BUF to BWI flight delays
Buffalo, NY (BUF) Baltimore, MD (BWI) · 281 miles
1,741 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
86.54%
Arrived on time
Within 15 minutes of schedule
1.61%
Cancelled
Share of scheduled flights
57 min
When late, late by
Average across delayed arrivals
9 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. BWI to BUF arrives on time 10.1 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This route does better than its own airport. Departures from BUF overall run 8.4 points less punctual than this particular one — so whatever congestion BUF has, this route is largely escaping it.
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Flights from Buffalo to Baltimore keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, Southwest Airlines arrived on time most often on BUF to BWI. Flights ran closest to schedule in September and worst in July.
Every airline on BUF to BWI
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 1,741 | 86.54% | 1.61% | 57 min | B |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
BWI to BUF Baltimore back to Buffalo 76.41% on time DCommon questions
Are flights from Buffalo to Baltimore usually delayed?
86.54% of flights on the BUF to BWI route arrived within 15 minutes of schedule, so roughly 1 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Buffalo to Baltimore?
Only Southwest Airlines appears in the published record on this route, with 1,741 flights and 86.54% arriving on time.
How often are BUF to BWI flights cancelled?
1.61% of scheduled flights did not operate — about 16 in every thousand. That is in the normal range.
What is the best month to fly Buffalo to Baltimore?
September, when 93.2% of flights arrived on time. The worst was July at 76.8%.
When BUF to BWI flights are late, how late are they?
About 57 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on BUF to BWI during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →