Subway is offering Any Footlong Sub on a Buy One Get One FREE. The Free sub must be of equal or lesser value. This offer is ONLY valid when you order through the app or on their website. Note: there is a limit of one digital coupon per person. Any add-on extras will incur an additional charge. Hurry this offer FREE Footlong when you buy ANY Footlong at Subway online or in-app is for a limited time only! Discount shows in the cart if a shop is participating. Check before placing your order.