Travelers have found it’s best to book a flight 21 days in advance to save up to 42% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 21 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Montana to South Dakota 1-2 weeks in advance for as low as $224, or $312 for flights within the next 24 hours.
Flights from Montana to South Dakota lean towards being more expensive in October. Prices are generally better when you fly from Montana to South Dakota in July, with the cheapest ticket starting at $107.