Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Whistler to Fanning Field as you normally would.
Yes, there are multiple flights from Whistler to Fanning Field for under C$ 628. The cheapest flight booked recently is on Delta for just C$ 509, but on average you can expect to pay C$ 770.
There are no direct flights from Whistler to Fanning Field, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
The rainfall in Vancouver Intl is generally less than the rainfall in Idaho Falls. This will continue over the next 17 days.
You can imagine temperatures to be in the 33 °C range in July. The weather in Idaho Falls is generally hotter than Vancouver Intl's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.
Airlines like Delta and United Airlines fly from Whistler to Fanning Field in about 4h 38m. The time it takes to get you to your destination can typically vary by up to 13h 20m. This flight may include one or multiple stops.
Delta, at C$ 509, was found to be the cheapest airline from Whistler to Fanning Field. An alternate airline flying to your destination would be United Airlines.