To save up to 51% on this flight, we recommend booking at least 8 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to Cambridge from $666 1-2 weeks out and tickets from $1,099 for flights departing within the next 72 hours.
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, November can be a great choice for travel to Cambridge. Flights to Cambridge from Seattle in November are about $859 on average during November, but can be found for as low as $560.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Cambridge as you normally would.
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