This is a common need. So I'll offer a general explanation.
Here's a simple Excel 2003 version of what I think you're looking for:
And here's a version from Excel 2007:
In the version from Excel 2003, the gray border rows at the top and bottom of each table help to ensure that your formulas continue to work as you add rows to your tables. In Excel 2007, the new Table features eliminate the need for the border rows.
In either version, you probably would maintain the Travel Times table in one sheet of your workbook, and your Working Hours table in another worksheet of the workbook.
Dropdown lists in each cell in the Place column of the Working Hours table let you choose which place you've traveled to. When you make a selection, the travel time appears in the Travel Time column. No macros are used.
To set this up, first create the Travel Times table as shown in either figure. In Excel 2003, be sure to set up the gray border-rows as shown. In Excel 2007, don't worry about the color formats, just enter your text.
Select the range from your column labels to the bottom of your table. Choose Ctrl+Shift+F3 to launch the Create Names dialog. Make sure that only Top Row is checked. The choose OK.
Or, if you want to use the menus to access Create Names...
...In Excel 2003, choose Insert, Name, Create.
...In Excel 2007, choose Formulas, Defined Names, Create From Selection.
In Excel 2007, take the extra step to set this figure up as a Table. To do so, make sure that the range F3:G7 still is selected, then press Ctrl+T. Or, if you want to use the menus, choose Insert, Tables, Table.
When you create the table, Excel will add a table format that you easily can change.
Set up the Working Hours table as shown in either figure. Assign the range names as with the first table. In Excel 2007, define the figure as a Table.
When Excel 2007 creates a Table, it automatically assigns Table Names like Table1, Table2, and so on. We need to change the name to something more useful. Therefore, select any cell in the Travel Times table. Choose "Table Tools" in the title bar above the row of tabs. Doing so will display the Design contextual tab for Tables.
In the Design tab, choose the Table name edit box in the Properties
group. (It probably will be "Table1".) Change this name to "TravelTimes"
(without the quotes, of course). Similarly, change the name of the
second table to "WorkHours".
The next step is to create the list box shown in column C in the figures above or below. To do so, select the area in column C where data will be entered. Then...
...in Excel 2003, choose Data, Validation.
...in Excel 2007, choose Data, Data Tools, Data Validation.
In the Settings tab, choose List in the Allow dropdown list box. In the Source edit box, enter:
Then choose OK.
(Note that "Places" is the name we assigned to the range of places in the Travel Times figure. )
With the data validation in place, Excel displays the control for the dropdown list box whenever you select a cell in the data area of the Place column in the Working Hours figure.
You can see these controls in the two figures below, which are repeated from above.
To add the Travel Time data to the Working Hours figure...
...In Excel 2003, enter this formula in the cell shown:
Now copy this formula down the column in the figure.
...In Excel 2007, enter this formula in the cell shown:
Here, enter the formula in one line, of course. After you do so, Excel will automatically copy the formula down the column of the Table.
This formula uses two new features of Excel 2007. First, IFERROR uses this syntax: =IFERROR(value,value_if_error), which is self-explanatory. Second, the MATCH function uses this reference for cell C4:
WorkHours[#This Row] [Place]
Notice that space here between "[#This Row]" and "[Place]". That space is necessary, because it tells Excel to return the value found at the intersection of the current row in the WorkHours table and the range named "Place".
To add rows to the tables...
...In Excel 2003, insert rows immediately above the bottom border and then copy the formula in the Travel Time column downward as needed.
...In Excel 2007, merely add new information to the first row below the table. When you do so, Excel automatically expands the table to include the new data. Excel also copies any formulas into that new row as necessary.
All the best,