How to Use your eCredit on Delta? The eCredits are the values that one can use to buy delta flights. If you are looking for ways how to use your eCredit on Delta, it is quite easy. You can search for your eCredits on the delta website once you get your credit while purchasing the flights. You need to go to delta.com/redeem. Here you will be able to redeem your electronic tickets. Once redeemed, you can buy the fight ticket at relatively cheaper rates. If you want to know more about eCredits, you can call us on our customer service number. Also, when you are trying to redeem the voucher, but you are not able to do so, you can call the delta airlines agent.