Frontier’s mobile app makes travelling easier than ever before! Wanna skip the lines? Use our mobile boarding pass and go straight to the security checkpoint. Need to add a bag or select your seat? This app makes it easy. Now you can add you bag or seat after you make your initial booking and even after checking in. On the go, but need to book a flight? Shop our low, low fares here. Want a stretch seat, a checked and/or a carry-on bag? THE WORKS makes them available at one low price which includes refundability and no change fees. Wanna’ know the status of your flight? Get up-to-the-minute flight information here.