Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Portsmouth, New Hampshire as you normally would.
To save on the cost of your flight from Denver to Portsmouth, New Hampshire, book at least 31 days before your planned departure. Booking around this time can save you about 18% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $282 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $307.
Flights from Denver to Portsmouth, New Hampshire lean towards being more expensive in December. Prices are generally better when you fly from Denver to Portsmouth, New Hampshire in September, with the cheapest ticket starting at $131.