Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Boston to Seattle
The cheapest flights right now
Boston – Seattle
Outbound – Nov 7, 2026
direct
6h 24m Return – Nov 14, 2026
direct
5h 20m $459
2 days ago
Boston – Seattle
Outbound – Dec 5, 2026
direct
6h 38m Return – Dec 12, 2026
direct
5h 19m $458
2 days ago
Boston – Seattle
Outbound – Dec 4, 2026
direct
6h 37m Return – Dec 11, 2026
direct
5h 19m $456
2 days ago
Boston – Seattle
Outbound – Dec 5, 2026
direct
6h 38m Return – Dec 11, 2026
direct
5h 19m $455
2 days ago
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$309
Average price of a round trip
$388
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
6h15
A flight from Boston to Seattle takes on average 6h15.
Best time
February
According to user searches, the ideal month to go to Seattle is February.
The best flight deals for a week
Boston – Seattle
Outbound – Nov 7, 2026
direct
6h 24m Return – Nov 14, 2026
direct
5h 20m $459
2 days ago
Boston – Seattle
Outbound – Dec 5, 2026
direct
6h 38m Return – Dec 12, 2026
direct
5h 19m $458
2 days ago
Boston – Seattle
Outbound – Dec 4, 2026
direct
6h 37m Return – Dec 11, 2026
direct
5h 19m $456
2 days ago
Boston – Seattle
Outbound – Dec 5, 2026
direct
6h 38m Return – Dec 11, 2026
direct
5h 19m $455
2 days ago
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Tips for finding a cheap flight from Boston to Seattle
Check out our tips for booking your flight to Seattle (USA) from Boston (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is August, with an average flight ticket price of $168 (calculation over the last two years). The most touristic season corresponds to the months of October, July and September.
For the cheapest flights, it is advisable to buy your ticket at least 23 days before the departure date.
The airline offering the cheapest flight tickets is JetBlue. A ticket from the airline JetBlue to Seattle costs on average $358.
The airlines that offer the most flights are Alaska Airlines, JetBlue and Alaska Airlines.
Price of flight tickets from Boston to Seattle
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $309 to $754
- The average price of a flight ticket is about $388
- Prices are lowest for stays in the month of August
- The month in which booking a ticket is cheaper is: October
info departure city :
Boston, USA
airport :
Boston-Logan International Airport (BOS)
local time :
Boston is a city in the country USA, the time zone is [[timezone]]. In Boston, it is currently {fromLocalTime}, the temperature is on average 15°C, with a minimum of 10°C and a maximum of 19°C.
The city of Boston has 1 airport(s): Boston-Logan
destination info :
Seattle, USA
airports :
Kenmore Air Harbor Spb. (LKE)
Seattle-Tacoma International Airport (SEA)
Renton Municipal Airport (RNT)
King County International Airport (BFI)
local time :
Seattle is in the country USA, the time zone is [[timezone]]. In Seattle, it is currently {toLocalTime}, the temperature is on average 17°C, with a minimum of 11°C and a maximum of 24°C.
The city of Seattle (SEA) has 4 airport(s): Kenmore Air Harbor Spb., Seattle-Tacoma, Renton and King County
Useful info about Seattle
What is the least touristic period to go to Seattle?
If you want to visit Seattle during the least touristic period, choose the month of February.
What is the most popular time to travel to Seattle?
In Seattle, the most popular month is October. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Boston to Seattle?
According to our data, it is recommended to book your flight 23 days before your departure. If you book your flight ticket 4 weeks before your departure, you may find a price below average. You can also choose morning flights that are 100% cheaper than afternoon and evening flights. The cheapest day to book a flight from Boston to Seattle is Sunday.
What are the arrival and destination airports when traveling between Boston and Seattle?
When you leave, you can leave from Boston-Logan, and you will arrive at Seattle-Tacoma.
How to reach Boston airport from the city centre?
This information is not available at this time.
Are there other means of transportation to go from Boston to Seattle?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Boston and Seattle?
In summer, the average temperature is 18°C in Seattle and 22°C in Boston. The average rainfall in summer is 38 mm in Seattle and 106 mm in Boston. In summer, it is warmer in Boston and it rains less in Seattle. In winter, it is colder in Seattle and it rains more in Seattle.
