They're America's three biggest airlines and all offer services between and New York, the biggest money-spinning airline corridor in the world.But how are American Airlines, Delta and United ensuring they reel in the big business-class bucks for this route?Travel experts from The Points Guy UK (TPG UK) find out by comparing the business-class cabins of each carrier on flights from London Heathrow to New York and , a video investigation that included timing how long it took before a glass of fizz was served after boarding.
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