LHR to PHX flight delays
London (LHR) Phoenix, AZ (PHX)
334 flights · January 2025 – August 2026 · UK Civil Aviation Authority and US Bureau of Transportation Statistics
64.76%
Arrived on time
Within 15 minutes of schedule
0.6%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
19 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. American Airlines arrived on time 9.5 points more often than British Airways over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In April it ran 33.3 points more punctual than in January — 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.
This route does worse than its own airport. LHR as a whole runs 14 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
This is a late route. Flights from London to Phoenix miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
Which airline should you fly on this route?
Over January 2025 – August 2026, American Airlines arrived on time most often on LHR to PHX. British Airways was late most often. Flights ran closest to schedule in April and worst in January.
Every airline on LHR to PHX
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 | 210 | 61.24% | 0.48% | — | F |
| American Airlines | 124 | 70.73% | 0.81% | — | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
PHX to LHR Phoenix back to London 73.64% on time DOther routes from London
Common questions
Are flights from London to Phoenix usually delayed?
64.76% of flights on the LHR to PHX route arrived within 15 minutes of schedule, so roughly 4 in every ten arrived late. That is worse than the average route in this record.
Which airline is most on time from London to Phoenix?
American Airlines, at 70.73% on time across 124 flights. The least punctual on the route was British Airways at 61.24%.
How often are LHR to PHX flights cancelled?
0.6% of scheduled flights did not operate — about 6 in every thousand. That is in the normal range.
What is the best month to fly London to Phoenix?
April, when 80% of flights arrived on time. The worst was January at 46.7%.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on LHR to PHX 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 →