Airport month record
BWIJUL
Baltimore/Washington International Thurgood Marshall in July 2025
- Departures
- 8,922
- Month
- July 2025
- National, same month
- 71.1%
- Carriers
- 9
Historical statistics for July 2025, not live status or a forecast for this year’s July. For today’s conditions at BWI, see live FAA status.
BWI in July carries a cancellation problem, not just a delay problem: 3.6% of scheduled flights never operate, against 2.5% nationally. Of the ones that do fly, about two flights in three arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 8,922 flights, of which Delta Air Lines flew 471 at 75.9% on time.
Delta Air Lines is the most reliable of the four carriers covered here at 75.9% on time across 471 flights.
Key figures
On time
66.2%
Arrivals under 15 minutes late, of 8,574 completed departures
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
3.64%
Nationally in July: 2.45%
Whole year
77.6%
BWI across all twelve months
These figures cover 8,922 departures from Baltimore/Washington International Thurgood Marshall in July 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
July next to BWI's other months
Against BWI's own year, July ran 11 points worse than the twelve-month rate of 77.6%, which makes it the worst of the twelve months in the data. Cancellations are where July stands out: 3.64% of scheduled departures were called off, 2.1 times the airport's rate across the year.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 (this page) | 8,922 | 66.2% | 92 min | 3.64% | C− |
| August 2025 | 8,381 | 78.8% | 62 min | 0.76% | B+ |
| September 2025 | 7,968 | 85.5% | 56 min | 0.18% | A+ |
| October 2025 | 8,475 | 81.4% | 49 min | 0.14% | B+ |
| November 2025 | 7,721 | 82.9% | 62 min | 1.80% | B |
| December 2025 | 7,863 | 70.4% | 54 min | 1.27% | C |
| January 2026 | 6,934 | 82.9% | 53 min | 5.61% | B− |
| February 2026 | 6,552 | 83.1% | 58 min | 3.59% | B− |
| March 2026 | 7,803 | 74.6% | 69 min | 2.58% | C |
| April 2026 | 8,041 | 79.9% | 55 min | 0.34% | B+ |
| May 2026 | 8,161 | 76.7% | 59 min | 0.28% | B+ |
| June 2026 | 8,045 | 70.9% | 63 min | 1.16% | C |
Departure window
The best time of day to leave BWI in July
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 46 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,354 flights88.8%
- 8am–11am2,045 flights86.2%
- 11am–2pm1,105 flights72.5%
- 2pm–5pm1,458 flights54.3%
- 5pm–8pm1,534 flights44.6%
- 8pm–5am1,426 flights43.3%
Scale runs 35% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 43.3% on time, against 88.8% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 2,045 flights scheduled in it.
Across the week, Friday is the strongest day at 72.8% on time and Sunday the weakest at 58.4%. 14 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at BWI in July
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 75.9% of the time; Southwest Airlines manages 65.4%. Sample sizes sit next to every figure, because a two-point gap across 6,643 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 6,643 | 65.4% | 86 min | 3.73% | C− |
| Spirit Airlines | 529 | 71.7% | 99 min | 3.02% | C− |
| Delta Air Lines | 471 | 75.9% | 101 min | 1.49% | B |
| United Airlines | 378 | 75.7% | 121 min | 1.32% | B |
| American Airlinesthin sample | 318 | 65.2% | 125 min | 5.66% | C− |
| Frontier Airlinesthin sample | 283 | 49.2% | 119 min | 6.71% | F− |
| Republic Airwaysthin sample | 122 | 77.8% | 103 min | 4.10% | B− |
| Envoy Airthin sample | 90 | 65.1% | 97 min | 6.67% | C− |
| Alaska Airlinesthin sample | 61 | 58.3% | 64 min | 0.00% | D+ |
Southwest Airlines cancels 3.7% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Busiest routes out of BWI in July
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| BWI to ATL · Atlanta | 506 | 66.2% | 93 min | 2.96% | C |
| BWI to MCO · Orlando | 419 | 65.0% | 88 min | 4.53% | C− |
| BWI to BOS · Boston | 365 | 70.3% | 89 min | 4.93% | C− |
| BWI to DEN · Denverthin sample | 317 | 64.1% | 102 min | 2.84% | D |
| BWI to CLT · Charlottethin sample | 310 | 64.2% | 132 min | 5.16% | D− |
| BWI to TPA · Tampathin sample | 260 | 70.1% | 95 min | 3.08% | C− |
| BWI to FLL · Fort Lauderdalethin sample | 246 | 73.2% | 96 min | 2.44% | C |
| BWI to ORD · Chicagothin sample | 243 | 64.7% | 119 min | 4.12% | D− |
| BWI to DTW · Detroitthin sample | 216 | 72.4% | 104 min | 2.78% | C |
| BWI to MIA · Miamithin sample | 189 | 59.4% | 91 min | 4.76% | D− |
| BWI to MDW · Chicagothin sample | 187 | 62.0% | 87 min | 4.28% | D− |
| BWI to LAX · Los Angelesthin sample | 176 | 71.2% | 97 min | 3.41% | C− |
| BWI to DAL · Dallasthin sample | 173 | 67.3% | 89 min | 4.62% | C− |
| BWI to BNA · Nashvillethin sample | 173 | 72.9% | 79 min | 3.47% | C− |
| BWI to LAS · Las Vegasthin sample | 171 | 66.3% | 78 min | 4.68% | C− |
| BWI to RDU · Raleighthin sample | 169 | 71.0% | 95 min | 4.14% | C− |
| BWI to PVD · Providencethin sample | 162 | 67.7% | 109 min | 4.32% | C− |
| BWI to BDL · Hartfordthin sample | 158 | 72.0% | 89 min | 4.43% | C− |
| BWI to DFW · Dallas-Fort Worththin sample | 147 | 61.0% | 103 min | 4.08% | D− |
| BWI to BUF · Buffalothin sample | 145 | 61.3% | 65 min | 5.52% | D− |
| BWI to ALB · Albanythin sample | 145 | 64.0% | 64 min | 4.14% | D− |
| BWI to MSP · Minneapolisthin sample | 143 | 66.2% | 134 min | 0.70% | C+ |
| BWI to SJU · San Juanthin sample | 141 | 55.9% | 86 min | 3.55% | D− |
| BWI to ORF · Norfolkthin sample | 135 | 62.3% | 72 min | 3.70% | D− |
| BWI to MHT · Manchesterthin sample | 132 | 62.7% | 89 min | 4.55% | D− |
Delay causes
What held BWI up in July
One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 266,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 43%Late-arriving aircraft
- 23%Carrier
- 21%National Airspace System
- 14%Extreme weather
- 0%Security
Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the comparison with the other months below is the more useful view of the risk. The national share is 7%, so this operation carries roughly 1.9 times the usual weather exposure. The split is drawn from 266,379 reported delay minutes.
Cancellations run at 3.64%, against 2.45% nationally. That is roughly one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.7% of arrivals land a full hour or more behind schedule, against 12.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
What to do with this
Flying from BWI in July
For a July trip through BWI: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 88.8% on time, and with 15.7% of arrivals an hour or more late, a connection here deserves more slack than the same trip in September would.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.