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3,686 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – San Diego (SAN)

In July 2026, 207 flights operated between Baltimore/Washington International Thurgood Marshall and San Diego (both directions), and 57.5% 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
January112174▲ 55.4%
February107157▲ 46.7%
March168204▲ 21.4%
April158206▲ 30.4%
May160211▲ 31.9%
June167204▲ 22.2%
July171207▲ 21.1%
August168––
September163––
October202–in progress
November192––
December198––
Year to date (Jan–Jul)1,0431,363▲ 30.7%

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
January79.5%81.6%▲ 2.6%
February78.5%69.4%▼ 11.6%
March81.5%73.0%▼ 10.4%
April80.4%69.4%▼ 13.7%
May81.3%72.0%▼ 11.4%
June73.1%52.0%▼ 28.9%
July67.3%57.5%▼ 14.6%
August79.2%––
September82.8%––
October72.3%–in progress
November81.8%––
December68.7%––
Year-to-date average (Jan–Jul)77.4%67.8%▼ 12.3%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January67▲ 16.7%
February13▲ 200.0%
March06–
April00–
May01–
June02–
July550.0%
August0––
September1––
October0–in progress
November2––
December6––
Year to date (Jan–Jul)1224▲ 100.0%

By direction

BWI → SAN

Scheduled flights
1,834
Flights operated
1,811
Cancelled
23 · 1.3%
On-time departures
71.3%

SAN → BWI

Scheduled flights
1,854
Flights operated
1,830
Cancelled
24 · 1.3%
On-time departures
75.7%

BWI → SAN and SAN → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 3,688 100.0% 73.5% 47

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 delay06:00–07:003.1min · 705 recorded · 696 measured
Gap to highest-delay hour17.9min06:00 ↔ 20:00
Recorded flights3,688BWI–SAN

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 · 93.0% · 705 recorded · 696 measured · Source: the US BTS 07:00 · 91.4% · 279 recorded · 278 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 174 recorded · 173 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 181 recorded · 179 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 59 recorded · 57 measured · Source: the US BTS 11:00 · 70.0% · 225 recorded · 220 measured · Source: the US BTS 12:00 · 65.6% · 209 recorded · 209 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 175 recorded · 173 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 203 recorded · 199 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 147 recorded · 145 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 189 recorded · 186 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 28 recorded · 27 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 119 recorded · 117 measured · Source: the US BTS 19:00 · 67.7% · 205 recorded · 204 measured · Source: the US BTS 20:00 · 61.5% · 279 recorded · 273 measured · Source: the US BTS 21:00 · 74.1% · 511 recorded · 505 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 · 3.1 min · 705 recorded · 696 measured · Source: the US BTS 07:00 · 3.5 min · 279 recorded · 278 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 174 recorded · 173 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 181 recorded · 179 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 59 recorded · 57 measured · Source: the US BTS 11:00 · 15.1 min · 225 recorded · 220 measured · Source: the US BTS 12:00 · 19.4 min · 209 recorded · 209 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 175 recorded · 173 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 203 recorded · 199 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 147 recorded · 145 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 189 recorded · 186 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 28 recorded · 27 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 119 recorded · 117 measured · Source: the US BTS 19:00 · 17.5 min · 205 recorded · 204 measured · Source: the US BTS 20:00 · 21.1 min · 279 recorded · 273 measured · Source: the US BTS 21:00 · 12.3 min · 511 recorded · 505 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.

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 · 705 · 705 recorded · 696 measured · Source: the US BTS 07:00 · 279 · 279 recorded · 278 measured · Source: the US BTS 08:00 · 174 · 174 recorded · 173 measured · Source: the US BTS 09:00 · 181 · 181 recorded · 179 measured · Source: the US BTS 10:00 · 59 · 59 recorded · 57 measured · Source: the US BTS 11:00 · 225 · 225 recorded · 220 measured · Source: the US BTS 12:00 · 209 · 209 recorded · 209 measured · Source: the US BTS 13:00 · 175 · 175 recorded · 173 measured · Source: the US BTS 14:00 · 203 · 203 recorded · 199 measured · Source: the US BTS 15:00 · 147 · 147 recorded · 145 measured · Source: the US BTS 16:00 · 189 · 189 recorded · 186 measured · Source: the US BTS 17:00 · 28 · 28 recorded · 27 measured · Source: the US BTS 18:00 · 119 · 119 recorded · 117 measured · Source: the US BTS 19:00 · 205 · 205 recorded · 204 measured · Source: the US BTS 20:00 · 279 · 279 recorded · 273 measured · Source: the US BTS 21:00 · 511 · 511 recorded · 505 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.

