noun
BAD : There was already a long row of passengers waiting to be checked in.
GOOD : There was already a long queue of passengers waiting to be checked in.
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row = a line of people or things: 'Along one side of the river there was a row of cottages.' 'When our coach arrived at the hotel, the staff were standing in a row waiting to greet us.' 'At school I always used to sit in the front row.'
queue = (British English) a line of people standing one behind the other, waiting for a bus, to buy a ticket, etc: 'I never go to the bank at lunchtime because of the long queues.'