£122 Find Cheap Flights from California to the United Kingdom

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from California to the United Kingdom.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from California to the United Kingdom is likely to change within 7 days, so travellers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from California to the United Kingdom with an airline and back with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from California to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in the United Kingdom is London Gatwick Airport (LGW), with an average flight price of £290.

Based on KAYAK data, the cheapest day to fly to the United Kingdom is Tuesday when return tickets can be as cheap as £536. On the other hand, the most expensive day to fly is Saturday, when return prices are £631 on average.

The cheapest time of day to fly to the United Kingdom is generally in the morning, when round-trip flights cost £730 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to the United Kingdom is generally in the afternoon, which is peak travel time and where the average cost of a ticket is £884.

The cheapest ticket to the United Kingdom from California found in the last 72 hours was to London Gatwick Airport, at £232 return. The most popular route is Los Angeles (LAX) to London Gatwick Airport (LGW) and the cheapest return airline ticket found on this route in the last 72 hours was £232.

The cheapest month for flights from California to the United Kingdom is January, when tickets cost £494 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is £916 and £840 respectively.

To get a below-average price on the flight from California to the United Kingdom, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

An average direct flight from California to the United Kingdom takes 13h 56m, covering a distance of 5302 miles. The shortest route is Las Vegas (LAS) to London Heathrow Airport (LHR) with an average flight time of 9h 55m.

Based on KAYAK flight searches, the most popular destination is London (93% of total searches to the United Kingdom). The next most popular destinations are Edinburgh (3%) and Manchester (2%). Searches for flights to Southampton (1%), to Birmingham (1%), and to Belfast (0%) are also popular.