Northwest AirlinesFAQ client

We understand your need for proof of travel. If you bought your ticket online from Northwest Airlines' website, a receipt should have been sent to your email right after purchase. If you can't locate that, trying logging into your account on the Northwest Airlines website to view your past flight details. Also, you might find helpful information on your bank statement if you used a credit or debit card for the purchase. If you are still unable to locate your invoice, please contact the airline directly as they should be able to provide you with a copy.