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2,994 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – Salt Lake City (SLC)

In July 2026, 129 flights operated between Baltimore/Washington International Thurgood Marshall and Salt Lake City (both directions), and 79.1% 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
January137133▼ 2.9%
February150149▼ 0.7%
March138136▼ 1.4%
April122120▼ 1.6%
May1241240.0%
June1281280.0%
July130129▼ 0.8%
August126––
September120––
October121–in progress
November111––
December119––
Year to date (Jan–Jul)929919▼ 1.1%

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
January81.0%82.0%▲ 1.2%
February73.3%76.5%▲ 4.4%
March81.9%72.8%▼ 11.1%
April85.2%85.8%▲ 0.7%
May77.4%75.8%▼ 2.1%
June72.7%73.4%▲ 1.0%
July79.2%79.1%▼ 0.1%
August83.3%––
September86.7%––
October86.0%–in progress
November86.5%––
December69.7%––
Year-to-date average (Jan–Jul)78.7%77.9%▼ 1.0%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January28▲ 300.0%
February07–
March00–
April02–
May00–
June00–
July21▼ 50.0%
August0––
September0––
October0–in progress
November2––
December2––
Year to date (Jan–Jul)418▲ 350.0%

Airlines on this route

  1. Southwest Airlines 53.3%
  2. Delta Air Lines 46.7%

Oct 1, 2024 – Jul 31, 2026

By direction

BWI → SLC

Scheduled flights
1,388
Flights operated
1,374
Cancelled
14 · 1.0%
On-time departures
76.9%

SLC → BWI

Scheduled flights
1,388
Flights operated
1,376
Cancelled
12 · 0.9%
On-time departures
82.2%

BWI → SLC and SLC → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 1,480 53.3% 74.7% 14
Delta Air Lines DL 1,296 46.7% 85.1% 12

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 delay23:00–00:000.9min · 642 recorded · 639 measured
Gap to highest-delay hour13.7min23:00 ↔ 13:00
Recorded flights2,776BWI–SLC

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 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 07:00 · 85.6% · 623 recorded · 617 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 83 recorded · 81 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 166 recorded · 165 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 167 recorded · 166 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 64 recorded · 62 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 163 recorded · 163 measured · Source: the US BTS 13:00 · 70.2% · 230 recorded · 228 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 138 recorded · 136 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 167 recorded · 164 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 66 recorded · 65 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 43 recorded · 42 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 12 recorded · 11 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · 88.3% · 642 recorded · 639 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 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 105 recorded · 104 measured · Source: the US BTS 07:00 · 7.9 min · 623 recorded · 617 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 83 recorded · 81 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 166 recorded · 165 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 167 recorded · 166 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 64 recorded · 62 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 163 recorded · 163 measured · Source: the US BTS 13:00 · 14.6 min · 230 recorded · 228 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 138 recorded · 136 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 167 recorded · 164 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 66 recorded · 65 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 43 recorded · 42 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 12 recorded · 11 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · 0.9 min · 642 recorded · 639 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 · 24 · 24 recorded · 24 measured · Source: the US BTS 06:00 · 105 · 105 recorded · 104 measured · Source: the US BTS 07:00 · 623 · 623 recorded · 617 measured · Source: the US BTS 08:00 · 83 · 83 recorded · 81 measured · Source: the US BTS 09:00 · 166 · 166 recorded · 165 measured · Source: the US BTS 10:00 · 167 · 167 recorded · 166 measured · Source: the US BTS 11:00 · 64 · 64 recorded · 62 measured · Source: the US BTS 12:00 · 163 · 163 recorded · 163 measured · Source: the US BTS 13:00 · 230 · 230 recorded · 228 measured · Source: the US BTS 14:00 · 138 · 138 recorded · 136 measured · Source: the US BTS 15:00 · 62 · 62 recorded · 62 measured · Source: the US BTS 16:00 · 1 · 1 recorded · 1 measured · Source: the US BTS 17:00 · 167 · 167 recorded · 164 measured · Source: the US BTS 18:00 · 66 · 66 recorded · 65 measured · Source: the US BTS 19:00 · 20 · 20 recorded · 20 measured · Source: the US BTS 20:00 · 43 · 43 recorded · 42 measured · Source: the US BTS 21:00 · 12 · 12 recorded · 11 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · 642 · 642 recorded · 639 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———
05:00Fewer than 200 measured departures—2424
06:00Fewer than 200 measured departures—104105
07:0085.6%7.9 min617623
08:00Fewer than 200 measured departures—8183
09:00Fewer than 200 measured departures—165166
10:00Fewer than 200 measured departures—166167
11:00Fewer than 200 measured departures—6264
12:00Fewer than 200 measured departures—163163
13:0070.2%14.6 min228230
14:00Fewer than 200 measured departures—136138
15:00Fewer than 200 measured departures—6262
16:00Fewer than 200 measured departures—11
17:00Fewer than 200 measured departures—164167
18:00Fewer than 200 measured departures—6566
19:00Fewer than 200 measured departures—2020
20:00Fewer than 200 measured departures—4243
21:00Fewer than 200 measured departures—1112
22:00No observations———
23:0088.3%0.9 min639642

