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353 km · Domestic

Baltimore/Washington International Thurgood Marshall (BWI) – Long Island MacArthur (ISP)

In July 2026, 281 flights operated between Baltimore/Washington International Thurgood Marshall and Long Island MacArthur (both directions), and 70.8% 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
January177179▲ 1.1%
February164159▼ 3.0%
March174172▼ 1.1%
April212213▲ 0.5%
May2282280.0%
June246275▲ 11.8%
July245281▲ 14.7%
August194––
September180––
October186–in progress
November177––
December185––
Year to date (Jan–Jul)1,4461,507▲ 4.2%

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
January84.7%84.9%▲ 0.2%
February90.2%84.3%▼ 6.5%
March77.0%67.4%▼ 12.5%
April83.5%78.9%▼ 5.5%
May67.5%77.2%▲ 14.4%
June68.3%74.9%▲ 9.7%
July65.3%70.8%▲ 8.4%
August71.6%––
September84.4%––
October80.1%–in progress
November79.7%––
December68.1%––
Year-to-date average (Jan–Jul)76.6%76.9%▲ 0.4%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January27▲ 250.0%
February010–
March47▲ 75.0%
April00–
May00–
June02–
July11110.0%
August0––
September0––
October0–in progress
November4––
December1––
Year to date (Jan–Jul)1737▲ 117.6%

By direction

BWI → ISP

Scheduled flights
2,211
Flights operated
2,176
Cancelled
35 · 1.6%
On-time departures
70.9%

ISP → BWI

Scheduled flights
2,209
Flights operated
2,183
Cancelled
26 · 1.2%
On-time departures
82.7%

BWI → ISP and ISP → BWI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 4,420 100.0% 76.8% 61

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 delay06:00–07:000.8min · 422 recorded · 416 measured
Gap to highest-delay hour28.1min06:00 ↔ 22:00
Recorded flights4,420BWI–ISP

