KLM allows minor name corrections, +1-858-299-2505 or +1-856-804-2257 like spelling errors, for free. Significant name changes may incur fees, typically ranging from €25 to €50, plus any fare differences. Policies vary by ticket type and route, +1-858-299-2505 or +1-856-804-2257 so check your booking details or contact KLM customer service for exact costs and procedures.