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 77.8% · 396 recorded · 388 measured · Source: the US BTS Tuesday · 85.4% · 377 recorded · 376 measured · Source: the US BTS Wednesday · 83.2% · 370 recorded · 369 measured · Source: the US BTS Thursday · 79.2% · 386 recorded · 385 measured · Source: the US BTS Friday · 78.0% · 390 recorded · 390 measured · Source: the US BTS Saturday · 78.9% · 457 recorded · 455 measured · Source: the US BTS Sunday · 74.9% · 400 recorded · 387 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 · 12.6 min · 396 recorded · 388 measured · Source: the US BTS Tuesday · 3.1 min · 377 recorded · 376 measured · Source: the US BTS Wednesday · 7.5 min · 370 recorded · 369 measured · Source: the US BTS Thursday · 9.0 min · 386 recorded · 385 measured · Source: the US BTS Friday · 11.2 min · 390 recorded · 390 measured · Source: the US BTS Saturday · 9.5 min · 457 recorded · 455 measured · Source: the US BTS Sunday · 14.0 min · 400 recorded · 387 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 · 396 · 396 recorded · 388 measured · Source: the US BTS Tuesday · 377 · 377 recorded · 376 measured · Source: the US BTS Wednesday · 370 · 370 recorded · 369 measured · Source: the US BTS Thursday · 386 · 386 recorded · 385 measured · Source: the US BTS Friday · 390 · 390 recorded · 390 measured · Source: the US BTS Saturday · 457 · 457 recorded · 455 measured · Source: the US BTS Sunday · 400 · 400 recorded · 387 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday77.8%12.6 min388396
Tuesday85.4%3.1 min376377
Wednesday83.2%7.5 min369370
Thursday79.2%9.0 min385386
Friday78.0%11.2 min390390
Saturday78.9%9.5 min455457
Sunday74.9%14.0 min387400

