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https://www.devex.com/people/does-frontier-charge-for-infants-under-2-2382621
https://www.devex.com/people/can-i-pre-book-a-bassinet-on-frontier-flights-2382629
https://www.devex.com/people/can-i-add-an-infant-to-frontier-economy-booking-via-ota-2382662
https://www.devex.com/people/can-i-add-an-infant-to-my-westjet-airlines-first-class-booking-2382995