The Spanish phrase "boletos baratos a Guadalajara" means "cheap tickets to Guadalajara." It may be a search for cheap airline tickets to Guadalajara, or an advertisement for them.
"Boletos" means tickets and can refer to any kind of ticket. In this context, it likely refers to airline tickets. "Barato" is an adjective meaning cheap, here written in the masculine plural to agree with noun it modifies. Guadalajara is the second largest city in Mexico, located in the state of Jalisco. A Web search for "boletos baratos a Guadalajara" will yield numerous results advertising cheap airfares to Guadalajara from many cities in the United States.