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% · 280 recorded · 270 measured · Source: the US BTS Feb · 74.9% · 306 recorded · 299 measured · Source: the US BTS Mar · 77.4% · 274 recorded · 274 measured · Source: the US BTS Apr · 85.5% · 244 recorded · 242 measured · Source: the US BTS May · 76.6% · 248 recorded · 248 measured · Source: the US BTS Jun · 73.1% · 256 recorded · 256 measured · Source: the US BTS Jul · 79.2% · 262 recorded · 259 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 126 recorded · 126 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Oct · 84.5% · 200 recorded · 200 measured · Source: the US BTS Nov · 88.2% · 222 recorded · 220 measured · Source: the US BTS Dec · 72.5% · 238 recorded · 236 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 · 11.2 min · 280 recorded · 270 measured · Source: the US BTS Feb · 11.2 min · 306 recorded · 299 measured · Source: the US BTS Mar · 9.9 min · 274 recorded · 274 measured · Source: the US BTS Apr · 4.5 min · 244 recorded · 242 measured · Source: the US BTS May · 11.5 min · 248 recorded · 248 measured · Source: the US BTS Jun · 14.8 min · 256 recorded · 256 measured · Source: the US BTS Jul · 12.6 min · 262 recorded · 259 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 126 recorded · 126 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Oct · 5.5 min · 200 recorded · 200 measured · Source: the US BTS Nov · 3.7 min · 222 recorded · 220 measured · Source: the US BTS Dec · 12.4 min · 238 recorded · 236 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 · 280 · 280 recorded · 270 measured · Source: the US BTS Feb · 306 · 306 recorded · 299 measured · Source: the US BTS Mar · 274 · 274 recorded · 274 measured · Source: the US BTS Apr · 244 · 244 recorded · 242 measured · Source: the US BTS May · 248 · 248 recorded · 248 measured · Source: the US BTS Jun · 256 · 256 recorded · 256 measured · Source: the US BTS Jul · 262 · 262 recorded · 259 measured · Source: the US BTS Aug · 126 · 126 recorded · 126 measured · Source: the US BTS Sep · 120 · 120 recorded · 120 measured · Source: the US BTS Oct · 200 · 200 recorded · 200 measured · Source: the US BTS Nov · 222 · 222 recorded · 220 measured · Source: the US BTS Dec · 238 · 238 recorded · 236 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan81.5%11.2 min270280
Feb74.9%11.2 min299306
Mar77.4%9.9 min274274
Apr85.5%4.5 min242244
May76.6%11.5 min248248
Jun73.1%14.8 min256256
Jul79.2%12.6 min259262
AugFewer than 200 measured departures—126126
SepFewer than 200 measured departures—120120
Oct84.5%5.5 min200200
Nov88.2%3.7 min220222
Dec72.5%12.4 min236238

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% 2,188
  • Delayed >15 min 20.2% 562
  • Cancelled 0.9% 26
  • 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

18
18 of 18
Flight numbersBy direction DeparturesOn time
DL2079 SLC → BWI 648 86.9%
DL1176 BWI → SLC 647 83.3%
WN657 BWI → SLC 92 82.4%
WN1593 SLC → BWI 61 70.0%
WN1021 BWI → SLC 58 87.9%
WN1755 SLC → BWI 57 77.2%
WN1953 BWI → SLC 52 76.5%
WN1944 BWI → SLC 50 80.0%
WN3735 SLC → BWI 50 74.0%
WN3108 SLC → BWI 47 68.9%
WN2242 BWI → SLC 46 87.0%
WN1598 SLC → BWI 45 73.3%
WN4289 SLC → BWI 40 92.5%
WN1159 BWI → SLC 33 42.4%
WN1453 BWI → SLC 33 72.7%
WN4466 SLC → BWI 32 84.4%
WN2264 BWI → SLC 30 76.7%
WN3352 SLC → BWI 30 73.3%

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 129 −0.8% 1 79.1%
June 2026 128 +0.0% 0 73.4%
May 2026 124 +0.0% 0 75.8%
April 2026 120 −1.6% 2 85.8%
March 2026 136 −1.4% 0 72.8%
February 2026 149 −0.7% 7 76.5%
January 2026 133 −2.9% 8 82.0%
December 2025 119 +1.7% 2 69.7%
November 2025 111 +1.8% 2 86.5%
October 2025 121 +53.2% 0 86.0%
September 2025 120 0 86.7%
August 2025 126 0 83.3%
July 2025 130 2 79.2%
June 2025 128 0 72.7%
May 2025 124 0 77.4%
April 2025 122 0 85.2%
March 2025 138 0 81.9%
February 2025 150 0 73.3%
January 2025 137 2 81.0%
December 2024 117 0 75.2%
November 2024 109 0 89.9%
October 2024 79 0 82.3%

How to read this chart

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