Antonyms for the phrase "crash landing" would be a "smooth landing" or a "soft landing." These terms indicate that the landing was successful and without incident. The opposite of a crash landing would also be a "controlled landing" or an "emergency landing." These situations involve pilots or crews taking steps to prevent a catastrophe from happening. A crash landing can cause severe damage to the aircraft and put the passengers and crew at extreme risk. On the other hand, a controlled or emergency landing is a necessary precautionary measure taken to ensure the safety of everyone involved in the flight. Such a landing requires skill, precision, and quick thinking, all of which can be developed through training and experience.