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 · 96.4% · 252 recorded · 249 measured · Source: the US BTS 06:00 · 96.6% · 422 recorded · 416 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 105 recorded · 105 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 153 recorded · 151 measured · Source: the US BTS 10:00 · 80.3% · 552 recorded · 549 measured · Source: the US BTS 11:00 · 84.6% · 275 recorded · 272 measured · Source: the US BTS 12:00 · 76.4% · 348 recorded · 347 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 200 recorded · 199 measured · Source: the US BTS 14:00 · 74.6% · 222 recorded · 220 measured · Source: the US BTS 15:00 · 74.2% · 363 recorded · 356 measured · Source: the US BTS 16:00 · 68.2% · 342 recorded · 336 measured · Source: the US BTS 17:00 · 66.8% · 309 recorded · 301 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 86 recorded · 84 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 111 recorded · 108 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 122 recorded · 122 measured · Source: the US BTS 21:00 · 69.4% · 228 recorded · 222 measured · Source: the US BTS 22:00 · 47.5% · 305 recorded · 297 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 · 2.5 min · 252 recorded · 249 measured · Source: the US BTS 06:00 · 0.8 min · 422 recorded · 416 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 105 recorded · 105 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 153 recorded · 151 measured · Source: the US BTS 10:00 · 10.1 min · 552 recorded · 549 measured · Source: the US BTS 11:00 · 6.7 min · 275 recorded · 272 measured · Source: the US BTS 12:00 · 12.0 min · 348 recorded · 347 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 200 recorded · 199 measured · Source: the US BTS 14:00 · 18.0 min · 222 recorded · 220 measured · Source: the US BTS 15:00 · 13.8 min · 363 recorded · 356 measured · Source: the US BTS 16:00 · 19.1 min · 342 recorded · 336 measured · Source: the US BTS 17:00 · 18.6 min · 309 recorded · 301 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 86 recorded · 84 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 111 recorded · 108 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 122 recorded · 122 measured · Source: the US BTS 21:00 · 17.4 min · 228 recorded · 222 measured · Source: the US BTS 22:00 · 28.9 min · 305 recorded · 297 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 · 252 · 252 recorded · 249 measured · Source: the US BTS 06:00 · 422 · 422 recorded · 416 measured · Source: the US BTS 07:00 · 25 · 25 recorded · 25 measured · Source: the US BTS 08:00 · 105 · 105 recorded · 105 measured · Source: the US BTS 09:00 · 153 · 153 recorded · 151 measured · Source: the US BTS 10:00 · 552 · 552 recorded · 549 measured · Source: the US BTS 11:00 · 275 · 275 recorded · 272 measured · Source: the US BTS 12:00 · 348 · 348 recorded · 347 measured · Source: the US BTS 13:00 · 200 · 200 recorded · 199 measured · Source: the US BTS 14:00 · 222 · 222 recorded · 220 measured · Source: the US BTS 15:00 · 363 · 363 recorded · 356 measured · Source: the US BTS 16:00 · 342 · 342 recorded · 336 measured · Source: the US BTS 17:00 · 309 · 309 recorded · 301 measured · Source: the US BTS 18:00 · 86 · 86 recorded · 84 measured · Source: the US BTS 19:00 · 111 · 111 recorded · 108 measured · Source: the US BTS 20:00 · 122 · 122 recorded · 122 measured · Source: the US BTS 21:00 · 228 · 228 recorded · 222 measured · Source: the US BTS 22:00 · 305 · 305 recorded · 297 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———
05:0096.4%2.5 min249252
06:0096.6%0.8 min416422
07:00Fewer than 200 measured departures—2525
08:00Fewer than 200 measured departures—105105
09:00Fewer than 200 measured departures—151153
10:0080.3%10.1 min549552
11:0084.6%6.7 min272275
12:0076.4%12.0 min347348
13:00Fewer than 200 measured departures—199200
14:0074.6%18.0 min220222
15:0074.2%13.8 min356363
16:0068.2%19.1 min336342
17:0066.8%18.6 min301309
18:00Fewer than 200 measured departures—8486
19:00Fewer than 200 measured departures—108111
20:00Fewer than 200 measured departures—122122
21:0069.4%17.4 min222228
22:0047.5%28.9 min297305
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 73.1% · 662 recorded · 642 measured · Source: the US BTS Tuesday · 80.0% · 648 recorded · 641 measured · Source: the US BTS Wednesday · 82.1% · 648 recorded · 643 measured · Source: the US BTS Thursday · 74.1% · 664 recorded · 660 measured · Source: the US BTS Friday · 78.7% · 666 recorded · 663 measured · Source: the US BTS Saturday · 78.7% · 550 recorded · 545 measured · Source: the US BTS Sunday · 70.3% · 582 recorded · 565 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 · 18.7 min · 662 recorded · 642 measured · Source: the US BTS Tuesday · 9.0 min · 648 recorded · 641 measured · Source: the US BTS Wednesday · 9.7 min · 648 recorded · 643 measured · Source: the US BTS Thursday · 14.5 min · 664 recorded · 660 measured · Source: the US BTS Friday · 11.3 min · 666 recorded · 663 measured · Source: the US BTS Saturday · 10.7 min · 550 recorded · 545 measured · Source: the US BTS Sunday · 16.0 min · 582 recorded · 565 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 · 662 · 662 recorded · 642 measured · Source: the US BTS Tuesday · 648 · 648 recorded · 641 measured · Source: the US BTS Wednesday · 648 · 648 recorded · 643 measured · Source: the US BTS Thursday · 664 · 664 recorded · 660 measured · Source: the US BTS Friday · 666 · 666 recorded · 663 measured · Source: the US BTS Saturday · 550 · 550 recorded · 545 measured · Source: the US BTS Sunday · 582 · 582 recorded · 565 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday73.1%18.7 min642662
Tuesday80.0%9.0 min641648
Wednesday82.1%9.7 min643648
Thursday74.1%14.5 min660664
Friday78.7%11.3 min663666
Saturday78.7%10.7 min545550
Sunday70.3%16.0 min565582

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 · 84.8% · 365 recorded · 356 measured · Source: the US BTS Feb · 87.3% · 333 recorded · 323 measured · Source: the US BTS Mar · 72.3% · 357 recorded · 346 measured · Source: the US BTS Apr · 81.2% · 425 recorded · 425 measured · Source: the US BTS May · 72.4% · 456 recorded · 456 measured · Source: the US BTS Jun · 71.8% · 523 recorded · 521 measured · Source: the US BTS Jul · 68.3% · 548 recorded · 526 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 194 recorded · 194 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 80.4% · 306 recorded · 306 measured · Source: the US BTS Nov · 83.1% · 359 recorded · 355 measured · Source: the US BTS Dec · 73.6% · 374 recorded · 371 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 · 4.7 min · 365 recorded · 356 measured · Source: the US BTS Feb · 4.4 min · 333 recorded · 323 measured · Source: the US BTS Mar · 16.8 min · 357 recorded · 346 measured · Source: the US BTS Apr · 7.9 min · 425 recorded · 425 measured · Source: the US BTS May · 19.9 min · 456 recorded · 456 measured · Source: the US BTS Jun · 14.9 min · 523 recorded · 521 measured · Source: the US BTS Jul · 22.6 min · 548 recorded · 526 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 194 recorded · 194 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 9.2 min · 306 recorded · 306 measured · Source: the US BTS Nov · 7.3 min · 359 recorded · 355 measured · Source: the US BTS Dec · 12.3 min · 374 recorded · 371 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 · 365 · 365 recorded · 356 measured · Source: the US BTS Feb · 333 · 333 recorded · 323 measured · Source: the US BTS Mar · 357 · 357 recorded · 346 measured · Source: the US BTS Apr · 425 · 425 recorded · 425 measured · Source: the US BTS May · 456 · 456 recorded · 456 measured · Source: the US BTS Jun · 523 · 523 recorded · 521 measured · Source: the US BTS Jul · 548 · 548 recorded · 526 measured · Source: the US BTS Aug · 194 · 194 recorded · 194 measured · Source: the US BTS Sep · 180 · 180 recorded · 180 measured · Source: the US BTS Oct · 306 · 306 recorded · 306 measured · Source: the US BTS Nov · 359 · 359 recorded · 355 measured · Source: the US BTS Dec · 374 · 374 recorded · 371 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
Jan84.8%4.7 min356365
Feb87.3%4.4 min323333
Mar72.3%16.8 min346357
Apr81.2%7.9 min425425
May72.4%19.9 min456456
Jun71.8%14.9 min521523
Jul68.3%22.6 min526548
AugFewer than 200 measured departures—194194
SepFewer than 200 measured departures—180180
Oct80.4%9.2 min306306
Nov83.1%7.3 min355359
Dec73.6%12.3 min371374

