PHX to LHR flight delays
Phoenix, AZ (PHX) London (LHR)
792 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics and UK Civil Aviation Authority
69.74%
Arrived on time
Within 15 minutes of schedule
1.52%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
29 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In April it ran 41.5 points more punctual than in November — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The route has been getting worse. The later months run 8.4 points less punctual than the earlier ones. A drift of that size is rarely weather; it is more often an airline adding frequencies faster than the airports can absorb them.
The two directions do not behave alike. LHR to PHX arrives on time 6.4 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.
Flights from Phoenix to London run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over March 2025 – August 2026, American Airlines arrived on time most often on PHX to LHR. British Airways was late most often. Flights ran closest to schedule in April and worst in November.
Every airline on PHX to LHR
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 |
|---|---|---|---|---|---|
| British Airways | 487 | 68.26% | 1.03% | — | D |
| American Airlines | 305 | 72.15% | 2.3% | — | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
LHR to PHX London back to Phoenix 63.31% on time DOther routes from Phoenix
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on PHX to LHR during March 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 →