https://www.bcdtravel.com/glossary/airline-tickets/
Airline tickets - Travel Glossary - BCD Travel
Airline tickets are official documents or digital confirmations that grant travelers the right to board a flight with a specific airline.
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https://www.perk.com/corporate-travel-glossary/aviation-regulator/
Aviation Regulator | The Perk Corporate Travel Glossary
An aviation regulator is a government authority that works on a national level to approve and regulate civil aviation. Learn more here.
corporate travel glossaryaviationregulatorperk