United is adding nearly 150 flights between its hubs and popular spring break destinations for the busy travel season. More specifically, it’s adding 31 flights to 12 islands in the Caribbean, 28 flights to seven cities in Mexico and 27 flights to seven destinations in Central America. In addition, it’s using its Denver hub to add five new temporary routes to four destinations in Florida: Destin (VPS), West Palm Beach (PBI), Pensacola (PNS) and Sarasota (SRQ) and one in Texas, South Padre Island (BRO).Destin (VPS), Pensacola (PNS) and Sarasota (SRQ) service will operate once a week on Saturdays while flights to West Palm Beach (PBI) will depart on Saturdays and return on Sunday. United will also bring service from Denver to South Padre Island-Brownsville (BRO) in Texas for a Saturday-only flight launching March 9 and lasting through the end of the month.The airline will be increasing flights to spring break destinations, aka warm-weather cities, over the next few months, as well. These are just temporary one-off flights to already-serviced destinations, however, it could be a good opportunity as award availability may have opened up on routes — meaning you could escape the northern cold for some southern warmth. In total, these destinations will have an increased capacity of 41,000 seats.You can transfer Chase Ultimate Reward points to United instantly if you do decide to book an award. Economy short-haul awards start from 10,000 miles one-way while all flights longer than 700 miles start at 12,500 miles. Economy awards to Mexico and Central begin at 17,500 miles one-way.The airline will add flights to international destinations:31 flights to 12 islands in the Caribbean28 additional flights to seven cities in Mexico27 flights to seven destinations in Central America including 16 flights to Costa RicaThree flights to GuatemalaThree flights to BelizeDomestically, these cities will see more service from United:Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Seven additional flights to Phoenix and Tucson, Arizona15 additional flights to 10 cities in FloridaEight more flights to four islands in Hawaii10 more flights Colorado ski destinations, including Vail, Crested Butte, Steamboat Springs and Telluride.