PHX to BUF flight delays & on-time performance
Nonstop flights from Phoenix Sky Harbor International Airport to Buffalo Niagara International Airport · 1,912 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHX or BUF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Phoenix (PHX) to Buffalo (BUF) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1% 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 8am did best (88% on time); around 11am did worst (65%).
- Saturday was the most reliable day to fly (87% on time) and Sunday the least (63%).
- The largest source of delay minutes was late-arriving aircraft (40%).
Which airline is most on time from PHX to BUF?
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 | 76% | 1.0% | 11 min | 4.1% | 199 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am88%32 flights
- 9am67%64 flights
- 11am65%18 flights
- 1pm72%18 flights
- 3pm75%24 flights
- 4pm71%21 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday74%3.6% cancelled
- Tuesday86%0.0% cancelled
- Wednesday77%0.0% cancelled
- Thursday69%0.0% cancelled
- Friday71%0.0% cancelled
- Saturday87%0.0% cancelled
- Sunday63%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 aircraft40%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion18%
- Security8%
- Extreme weather0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
PHX to BUF: common questions
- How often are PHX to BUF flights on time?
- 76% 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 Phoenix to Buffalo cancelled?
- 1.0% of scheduled flights were cancelled (2 of 199).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 39 min behind schedule on average, and 4.1% of flights were an hour or more late.
- How long is taxi time at PHX?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BUF to PHX — 80% on time
More flights from Phoenix
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHX → BUF, nonstop flights by US airlines that report to the DOT. How we calculate this.