According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), Baltimore, MD (BWI) ranks #23 of 382 tracked US airports by total flights (most flights = #1). Baltimore, MD posts bottom-quartile on-time performance among the 382 tracked U.S. airports, as one of the busiest U.S. airports.
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BWI on-time rate vs. the national average
Behind the U.S. average across all 382 tracked airports.
Delay Cause Breakdown
Top delay cause: Carrier.
Total delay minutes: 6,709,746.
Late Aircraft38.2% (2,564,475 min)
Carrier38.9% (2,608,315 min)
NAS (National Aviation System)18.9% (1,269,295 min)
Weather3.7% (248,108 min)
Security0.3% (19,553 min)
BWI - seasonal on-time pattern
Best: February (90.6%) · worst: July (82.2%)
BWI - on-time rate by year
2020–2025, year-over-year trend.
BWI - taxi-out and taxi-in (monthly)
Average taxi-out 15.3 min · taxi-in 6.1 min over the last 24 reported months (U.S. airport mean taxi-out ≈ 16.4 min).
BWI's average taxi-out (15.3 min) sits near the recent U.S. airport mean (~16.4 min). Month-to-month, it swings from 14.1 min (February 2024) to 17.6 min (July 2025).
Two PlainFlights-derived comparison paths for Baltimore, MD, both outside Maryland so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.
The standout signal at Baltimore, MD is traffic scale: 1,049,006 BTS flights (2020–2025) place it #23 of 382 by book size. That busy-book footprint sits beside a 78% on-time rate (1 pts below the 79% national flight-weighted average), 230,270 delayed departures, and 13,150 cancellations (1.25% of the book).
Delay minutes concentrate in Carrier (38.2% late-aircraft, 38.9% carrier, 18.9% NAS, 3.7% weather, 0.3% security). As a busy airport, that mix matters more for connection planning than for a thin schedule.
On the multi-year calendar, BWI is strongest in February (90.6% on-time) and weakest in July (82.2%), a 8.4-point swing. Volume peaks in July (~15,960 flights/month). The busiest connecting route is to ATL (Atlanta) at 80.2% on-time. Field definitions: on-time performance explained.
Baltimore, MD vs. the national on-time distribution
On-time rate among all 382 tracked U.S. airports
78%Top 91%higher than 9% of 382 airports
Baltimore, MD
60%95%
U.S. airports by on-time rate, bucketed by value
Each bar is a band; taller bars hold more airports. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025).
Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.
BWI's on-time book sits in the slower half of the BTS set; check the delay mix and the worst month before treating the headline as typical.
Check the busiest route from BWI before you book a connection. See top routes →
Travel in February rather than July if your dates are flexible. Seasonal patterns →
Gate-to-wheels taxi-out averages 15.3 min here; check the monthly series before a tight connection. Taxi times →
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Frequently Asked Questions
What is Baltimore, MD's on-time rate?
Baltimore, MD (BWI) has a 78% on-time rate across 1,049,006 BTS-tracked flights (2020-2025), 1 pts below the 79% national flight-weighted average; that places it in roughly the bottom-quartile on-time performance.
How does BWI rank among U.S. airports by traffic volume?
Baltimore, MD ranks #23 of 382 tracked US airports by total BTS flights (most flights = #1), making it one of the busiest U.S. airports.
What's the most common cause of delays at Baltimore, MD?
Carrier is the leading delay cause at BWI, accounting for 38.9% of delay minutes. The full breakdown: 38.2% late-aircraft, 38.9% carrier, 18.9% NAS/air-traffic-control, 3.7% weather, and 0.3% security.
When is the best time to fly through Baltimore, MD?
February is historically BWI's strongest month at 90.6% on-time, while July is the weakest at 82.2%, a 8.4-point swing across the BTS historical record.
Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights