Just noticed this has been inserted into the T&C of the Sun Pass
Peak Travel Period- A Peak Travel Period applies between December 20 to December 23 and January 5 to January 9 inclusive. When a travel date is selected within a Peak Period, a Fare Premium will be charged at time of booking confirmation. The Fare Premium is non-refundable and subject to change at any time.
Each pass type seems to have different prices
Yikes. Luckily I don't usually travel on those exact dates because of how our work schedule is.
Zone - Fare Premium Amounts
Southwestern: $149
Florida: $299
Florida Plus: $299
Hawaii: $299
It's a hefty sum. For example
Southwest Flex (from West Triangle). $149 premium. +$316 per segment normally.
~50% increase in price.
Florida Flex (from East Triangle/YQB). $299 premium. +$606 per segment.
~60% increase.
Florida Flex Plus (from East Triangle/YQB). $299 premium. +$563 per segment.
~53% increase.
Hawaii Flex (from West Triangle). $299 premium. +736 per segment.
~40% increase.