What type of identification is required for domestic flights on Frontier Airlines?

For domestic flights on Frontier Airlines, a government-issued photo ID is the required form of identification. This is a standard protocol similar to other airlines and aligns with TSA (Transportation Security Administration) regulations for air travel within the United States. Acceptable forms of a government-issued photo ID include a driver's license, a state-issued ID, or a passport.

Other identification options, such as student IDs and military IDs, are typically not acceptable for boarding unless they are specifically recognized as valid forms of ID by the TSA. A birth certificate, while useful for identifying a minor passenger, does not meet the TSA guidelines for adult travelers and is not considered a valid form of identification for the purpose of boarding a flight.