PORTLAND, Maine -The Portland International Jetport today announced that Frontier Airlines will start new summer seasonal service to Cincinnati/Northern Kentucky International Airport starting May 21, 2024. The new service will operate three days a week on Tuesdays, Thursdays and Sundays. Last week Frontier Airlines announced the return of Philadelphia service also operating on Tuesdays, Thursdays and Sundays starting May 16, 2024.
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