This article explains three easy ways to track flights on your iPhone. You can use two of the iPhone's built-in features, the Messages app or Spotlight. You can also look into a third-party flight tracker with additional features.
How to Track a Flight on Your iPhone | Track Flight iMessage ✈️
Sharing your flight number with someone via text message is a quick and easy way to track your flight. You can use Messages to check the status of a flight, whether you are the one sending or receiving the message.
Open the conversation in Messages with the flight details or enter the airline and flight number if you're the one sending the text message.
The message should include the name of the airline and the flight number or the exact flight number to get the most accurate results. For example, you could enter "Spirit Airlines 927" or "NK927" for the same flight.