Direct (non-stop) flights from Boston (BOS) to SeaTac (SEA)
Find comprehensive flight information, schedules, and booking details for direct flights from Boston (BOS), US to SeaTac (SEA), US. This popular route is operated by 2 airlines, offering multiple daily departures.• Flight Duration: 6h 08m - 6h 40m (average flight time)• Distance: 2502 miles (4026 km) (air miles between airports)• Daily Flights: 4-6 flights (scheduled departures per day)
Boston (BOS)
US
SeaTac (SEA)
US
FLIGHT TIME
6h 08m - 6h 40m
FLIGHT DISTANCE
2502 miles (4026 km)
6h 24m - 6h 31m
07:11
19:00
2502 miles (4026 km)
March
2 (Show)
51
Terminal A (Boston (BOS))
Terminal 1 (SeaTac (SEA))
Flight Schedule
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Airlines Operating This Route
Alaska Airlines (AS), Delta Air Lines (DL)
Click any airline to view their specific flight schedules, policies, and route details for this connection. You can also explore flights from Boston (BOS) and flights to SeaTac (SEA).
Route Insights
Route Demand
This route sees high demand with 51 weekly flights, making it one of the busiest connections between Boston (BOS) and Seattle (SEA).
Route Importance
Multiple airlines compete on this route (2 carriers), indicating its significance in connecting Boston (BOS) and Seattle (SEA). This competition often leads to competitive pricing and multiple daily departure options.
Best Time to Fly
Best Value Period
March typically offers the best value for travelers, with lower average fares compared to peak travel periods.
Price Trends
Price variation throughout the year is significant, with Mar being the most affordable month and prices increasing during peak travel seasons.
Distance & Duration Explained
Route Distance
At 2502 miles (4026 km), this is an ultra-long-haul route between Boston (BOS) and Seattle (SEA), requiring larger aircraft and extended flight times.
Flight Duration
Flight duration averages 6h 08m - 6h 40m, with actual times ranging from 6h 24m - 6h 31m depending on aircraft type, wind conditions, and routing.
Airline Comparison
Available Airlines
Travelers have 2 airline options on this route: Alaska Airlines, Delta Air Lines. Each airline offers different schedules, pricing, and service levels to meet various travel needs.
Flight Frequency
Alaska Airlines operates the most flights on this route with 3 daily departures, followed by Delta Air Lines.
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Best Time to Visit & Travel Planning
Cheapest Day
Cheapest Month
Average Fare
$297
Travel Planning Tips for Boston (BOS) to SeaTac (SEA)
- Best Day to Book
Wednesday typically offers the lowest fares for flights from Boston (BOS) to SeaTac (SEA). Consider booking on this day for potential savings.
- Best Month to Travel
January is generally the cheapest month to fly from Boston (BOS) to SeaTac (SEA). Plan your trip during this month for the best deals.
- Average Flight Price
The average fare for flights from Boston (BOS) to SeaTac (SEA) is approximately $297. Prices may vary based on booking time, season, and airline.
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Related Pages
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Frequently Asked Questions
How many flights operate from Boston (BOS) to Seattle (SEA)?
There are 6 direct flights operating from Boston (BOS) to Seattle (SEA). Approximately 4-6 flights daily.
Which airlines operate flights from Boston (BOS) to Seattle (SEA)?
2 airlines operate on this route: Alaska Airlines, Delta Air Lines.
How long is the flight from Boston (BOS) to Seattle (SEA)?
The flight duration from Boston (BOS) to Seattle (SEA) is approximately 6h 08m - 6h 40m.
What is the distance from Boston (BOS) to Seattle (SEA)?
The distance from Boston (BOS) to Seattle (SEA) is 2502 miles (4026 km).
What is the flight time range for this route?
Flight times on this route range from 6h 24m - 6h 31m.
What are the earliest and latest flight departure times?
The earliest flight departs at 07:11 and the latest flight departs at 19:00.
What is the cheapest month to fly from Boston (BOS) to Seattle (SEA)?
March is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 51 flights operate per week from Boston (BOS) to Seattle (SEA).
What types of aircraft operate on this route?
This route is served by Boeing 737-900 (winglets) Passenger/BBJ3, Airbus A321neo, Boeing 737MAX 9 Passenger.
What is the average flight price from Boston (BOS) to Seattle (SEA)?
The average flight price for a round-trip ticket from Boston (BOS) to Seattle (SEA) is approximately $370 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from Boston (BOS) to Seattle (SEA) for the lowest prices?
March is typically the cheapest month to fly from Boston (BOS) to Seattle (SEA). Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from Boston (BOS) to Seattle (SEA)?
2 airlines offer direct flights from Boston (BOS) to Seattle (SEA), providing travelers with multiple options for scheduling and pricing.
How far is Seattle (SEA) from Boston (BOS)?
The distance from Boston (BOS) to Seattle (SEA) is 2502 miles (4026 km). This is a long-haul flight route.
How long does it take to fly from Boston (BOS) to Seattle (SEA)?
The flight time from Boston (BOS) to Seattle (SEA) is approximately 6h 08m - 6h 40m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.
What city does Seattle (SEA) serve?
Seattle (SEA) serves Seattle, US.