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2,262 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – San Antonio (SAT)

In July 2026, 155 flights operated between Baltimore/Washington International Thurgood Marshall and San Antonio (both directions), and 65.2% 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
January11574▼ 35.7%
February11864▼ 45.8%
March123101▼ 17.9%
April114104▼ 8.8%
May127104▼ 18.1%
June171149▼ 12.9%
July166155▼ 6.6%
August139––
September138––
October149–in progress
November122––
December140––
Year to date (Jan–Jul)934751▼ 19.6%

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%83.8%▲ 4.7%
February79.7%82.8%▲ 3.9%
March80.5%68.3%▼ 15.2%
April78.9%85.6%▲ 8.5%
May73.2%72.1%▼ 1.5%
June64.3%61.7%▼ 4.0%
July69.9%65.2%▼ 6.7%
August82.7%––
September84.1%––
October79.9%–in progress
November82.8%––
December78.6%––
Year-to-date average (Jan–Jul)75.2%74.2%▼ 1.3%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January74▼ 42.9%
February06–
March110.0%
April00–
May00–
June31▼ 66.7%
July47▲ 75.0%
August3––
September0––
October1–in progress
November0––
December2––
Year to date (Jan–Jul)1519▲ 26.7%

Airlines on this route

  1. Southwest Airlines 98.8%
  2. Spirit Airlines 1.2%

Oct 1, 2024 – Jul 31, 2026

By direction

BWI → SAT

Scheduled flights
1,379
Flights operated
1,360
Cancelled
19 · 1.4%
On-time departures
70.3%

SAT → BWI

Scheduled flights
1,383
Flights operated
1,362
Cancelled
21 · 1.5%
On-time departures
82.5%

BWI → SAT and SAT → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 2,728 98.8% 76.5% 39
Spirit Airlines NK 34 1.2% 66.7% 1

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 delay05:00–06:00-0.4min · 549 recorded · 543 measured
Gap to highest-delay hour23.0min05:00 ↔ 15:00
Recorded flights2,762BWI–SAT

