Travelers have found it’s best to book a flight 61 days in advance to save up to 44% 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 61 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 Portland to Cambridge 1-2 weeks in advance for as low as $910, or $1,146 for flights within the next 24 hours.
Due to multiple factors, expect to potentially pay more when booking in July. For low rates, October can be a great choice for travel to Cambridge. Flights to Cambridge from Portland in October are about $714 on average during October, but can be found for as low as $445.