BUF to PHX flight delays & on-time performance
Nonstop flights from Buffalo Niagara International Airport to Phoenix Sky Harbor International Airport · 1,912 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BUF or PHX 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 Phoenix (PHX) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.5% were cancelled, and 7% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 6am did best (92% on time); around 3pm did worst (76%).
- Thursday was the most reliable day to fly (100% on time) and Wednesday the least (62%).
- The largest source of delay minutes was late-arriving aircraft (54%).
Which airline is most on time from BUF to PHX?
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 | 80% | 0.5% | 13 min | 7.1% | 199 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am92%26 flights
- 12pm82%17 flights
- 3pm76%60 flights
- 4pm85%48 flights
- 5pm50%12 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday85%3.6% cancelled
- Tuesday86%0.0% cancelled
- Wednesday62%0.0% cancelled
- Thursday100%0.0% cancelled
- Friday75%0.0% cancelled
- Saturday70%0.0% cancelled
- Sunday83%0.0% 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 aircraft54%
- Air traffic control & airport congestion30%
- Airline (crew, maintenance, cleaning, fueling)16%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
BUF to PHX: common questions
- How often are BUF to PHX flights on time?
- 80% 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 Phoenix cancelled?
- 0.5% of scheduled flights were cancelled (1 of 199).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 56 min behind schedule on average, and 7.1% of flights were an hour or more late.
- How long is taxi time at BUF?
- Flights on this route spent 13 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PHX to BUF — 76% 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 → PHX, nonstop flights by US airlines that report to the DOT. How we calculate this.