Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Baltimore to Whitehorse as you normally would.
Due to the rapidly changing circumstances due to COVID-19, airlines like Air Canada flying from Baltimore/Washington to Whitehorse have implemented new flexible change policies.
Yes, there are multiple flights from Baltimore to Whitehorse for under $2,800. The cheapest flight booked recently is on Air Canada for just $2,711, but on average you can expect to pay $2,711.
The cheapest flight price from Baltimore to Whitehorse is $844. On average you can expect to pay $844. The most popular route, (Baltimore/Washington - Whitehorse), can usually be booked for $888.