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2,003 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – William P. Hobby (HOU)

In July 2026, 288 flights operated between Baltimore/Washington International Thurgood Marshall and William P. Hobby (both directions), and 58.0% 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
January192197▲ 2.6%
February194192▼ 1.0%
March242238▼ 1.7%
April238240▲ 0.8%
May244248▲ 1.6%
June243229▼ 5.8%
July245288▲ 17.6%
August254––
September249––
October260–in progress
November253––
December258––
Year to date (Jan–Jul)1,5981,632▲ 2.1%

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
January80.2%82.7%▲ 3.1%
February82.5%74.5%▼ 9.7%
March83.1%55.5%▼ 33.2%
April76.5%72.5%▼ 5.2%
May73.8%69.4%▼ 6.0%
June64.6%63.3%▼ 2.0%
July64.5%58.0%▼ 10.1%
August72.0%––
September79.9%––
October72.3%–in progress
November72.3%––
December70.5%––
Year-to-date average (Jan–Jul)75.0%68.0%▼ 9.4%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January198▼ 57.9%
February15▲ 400.0%
March25▲ 150.0%
April20▼ 100.0%
May20▼ 100.0%
June64▼ 33.3%
July115▼ 54.5%
August2––
September0––
October0–in progress
November6––
December6––
Year to date (Jan–Jul)4327▼ 37.2%

By direction

BWI → HOU

Scheduled flights
2,619
Flights operated
2,578
Cancelled
41 · 1.6%
On-time departures
69.8%

HOU → BWI

Scheduled flights
2,640
Flights operated
2,596
Cancelled
44 · 1.7%
On-time departures
75.2%

BWI → HOU and HOU → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 5,259 100.0% 72.5% 85

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 delay06:00–07:000.7min · 562 recorded · 552 measured
Gap to highest-delay hour29.3min06:00 ↔ 19:00
Recorded flights5,259BWI–HOU

