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3,944 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – San Francisco (SFO)

In July 2026, 164 flights operated between Baltimore/Washington International Thurgood Marshall and San Francisco (both directions), and 57.9% 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
January59164▲ 178.0%
February56155▲ 176.8%
March66178▲ 169.7%
April110172▲ 56.4%
May135174▲ 28.9%
June218166▼ 23.9%
July228164▼ 28.1%
August204––
September172––
October211–in progress
November160––
December172––
Year to date (Jan–Jul)8721,173▲ 34.5%

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
January93.2%78.7%▼ 15.6%
February96.4%81.3%▼ 15.7%
March89.4%80.3%▼ 10.2%
April93.6%70.9%▼ 24.3%
May91.1%66.1%▼ 27.4%
June81.2%52.4%▼ 35.5%
July77.2%57.9%▼ 25.0%
August75.5%––
September79.7%––
October85.8%–in progress
November81.9%––
December75.0%––
Year-to-date average (Jan–Jul)88.9%69.7%▼ 21.6%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January39▲ 200.0%
February01–
March02–
April00–
May00–
June20▼ 100.0%
July220.0%
August0––
September0––
October0–in progress
November0––
December1––
Year to date (Jan–Jul)714▲ 100.0%

Airlines on this route

  1. United Airlines 73.7%
  2. Southwest Airlines 26.3%

Oct 1, 2024 – Jul 31, 2026

By direction

BWI → SFO

Scheduled flights
1,605
Flights operated
1,592
Cancelled
13 · 0.8%
On-time departures
76.5%

SFO → BWI

Scheduled flights
1,605
Flights operated
1,596
Cancelled
9 · 0.6%
On-time departures
80.0%

BWI → SFO and SFO → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 2,366 73.7% 86.0% 16
Southwest Airlines WN 844 26.3% 56.7% 6

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 delay06:00–07:00-0.5min · 427 recorded · 424 measured
Gap to highest-delay hour19.5min06:00 ↔ 18:00
Recorded flights3,210BWI–SFO

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 · 92.5% · 427 recorded · 424 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 08:00 · 90.5% · 316 recorded · 314 measured · Source: the US BTS 09:00 · 87.8% · 526 recorded · 523 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 82 recorded · 82 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 30 recorded · 30 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 · 36 recorded · 36 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 46 recorded · 46 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 60 recorded · 60 measured · Source: the US BTS 18:00 · 69.0% · 343 recorded · 339 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 130 recorded · 129 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 81 recorded · 79 measured · Source: the US BTS 21:00 · 67.8% · 615 recorded · 611 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 195 recorded · 193 measured · Source: the US BTS 23:00 · 90.0% · 221 recorded · 220 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 · -0.5 min · 427 recorded · 424 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 08:00 · 3.9 min · 316 recorded · 314 measured · Source: the US BTS 09:00 · 3.6 min · 526 recorded · 523 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 82 recorded · 82 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 30 recorded · 30 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 · 36 recorded · 36 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 46 recorded · 46 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 60 recorded · 60 measured · Source: the US BTS 18:00 · 19.0 min · 343 recorded · 339 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 130 recorded · 129 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 81 recorded · 79 measured · Source: the US BTS 21:00 · 16.5 min · 615 recorded · 611 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 195 recorded · 193 measured · Source: the US BTS 23:00 · 3.4 min · 221 recorded · 220 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 · 427 · 427 recorded · 424 measured · Source: the US BTS 07:00 · 3 · 3 recorded · 3 measured · Source: the US BTS 08:00 · 316 · 316 recorded · 314 measured · Source: the US BTS 09:00 · 526 · 526 recorded · 523 measured · Source: the US BTS 10:00 · 82 · 82 recorded · 82 measured · Source: the US BTS 11:00 · 30 · 30 recorded · 30 measured · Source: the US BTS 12:00 · 57 · 57 recorded · 57 measured · Source: the US BTS 13:00 · 36 · 36 recorded · 36 measured · Source: the US BTS 14:00 · 35 · 35 recorded · 35 measured · Source: the US BTS 15:00 · 46 · 46 recorded · 46 measured · Source: the US BTS 16:00 · 7 · 7 recorded · 7 measured · Source: the US BTS 17:00 · 60 · 60 recorded · 60 measured · Source: the US BTS 18:00 · 343 · 343 recorded · 339 measured · Source: the US BTS 19:00 · 130 · 130 recorded · 129 measured · Source: the US BTS 20:00 · 81 · 81 recorded · 79 measured · Source: the US BTS 21:00 · 615 · 615 recorded · 611 measured · Source: the US BTS 22:00 · 195 · 195 recorded · 193 measured · Source: the US BTS 23:00 · 221 · 221 recorded · 220 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———
05:00No observations———
06:0092.5%-0.5 min424427
07:00Fewer than 200 measured departures—33
08:0090.5%3.9 min314316
09:0087.8%3.6 min523526
10:00Fewer than 200 measured departures—8282
11:00Fewer than 200 measured departures—3030
12:00Fewer than 200 measured departures—5757
13:00Fewer than 200 measured departures—3636
14:00Fewer than 200 measured departures—3535
15:00Fewer than 200 measured departures—4646
16:00Fewer than 200 measured departures—77
17:00Fewer than 200 measured departures—6060
18:0069.0%19.0 min339343
19:00Fewer than 200 measured departures—129130
20:00Fewer than 200 measured departures—7981
21:0067.8%16.5 min611615
22:00Fewer than 200 measured departures—193195
23:0090.0%3.4 min220221