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———
06:0093.0%3.1 min696705
07:0091.4%3.5 min278279
08:00Fewer than 200 measured departures—173174
09:00Fewer than 200 measured departures—179181
10:00Fewer than 200 measured departures—5759
11:0070.0%15.1 min220225
12:0065.6%19.4 min209209
13:00Fewer than 200 measured departures—173175
14:00Fewer than 200 measured departures—199203
15:00Fewer than 200 measured departures—145147
16:00Fewer than 200 measured departures—186189
17:00Fewer than 200 measured departures—2728
18:00Fewer than 200 measured departures—117119
19:0067.7%17.5 min204205
20:0061.5%21.1 min273279
21:0074.1%12.3 min505511
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 · 70.8% · 584 recorded · 571 measured · Source: the US BTS Tuesday · 79.3% · 519 recorded · 511 measured · Source: the US BTS Wednesday · 76.2% · 514 recorded · 509 measured · Source: the US BTS Thursday · 70.3% · 575 recorded · 573 measured · Source: the US BTS Friday · 76.0% · 588 recorded · 583 measured · Source: the US BTS Saturday · 74.6% · 408 recorded · 405 measured · Source: the US BTS Sunday · 67.9% · 500 recorded · 489 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 · 15.7 min · 584 recorded · 571 measured · Source: the US BTS Tuesday · 9.0 min · 519 recorded · 511 measured · Source: the US BTS Wednesday · 12.0 min · 514 recorded · 509 measured · Source: the US BTS Thursday · 15.6 min · 575 recorded · 573 measured · Source: the US BTS Friday · 13.7 min · 588 recorded · 583 measured · Source: the US BTS Saturday · 12.3 min · 408 recorded · 405 measured · Source: the US BTS Sunday · 16.7 min · 500 recorded · 489 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 · 584 · 584 recorded · 571 measured · Source: the US BTS Tuesday · 519 · 519 recorded · 511 measured · Source: the US BTS Wednesday · 514 · 514 recorded · 509 measured · Source: the US BTS Thursday · 575 · 575 recorded · 573 measured · Source: the US BTS Friday · 588 · 588 recorded · 583 measured · Source: the US BTS Saturday · 408 · 408 recorded · 405 measured · Source: the US BTS Sunday · 500 · 500 recorded · 489 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday70.8%15.7 min571584
Tuesday79.3%9.0 min511519
Wednesday76.2%12.0 min509514
Thursday70.3%15.6 min573575
Friday76.0%13.7 min583588
Saturday74.6%12.3 min405408
Sunday67.9%16.7 min489500

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 · 80.8% · 299 recorded · 286 measured · Source: the US BTS Feb · 73.1% · 268 recorded · 264 measured · Source: the US BTS Mar · 76.9% · 378 recorded · 372 measured · Source: the US BTS Apr · 74.2% · 364 recorded · 364 measured · Source: the US BTS May · 76.0% · 372 recorded · 371 measured · Source: the US BTS Jun · 61.5% · 373 recorded · 371 measured · Source: the US BTS Jul · 61.9% · 388 recorded · 378 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 168 recorded · 168 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 164 recorded · 163 measured · Source: the US BTS Oct · 73.8% · 282 recorded · 282 measured · Source: the US BTS Nov · 83.2% · 306 recorded · 304 measured · Source: the US BTS Dec · 70.4% · 326 recorded · 318 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 · 10.7 min · 299 recorded · 286 measured · Source: the US BTS Feb · 11.6 min · 268 recorded · 264 measured · Source: the US BTS Mar · 12.7 min · 378 recorded · 372 measured · Source: the US BTS Apr · 12.2 min · 364 recorded · 364 measured · Source: the US BTS May · 14.2 min · 372 recorded · 371 measured · Source: the US BTS Jun · 21.9 min · 373 recorded · 371 measured · Source: the US BTS Jul · 19.7 min · 388 recorded · 378 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 168 recorded · 168 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 164 recorded · 163 measured · Source: the US BTS Oct · 10.6 min · 282 recorded · 282 measured · Source: the US BTS Nov · 7.9 min · 306 recorded · 304 measured · Source: the US BTS Dec · 16.2 min · 326 recorded · 318 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 · 299 · 299 recorded · 286 measured · Source: the US BTS Feb · 268 · 268 recorded · 264 measured · Source: the US BTS Mar · 378 · 378 recorded · 372 measured · Source: the US BTS Apr · 364 · 364 recorded · 364 measured · Source: the US BTS May · 372 · 372 recorded · 371 measured · Source: the US BTS Jun · 373 · 373 recorded · 371 measured · Source: the US BTS Jul · 388 · 388 recorded · 378 measured · Source: the US BTS Aug · 168 · 168 recorded · 168 measured · Source: the US BTS Sep · 164 · 164 recorded · 163 measured · Source: the US BTS Oct · 282 · 282 recorded · 282 measured · Source: the US BTS Nov · 306 · 306 recorded · 304 measured · Source: the US BTS Dec · 326 · 326 recorded · 318 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan80.8%10.7 min286299
Feb73.1%11.6 min264268
Mar76.9%12.7 min372378
Apr74.2%12.2 min364364
May76.0%14.2 min371372
Jun61.5%21.9 min371373
Jul61.9%19.7 min378388
AugFewer than 200 measured departures—168168
SepFewer than 200 measured departures—163164
Oct73.8%10.6 min282282
Nov83.2%7.9 min304306
Dec70.4%16.2 min318326

