Baltimore/Washington International Thurgood Marshall Airport (BWI) delays & on-time performance
Baltimore, Maryland · 73 nonstop destinations · 12 airlines · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BWI right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
On-time arrivals
78%
arrived < 15 min late
Cancelled
1.8%
1,663 flights
Avg arrival delay
14 min
60 min when late
Departed on time
73%
avg taxi-out 15 min
Figures cover 94,429 departures from BWI; on-time is measured at arrival. Arrivals into BWI were on time 80% of the time.
Key facts
- Flights departing Baltimore/Washington International Thurgood Marshall Airport (BWI) arrived on time 78% of the time in Aug 2025 – Jul 2026, in line with the national average.
- 1.8% were cancelled, and 7% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (86% on time); Frontier Airlines was the least (68%).
- Departures scheduled around 6am did best (91% on time); around 10pm did worst (60%).
- The largest source of delay minutes was late-arriving aircraft (40%).
Most delayed routes from BWI
Lowest on-time arrival rates among regularly flown routes.
- SMF · Sacramento64%364 flts
- SJU · San Juan67%1,162 flts
- SFO · San Francisco70%1,054 flts
- SEA · Seattle71%719 flts
- DFW · Dallas/Fort Worth73%1,338 flts
- GRR · Grand Rapids74%440 flts
- LAX · Los Angeles74%1,701 flts
- BOS · Boston75%3,517 flts
- MIA · Miami75%2,289 flts
- FLL · Fort Lauderdale75%3,135 flts
Most reliable routes from BWI
Highest on-time arrival rates among regularly flown routes.
- MHT · Manchester84%1,745 flts
- STL · St. Louis82%1,268 flts
- BDL · Hartford82%1,747 flts
- DTW · Detroit82%2,251 flts
- GSP · Greer82%720 flts
- CLT · Charlotte82%2,960 flts
- ALB · Albany81%1,760 flts
- CVG · Cincinnati81%721 flts
- SAV · Savannah81%995 flts
- RDU · Raleigh/Durham81%1,792 flts
Best airline at BWI
Departures from this airport, ranked by on-time arrival.
| Airline | On time | Cancelled | Avg delay | Routes | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 86% | 1.9% | 13 min | 4 | 5,308 |
| Republic Airways | 82% | 3.9% | 16 min | 2 | 1,424 |
| American Airlines | 81% | 2.2% | 20 min | 4 | 3,470 |
| United Airlines | 81% | 1.0% | 15 min | 5 | 4,177 |
| Spirit Airlines | 79% | 2.9% | 16 min | 18 | 2,630 |
| Southwest Airlines | 77% | 1.6% | 13 min | 71 | 72,159 |
| Envoy Air | 77% | 2.9% | 19 min | 4 | 964 |
| PSA Airlines | 77% | 0.0% | 14 min | 1 | 52 |
| Alaska Airlines | 72% | 0.9% | 15 min | 2 | 679 |
| JetBlue | 72% | 4.5% | 21 min | 1 | 67 |
| Frontier Airlines | 68% | 3.4% | 29 min | 14 | 3,470 |
| SkyWest Airlines | 66% | 0.0% | 23 min | 2 | 29 |
Best time to fly out of BWI
On-time arrival rate by scheduled departure hour (local time).
- 6am91%9,102 flts
- 7am88%3,517 flts
- 8am89%9,438 flts
- 9am86%3,969 flts
- 10am87%8,247 flts
- 11am84%5,032 flts
- 12pm79%3,686 flts
- 1pm76%4,607 flts
- 2pm76%4,451 flts
- 3pm74%5,483 flts
- 4pm73%4,888 flts
- 5pm66%5,125 flts
- 6pm69%6,845 flts
- 7pm67%5,850 flts
- 8pm67%5,911 flts
- 9pm68%4,211 flts
- 10pm60%3,292 flts
Monthly trend
Why departures were late
- Late-arriving aircraft40%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion21%
- Extreme weather5%
- Security1%
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.