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 · 97.4% · 549 recorded · 543 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 86 recorded · 84 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 21 recorded · 21 measured · Source: the US BTS 08:00 · 89.1% · 313 recorded · 311 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 121 recorded · 120 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 146 recorded · 142 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 133 recorded · 131 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 57 recorded · 57 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 84 recorded · 83 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 54 recorded · 54 measured · Source: the US BTS 15:00 · 62.9% · 299 recorded · 294 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 158 recorded · 158 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 191 recorded · 188 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 146 recorded · 144 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 143 recorded · 138 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 188 recorded · 181 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 57 recorded · 57 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 16 recorded · 16 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 · -0.4 min · 549 recorded · 543 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 86 recorded · 84 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 21 recorded · 21 measured · Source: the US BTS 08:00 · 5.7 min · 313 recorded · 311 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 121 recorded · 120 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 146 recorded · 142 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 133 recorded · 131 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 57 recorded · 57 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 84 recorded · 83 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 54 recorded · 54 measured · Source: the US BTS 15:00 · 22.6 min · 299 recorded · 294 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 158 recorded · 158 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 191 recorded · 188 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 146 recorded · 144 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 143 recorded · 138 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 188 recorded · 181 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 57 recorded · 57 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 16 recorded · 16 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 · 549 · 549 recorded · 543 measured · Source: the US BTS 06:00 · 86 · 86 recorded · 84 measured · Source: the US BTS 07:00 · 21 · 21 recorded · 21 measured · Source: the US BTS 08:00 · 313 · 313 recorded · 311 measured · Source: the US BTS 09:00 · 121 · 121 recorded · 120 measured · Source: the US BTS 10:00 · 146 · 146 recorded · 142 measured · Source: the US BTS 11:00 · 133 · 133 recorded · 131 measured · Source: the US BTS 12:00 · 57 · 57 recorded · 57 measured · Source: the US BTS 13:00 · 84 · 84 recorded · 83 measured · Source: the US BTS 14:00 · 54 · 54 recorded · 54 measured · Source: the US BTS 15:00 · 299 · 299 recorded · 294 measured · Source: the US BTS 16:00 · 158 · 158 recorded · 158 measured · Source: the US BTS 17:00 · 191 · 191 recorded · 188 measured · Source: the US BTS 18:00 · 146 · 146 recorded · 144 measured · Source: the US BTS 19:00 · 143 · 143 recorded · 138 measured · Source: the US BTS 20:00 · 188 · 188 recorded · 181 measured · Source: the US BTS 21:00 · 57 · 57 recorded · 57 measured · Source: the US BTS 22:00 · 16 · 16 recorded · 16 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———
05:0097.4%-0.4 min543549
06:00Fewer than 200 measured departures—8486
07:00Fewer than 200 measured departures—2121
08:0089.1%5.7 min311313
09:00Fewer than 200 measured departures—120121
10:00Fewer than 200 measured departures—142146
11:00Fewer than 200 measured departures—131133
12:00Fewer than 200 measured departures—5757
13:00Fewer than 200 measured departures—8384
14:00Fewer than 200 measured departures—5454
15:0062.9%22.6 min294299
16:00Fewer than 200 measured departures—158158
17:00Fewer than 200 measured departures—188191
18:00Fewer than 200 measured departures—144146
19:00Fewer than 200 measured departures—138143
20:00Fewer than 200 measured departures—181188
21:00Fewer than 200 measured departures—5757
22:00Fewer than 200 measured departures—1616
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 76.0% · 458 recorded · 446 measured · Source: the US BTS Tuesday · 81.4% · 398 recorded · 392 measured · Source: the US BTS Wednesday · 82.1% · 394 recorded · 390 measured · Source: the US BTS Thursday · 72.3% · 434 recorded · 429 measured · Source: the US BTS Friday · 76.1% · 461 recorded · 456 measured · Source: the US BTS Saturday · 71.3% · 263 recorded · 261 measured · Source: the US BTS Sunday · 74.4% · 354 recorded · 348 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 · 13.5 min · 458 recorded · 446 measured · Source: the US BTS Tuesday · 11.0 min · 398 recorded · 392 measured · Source: the US BTS Wednesday · 9.1 min · 394 recorded · 390 measured · Source: the US BTS Thursday · 13.9 min · 434 recorded · 429 measured · Source: the US BTS Friday · 15.6 min · 461 recorded · 456 measured · Source: the US BTS Saturday · 16.2 min · 263 recorded · 261 measured · Source: the US BTS Sunday · 14.4 min · 354 recorded · 348 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 · 458 · 458 recorded · 446 measured · Source: the US BTS Tuesday · 398 · 398 recorded · 392 measured · Source: the US BTS Wednesday · 394 · 394 recorded · 390 measured · Source: the US BTS Thursday · 434 · 434 recorded · 429 measured · Source: the US BTS Friday · 461 · 461 recorded · 456 measured · Source: the US BTS Saturday · 263 · 263 recorded · 261 measured · Source: the US BTS Sunday · 354 · 354 recorded · 348 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday76.0%13.5 min446458
Tuesday81.4%11.0 min392398
Wednesday82.1%9.1 min390394
Thursday72.3%13.9 min429434
Friday76.1%15.6 min456461
Saturday71.3%16.2 min261263
Sunday74.4%14.4 min348354

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 · Fewer than 200 measured departures · 200 recorded · 189 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 188 recorded · 182 measured · Source: the US BTS Mar · 75.0% · 226 recorded · 224 measured · Source: the US BTS Apr · 82.1% · 218 recorded · 218 measured · Source: the US BTS May · 72.7% · 231 recorded · 231 measured · Source: the US BTS Jun · 63.1% · 324 recorded · 320 measured · Source: the US BTS Jul · 67.6% · 332 recorded · 321 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 142 recorded · 139 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 138 recorded · 138 measured · Source: the US BTS Oct · 80.3% · 244 recorded · 243 measured · Source: the US BTS Nov · 85.9% · 241 recorded · 241 measured · Source: the US BTS Dec · 76.8% · 278 recorded · 276 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 · Fewer than 200 measured departures · 200 recorded · 189 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 188 recorded · 182 measured · Source: the US BTS Mar · 17.5 min · 226 recorded · 224 measured · Source: the US BTS Apr · 8.8 min · 218 recorded · 218 measured · Source: the US BTS May · 18.7 min · 231 recorded · 231 measured · Source: the US BTS Jun · 24.9 min · 324 recorded · 320 measured · Source: the US BTS Jul · 23.3 min · 332 recorded · 321 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 142 recorded · 139 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 138 recorded · 138 measured · Source: the US BTS Oct · 8.2 min · 244 recorded · 243 measured · Source: the US BTS Nov · 6.5 min · 241 recorded · 241 measured · Source: the US BTS Dec · 10.5 min · 278 recorded · 276 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 · 200 · 200 recorded · 189 measured · Source: the US BTS Feb · 188 · 188 recorded · 182 measured · Source: the US BTS Mar · 226 · 226 recorded · 224 measured · Source: the US BTS Apr · 218 · 218 recorded · 218 measured · Source: the US BTS May · 231 · 231 recorded · 231 measured · Source: the US BTS Jun · 324 · 324 recorded · 320 measured · Source: the US BTS Jul · 332 · 332 recorded · 321 measured · Source: the US BTS Aug · 142 · 142 recorded · 139 measured · Source: the US BTS Sep · 138 · 138 recorded · 138 measured · Source: the US BTS Oct · 244 · 244 recorded · 243 measured · Source: the US BTS Nov · 241 · 241 recorded · 241 measured · Source: the US BTS Dec · 278 · 278 recorded · 276 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—189200
FebFewer than 200 measured departures—182188
Mar75.0%17.5 min224226
Apr82.1%8.8 min218218
May72.7%18.7 min231231
Jun63.1%24.9 min320324
Jul67.6%23.3 min321332
AugFewer than 200 measured departures—139142
SepFewer than 200 measured departures—138138
Oct80.3%8.2 min243244
Nov85.9%6.5 min241241
Dec76.8%10.5 min276278

