Tipping when traveling.
April Masini, a columnist who writes “Ask April” at AskApril.com, provides these guidelines on tipping while traveling:
Airport or train porter: $1-$2
Cab driver: 10-18 percent, depending on the speed of the cab, your comfort level and how safe you feel during the drive
Hotel concierge: $10-$20, depending on request, at departure
Hotel maid: $2-$3 per night