Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Niagara-on-the-Lake to Juneau as you normally would.
Located just 10.8 km from the city centre, Juneau Intl is the airport most travellers will use when flying to Juneau from Niagara-on-the-Lake. Booking flights from Niagara-on-the-Lake to Juneau Intl (JNU) should be relatively easy as there are 0 daily inbound flights from Niagara-on-the-Lake from 0 different airlines.
YYZ stands for Toronto Pearson Intl Airport, while JNU stands for Juneau Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Toronto Island Airport (YTZ), Hamilton Airport (YHM), Toronto Kitchener-Waterloo Airport (YKF) are some additional IATA codes for airports related to your trip.