BUF to BWI flight delays & on-time performance
Nonstop flights from Buffalo Niagara International Airport to Baltimore/Washington International Thurgood Marshall Airport · 281 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BUF or BWI right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Buffalo (BUF) to Baltimore (BWI) arrived on time 87% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.4% were cancelled, and 4% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 6am did best (96% on time); around 5pm did worst (68%).
- Wednesday was the most reliable day to fly (91% on time) and Thursday the least (84%).
- The largest source of delay minutes was late-arriving aircraft (48%).
Which airline is most on time from BUF to BWI?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 87% | 1.4% | 8 min | 3.5% | 1,750 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am95%205 flights
- 6am96%158 flights
- 7am96%72 flights
- 8am89%156 flights
- 9am95%147 flights
- 10am92%67 flights
- 11am89%126 flights
- 12pm87%205 flights
- 1pm92%63 flights
- 2pm80%88 flights
- 3pm78%126 flights
- 4pm81%158 flights
- 5pm68%139 flights
- 6pm66%34 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday84%3.1% cancelled
- Tuesday90%1.2% cancelled
- Wednesday91%0.8% cancelled
- Thursday84%0.4% cancelled
- Friday86%1.1% cancelled
- Saturday87%0.4% cancelled
- Sunday88%2.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft48%
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion15%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather92%
- Airline (crew, maintenance, cleaning, fueling)8%
- Air traffic control & airport congestion0%
- Security0%
BUF to BWI: common questions
- How often are BUF to BWI flights on time?
- 87% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Buffalo to Baltimore cancelled?
- 1.4% of scheduled flights were cancelled (25 of 1,750).
- How long are typical delays?
- Across all flights the average arrival delay was 8 min (early arrivals count as zero). Flights that were late arrived 53 min behind schedule on average, and 3.5% of flights were an hour or more late.
- How long is taxi time at BUF?
- Flights on this route spent 12 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BWI to BUF — 77% on time
More flights from Buffalo
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BUF → BWI, nonstop flights by US airlines that report to the DOT. How we calculate this.