Finding out the airport you're waiting at has free Wi-fi is one of the best feelings in the world. Unfortunately, it also means you're vulnerable to being hacked.

The cybersecurity company Coronet recently undertook a study to examine how dangerous it is to sign in to public wi-fi networks in America's airports. Apparently public wi-fi networks, particularly airports, are one of the biggest targets for hackers to get into a person's device, steal their passwords and access their various information. 

Coronet went to the 45 busiest airports in America at the beginning of 2018 and examined how vulnerable their public wi-fi networks are. Here were the top 10 worst airports on a threat level scale of 0 to 10.

1. San Diego International Airport in San Diego, California – Threat score: 10

2. John Wayne Airport in Santa Ana, California – Threat score: 8.7

3. William P. Hobby Airport in Houston, Texas – Threat score: 7.5 

4. Southwest Florida International Airport in Fort Myers, Florida – Threat score: 7.1

5. Newark Liberty International Airpot in Newark, New Jersey – Threat score: 7.1

6. Dallas Love Field in Dallas, Texas – Threat score: 6.8

7. Phoenix Sky Harbor International Airport in Phoenix, Arizona – Threat score: 6.5

8. Charlotte Douglas International Airport in Charlotte, North Carolina – Threat Score: 6.4

9. Detroit Metropolitan Wayne County Airport in Detroit, Michigan – Threat score: 6.4

10. General Edward Lawrence Logan International Airpot in Boston, Massachusetts – Threat score: 6.4

Just because your local airpot isn't appearing on this list doesn't mean it's necessarily safe. Coronet says that the best way to avoid getting your personal information stolen if you are hacked at a public wi-fi is to make sure your passwords aren't easy to guess, such as your birthday or your child's name. 

Or better yet, don't log in to public wi-fi networks!

(h/t CNBC)