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 78.6% · 489 recorded · 487 measured · Source: the US BTS Tuesday · 80.2% · 379 recorded · 374 measured · Source: the US BTS Wednesday · 78.7% · 431 recorded · 431 measured · Source: the US BTS Thursday · 76.7% · 494 recorded · 494 measured · Source: the US BTS Friday · 77.3% · 487 recorded · 484 measured · Source: the US BTS Saturday · 83.3% · 441 recorded · 438 measured · Source: the US BTS Sunday · 74.0% · 489 recorded · 480 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 · 11.4 min · 489 recorded · 487 measured · Source: the US BTS Tuesday · 8.0 min · 379 recorded · 374 measured · Source: the US BTS Wednesday · 10.9 min · 431 recorded · 431 measured · Source: the US BTS Thursday · 11.3 min · 494 recorded · 494 measured · Source: the US BTS Friday · 13.6 min · 487 recorded · 484 measured · Source: the US BTS Saturday · 6.6 min · 441 recorded · 438 measured · Source: the US BTS Sunday · 12.3 min · 489 recorded · 480 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 · 489 · 489 recorded · 487 measured · Source: the US BTS Tuesday · 379 · 379 recorded · 374 measured · Source: the US BTS Wednesday · 431 · 431 recorded · 431 measured · Source: the US BTS Thursday · 494 · 494 recorded · 494 measured · Source: the US BTS Friday · 487 · 487 recorded · 484 measured · Source: the US BTS Saturday · 441 · 441 recorded · 438 measured · Source: the US BTS Sunday · 489 · 489 recorded · 480 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday78.6%11.4 min487489
Tuesday80.2%8.0 min374379
Wednesday78.7%10.9 min431431
Thursday76.7%11.3 min494494
Friday77.3%13.6 min484487
Saturday83.3%6.6 min438441
Sunday74.0%12.3 min480489

