Delta's change fees vary by ticket type, route, and time of travel: there are no change fees for most Delta Main and above tickets for travel originating in the U.S. and Canada. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) However, Basic Economy (Delta Main Basic) fares are generally non-changeable and may only be canceled for a fee. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) Fees can range from $0 to $400 or more for international routes or specific markets, and a fare difference may apply for any change in price.