Airlines that offer flights to Grand Junction Airport (GJT) include Delta Connection, United Express, Allegiant Air, American Eagle and Denver Air Connection, which Key Lime Air operates. grand junction regional airport connecting eastern utah and western colorado to the world. Grand Junction Regional Airport is three miles (4. Skyscanner allows you to find the cheapest flights to Grand Junction (from hundreds of airlines including Delta, American Airlines, United) without having to. Which airlines fly to Grand Junction?,Average price of a round-trip: $391,Good deal for a round-trip: $84,Low season: January. Need to fly from Grand Junction Regional Airport? Travelocity offers great flights deals from GJT starting at just $74.