Airport month record
BWIJUN
Baltimore/Washington International Thurgood Marshall in June 2026
- Departures
- 8,045
- Month
- June 2026
- National, same month
- 74.3%
- Carriers
- 8
Historical statistics for June 2026, not live status or a forecast for this year’s June. For today’s conditions at BWI, see live FAA status.
BWI in June sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 3 points worse than the national rate of 74.3%. The late ones land about an hour behind schedule. That rests on 8,045 flights, of which Delta Air Lines flew 462 at 84.8% on time.
Delta Air Lines is the most reliable of the four carriers covered here at 84.8% on time across 462 flights.
Key figures
On time
70.9%
Arrivals under 15 minutes late, of 7,928 completed departures
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
1.16%
Nationally in June: 1.65%
Whole year
77.6%
BWI across all twelve months
These figures cover 8,045 departures from Baltimore/Washington International Thurgood Marshall in June 2026. 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
June next to BWI's other months
Against BWI's own year, June ran 7 points worse than the twelve-month rate of 77.6%, which makes it number ten of twelve months, best first.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 | 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 (this page) | 8,045 | 70.9% | 63 min | 1.16% | C |
Departure window
The best time of day to leave BWI in June
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 34 points, against 19 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,110 flights86.8%
- 8am–11am1,718 flights86.1%
- 11am–2pm1,137 flights76.1%
- 2pm–5pm1,212 flights63.8%
- 5pm–8pm1,450 flights60.2%
- 8pm–5am1,418 flights52.6%
Scale runs 45% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 52.6% on time, against 86.8% 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 1,718 flights scheduled in it.
Across the week, Tuesday is the strongest day at 79.6% on time and Thursday the weakest at 65.3%. 14 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at BWI in June
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 84.8% of the time; Frontier Airlines manages 65.9%. Sample sizes sit next to every figure, because a two-point gap across 388 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 6,231 | 69.4% | 59 min | 0.90% | C+ |
| Delta Air Lines | 462 | 84.8% | 103 min | 1.52% | B |
| Frontier Airlines | 388 | 65.9% | 70 min | 4.38% | C− |
| United Airlines | 387 | 70.4% | 68 min | 0.78% | C+ |
| American Airlinesthin sample | 284 | 80.4% | 101 min | 2.11% | B |
| Republic Airwaysthin sample | 139 | 79.7% | 65 min | 2.88% | B |
| Alaska Airlinesthin sample | 90 | 76.7% | 65 min | 0.00% | B+ |
| Envoy Airthin sample | 56 | 92.9% | 176 min | 0.00% | A+ |
Frontier Airlines cancels 4.4% 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 June
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| BWI to ATL · Atlanta | 480 | 78.1% | 79 min | 2.50% | B |
| BWI to MCO · Orlandothin sample | 362 | 72.1% | 73 min | 2.21% | C |
| BWI to BOS · Bostonthin sample | 302 | 73.9% | 58 min | 0.66% | C+ |
| BWI to CLT · Charlottethin sample | 259 | 82.0% | 87 min | 0.77% | B+ |
| BWI to DEN · Denverthin sample | 248 | 62.2% | 57 min | 0.00% | D+ |
| BWI to ORD · Chicagothin sample | 239 | 76.3% | 79 min | 2.09% | B |
| BWI to TPA · Tampathin sample | 210 | 77.4% | 53 min | 0.95% | B+ |
| BWI to DTW · Detroitthin sample | 203 | 79.4% | 108 min | 1.97% | B |
| BWI to FLL · Fort Lauderdalethin sample | 186 | 71.3% | 62 min | 2.69% | C |
| BWI to MIA · Miamithin sample | 179 | 69.7% | 85 min | 0.00% | C+ |
| BWI to MDW · Chicagothin sample | 171 | 69.5% | 83 min | 1.17% | C |
| BWI to DAL · Dallasthin sample | 154 | 62.7% | 69 min | 1.30% | D |
| BWI to RDU · Raleighthin sample | 154 | 80.3% | 61 min | 1.30% | B |
| BWI to BUF · Buffalothin sample | 150 | 76.9% | 68 min | 2.00% | B |
| BWI to PVD · Providencethin sample | 150 | 81.6% | 53 min | 1.33% | B |
| BWI to ALB · Albanythin sample | 149 | 78.4% | 49 min | 0.67% | B+ |
| BWI to BNA · Nashvillethin sample | 147 | 70.3% | 54 min | 0.68% | C+ |
| BWI to LAX · Los Angelesthin sample | 145 | 50.3% | 61 min | 0.00% | F+ |
| BWI to MHT · Manchesterthin sample | 145 | 84.1% | 81 min | 0.00% | B+ |
| BWI to BDL · Hartfordthin sample | 145 | 78.6% | 68 min | 0.00% | B+ |
| BWI to MSP · Minneapolisthin sample | 140 | 73.0% | 64 min | 2.14% | C |
| BWI to LAS · Las Vegasthin sample | 139 | 65.5% | 63 min | 0.00% | C+ |
| BWI to ORF · Norfolkthin sample | 139 | 70.5% | 62 min | 0.00% | C+ |
| BWI to ISP · Islipthin sample | 138 | 77.4% | 45 min | 0.72% | B+ |
| BWI to PWM · Portlandthin sample | 118 | 78.6% | 52 min | 0.85% | B+ |
Delay causes
What held BWI up in June
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 144,000 reported delay minutes.
- 41%Late-arriving aircraft
- 33%Carrier
- 21%National Airspace System
- 5%Extreme weather
- 0%Security
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 144,000 reported delay minutes here, that single category outweighs weather by 9 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 144,236 reported delay minutes.
Cancellations sit at 1.16% against a national 1.65%, which is ordinary. Diversions add another 0.30%.
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.6% of arrivals land a full hour or more behind schedule, against 9.7% 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 June
For a June trip through BWI: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 86.8% on time, and with 9.6% 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.