Seattle to Boston Flights (SEA to BOS): Your Guide to Coast-to-Coast Travel

Since the flight from SEA to BOS is approximately five and a half hours long and crosses three time zones, try to book a red-eye flight if you want to maximize your first day in Boston; however, ensure you stay hydrated and use a neck pillow to mitigate the effects of the significant eastward time jump. Take advantage of the robust Alaska Airlines and Delta hubs in Seattle, as they offer the most frequent non-stop service, providing you with more flexibility in your departure times and better chances for complimentary upgrades if you hold elite status. Upon arrival at Logan International, skip the expensive rideshare lines and utilize the Silver Line T service, which is free from the airport to South Station, offering a seamless and cost-effective connection to the heart of the city’s transit network. Given the unpredictable weather in both the Pacific Northwest and New England, always pack versatile layers in your carry-on, as you might leave a rainy, mild Seattle morning only to land in a brisk, windy Boston afternoon.

Flight prices for the SEA to BOS route typically peak during the summer months of June through August and around the December holiday season when demand for New England vacations and family visits is at its highest. Conversely, the most budget-friendly fares are usually found during the late winter months of January and February, or the 'shoulder seasons' of early spring and late autumn. Booking at least six to eight weeks in advance is recommended to secure the best rates, especially if you plan to visit during the spectacular fall foliage season in October.