Northwest Ticket Fees Urge Web Use Beginning Friday, travelers on Northwest Airlines will have to pay as much as \$10 extra to buy tickets by phone or in person, rather than through Northwest's Web site. &lt;BR&gt;\&lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2"\ color="#666666"&gt;&lt;B&gt;-The Washington Post&lt;/B&gt;&lt;/FONT&gt;