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 · 82.5% · 235 recorded · 223 measured · Source: the US BTS Feb · 85.3% · 212 recorded · 211 measured · Source: the US BTS Mar · 82.8% · 246 recorded · 244 measured · Source: the US BTS Apr · 79.8% · 282 recorded · 282 measured · Source: the US BTS May · 77.0% · 309 recorded · 309 measured · Source: the US BTS Jun · 68.8% · 386 recorded · 384 measured · Source: the US BTS Jul · 69.1% · 396 recorded · 392 measured · Source: the US BTS Aug · 75.5% · 204 recorded · 204 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 172 recorded · 172 measured · Source: the US BTS Oct · 86.8% · 273 recorded · 273 measured · Source: the US BTS Nov · 84.8% · 256 recorded · 256 measured · Source: the US BTS Dec · 78.2% · 239 recorded · 238 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 · 7.8 min · 235 recorded · 223 measured · Source: the US BTS Feb · 4.3 min · 212 recorded · 211 measured · Source: the US BTS Mar · 10.5 min · 246 recorded · 244 measured · Source: the US BTS Apr · 8.2 min · 282 recorded · 282 measured · Source: the US BTS May · 13.0 min · 309 recorded · 309 measured · Source: the US BTS Jun · 16.1 min · 386 recorded · 384 measured · Source: the US BTS Jul · 17.5 min · 396 recorded · 392 measured · Source: the US BTS Aug · 13.9 min · 204 recorded · 204 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 172 recorded · 172 measured · Source: the US BTS Oct · 5.1 min · 273 recorded · 273 measured · Source: the US BTS Nov · 5.9 min · 256 recorded · 256 measured · Source: the US BTS Dec · 10.9 min · 239 recorded · 238 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 · 235 · 235 recorded · 223 measured · Source: the US BTS Feb · 212 · 212 recorded · 211 measured · Source: the US BTS Mar · 246 · 246 recorded · 244 measured · Source: the US BTS Apr · 282 · 282 recorded · 282 measured · Source: the US BTS May · 309 · 309 recorded · 309 measured · Source: the US BTS Jun · 386 · 386 recorded · 384 measured · Source: the US BTS Jul · 396 · 396 recorded · 392 measured · Source: the US BTS Aug · 204 · 204 recorded · 204 measured · Source: the US BTS Sep · 172 · 172 recorded · 172 measured · Source: the US BTS Oct · 273 · 273 recorded · 273 measured · Source: the US BTS Nov · 256 · 256 recorded · 256 measured · Source: the US BTS Dec · 239 · 239 recorded · 238 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan82.5%7.8 min223235
Feb85.3%4.3 min211212
Mar82.8%10.5 min244246
Apr79.8%8.2 min282282
May77.0%13.0 min309309
Jun68.8%16.1 min384386
Jul69.1%17.5 min392396
Aug75.5%13.9 min204204
SepFewer than 200 measured departures—172172
Oct86.8%5.1 min273273
Nov84.8%5.9 min256256
Dec78.2%10.9 min238239

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 77.7% 2,495
  • Delayed >15 min 21.6% 693
  • Cancelled 0.7% 22
  • 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

34
34 of 34
Flight numbersBy direction DeparturesOn time
UA2664 SFO → BWI 522 87.3%
UA2423 SFO → BWI 222 88.2%
UA504 BWI → SFO 167 59.2%
UA2192 BWI → SFO 125 95.2%
UA1259 BWI → SFO 110 89.0%
UA1035 BWI → SFO 101 86.1%
UA1642 BWI → SFO 89 70.5%
UA419 BWI → SFO 82 97.5%
UA1340 SFO → BWI 77 77.6%
UA1939 BWI → SFO 67 89.6%
WN4301 SFO → BWI 64 62.5%
WN4476 SFO → BWI 61 65.6%
WN3036 BWI → SFO 60 61.7%
WN138 BWI → SFO 58 66.7%
WN2683 SFO → BWI 58 29.3%
WN3497 SFO → BWI 58 81.8%
WN3633 BWI → SFO 58 65.5%
WN4209 SFO → BWI 58 44.8%
WN4271 SFO → BWI 58 69.0%
WN3693 BWI → SFO 57 38.6%
UA1288 SFO → BWI 54 92.5%
UA1596 BWI → SFO 53 92.3%
UA2421 BWI → SFO 53 84.9%
UA538 BWI → SFO 52 88.5%
WN1101 BWI → SFO 49 18.4%
UA2409 SFO → BWI 48 93.8%
UA216 BWI → SFO 37 88.6%
UA1074 SFO → BWI 35 85.7%
WN1293 BWI → SFO 33 48.4%
UA1496 BWI → SFO 32 96.9%
WN4427 SFO → BWI 32 71.9%
UA2615 SFO → BWI 31 93.3%
UA363 BWI → SFO 31 96.8%
WN4451 SFO → BWI 31 67.7%

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 164 −28.1% 2 57.9%
June 2026 166 −23.9% 0 52.4%
May 2026 174 +28.9% 0 66.1%
April 2026 172 +56.4% 0 70.9%
March 2026 178 +169.7% 2 80.3%
February 2026 155 +176.8% 1 81.3%
January 2026 164 +178.0% 9 78.7%
December 2025 172 +160.6% 1 75.0%
November 2025 160 +66.7% 0 81.9%
October 2025 211 +240.3% 0 85.8%
September 2025 172 0 79.7%
August 2025 204 0 75.5%
July 2025 228 2 77.2%
June 2025 218 2 81.2%
May 2025 135 0 91.1%
April 2025 110 0 93.6%
March 2025 66 0 89.4%
February 2025 56 0 96.4%
January 2025 59 3 93.2%
December 2024 66 0 86.4%
November 2024 96 0 89.6%
October 2024 62 0 90.3%

How to read this chart

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