%
WN981 CMH → BWI 52 90.2%
WN843 BWI → CMH 50 79.6%
WN1647 BWI → CMH 45 77.8%
WN1034 CMH → BWI 42 38.5%
WN2162 CMH → BWI 42 95.2%
WN2182 BWI → CMH 42 71.4%
WN3339 BWI → CMH 42 45.0%
WN3853 BWI → CMH 42 66.7%
WN674 CMH → BWI 42 59.0%
WN4524 BWI → CMH 41 82.9%
WN921 BWI → CMH 41 60.0%
WN1653 BWI → CMH 40 55.0%
WN4298 CMH → BWI 35 77.1%
WN2720 BWI → CMH 33 90.9%
WN3029 BWI → CMH 33 90.6%
WN4026 CMH → BWI 33 57.6%
WN4339 BWI → CMH 33 66.7%
WN4652 BWI → CMH 33 51.5%
WN523 CMH → BWI 33 100.0%
WN547 CMH → BWI 33 97.0%
WN3630 BWI → CMH 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 174 +3.6% 7 68.4%
June 2026 174 −2.8% 2 73.6%
May 2026 176 +0.0% 1 72.7%
April 2026 174 +0.0% 0 80.5%
March 2026 182 +1.7% 0 73.1%
February 2026 134 −8.2% 8 84.3%
January 2026 133 −7.0% 10 79.7%
December 2025 188 +1.1% 1 77.1%
November 2025 181 +0.6% 0 82.3%
October 2025 195 +39.3% 0 75.9%
September 2025 180 0 85.6%
August 2025 180 4 83.3%
July 2025 168 16 68.5%
June 2025 179 1 68.7%
May 2025 176 0 77.8%
April 2025 174 0 82.8%
March 2025 179 1 82.7%
February 2025 146 0 79.5%
January 2025 143 10 86.7%
December 2024 186 0 74.7%
November 2024 180 0 89.4%
October 2024 140 0 81.4%

How to read this chart

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