Phoenix to London Heathrow Flights (PHX to LHR): Nonstops, Flight Time and Getting into London

Two airlines fly this route nonstop

Phoenix to London Heathrow is one of the few long-haul routes from Sky Harbor with daily nonstop service. As of recent schedules, British Airways flies it every day and American flies it as well, with American and British Airways selling seats on each other's flights through their transatlantic partnership. Most departures leave Phoenix in the late afternoon or evening and land in London the following morning or early afternoon.

If you see a one-stop itinerary priced below the nonstops, it is usually American through Dallas/Fort Worth, Charlotte or Chicago, Delta through Atlanta, Minneapolis or New York JFK with Virgin Atlantic on the Atlantic leg, or United through Chicago, Denver, Newark or Washington Dulles. A connection adds three to five hours and a second security line, so weigh the saving against the time.

London has several airports. Heathrow is the one with the Phoenix nonstops and the best rail links to the city, so for most travellers it is the right choice. Gatwick and Stansted are served from Phoenix only via connections.

Flight time and distance in each direction

The great-circle distance between PHX and LHR is roughly 5,250 miles, about 8,450 km. Eastbound, Phoenix to London typically takes 10 to 10.5 hours in the air with the jet stream helping. Westbound, London to Phoenix runs 11 to 11.5 hours against the wind. You lose a night going east and gain the hours back coming home, landing in Phoenix in the afternoon or evening of the same calendar day you left London.

Departing from Phoenix Sky Harbor

Both British Airways and American depart from Terminal 4, Sky Harbor's largest terminal. Check-in for British Airways is in the international section; American's counters are spread through the terminal's main hall. Terminal 4 security is busiest in the early morning and late afternoon, and the London departures fall in the second peak, so arriving two and a half to three hours ahead is sensible if you are checking bags.

The free PHX Sky Train links Terminal 4 with Terminal 3, the economy parking lots, the rental car center and the 44th Street light rail station, so the Valley Metro light rail from downtown Phoenix or Tempe is a realistic way to reach the airport without a car.

Summer heat matters here. Afternoon temperatures above 115 degrees Fahrenheit can trigger weight restrictions or short delays on departing flights, so a tight connection in London after a summer departure from Phoenix is a risk worth avoiding.

Arriving at Heathrow and getting into London

British Airways arrivals from Phoenix use Terminal 5; American arrivals use Terminal 3. UK Border Force ePassport gates accept US passports, which keeps the queue moving, though several American arrivals land in the same morning window and 30 to 45 minutes at the border is not unusual.

From Heathrow into central London:

• Heathrow Express: nonstop to Paddington in about 15 minutes from Terminals 2 and 3, and a few minutes longer from Terminal 5. The fastest option, and cheaper when booked well ahead.
• Elizabeth line: through central London to Paddington, Bond Street, Liverpool Street and beyond in 30 to 45 minutes, with far more stops and no need to change at Paddington. Usually the best value for most hotels.
• Piccadilly line (Tube): about 50 minutes to the West End, cheapest, but awkward with large bags and crowded at rush hour.
• Taxi or ride-hailing: 45 to 90 minutes to central London depending on traffic, and expensive for the distance.

If you are connecting to a British Airways flight within Europe, you stay in Terminal 5. If you land on American and connect to British Airways, allow at least 90 minutes for the inter-terminal transfer.

When to fly and when to book

London is busiest from June to August and over the Christmas and New Year period, when fares from Phoenix are at their highest. April to May and September to October bring mild weather, longer daylight than winter and lighter demand. January and February are the quietest and cheapest months, grey but rarely very cold, and a good time for theatre and museums.

School holidays in both Arizona and England push up prices, including the English half-term weeks in February, late May and late October. For summer travel, book three to four months ahead; shoulder seasons are usually fine six to eight weeks out.

Entry requirements and documents

As of recent rules, US passport holders visiting the United Kingdom must hold an Electronic Travel Authorisation (ETA) before boarding. You apply through the official UK ETA app, it is linked to your passport and covers multiple visits over two years. Airlines check it at the gate in Phoenix and will not board you without it. Your passport needs to be valid for the whole stay.

Check the UK government website for the current process before you book, because the ETA scheme is new and its rules have been updated more than once. Border officers may ask about your onward plans and where you are staying.

Time zones and jet lag

Arizona does not observe daylight saving time, so the gap with London changes with the British clocks. London is 7 hours ahead of Phoenix in winter and 8 hours ahead from late March to late October. The overnight eastbound flight lands you in London mid-morning after a short night, and the first day is the hard one: stay outdoors, eat at local meal times and go to bed no earlier than mid-evening.

The return is gentler. You land in Phoenix in the late afternoon after a long day and most travellers are back to normal within two or three days.

What travellers on this route get wrong

The most common mistake is leaving the UK ETA until the airport and finding it has not cleared. The second is booking Heathrow Express when the Elizabeth line goes nearer their hotel for less. The third is a tight onward connection in London after a summer departure from Phoenix, when heat delays are possible. None ruins a trip, but each costs time or money you would rather spend in London.