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1,986 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – George Bush Intercontinental (IAH)

In July 2026, 205 flights operated between Baltimore/Washington International Thurgood Marshall and George Bush Intercontinental (both directions), and 74.1% 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
January209222▲ 6.2%
February157200▲ 27.4%
March132222▲ 68.2%
April180237▲ 31.7%
May204212▲ 3.9%
June188201▲ 6.9%
July208205▼ 1.4%
August199––
September212––
October215–in progress
November243––
December208––
Year to date (Jan–Jul)1,2781,499▲ 17.3%

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
January76.6%84.2%▲ 9.9%
February86.0%87.0%▲ 1.2%
March89.4%76.1%▼ 14.9%
April86.1%83.1%▼ 3.5%
May81.9%75.5%▼ 7.8%
June68.1%76.1%▲ 11.7%
July72.1%74.1%▲ 2.8%
August78.9%––
September84.4%––
October81.9%–in progress
November79.8%––
December71.6%––
Year-to-date average (Jan–Jul)80.0%79.4%▼ 0.7%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January1316▲ 23.1%
February15▲ 400.0%
March08–
April03–
May20▼ 100.0%
June24▲ 100.0%
July46▲ 50.0%
August0––
September0––
October0–in progress
November2––
December1––
Year to date (Jan–Jul)2242▲ 90.9%

Airlines on this route

  1. United Airlines 61.1%
  2. Spirit Airlines 32.3%
  3. Frontier Airlines 6.6%
  4. SkyWest Airlines 0.1%

Oct 1, 2024 – Jul 31, 2026

By direction

BWI → IAH

Scheduled flights
2,252
Flights operated
2,213
Cancelled
39 · 1.7%
On-time departures
82.3%

IAH → BWI

Scheduled flights
2,250
Flights operated
2,222
Cancelled
28 · 1.2%
On-time departures
77.6%

BWI → IAH and IAH → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 2,749 61.1% 83.0% 24
Spirit Airlines NK 1,452 32.3% 77.6% 26
Frontier Airlines F9 298 6.6% 62.3% 17
SkyWest Airlines OO 3 0.1% 100.0% 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 delay06:00–07:003.3min · 813 recorded · 804 measured
Gap to highest-delay hour18.8min06:00 ↔ 18:00
Recorded flights4,502BWI–IAH

