Question : Is there another local airport that can get you to Palm Springs?
Answer : Departing from London Heathrow Airport is not the only way to get to Palm Springs International Airport. Try searching for flights from London Gatwick Airport (LGW) as well. Over the next two months, flights from LGW to PSP are being booked 28% cheaper than flights from LHR to PSP. Being only 25 miles away, it's easily accessible for most.
Question : How long do most people visit Palm Springs?
Answer : Of course you're not most people, but if you were, you'd stay roughly one week.
Question : Can you cut down on flight costs by changing the day of the week you travel to Palm Springs?
Answer : The lowest-cost day to fly in August is Thursday. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.