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 75.7% 3,347
  • Delayed >15 min 22.9% 1,012
  • Cancelled 1.4% 61
  • 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

58
58 of 58
Flight numbersBy direction DeparturesOn time
WN508 ISP → BWI 122 95.0%
WN168 ISP → BWI 98 88.7%
WN930 ISP → BWI 83 89.2%
WN2467 BWI → ISP 68 91.2%
WN684 BWI → ISP 64 57.1%
WN4866 BWI → ISP 62 95.2%
WN1725 BWI → ISP 61 40.4%
WN954 BWI → ISP 60 56.7%
WN1156 BWI → ISP 58 82.8%
WN2160 ISP → BWI 58 94.8%
WN3522 ISP → BWI 58 94.8%
WN3628 BWI → ISP 58 74.1%
WN4775 BWI → ISP 58 89.3%
WN4874 ISP → BWI 58 94.4%
WN682 ISP → BWI 58 96.6%
WN921 BWI → ISP 58 81.8%
WN2141 ISP → BWI 57 92.9%
WN2143 ISP → BWI 57 69.6%
WN4126 BWI → ISP 57 58.2%
WN4321 BWI → ISP 57 38.9%
WN2145 ISP → BWI 54 59.6%
WN1318 BWI → ISP 50 72.0%
WN2137 BWI → ISP 50 83.3%
WN2153 BWI → ISP 50 74.0%
WN3090 BWI → ISP 50 82.0%
WN3161 BWI → ISP 50 52.0%
WN534 ISP → BWI 50 78.0%
WN4691 BWI → ISP 49 81.6%
WN1873 ISP → BWI 47 77.8%
WN207 ISP → BWI 46 87.0%
WN1342 ISP → BWI 45 97.8%
WN3665 ISP → BWI 45 66.7%
WN1718 BWI → ISP 43 78.6%
WN1698 BWI → ISP 42 85.7%
WN1959 ISP → BWI 42 95.2%
WN2120 BWI → ISP 42 61.9%
WN3077 ISP → BWI 42 87.5%
WN3081 ISP → BWI 42 83.3%
WN4584 ISP → BWI 42 97.6%
WN921 ISP → BWI 42 69.1%
WN4494 BWI → ISP 41 82.1%
WN4816 BWI → ISP 41 92.5%
WN1782 ISP → BWI 40 85.0%
WN2029 ISP → BWI 39 87.2%
WN4096 BWI → ISP 39 56.4%
WN4721 BWI → ISP 36 69.4%
WN4794 ISP → BWI 35 88.2%
WN1093 BWI → ISP 34 67.7%
WN2357 BWI → ISP 34 76.5%
WN993 ISP → BWI 34 82.4%
WN1187 ISP → BWI 33 96.9%
WN3080 ISP → BWI 33 90.9%
WN1800 ISP → BWI 32 71.9%
WN2053 BWI → ISP 32 36.7%
WN2939 ISP → BWI 32 56.7%
WN1487 ISP → BWI 31 93.6%
WN1533 BWI → ISP 31 77.4%
WN1757 BWI → ISP 30 63.3%

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 281 +14.7% 11 70.8%
June 2026 275 +11.8% 2 74.9%
May 2026 228 +0.0% 0 77.2%
April 2026 213 +0.5% 0 78.9%
March 2026 172 −1.1% 7 67.4%
February 2026 159 −3.0% 10 84.3%
January 2026 179 +1.1% 7 84.9%
December 2025 185 −0.5% 1 68.1%
November 2025 177 −0.6% 4 79.7%
October 2025 186 +55.0% 0 80.1%
September 2025 180 0 84.4%
August 2025 194 0 71.6%
July 2025 245 11 65.3%
June 2025 246 0 68.3%
May 2025 228 0 67.5%
April 2025 212 0 83.5%
March 2025 174 4 77.0%
February 2025 164 0 90.2%
January 2025 177 2 84.7%
December 2024 186 2 79.0%
November 2024 178 0 86.5%
October 2024 120 0 80.8%

How to read this chart

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