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 · 81.4% · 228 recorded · 220 measured · Source: the US BTS 06:00 · 91.2% · 813 recorded · 804 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 185 recorded · 184 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 179 recorded · 176 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 39 recorded · 39 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 68 recorded · 67 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 192 recorded · 192 measured · Source: the US BTS 12:00 · 84.4% · 785 recorded · 781 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 65 recorded · 64 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 197 recorded · 195 measured · Source: the US BTS 15:00 · 80.4% · 212 recorded · 209 measured · Source: the US BTS 16:00 · 72.9% · 292 recorded · 280 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 166 recorded · 163 measured · Source: the US BTS 18:00 · 68.1% · 765 recorded · 759 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 171 recorded · 165 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 109 recorded · 105 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 34 recorded · 30 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 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
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 · 13.8 min · 228 recorded · 220 measured · Source: the US BTS 06:00 · 3.3 min · 813 recorded · 804 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 185 recorded · 184 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 179 recorded · 176 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 39 recorded · 39 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 68 recorded · 67 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 192 recorded · 192 measured · Source: the US BTS 12:00 · 9.1 min · 785 recorded · 781 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 65 recorded · 64 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 197 recorded · 195 measured · Source: the US BTS 15:00 · 11.3 min · 212 recorded · 209 measured · Source: the US BTS 16:00 · 19.3 min · 292 recorded · 280 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 166 recorded · 163 measured · Source: the US BTS 18:00 · 22.1 min · 765 recorded · 759 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 171 recorded · 165 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 109 recorded · 105 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 34 recorded · 30 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 2 recorded · 2 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 · 228 · 228 recorded · 220 measured · Source: the US BTS 06:00 · 813 · 813 recorded · 804 measured · Source: the US BTS 07:00 · 185 · 185 recorded · 184 measured · Source: the US BTS 08:00 · 179 · 179 recorded · 176 measured · Source: the US BTS 09:00 · 39 · 39 recorded · 39 measured · Source: the US BTS 10:00 · 68 · 68 recorded · 67 measured · Source: the US BTS 11:00 · 192 · 192 recorded · 192 measured · Source: the US BTS 12:00 · 785 · 785 recorded · 781 measured · Source: the US BTS 13:00 · 65 · 65 recorded · 64 measured · Source: the US BTS 14:00 · 197 · 197 recorded · 195 measured · Source: the US BTS 15:00 · 212 · 212 recorded · 209 measured · Source: the US BTS 16:00 · 292 · 292 recorded · 280 measured · Source: the US BTS 17:00 · 166 · 166 recorded · 163 measured · Source: the US BTS 18:00 · 765 · 765 recorded · 759 measured · Source: the US BTS 19:00 · 171 · 171 recorded · 165 measured · Source: the US BTS 20:00 · 109 · 109 recorded · 105 measured · Source: the US BTS 21:00 · 34 · 34 recorded · 30 measured · Source: the US BTS 22:00 · 2 · 2 recorded · 2 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———
05:0081.4%13.8 min220228
06:0091.2%3.3 min804813
07:00Fewer than 200 measured departures—184185
08:00Fewer than 200 measured departures—176179
09:00Fewer than 200 measured departures—3939
10:00Fewer than 200 measured departures—6768
11:00Fewer than 200 measured departures—192192
12:0084.4%9.1 min781785
13:00Fewer than 200 measured departures—6465
14:00Fewer than 200 measured departures—195197
15:0080.4%11.3 min209212
16:0072.9%19.3 min280292
17:00Fewer than 200 measured departures—163166
18:0068.1%22.1 min759765
19:00Fewer than 200 measured departures—165171
20:00Fewer than 200 measured departures—105109
21:00Fewer than 200 measured departures—3034
22:00Fewer than 200 measured departures—22
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 77.2% · 682 recorded · 666 measured · Source: the US BTS Tuesday · 82.4% · 590 recorded · 581 measured · Source: the US BTS Wednesday · 83.3% · 604 recorded · 600 measured · Source: the US BTS Thursday · 82.6% · 710 recorded · 707 measured · Source: the US BTS Friday · 80.1% · 707 recorded · 694 measured · Source: the US BTS Saturday · 79.2% · 538 recorded · 534 measured · Source: the US BTS Sunday · 75.2% · 671 recorded · 653 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 · 16.6 min · 682 recorded · 666 measured · Source: the US BTS Tuesday · 9.2 min · 590 recorded · 581 measured · Source: the US BTS Wednesday · 11.5 min · 604 recorded · 600 measured · Source: the US BTS Thursday · 9.2 min · 710 recorded · 707 measured · Source: the US BTS Friday · 13.6 min · 707 recorded · 694 measured · Source: the US BTS Saturday · 15.3 min · 538 recorded · 534 measured · Source: the US BTS Sunday · 18.3 min · 671 recorded · 653 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 · 682 · 682 recorded · 666 measured · Source: the US BTS Tuesday · 590 · 590 recorded · 581 measured · Source: the US BTS Wednesday · 604 · 604 recorded · 600 measured · Source: the US BTS Thursday · 710 · 710 recorded · 707 measured · Source: the US BTS Friday · 707 · 707 recorded · 694 measured · Source: the US BTS Saturday · 538 · 538 recorded · 534 measured · Source: the US BTS Sunday · 671 · 671 recorded · 653 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday77.2%16.6 min666682
Tuesday82.4%9.2 min581590
Wednesday83.3%11.5 min600604
Thursday82.6%9.2 min707710
Friday80.1%13.6 min694707
Saturday79.2%15.3 min534538
Sunday75.2%18.3 min653671

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 · 80.5% · 460 recorded · 431 measured · Source: the US BTS Feb · 86.6% · 363 recorded · 357 measured · Source: the US BTS Mar · 81.1% · 362 recorded · 354 measured · Source: the US BTS Apr · 84.4% · 420 recorded · 417 measured · Source: the US BTS May · 78.6% · 418 recorded · 416 measured · Source: the US BTS Jun · 72.2% · 395 recorded · 389 measured · Source: the US BTS Jul · 73.1% · 423 recorded · 413 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 199 recorded · 199 measured · Source: the US BTS Sep · 84.4% · 212 recorded · 212 measured · Source: the US BTS Oct · 84.8% · 355 recorded · 355 measured · Source: the US BTS Nov · 83.2% · 461 recorded · 459 measured · Source: the US BTS Dec · 74.6% · 434 recorded · 433 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 · 10.8 min · 460 recorded · 431 measured · Source: the US BTS Feb · 6.6 min · 363 recorded · 357 measured · Source: the US BTS Mar · 13.6 min · 362 recorded · 354 measured · Source: the US BTS Apr · 9.4 min · 420 recorded · 417 measured · Source: the US BTS May · 14.1 min · 418 recorded · 416 measured · Source: the US BTS Jun · 15.1 min · 395 recorded · 389 measured · Source: the US BTS Jul · 28.0 min · 423 recorded · 413 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 199 recorded · 199 measured · Source: the US BTS Sep · 8.6 min · 212 recorded · 212 measured · Source: the US BTS Oct · 5.7 min · 355 recorded · 355 measured · Source: the US BTS Nov · 10.1 min · 461 recorded · 459 measured · Source: the US BTS Dec · 18.5 min · 434 recorded · 433 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 · 460 · 460 recorded · 431 measured · Source: the US BTS Feb · 363 · 363 recorded · 357 measured · Source: the US BTS Mar · 362 · 362 recorded · 354 measured · Source: the US BTS Apr · 420 · 420 recorded · 417 measured · Source: the US BTS May · 418 · 418 recorded · 416 measured · Source: the US BTS Jun · 395 · 395 recorded · 389 measured · Source: the US BTS Jul · 423 · 423 recorded · 413 measured · Source: the US BTS Aug · 199 · 199 recorded · 199 measured · Source: the US BTS Sep · 212 · 212 recorded · 212 measured · Source: the US BTS Oct · 355 · 355 recorded · 355 measured · Source: the US BTS Nov · 461 · 461 recorded · 459 measured · Source: the US BTS Dec · 434 · 434 recorded · 433 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan80.5%10.8 min431460
Feb86.6%6.6 min357363
Mar81.1%13.6 min354362
Apr84.4%9.4 min417420
May78.6%14.1 min416418
Jun72.2%15.1 min389395
Jul73.1%28.0 min413423
AugFewer than 200 measured departures—199199
Sep84.4%8.6 min212212
Oct84.8%5.7 min355355
Nov83.2%10.1 min459461
Dec74.6%18.5 min433434