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 · 93.7% · 434 recorded · 430 measured · Source: the US BTS 06:00 · 96.0% · 562 recorded · 552 measured · Source: the US BTS 07:00 · 88.4% · 354 recorded · 354 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 135 recorded · 134 measured · Source: the US BTS 09:00 · 81.5% · 241 recorded · 238 measured · Source: the US BTS 10:00 · 78.2% · 415 recorded · 412 measured · Source: the US BTS 11:00 · 78.2% · 312 recorded · 307 measured · Source: the US BTS 12:00 · 77.5% · 207 recorded · 204 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 110 recorded · 107 measured · Source: the US BTS 15:00 · 68.3% · 336 recorded · 325 measured · Source: the US BTS 16:00 · 58.9% · 250 recorded · 246 measured · Source: the US BTS 17:00 · 60.5% · 384 recorded · 372 measured · Source: the US BTS 18:00 · 57.2% · 409 recorded · 402 measured · Source: the US BTS 19:00 · 46.8% · 236 recorded · 233 measured · Source: the US BTS 20:00 · 57.7% · 501 recorded · 492 measured · Source: the US BTS 21:00 · 50.0% · 287 recorded · 280 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 5 recorded · 5 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 · 1.5 min · 434 recorded · 430 measured · Source: the US BTS 06:00 · 0.7 min · 562 recorded · 552 measured · Source: the US BTS 07:00 · 5.1 min · 354 recorded · 354 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 135 recorded · 134 measured · Source: the US BTS 09:00 · 10.5 min · 241 recorded · 238 measured · Source: the US BTS 10:00 · 10.3 min · 415 recorded · 412 measured · Source: the US BTS 11:00 · 10.4 min · 312 recorded · 307 measured · Source: the US BTS 12:00 · 16.3 min · 207 recorded · 204 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 110 recorded · 107 measured · Source: the US BTS 15:00 · 17.1 min · 336 recorded · 325 measured · Source: the US BTS 16:00 · 23.0 min · 250 recorded · 246 measured · Source: the US BTS 17:00 · 20.4 min · 384 recorded · 372 measured · Source: the US BTS 18:00 · 23.7 min · 409 recorded · 402 measured · Source: the US BTS 19:00 · 30.0 min · 236 recorded · 233 measured · Source: the US BTS 20:00 · 25.2 min · 501 recorded · 492 measured · Source: the US BTS 21:00 · 29.4 min · 287 recorded · 280 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 5 recorded · 5 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 · 434 · 434 recorded · 430 measured · Source: the US BTS 06:00 · 562 · 562 recorded · 552 measured · Source: the US BTS 07:00 · 354 · 354 recorded · 354 measured · Source: the US BTS 08:00 · 135 · 135 recorded · 134 measured · Source: the US BTS 09:00 · 241 · 241 recorded · 238 measured · Source: the US BTS 10:00 · 415 · 415 recorded · 412 measured · Source: the US BTS 11:00 · 312 · 312 recorded · 307 measured · Source: the US BTS 12:00 · 207 · 207 recorded · 204 measured · Source: the US BTS 13:00 · 81 · 81 recorded · 81 measured · Source: the US BTS 14:00 · 110 · 110 recorded · 107 measured · Source: the US BTS 15:00 · 336 · 336 recorded · 325 measured · Source: the US BTS 16:00 · 250 · 250 recorded · 246 measured · Source: the US BTS 17:00 · 384 · 384 recorded · 372 measured · Source: the US BTS 18:00 · 409 · 409 recorded · 402 measured · Source: the US BTS 19:00 · 236 · 236 recorded · 233 measured · Source: the US BTS 20:00 · 501 · 501 recorded · 492 measured · Source: the US BTS 21:00 · 287 · 287 recorded · 280 measured · Source: the US BTS 22:00 · 5 · 5 recorded · 5 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———
05:0093.7%1.5 min430434
06:0096.0%0.7 min552562
07:0088.4%5.1 min354354
08:00Fewer than 200 measured departures—134135
09:0081.5%10.5 min238241
10:0078.2%10.3 min412415
11:0078.2%10.4 min307312
12:0077.5%16.3 min204207
13:00Fewer than 200 measured departures—8181
14:00Fewer than 200 measured departures—107110
15:0068.3%17.1 min325336
16:0058.9%23.0 min246250
17:0060.5%20.4 min372384
18:0057.2%23.7 min402409
19:0046.8%30.0 min233236
20:0057.7%25.2 min492501
21:0050.0%29.4 min280287
22:00Fewer than 200 measured departures—55
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 69.9% · 744 recorded · 721 measured · Source: the US BTS Tuesday · 79.4% · 726 recorded · 713 measured · Source: the US BTS Wednesday · 76.3% · 722 recorded · 714 measured · Source: the US BTS Thursday · 70.1% · 734 recorded · 728 measured · Source: the US BTS Friday · 73.3% · 746 recorded · 733 measured · Source: the US BTS Saturday · 71.0% · 753 recorded · 749 measured · Source: the US BTS Sunday · 68.3% · 834 recorded · 816 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 · 16.9 min · 744 recorded · 721 measured · Source: the US BTS Tuesday · 11.5 min · 726 recorded · 713 measured · Source: the US BTS Wednesday · 10.5 min · 722 recorded · 714 measured · Source: the US BTS Thursday · 16.8 min · 734 recorded · 728 measured · Source: the US BTS Friday · 15.0 min · 746 recorded · 733 measured · Source: the US BTS Saturday · 15.6 min · 753 recorded · 749 measured · Source: the US BTS Sunday · 17.7 min · 834 recorded · 816 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 · 744 · 744 recorded · 721 measured · Source: the US BTS Tuesday · 726 · 726 recorded · 713 measured · Source: the US BTS Wednesday · 722 · 722 recorded · 714 measured · Source: the US BTS Thursday · 734 · 734 recorded · 728 measured · Source: the US BTS Friday · 746 · 746 recorded · 733 measured · Source: the US BTS Saturday · 753 · 753 recorded · 749 measured · Source: the US BTS Sunday · 834 · 834 recorded · 816 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday69.9%16.9 min721744
Tuesday79.4%11.5 min713726
Wednesday76.3%10.5 min714722
Thursday70.1%16.8 min728734
Friday73.3%15.0 min733746
Saturday71.0%15.6 min749753
Sunday68.3%17.7 min816834

