Am I allowed to go to the airport to catch a flight if I am supposed to self-quarantine in California, United States?

I read on IATA:

Passengers who have been in Austria, Belgium, Brazil, China (People's Rep.), Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Iran, Ireland (Rep.), Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland or United Kingdom (excluding overseas territories outside of Europe) in the past 14 days but are exempt from the restriction to enter the USA, must self-quarantine for 14 days once they reach their final destination.

I am in the United States (California) and must self-quarantine. Am I allowed to go to the airport to catch a flight? I am interested in both domestic and international flights.

• Downvoters: the question is perfectly on-topic and the answer is not straightforward as you can see in the chat and comment. E.g. the March/April 2020 curfew/lockdown of Metro Manila didn't prevent people from going to the airport.
• Close voters: 1) This is a problem I face. 2) I don't wish to disclose the reason for travel and subsequently I am interested to know in the general case, and not for a specific travel reason. 3) Opinion-based close voter: That's a purely factual question right here. Officials typically follow guidelines/regulations.