BOS to SEA Flights: Traverse the Continental US from Boston to Seattle
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$148.4
Last updated Feb 16, 2026
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Tracking the Apr 2, 2026 departure — the cheapest date we found.
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Seattle (SEA)
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Search FlightsSpanning the entire breadth of the United States, the flight from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) represents one of the most significant domestic routes for business and leisure travelers alike. This non-stop journey typically takes around six and a half hours, transporting passengers from the historic, cobblestone streets of New England to the lush, evergreen landscape of the Pacific Northwest. Whether you are heading west to explore the tech hubs of South Lake Union, grab a coffee at the original Starbucks at Pike Place, or simply enjoy the majestic views of Mount Rainier, securing the right flight is the first step toward a seamless cross-country adventure.
Travel Tips
1. Prepare for a time zone shift of three hours; staying hydrated and adjusting your watch to Pacific Time upon boarding can help mitigate the effects of jet lag after landing in Seattle. 2. Since this is a long-haul domestic flight, consider downloading your favorite movies or podcasts ahead of time, as Wi-Fi speeds can vary while crossing the Rocky Mountains. 3. If you are flying during the winter months, be sure to check weather forecasts for both cities, as heavy snow in Boston or significant wind storms in Seattle can occasionally lead to ground delays or gate holds. 4. Pack a light jacket in your carry-on even during the summer, as the temperature difference between the humid Atlantic coast and the cooler, temperate Puget Sound can be surprisingly noticeable upon arrival.
Airport Information
Boston (BOS)
Boston Logan International Airport (BOS) serves as the primary gateway for New England, offering a sophisticated array of four terminals connected by a convenient shuttle system and the Silver Line bus service. Known for its proximity to downtown Boston, Logan provides travelers with premium lounges, diverse dining options featuring local seafood like New England clam chowder, and efficient security checkpoints. It is a major hub for Delta and JetBlue, ensuring frequent daily departures to the West Coast.
Seattle (SEA)
Seattle-Tacoma International Airport (SEA), commonly referred to as Sea-Tac, is the largest airport in the Pacific Northwest and a primary hub for Alaska Airlines and Delta Air Lines. Located about 14 miles south of downtown Seattle, the airport features an impressive central terminal with a massive glass wall overlooking the runways and the Olympic Mountains. Travelers can easily reach the city center via the Link Light Rail, which offers a cost-effective and scenic transit option directly from the airport parking garage.
Seasonal Pricing Patterns
Flight prices for the BOS to SEA route fluctuate significantly based on the time of year and Pacific Northwest weather cycles. Generally, the summer months of June through August are the most expensive due to peak tourism and ideal weather in Washington state. Conversely, travelers can often find the lowest fares during the rainy late autumn or mid-winter months, specifically in January and February, excluding the holiday season. Booking at least six weeks in advance and choosing Tuesday or Wednesday departures is recommended to capture maximum mid-week savings.
Frequently Asked Questions
How long is the flight from Boston to Seattle?
A non-stop flight typically takes between 6 hours and 15 minutes to 6 hours and 45 minutes, covering approximately 2,500 miles across the country.
Which airlines offer direct flights from BOS to SEA?
Major carriers providing non-stop service include Alaska Airlines, Delta Air Lines, and JetBlue, offering several daily frequencies to accommodate different schedules.
What is the best way to get from SEA airport to downtown Seattle?
The Sound Transit Link Light Rail is highly recommended for its efficiency and low cost, though rideshare services, taxis, and airport shuttles are also readily available.
Is there a significant time difference between Boston and Seattle?
Yes, Seattle is in the Pacific Time Zone, which is three hours behind Boston's Eastern Time Zone, so you will 'gain' three hours when flying west.
Are there premium lounges available at BOS for this route?
Yes, Boston Logan offers several premium lounges across all terminals, including the Chase Sapphire Lounge, United Club, and Delta Sky Club, which are accessible to eligible passengers before their long-haul flight.