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 · 81.5% · 416 recorded · 389 measured · Source: the US BTS Feb · 78.5% · 392 recorded · 386 measured · Source: the US BTS Mar · 69.4% · 487 recorded · 480 measured · Source: the US BTS Apr · 74.5% · 480 recorded · 478 measured · Source: the US BTS May · 71.5% · 494 recorded · 492 measured · Source: the US BTS Jun · 64.0% · 482 recorded · 472 measured · Source: the US BTS Jul · 61.0% · 549 recorded · 533 measured · Source: the US BTS Aug · 72.1% · 256 recorded · 254 measured · Source: the US BTS Sep · 79.9% · 249 recorded · 249 measured · Source: the US BTS Oct · 73.7% · 426 recorded · 426 measured · Source: the US BTS Nov · 79.8% · 501 recorded · 494 measured · Source: the US BTS Dec · 71.6% · 527 recorded · 521 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 · 8.5 min · 416 recorded · 389 measured · Source: the US BTS Feb · 10.1 min · 392 recorded · 386 measured · Source: the US BTS Mar · 17.2 min · 487 recorded · 480 measured · Source: the US BTS Apr · 11.8 min · 480 recorded · 478 measured · Source: the US BTS May · 15.5 min · 494 recorded · 492 measured · Source: the US BTS Jun · 20.5 min · 482 recorded · 472 measured · Source: the US BTS Jul · 26.5 min · 549 recorded · 533 measured · Source: the US BTS Aug · 15.8 min · 256 recorded · 254 measured · Source: the US BTS Sep · 10.2 min · 249 recorded · 249 measured · Source: the US BTS Oct · 11.1 min · 426 recorded · 426 measured · Source: the US BTS Nov · 10.1 min · 501 recorded · 494 measured · Source: the US BTS Dec · 16.3 min · 527 recorded · 521 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 · 416 · 416 recorded · 389 measured · Source: the US BTS Feb · 392 · 392 recorded · 386 measured · Source: the US BTS Mar · 487 · 487 recorded · 480 measured · Source: the US BTS Apr · 480 · 480 recorded · 478 measured · Source: the US BTS May · 494 · 494 recorded · 492 measured · Source: the US BTS Jun · 482 · 482 recorded · 472 measured · Source: the US BTS Jul · 549 · 549 recorded · 533 measured · Source: the US BTS Aug · 256 · 256 recorded · 254 measured · Source: the US BTS Sep · 249 · 249 recorded · 249 measured · Source: the US BTS Oct · 426 · 426 recorded · 426 measured · Source: the US BTS Nov · 501 · 501 recorded · 494 measured · Source: the US BTS Dec · 527 · 527 recorded · 521 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan81.5%8.5 min389416
Feb78.5%10.1 min386392
Mar69.4%17.2 min480487
Apr74.5%11.8 min478480
May71.5%15.5 min492494
Jun64.0%20.5 min472482
Jul61.0%26.5 min533549
Aug72.1%15.8 min254256
Sep79.9%10.2 min249249
Oct73.7%11.1 min426426
Nov79.8%10.1 min494501
Dec71.6%16.3 min521527

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 71.3% 3,751
  • Delayed >15 min 27.1% 1,423
  • Cancelled 1.6% 85
  • 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

