Frontier Airlines allows one free personal item (up to 8" x 14" x 18") per passenger and charges for carry-on bags (max 10" x 16" x 24", <35 lbs) and checked bags (max 62 linear inches, <40 lbs). Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) Fees for carry-on and checked bags vary by season and route and are cheaper when purchased at booking rather than at the airport. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) Overweight or oversized bags incur additional fees.