Cheap flights from Phoenix to London from £374

In general, January is the cheapest month to fly from Phoenix to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £78. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Phoenix averaging around £98.

On average, the least expensive day to fly to London Heathrow Airport from Phoenix is on a Monday. momondo users have found tickets for Monday departures for as low as £629. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £1,052.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Phoenix to London Heathrow Airport in the afternoon for as low as £739. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £835 on average. Flights to London Heathrow Airport from Phoenix in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Phoenix Sky Harbor Intl to London Heathrow for the best Phoenix - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Phoenix when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £708 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Phoenix for as low as £573 on momondo.

There are 3 cabin classes available to choose from on Phoenix to London Heathrow Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

9 flights are operational daily from Phoenix to London Heathrow Airport as of June 2026. The most popular departure time for this route is 16:00, with 73% of flights per day taking off in the afternoon.

As of June 2026, 63 flights take off from Phoenix and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.