Go to the Deutsche Bahn Web site to book your ticket (see Resources). Choose the "English" option located on the red menu bar on the left side of the page. You should be then directed to the "Find A Connection" page.
At the "Find A Connection" page, enter "Hamburg" and "Flensburg" for your starting and destination cities. Select your date and time of departure and return if you are purchasing a round trip. Note that there are many options that come up for "Flensburg." Select "Flensburg" from the available choices to find the fastest connection.
Select the means of transport search you prefer, choose the fastest connections and if bicycle storage will be necessary. Enter the number of travelers in each category: adult, children, seniors and youth. Input the ages of each passenger when requested.
Select your preferred travel option. Travel time between Hamburg and Flensburg is about 2 hours to 2 1/2 hours depending on the connection. The Regional Express without any train changes will get you there in 2 hours. (2 train changes seems to be the maximum.) Choose to reserve your seat and your seating class, first or second.
Register an account to get the maximum benefits for your ticket purchase. With an account, you can cancel and exchange tickets. Booking a ticket without an account is still possible--however, these additional ticket options will not be available.
Proceed to checkout and enter all obligatory personal and billing information to finish booking your ticket. Select the option to print your ticket directly from the Web site if possible. If this option is not available, your ticket will arrive within 3 to 5 days free of charge.
Save and print all of your confirmation records for your records. Make a note of all customer service information in the event of a mix-up or other problem.
