Good deals from the UK to California (outside London) are quite rare these days cities so here is one reasonable solution based on a Star Alliance member SAS. Return flights to San Francisco & Los Angeles are available when flying from Manchester, Birmingham, or London. Flights can be had for just £355 for a round-trip ticket. All deals are for a roundtrip and inclusive of taxes, fees, and hand luggage. Checked luggage is available for an extra fee. You will need either a U.S. visa or ESTA to enter the USA (charged at $21 per person and you must arrange it prior to departing the UK). Max stay 90 days with an ESTA or 12 months with an appropriate visa.
Flying from: Manchester, Birmingham, London Heathrow
Flying to: San Francisco, Los Angeles
Outbound travel dates: From late September 2023 to May 2024 (excl. Christmas and Easter Holidays).
Max stay: 3 months
Book by: Unknown
London Gatwick to California from £311 (we recommend these non-stop Norse Atlantic Airways flights)
Booking sample of cheap SAS flights to California from the UK from £355 return! As per our booking, your outbound flight from Manchester to Los Angeles would be on the 28th of February returning on the 13th of March 2020.