BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BWI→BUF

Baltimore, MD (BWI) to Buffalo, NY (BUF) flight delay odds

74.9% of 1,739 official scheduled BWI-to-BUF flights arrived on time; 12.5% arrived at least 30 minutes late and 1.8% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
74.9%arrived on time
12.5%30+ min late
1.8%cancelled
1,739scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.9%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+7.8 mincompleted flights

Which departure time was most reliable for BWI to BUF?

Among qualifying BWI-to-BUF departure window results, Early morning had the highest on-time rate: 88.5% of 356 flights. Night was lowest at 54.3% across 267 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning35688.5%5.1%0.8%
Late morning36187.8%3.6%1.1%
Afternoon40372.0%13.9%1.2%
Evening35266.8%19.3%2.8%
Night26754.3%23.2%3.4%

Which weekday was most reliable for BWI to BUF?

Among qualifying BWI-to-BUF weekday results, Wednesday had the highest on-time rate: 80.9% of 251 flights. Sunday was lowest at 70.5% across 244 flights.

DayFlightsOn time30+ minCancelled
Monday25771.6%12.8%3.9%
Tuesday25678.1%9.0%0.8%
Wednesday25180.9%10.8%0.8%
Thursday25473.2%12.6%0.8%
Friday25475.6%14.6%1.6%
Saturday22374.0%13.5%0.4%
Sunday24470.5%14.3%4.1%

Which airline was most reliable for BWI to BUF?

Only Southwest Airlines met the BWI-to-BUF airline threshold: 74.9% of 1,739 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,73974.9%12.5%1.8%

Which month was most reliable for BWI to BUF?

Among qualifying BWI-to-BUF month results, September 2025 had the highest on-time rate: 87.1% of 147 flights. July 2025 was lowest at 57.9% across 145 flights.

MonthFlightsOn time30+ minCancelled
July 202514557.9%20.0%5.5%
August 202514881.8%12.2%0.0%
September 202514787.1%5.4%0.0%
October 202514980.5%10.7%0.0%
November 202514483.3%7.6%1.4%
December 202515265.1%15.1%3.9%
January 202612879.7%7.8%3.9%
February 202612976.7%8.5%3.9%
March 202614562.1%20.7%1.4%
April 202614879.1%10.8%0.0%
May 202615470.8%14.3%0.0%
June 202615075.3%15.3%2.0%

What drove BWI to BUF delay minutes?

Late aircraft was the largest recorded BWI-to-BUF delay category, accounting for 45.1% of 21,330 BTS-attributed delay minutes during July 2025–June 2026.

Airline36.5%
Late aircraft45.1%
National airspace15.4%
Weather2.2%
Security0.8%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.