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 72.6% 2,677
  • Delayed >15 min 26.1% 964
  • Cancelled 1.3% 47
  • 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

50
50 of 50
Flight numbersBy direction DeparturesOn time
WN4316 BWI → SAN 81 61.3%
WN4403 SAN → BWI 65 77.4%
WN4212 SAN → BWI 64 82.3%
WN496 BWI → SAN 63 62.9%
WN2042 BWI → SAN 61 55.0%
WN4378 SAN → BWI 61 73.8%
WN4910 BWI → SAN 61 89.8%
WN1301 BWI → SAN 58 79.3%
WN1306 BWI → SAN 58 67.2%
WN1320 SAN → BWI 58 87.7%
WN1900 BWI → SAN 58 66.7%
WN2114 SAN → BWI 58 37.9%
WN2138 BWI → SAN 58 78.6%
WN2356 SAN → BWI 58 93.1%
WN3380 SAN → BWI 58 92.9%
WN3486 SAN → BWI 58 51.7%
WN4058 SAN → BWI 58 84.5%
WN4182 SAN → BWI 58 93.0%
WN4481 SAN → BWI 58 96.6%
WN1089 BWI → SAN 57 32.7%
WN3896 SAN → BWI 57 87.7%
WN3382 SAN → BWI 55 74.1%
WN4458 BWI → SAN 55 94.3%
WN4171 SAN → BWI 53 61.5%
WN4487 BWI → SAN 53 72.6%
WN1766 SAN → BWI 50 93.9%
WN1806 SAN → BWI 45 86.4%
WN1053 SAN → BWI 42 80.5%
WN1088 BWI → SAN 42 32.5%
WN1304 BWI → SAN 42 52.4%
WN1919 BWI → SAN 42 81.0%
WN1926 SAN → BWI 42 95.2%
WN2993 BWI → SAN 41 75.6%
WN1001 SAN → BWI 36 91.7%
WN1328 BWI → SAN 34 61.8%
WN3341 BWI → SAN 34 76.5%
WN1090 BWI → SAN 33 97.0%
WN2308 BWI → SAN 33 59.4%
WN277 SAN → BWI 33 53.1%
WN3401 BWI → SAN 33 87.5%
WN3517 SAN → BWI 33 90.6%
WN4148 SAN → BWI 33 21.2%
WN4185 BWI → SAN 33 84.9%
WN574 SAN → BWI 33 48.5%
WN1915 BWI → SAN 32 78.1%
WN3245 SAN → BWI 32 68.8%
WN4489 SAN → BWI 32 87.5%
WN429 SAN → BWI 31 80.7%
WN4378 BWI → SAN 31 48.4%
WN1931 BWI → SAN 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 207 +21.1% 5 57.5%
June 2026 204 +22.2% 2 52.0%
May 2026 211 +31.9% 1 72.0%
April 2026 206 +30.4% 0 69.4%
March 2026 204 +21.4% 6 73.0%
February 2026 157 +46.7% 3 69.4%
January 2026 174 +55.4% 7 81.6%
December 2025 198 +65.0% 6 68.7%
November 2025 192 +71.4% 2 81.8%
October 2025 202 +152.5% 0 72.3%
September 2025 163 1 82.8%
August 2025 168 0 79.2%
July 2025 171 5 67.3%
June 2025 167 0 73.1%
May 2025 160 0 81.3%
April 2025 158 0 80.4%
March 2025 168 0 81.5%
February 2025 107 1 78.5%
January 2025 112 6 79.5%
December 2024 120 2 73.3%
November 2024 112 0 85.7%
October 2024 80 0 77.5%

How to read this chart

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