Cheap flights from Seattle to Boston

Round-trip
Economy
Seattle (SEA)
Boston (BOS)
Depart
Return
Any month
Compare vs. Cheapflights |

The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or February, booked 60 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

How to find the cheapest flight from
Seattle (SEA) to Boston (BOS)

All the information you need to plan the best SEA to BOS flight in 2022: compare Seattle to Boston flight prices with the expected peak season, weather and rainfall in Boston.
SEA - BOS
Price
C$ 207 - C$ 448
BOS
Temperature
-1 - 23 °C
BOS
Precipitation
78 - 101 mm

Popular in

December

High demand for flights, 35% potential price rise

Cheapest in

January

Best time to find cheap flights, 29% potential price drop

Round-trip from

C$ 261

From Seattle/Tacoma Intl to Boston Logan Intl

One-way from

C$ 204

One-way flight from Seattle/Tacoma Intl to Boston Logan Intl

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Seattle to Boston?

To save up to 62% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to Boston from C$ 475 1-2 weeks out and tickets from C$ 608 for flights departing within the next 72 hours.

What is the cheapest day to fly round-trip from Seattle to Boston?

Thursday flights are generally found to be more expensive for flights from Seattle to Boston. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Boston.

When is the cheapest time to fly from Seattle to Boston (SEA - BOS)?

A simple way to save on the total cost of your ticket is to fly from Seattle to Boston at noon. If you’re flexible enough to do this you can expect to save up to 43% on your trip compared to booking a flight in the afternoon.

Cheap flights from Seattle to Boston in January, February 2022

The best prices found for SEA to BOS flights for January, February
12 Feb - 13 Feb
C$ 248pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
9 Feb - 12 Feb
C$ 250pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
19 Feb - 25 Feb
C$ 256pp
SEA
Seattle/Tacoma Intl
JetBlue
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
JetBlue
Direct
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Boston 2022 flight deals

Cheap flights to Boston from Seattle found for this year
12 Feb - 13 Feb
C$ 248pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
9 Feb - 12 Feb
C$ 250pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
26 Mar - 27 Mar
C$ 255pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

Direct flights to Boston from Seattle

Save time with Seattle to Boston direct flight deals
12 Feb - 13 Feb
C$ 248pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
9 Feb - 12 Feb
C$ 250pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
26 Mar - 27 Mar
C$ 255pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Direct
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl

Last minute flights from Seattle to Boston

Late deals on round-trip flights to Boston from Seattle, departing today and this week
4 Feb - 9 Feb
C$ 261pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Delta
Direct
SEA
Seattle/Tacoma Intl
2 Feb - 5 Feb
C$ 304pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Direct
SEA
Seattle/Tacoma Intl
2 Feb - 5 Feb
C$ 343pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl

One-way flights to Logan Intl from Seattle

The cheapest one-way flights from Seattle to Boston
7:50 p.m. - 12:08 p.m.
American Airlines
1 stop
13h 18m
SEA - BOS
American Airlines
C$ 204
3:00 a.m. - 11:18 a.m.
Alaska Airlines
Direct
5h 18m
SEA - BOS
Alaska Airlines
C$ 213
6:55 p.m. - 11:54 a.m.
Multiple Airlines
2 stops
37h 59m
SEA - BOS
Multiple Airlines
C$ 226
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Seattle</span> to <span class="emphasized">Boston</span> flights.

Flight FAQs

From Seattle to Boston

What airports do I use to fly from Seattle to Boston?

Booking a flight from Seattle/Tacoma Intl (SEA) to Boston Logan Intl (BOS) is your only option if you wish to fly from Seattle to Boston. On a typical day, there are 8 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 19m for a nonstop flight. You can also purchase a plane ticket from 4 airlines when you book a flight from Seattle/Tacoma Intl to Boston.

Which airlines flying from Seattle/Tacoma Intl to Boston Logan Intl have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Seattle/Tacoma Intl to Boston Logan Intl that may be offering flexible cancellation policies are JetBlue, Alaska Airlines, and Delta. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Are there direct flights from Seattle to Boston for under C$ 300 on Cheapflights?

