United Airlines has partnered with Timeshifter to help passengers overcome jet lag. The app outlines the best time to see and avoid light, sleep and enjoy caffeine to adjust quickly to a new time zone.

The app is for customers flying across three or more time zones.

United Airlines will launch flights from New York to Cape Town, South Africa in December.

The app uses an algorithm based on several factors, including normal sleep pattern, flight details and individual preferences, to create a personalised jet lag alleviation plan.

All MileagePlus members will receive access to a free Timeshifter jet lag plan and Premier 1K members will receive a complimentary subscription.