One way fare is $2.25 cash. You must have exact change if paying the cashier. The cashier cannot make change. Quick Trips are available from the Fare Kiosks located at all Broad Street and Market-Frankford Line stations. The kiosks accept credit/debit cards and cash [no exact change needed!]. Note, a Quick Trip is a one-way ticket, good for 24 hours. It can only be used at the station from which it is purchased.
Your best bet, is a SEPTA Key Card. Like a Quick Trip, it is also available from the Fare Kiosks but unlike a Quick Trip, it is reloadable and reusable. The SEPTA Key Travel Wallet allows you to pay as you go and you'll receive a discount for each ride ($1.80 versus the $2.25 cash fare). You must load a minimum of $10 [which will get you 5 rides]. Funds in your Travel Wallet can only be used to pay for one (1) person. It cannot be tapped multiple times to pay for anyone traveling with you.
Best part – your SEPTA Key gets you more than just a ride. Flash it for discounts on food, drink, museums, sports, shops and more. Click here for a full list of Partners.