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 78.8% 3,547
  • Delayed >15 min 19.7% 888
  • Cancelled 1.5% 67
  • 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

51
51 of 51
Flight numbersBy direction DeparturesOn time
UA2128 BWI → IAH 379 93.9%
UA2322 IAH → BWI 320 67.7%
UA274 IAH → BWI 265 79.2%
UA2384 BWI → IAH 234 83.6%
UA1898 BWI → IAH 206 95.0%
UA1720 IAH → BWI 163 84.7%
F993067 BWI → IAH 149 60.7%
F993068 IAH → BWI 149 63.8%
UA2095 BWI → IAH 118 74.6%
UA604 IAH → BWI 115 94.8%
UA2682 IAH → BWI 114 68.8%
UA451 BWI → IAH 112 84.7%
NK1245 IAH → BWI 96 85.0%
NK1244 BWI → IAH 93 55.2%
NK225 BWI → IAH 83 71.1%
NK3128 IAH → BWI 73 69.4%
NK3125 BWI → IAH 69 86.8%
NK2603 BWI → IAH 56 87.5%
NK2608 IAH → BWI 55 52.7%
UA743 BWI → IAH 52 88.2%
NK3222 IAH → BWI 51 86.0%
UA2194 BWI → IAH 51 92.2%
NK1317 IAH → BWI 49 85.7%
NK1318 BWI → IAH 49 81.6%
NK2569 IAH → BWI 45 86.7%
NK2570 BWI → IAH 45 84.1%
UA1115 IAH → BWI 37 91.7%
UA2190 BWI → IAH 37 80.6%
UA351 IAH → BWI 37 91.9%
UA1108 IAH → BWI 36 94.3%
NK2175 BWI → IAH 35 68.6%
NK822 IAH → BWI 35 94.3%
NK823 BWI → IAH 35 91.4%
UA1956 IAH → BWI 35 71.4%
UA543 BWI → IAH 35 64.7%
UA600 BWI → IAH 35 80.0%
NK140 IAH → BWI 34 74.2%
NK1633 IAH → BWI 34 69.7%
NK1634 BWI → IAH 34 87.1%
NK2174 IAH → BWI 34 70.6%
NK139 BWI → IAH 33 41.9%
NK1312 IAH → BWI 32 84.4%
NK1313 BWI → IAH 32 84.4%
NK2952 BWI → IAH 32 81.3%
NK710 IAH → BWI 32 78.1%
UA204 BWI → IAH 32 96.9%
NK2399 IAH → BWI 31 74.2%
NK2400 BWI → IAH 31 64.5%
UA1533 IAH → BWI 31 87.1%
NK2953 IAH → BWI 30 80.0%
NK713 BWI → IAH 30 80.0%

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 205 −1.4% 6 74.1%
June 2026 201 +6.9% 4 76.1%
May 2026 212 +3.9% 0 75.5%
April 2026 237 +31.7% 3 83.1%
March 2026 222 +68.2% 8 76.1%
February 2026 200 +27.4% 5 87.0%
January 2026 222 +6.2% 16 84.2%
December 2025 208 −7.6% 1 71.6%
November 2025 243 +12.5% 2 79.8%
October 2025 215 +53.6% 0 81.9%
September 2025 212 0 84.4%
August 2025 199 0 78.9%
July 2025 208 4 72.1%
June 2025 188 2 68.1%
May 2025 204 2 81.9%
April 2025 180 0 86.1%
March 2025 132 0 89.4%
February 2025 157 1 86.0%
January 2025 209 13 76.6%
December 2024 225 0 77.3%
November 2024 216 0 87.0%
October 2024 140 0 89.3%

How to read this chart

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