Boston (BOS) → Seattle (SEA)
About Boston to Seattle Flights
Discover the best flights from Boston to Seattle, covering 4,005 km in approximately 5h 30m. Boston (BOS) to Seattle (SEA) is one of the popular medium-haul routes within United States. With 3 major airlines operating this route including direct flights, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Boston to Seattle.
12-Month Price History
Flight prices from Boston to Seattle vary significantly throughout the year. February typically offers the best deals with average prices around $578, while July sees the highest prices, averaging $971. Savvy travelers can save up to 40% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
44 days
For best prices
Booking Tips
For the best prices on Boston to Seattle flights, we recommend booking 68 days in advance. Domestic flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
JetBlue Airways B6 | $840 | $2040 | - |
Delta Air Lines DL | $880 | $3820 | $5290 |
Alaska Airlines AS | $1070 | $3330 | $4580 |
JetBlue Airways
B6
Economy
$840
Business
$2040
First
-
Delta Air Lines
DL
Economy
$880
Business
$3820
First
$5290
Alaska Airlines
AS
Economy
$1070
Business
$3330
First
$4580
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Hartford → Seattle
Bradley International (BDL) to Seattle-Tacoma International (SEA)
Distance: 3,902 km
Average price: $685
Portland → Seattle
Portland International Jetport (PWM) to Seattle-Tacoma International (SEA)
Distance: 3,995 km
Average price: $699
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Frequently Asked Questions
How long is the flight from Boston to Seattle?
The flight time from Boston (BOS) to Seattle (SEA) is approximately 5 hours and 30 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Boston and Seattle?
The aerial distance between Boston and Seattle is 4,005 kilometers (2,489 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Boston to Seattle?
Several airlines operate flights between Boston and Seattle, including Delta Air Lines, Alaska Airlines, JetBlue Airways. Direct flights are available on this route.
What is the cheapest month to fly from Boston to Seattle?
Based on historical data, February typically offers the lowest airfares for flights from Boston to Seattle. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Seattle?
For the best prices on Boston to Seattle flights, we recommend booking 33 days in advance. Domestic flights can sometimes offer good last-minute deals, but advance booking is usually cheaper.
Do I need a visa to travel from Boston to Seattle?
Visa requirements depend on your nationality and the purpose of your visit. Since this is a domestic flight, no visa is required for citizens.
What is the time difference between Boston and Seattle?
Boston operates on America/New_York time zone, while Seattle is in the America/Los_Angeles time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.