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 75.3% 2,080
  • Delayed >15 min 23.2% 642
  • Cancelled 1.4% 40
  • 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

42
42 of 42
Flight numbersBy direction DeparturesOn time
WN2922 SAT → BWI 122 94.2%
WN800 BWI → SAT 74 82.2%
WN1945 BWI → SAT 72 65.7%
WN4596 SAT → BWI 65 88.9%
WN1904 BWI → SAT 64 75.0%
WN714 SAT → BWI 64 93.8%
WN1785 BWI → SAT 61 75.0%
WN2831 SAT → BWI 61 72.9%
WN4668 SAT → BWI 61 96.7%
WN461 BWI → SAT 59 77.6%
WN1456 BWI → SAT 58 84.2%
WN1575 SAT → BWI 58 93.1%
WN2570 BWI → SAT 58 65.5%
WN3559 SAT → BWI 58 98.3%
WN380 SAT → BWI 58 86.2%
WN2158 BWI → SAT 57 66.7%
WN3929 BWI → SAT 50 86.0%
WN2557 SAT → BWI 49 79.6%
WN1927 BWI → SAT 44 26.2%
WN1925 BWI → SAT 43 58.1%
WN1030 SAT → BWI 42 71.4%
WN1921 BWI → SAT 42 85.7%
WN3561 SAT → BWI 42 39.0%
WN4231 SAT → BWI 42 88.1%
WN546 BWI → SAT 42 85.7%
WN712 SAT → BWI 42 56.1%
WN1926 SAT → BWI 35 52.9%
WN4366 BWI → SAT 35 54.3%
WN961 BWI → SAT 35 91.4%
WN3293 SAT → BWI 34 87.9%
WN2106 BWI → SAT 33 56.3%
WN2133 BWI → SAT 33 78.8%
WN3837 BWI → SAT 33 78.8%
WN3880 SAT → BWI 33 72.7%
WN4391 SAT → BWI 33 96.9%
WN474 SAT → BWI 33 97.0%
WN536 SAT → BWI 33 96.9%
WN2226 BWI → SAT 32 56.3%
WN2570 SAT → BWI 32 96.9%
WN1437 SAT → BWI 31 96.7%
WN2813 SAT → BWI 31 74.2%
WN948 BWI → SAT 31 87.1%

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 155 −6.6% 7 65.2%
June 2026 149 −12.9% 1 61.7%
May 2026 104 −18.1% 0 72.1%
April 2026 104 −8.8% 0 85.6%
March 2026 101 −17.9% 1 68.3%
February 2026 64 −45.8% 6 82.8%
January 2026 74 −35.7% 4 83.8%
December 2025 140 +2.9% 2 78.6%
November 2025 122 +2.5% 0 82.8%
October 2025 149 +58.5% 1 79.9%
September 2025 138 0 84.1%
August 2025 139 3 82.7%
July 2025 166 4 69.9%
June 2025 171 3 64.3%
May 2025 127 0 73.2%
April 2025 114 0 78.9%
March 2025 123 1 80.5%
February 2025 118 0 79.7%
January 2025 115 7 80.0%
December 2024 136 0 75.0%
November 2024 119 0 89.1%
October 2024 94 0 80.9%

How to read this chart

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