Airport reliability
Baltimore (BWI) on-time performance
How reliably flights leave Baltimore, MD (BWI) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
Baltimore, MD94,023 departures in 12 months
- Departures on time
- 75.4% U.S. average 75.6%
- Cancelled
- 2.0% U.S. average 1.9%
- 60+ minutes late
- 6.8% U.S. average 8.1%
- Scheduled departures
- 94,023 12 months
What this means
BWI departures ran below the U.S. average.
- 75.4% of the 94,023 scheduled departures from Baltimore (BWI) arrived at their destination on time, about the same as the U.S. average of 75.6%.
- 2.0% of departures were cancelled (U.S. average 1.9%), and 6.8% arrived an hour or more late.
- Flights arriving at BWI were on time 78.0% of the time.
- Among airlines with at least 300 departures, Delta Air Lines was the most punctual from BWI (83.4%) and Frontier Airlines the least (65.2%).
- Over the last 3 years, November was the most reliable month for departures from BWI (83.7% on time) and July the least reliable (62.6%).
- Cancellations peaked in January, when 4.5% of flights were cancelled.
- Flights scheduled to depart 6 am to 7 am were the most punctual (88.7% on time); flights scheduled to depart 10 pm to 11 pm were the least (57.2%).
Airlines at BWI
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| Delta Air Lines | 83.4% | 2.0% | 5.7% | 90 min | 5,297 |
| United Airlines | 79.1% | 0.9% | 6.3% | 72 min | 4,172 |
| American Airlines | 78.5% | 2.1% | 8.0% | 104 min | 3,473 |
| Republic AirwaysSold as American Eagle, Delta Connection, United Express | 77.4% | 4.3% | 8.2% | 88 min | 1,435 |
| Spirit Airlines | 75.9% | 3.3% | 7.8% | 74 min | 2,160 |
| Southwest Airlines | 75.0% | 1.8% | 6.4% | 55 min | 71,953 |
| Envoy AirSold as American Eagle | 74.1% | 3.3% | 9.6% | 82 min | 966 |
| Alaska Airlines | 68.6% | 0.8% | 8.3% | 52 min | 710 |
| JetBlue Airways | 67.5% | 5.0% | 7.5% | 81 min | 160 |
| Frontier Airlines | 65.2% | 4.0% | 12.7% | 88 min | 3,640 |
| PSA AirlinesSold as American Eagle | Insufficient sample | 39 | |||
| SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska | Insufficient sample | 18 | |||
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On-time rate by departure hour
Share of scheduled flights on time BWI average 75.4%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 87.8% | 691 |
| Departing 6 am to 7 am | 88.7% | 8,886 |
| Departing 7 am to 8 am | 86.2% | 3,517 |
| Departing 8 am to 9 am | 87.5% | 9,456 |
| Departing 9 am to 10 am | 84.2% | 4,007 |
| Departing 10 am to 11 am | 84.8% | 8,166 |
| Departing 11 am to noon | 82.2% | 5,180 |
| Departing noon to 1 pm | 77.5% | 3,732 |
| Departing 1 pm to 2 pm | 73.3% | 4,643 |
| Departing 2 pm to 3 pm | 74.1% | 4,279 |
| Departing 3 pm to 4 pm | 71.6% | 5,511 |
| Departing 4 pm to 5 pm | 69.1% | 4,974 |
| Departing 5 pm to 6 pm | 63.0% | 5,234 |
| Departing 6 pm to 7 pm | 65.4% | 6,780 |
| Departing 7 pm to 8 pm | 64.4% | 5,882 |
| Departing 8 pm to 9 pm | 63.3% | 5,880 |
| Departing 9 pm to 10 pm | 65.4% | 4,010 |
| Departing 10 pm to 11 pm | 57.2% | 3,195 |
Best and worst months at BWI
Share of scheduled flights on time 12-month average 75.4%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 74.2% | 21,579 |
| February | 82.0% | 20,017 |
| March | 75.6% | 23,806 |
| April | 78.2% | 24,378 |
| May | 72.3% | 25,226 |
| June | 68.7% | 25,484 |
| July | 62.6% | 26,476 |
| August | 70.3% | 25,296 |
| September | 80.9% | 24,253 |
| October | 81.7% | 25,661 |
| November | 83.7% | 23,810 |
| December | 75.4% | 24,189 |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 85.2% | 7,968 |
| Oct 2025 | 81.1% | 8,475 |
| Nov 2025 | 81.3% | 7,721 |
| Dec 2025 | 69.3% | 7,863 |
| Jan 2026 | 78.2% | 6,934 |
| Feb 2026 | 80.0% | 6,552 |
| Mar 2026 | 72.5% | 7,803 |
| Apr 2026 | 79.5% | 8,041 |
| May 2026 | 76.3% | 8,161 |
| Jun 2026 | 69.9% | 8,045 |
| Jul 2026 | 66.2% | 8,485 |
| Aug 2026 | 66.6% | 7,975 |
Busiest routes from BWI
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| Atlanta (ATL) | 77.8% | 2.3% | 4 | 5,405 |
| Orlando (MCO) | 73.3% | 2.6% | 3 | 4,707 |
| Boston (BOS) | 71.6% | 3.2% | 3 | 3,540 |
| Fort Lauderdale (FLL) | 72.4% | 2.7% | 4 | 3,168 |
| Charlotte (CLT) | 79.3% | 1.8% | 5 | 2,948 |
| Denver (DEN) | 74.5% | 1.4% | 3 | 2,784 |
| Chicago (ORD) | 73.3% | 2.5% | 8 | 2,677 |
| Tampa (TPA) | 76.3% | 2.0% | 3 | 2,651 |
| Miami (MIA) | 73.1% | 2.4% | 5 | 2,294 |
| Detroit (DTW) | 79.2% | 2.1% | 4 | 2,233 |
| Providence (PVD) | 77.6% | 2.3% | 1 | 1,846 |
| Chicago (MDW) | 72.8% | 2.4% | 2 | 1,824 |
| Dallas (DAL) | 73.9% | 2.1% | 1 | 1,794 |
| Nashville (BNA) | 77.7% | 1.8% | 2 | 1,789 |
| Raleigh/Durham (RDU) | 78.6% | 2.6% | 1 | 1,765 |
| Albany (ALB) | 78.9% | 1.8% | 1 | 1,740 |
| Las Vegas (LAS) | 77.9% | 0.9% | 2 | 1,739 |
| Buffalo (BUF) | 74.1% | 2.1% | 1 | 1,727 |
| Hartford (BDL) | 79.5% | 2.2% | 1 | 1,723 |
| Manchester (MHT) | 82.9% | 1.4% | 1 | 1,721 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Scheduled nonstop domestic departures from Baltimore, MD (BWI) by airlines that report to the DOT.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.