Why it Rates: If approved by government officials, this agreement will provide travelers with access a large network of budget fares between Mexico and the United States. —Mia Taylor, TravelPulse Senior Writer.Volaris (NYSE: VLRS and BMV: VOLAR) the ultra-low-cost airline serving Mexico, the United States and Central America announces the signing of a codeshare agreement with U.S. ultra-low-cost carrier Frontier Airlines, Inc. – subject to approval by authorities in Mexico and the United States.This agreement, one of the first ever between ultra-low-cost carriers, will open additional ultra-low fare travel options between Mexico and the United States. Volaris is excited to gain new access to cities in the U.S. not served by its network and Frontier is pleased to gain first-time access to new destinations in Mexico.With this codeshare, Volaris and Frontier will offer customers the ability to purchase the lowest fares across an extensive and well-served network.“At Volaris we are thrilled to join Frontier as one of the first ultra-low-cost carriers to enter a codeshare agreement. We estimate that our partnership will add around 20 new destinations to our network and 80 new routes between both Mexico and the United States,” Enrique Beltranena, CEO of Volaris, said in a statement.“Our goal is to unite families and friends on both sides of the border, and this new agreement with our partners at Frontier will allow us to expand the travel options for our audience while keeping fares low.”Volaris currently serves 24 destinations in the U.S. and 40 in Mexico, of which 21 coincide with Frontier destinations in both countries. The codeshare agreement greatly enhances the potential for connecting itineraries.“This agreement will allow us to expand upon our mission to deliver low fares and enable more people to fly,” Barry Biffle, president and CEO of Frontier said in a statement.“Many customers traveling between the U.S. and Mexico are forced to pay high fares to fly, and this agreement will provide lower fares to a vast majority of the U.S. and Mexico population. As the leading ultra-low-cost carrier in Mexico, Volaris is an ideal partner with which to align and we look forward to working together to deliver low fares to millions of people.”Source: Volaris press release