As a passenger on Koninklijke Luchtvaart Maatschappij N.V. airlines, commonly called KLM Royal Dutch Airlines or just "KLM," if you want to add a little extra luxury to your flight, book an upgrade to business class. You can purchase an upgrade online if you have booked a Full Flex Fare economy class ticket, call KLM or book at the airport upon departure if you don't have a Full Flex Fare. With an upgrade for your full flight, you can check more luggage, access KLM airport lounges, relax in a reclining, private "sleeper seat," eat a gourmet, three-course meal and enjoy nearly limitless entertainment on your personal entertainment system.

By Phone

Call a Flying Blue Service Center at to ask if seats are available for an upgrade. Reach the North American office at 800-375-8723.

Give your Flying Blue member number or your booking code so that the representative can retrieve your reservation.

Recite your credit card number to purchase an upgrade, or ask for an upgrade using your Flying Blue mileage.

Ask for an email copy of your upgrade confirmation.


Log in to your Flying Blue account on the KLM website ( by entering your account number.

Click "Manage my Account" and then "Change or Upgrade My Reservation" to find possible upgrades.

Select an upgraded seat, if it's available. Use your Flying Blue miles or a credit card to purchase the new reservation.

Enter your email address for a confirmation of your new seat.

At the Airport

Use your Flying Blue member number or reservation number to check in at a self-serve kiosk or with a check-in agent.

Ask the agent if seats are available in business class or push the "purchase an upgrade" tab on the self-serve kiosk screen.

Pay by cash or credit card at an automatic kiosk and by cash or credit if you are paying at a check-in desk.

Things You Will Need
  • Flying Blue member number

  • Booking code

  • Credit card