73
73 of 73
Flight numbersBy direction DeparturesOn time
WN3129 BWI → HOU 123 93.3%
WN1955 BWI → HOU 116 83.3%
WN3615 HOU → BWI 106 79.4%
WN153 HOU → BWI 100 96.9%
WN4412 HOU → BWI 100 67.4%
WN2846 BWI → HOU 69 72.1%
WN2884 HOU → BWI 66 84.9%
WN354 BWI → HOU 65 75.0%
WN523 HOU → BWI 64 66.7%
WN2882 HOU → BWI 63 74.6%
WN4669 BWI → HOU 63 50.0%
WN1332 HOU → BWI 61 93.3%
WN1711 BWI → HOU 61 45.8%
WN526 BWI → HOU 61 60.0%
WN1822 HOU → BWI 60 45.6%
WN4760 BWI → HOU 60 75.0%
WN1111 HOU → BWI 58 87.7%
WN1547 BWI → HOU 58 91.4%
WN2008 BWI → HOU 58 87.9%
WN2103 BWI → HOU 58 70.2%
WN2303 HOU → BWI 58 74.1%
WN2304 HOU → BWI 58 63.8%
WN2550 HOU → BWI 58 67.2%
WN3174 BWI → HOU 58 74.1%
WN3797 HOU → BWI 58 91.2%
WN3916 BWI → HOU 58 52.6%
WN497 HOU → BWI 58 98.3%
WN503 HOU → BWI 58 94.8%
WN702 HOU → BWI 58 70.7%
WN1960 HOU → BWI 57 66.1%
WN1961 HOU → BWI 57 47.4%
WN3246 BWI → HOU 57 87.7%
WN3547 BWI → HOU 57 42.1%
WN4706 HOU → BWI 57 67.9%
WN562 BWI → HOU 57 73.7%
WN2241 HOU → BWI 54 79.6%
WN1250 BWI → HOU 52 76.0%
WN836 HOU → BWI 52 49.0%
WN1724 HOU → BWI 51 80.0%
WN1794 HOU → BWI 49 87.8%
WN2220 BWI → HOU 49 63.3%
WN3835 BWI → HOU 49 73.5%
WN496 HOU → BWI 49 46.9%
WN1926 BWI → HOU 47 91.5%
WN2093 HOU → BWI 47 97.7%
WN2169 BWI → HOU 46 67.4%
WN978 HOU → BWI 45 95.5%
WN1849 HOU → BWI 44 90.5%
WN1296 BWI → HOU 42 95.1%
WN2461 BWI → HOU 42 78.1%
WN853 BWI → HOU 42 37.5%
WN958 BWI → HOU 42 22.5%
WN1684 BWI → HOU 40 65.0%
WN2198 BWI → HOU 36 72.2%
WN1655 HOU → BWI 35 66.7%
WN4254 BWI → HOU 34 58.8%
WN1526 BWI → HOU 33 46.9%
WN1615 HOU → BWI 33 29.0%
WN1759 BWI → HOU 33 75.8%
WN1860 BWI → HOU 33 93.8%
WN2388 HOU → BWI 33 84.9%
WN3124 HOU → BWI 33 100.0%
WN3129 HOU → BWI 33 36.4%
WN3436 BWI → HOU 33 53.1%
WN3912 BWI → HOU 33 60.6%
WN823 HOU → BWI 33 100.0%
WN956 BWI → HOU 33 75.8%
WN1241 BWI → HOU 32 96.9%
WN3729 HOU → BWI 32 87.5%
WN1895 HOU → BWI 31 71.0%
WN2854 HOU → BWI 31 90.3%
WN2980 HOU → BWI 31 80.7%
WN2252 BWI → HOU 30 62.1%

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 288 +17.6% 5 58.0%
June 2026 229 −5.8% 4 63.3%
May 2026 248 +1.6% 0 69.4%
April 2026 240 +0.8% 0 72.5%
March 2026 238 −1.7% 5 55.5%
February 2026 192 −1.0% 5 74.5%
January 2026 197 +2.6% 8 82.7%
December 2025 258 −1.9% 6 70.5%
November 2025 253 +5.0% 6 72.3%
October 2025 260 +56.6% 0 72.3%
September 2025 249 0 79.9%
August 2025 254 2 72.0%
July 2025 245 11 64.5%
June 2025 243 6 64.6%
May 2025 244 2 73.8%
April 2025 238 2 76.5%
March 2025 242 2 83.1%
February 2025 194 1 82.5%
January 2025 192 19 80.2%
December 2024 263 0 72.6%
November 2024 241 1 87.6%
October 2024 166 0 75.9%

How to read this chart

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