We could only find 1 airline that flies directly into Twin Falls, Idaho:
Delta Air Lines
There may be other airlines that have added routes, so if you're looking for flights make sure you check the website of each airline.
These are some of the airports that have direct flights arriving at your destination.
Travelmath helps you find airlines that fly to a specific airport in any city, state, or country. You can use these pages to see what airlines might have flights available for your next trip. Sometimes you can get a cheaper flight on a different carrier, but you might not know all the airlines serving your destination. This tool saves you time by doing a search of all airline codes and air line companies so you don't have to go to the website of every single company to check their route maps. Once you have all the airlines in your list, make sure you check the actual flights since there may be recent changes to flight paths or newly added routes. Then start comparing prices to find the best deal from any airline!