Cheapflights has 20 direct flights from Seattle to Boston under C$ 300. A good price for a direct flight from Seattle to Boston is less than C$ 299.

Are there last-minute flights available from Seattle to Boston for under C$ 300?

There are currently 20+ open flights from Seattle to Boston within the next 7 days for less than C$ 300.

What days are direct flights available from Seattle to Boston?

You can find direct flights on the following days: Sunday, Wednesday, Thursday, Friday, Saturday.

How popular is this Seattle to Boston flight route?

The Seattle/Tacoma Intl to Boston Logan Intl flight path was viewed by 28 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How many flights depart from Seattle to Boston on average per day?

13 flight departures from Seattle to Boston per day on average.
Morning (6am - Midday) - 85% of flight departures
Afternoon (Noon - 6pm) - 15% of flight departures

What are the cheapest airlines to fly from Seattle to Boston one-way?

The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as C$ 108. However, be on the lookout for offers from Delta and American Airlines, as they are both options that can get you from Seattle to Boston for a low price.

What are the most popular airlines that fly from Seattle to Boston?

The most popular airlines flying from Seattle to Boston are American Airlines, Alaska Airlines and JetBlue. Something to consider prior to booking your flight.

What are the cheapest flights from Seattle to Boston?

While on average a flight from Seattle to Boston is generally C$ 122, our data shows the cheapest flight currently is C$ 122. When looking at the most popular route, (Seattle/Tacoma Intl - Boston Logan Intl), you can expect to pay C$ 322 for that flight.

What are the most reliable airlines from Seattle to Boston?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Boston on time: Qatar Airways (89%), Delta (76%), Japan Airlines (75%).

COVID Restrictions

View COVID Travel Restrictions for Boston, MA

Do I need a COVID test to fly to Boston from Seattle?

Information is based on travel restrictions for travel to Boston Logan Intl within the United States

Most visitors from Seattle/Tacoma Intl need to provide a negative COVID-19 test result and/or quarantine to enter Boston Logan Intl.

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Boston Logan Intl.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Boston Logan Intl.

Do I need a test to fly back to Seattle from Boston?

Returning to Seattle/Tacoma Intl from Boston Logan Intl

COVID-19 testing requirements
Visitors from Boston Logan Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Boston Logan Intl are not required to quarantine after entering Seattle/Tacoma Intl.

Hide COVID Travel Restrictions for Boston, MA

Destination information for Boston

Things to know before you go - useful duration and weather info for your trip from Seattle to Boston.
Average temperature for January in Boston
4.0 °C
Avg rainfall for January in Boston
85.0 mm

Airports servicing Seattle

Airports servicing Boston

Top 4 airlines flying from Seattle/Tacoma Intl to Boston Logan Intl

The chart below displays the airlines Cheapflights users travelling from Seattle to Boston choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
American Airlines
C$ 148 C$ 302 No cancel fee 71%
Search American Airlines flights
Alaska Airlines
C$ 149 C$ 364 No cancel fee 75%
Search Alaska Airlines flights
Delta
C$ 149 C$ 286 No cancel fee N/A
Search Delta flights
JetBlue
C$ 197 C$ 493 No cancel fee 62%
Search JetBlue flights

Hourly flight availability from Seattle to Boston

See what time of day planes typically take off from Seattle towards Boston.
Evening 6 PM to midnight 43% of flight departures
Morning 6 AM to noon 41% of flight departures
Afternoon Noon to 6 PM 15% of flight departures
Early morning Midnight to 6 AM 1% of flight departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Seattle to Boston
See how many times per day planes take to the skies headed from Seattle to Boston.
Sunday
11 daily flights
Monday
14 daily flights
Tuesday
11 daily flights
Wednesday
6 daily flights
Thursday
9 daily flights
Friday
6 daily flights
Saturday
5 daily flights
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