Cheap flights from Seattle to Boston (SEA - BOS)

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The best prices from Seattle to Boston are usually found in January or February, booked 60 days in advance, depart on a Wednesday or Tuesday 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 2021: compare Seattle to Boston flight prices with the expected peak season, weather and rainfall in Boston.
SEA - BOS
Price
$207 - $448
BOS
Temperature
39.2 - 84.2 °F
BOS
Rainfall
2.8 - 3.9 inches

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

$207

From Seattle to Boston

One-way from

$129

One-way flight from Seattle to Boston

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Seattle to Boston?

Users have found that flying from Seattle to Boston on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Seattle to Boston?

To save on the cost of your flight from Seattle to Boston, book at least 20 days before your planned departure. Booking around this time can save you about 25% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $185 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $243.

What is the cheapest month to fly from Seattle to Boston?

August is one of the best times of the year to fly to Boston from Seattle. Prices for August average $206 per person but you can even find prices for as low as $50. The most expensive prices can be found in the month of December. Opting for a August flight can save you 39% on your journey compared to booking in August

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

One of the essential ways to save on airfare from Seattle to Boston is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 22% on airfare.

Cheap flights from Seattle to Boston in May, June 2021

The best prices found for SEA to BOS flights for May, June
23 May - 25 May
$197pp
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl
23 May - 25 May
$206pp
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
25 May - 8 Jun
$217pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

Seattle to Boston 2021 flight deals

Cheap flights to Boston from Seattle found for this year
23 May - 25 May
$197pp
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl
23 May - 25 May
$206pp
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
17 Aug - 24 Aug
$209pp
SEA
Seattle/Tacoma Intl
Spirit Airlines
 
1 STOP
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Spirit Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl

Non-stop flights to Boston from Seattle

Save time with Seattle to Boston direct flight deals
23 May - 25 May
$197pp
SEA
Seattle/Tacoma Intl
Delta
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl
25 May - 8 Jun
$217pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
9 Jun - 16 Jun
$235pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
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
20 May - 24 May
$217pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
19 May - 24 May
$228pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
19 May - 24 May
$235pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

One-way flights to Boston from Seattle

The cheapest one-way flights from Seattle to Boston
11:28 am - 7:59 pm
Delta
Nonstop
5h 31m
SEA - BOS
Delta
$129
Delta
2:10 pm - 2:44 am
Spirit Airlines
1 Stop
9h 34m
SEA - BOS
Spirit Airlines
$134
Spirit
5:24 pm - 1:44 am
JetBlue
Nonstop
5h 20m
SEA - BOS
JetBlue

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

Are flight prices decreasing from Seattle to Boston due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Seattle and Boston for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Seattle/Tacoma Intl to Boston Logan Intl to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Alaska Airlines is one of them. Some of the new policies that have been implemented to accommodate travelers flying from Seattle/Tacoma Intl to Boston Logan Intl are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

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

Delta, JetBlue, and Alaska Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

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 11 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 13m for a nonstop flight. You can also purchase a plane ticket from 9 airlines when you book a flight from Seattle/Tacoma Intl to Boston.

Can I find flights from Seattle to Boston for under $200 on Cheapflights?

Yes, there are multiple flights from Seattle to Boston for under $200. The cheapest flight booked recently is on Delta for just $197, but on average you can expect to pay $232.

Are there nonstop flights from Seattle to Boston for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Seattle to Boston under $200. A good price for a nonstop flight from Seattle to Boston is less than $246.

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

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

What days are nonstop flights available from Seattle to Boston?

Nonstop flights are available for this route on the following days: Sunday, Wednesday, Saturday.

How popular is this flight route?

Flights from Seattle/Tacoma Intl to Boston Logan Intl have been viewed 143 times in the past calendar month.

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

2 flight departures from Seattle/Tacoma Intl to Boston Logan Intl per day on average.
Afternoon (Noon - 6pm) - 100% of flight departures

Does it rain more in Seattle or Boston?

Expected rainfall in Seattle is more than in Boston. You can expect this to be the case over the next 17 days.

Is Seattle weather warmer or cooler than Boston?

Our data indicates that the weather will be 84 °F on average in the month of July. The temperature in Boston is typically hotter than in Seattle. If you're traveling when the temperature is at its warmest, push to plan early, as flight price and availability will have an impact on your travels. For the best results, search for flights well in advance or after peak season.

How long is the flight from Seattle to Boston?

Alaska Airlines, JetBlue, and Delta can get you from Seattle to Boston in just under 5h 12m. Your travel time will be generally consistent. The distance from Seattle to Boston is about 2502 mi. Generally, flights for this route are nonstop.

What are the cheapest airlines flying from Seattle to Boston round-trip?

According to our current data, Delta ($197), Spirit Airlines ($209), and Alaska Airlines ($217) offers the cheapest pricing from Seattle to Boston. Delta is currently priced 32% below the average price you’ll pay for this route.

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

One-way options have recently been found by users for as low as $99 on Delta. Other airlines that offer cheap prices include Spirit Airlines from $105 and JetBlue from $109 one-way.

Alternative routes for Seattle to Boston

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Boston

Things to know before you go - useful duration and weather info for your trip from Seattle to Boston.
Flight duration
5h 45m
Average temperature for May in Boston
68.0 °F
Avg rainfall for May in Boston
3.7 ″

Airports servicing Seattle

Airports servicing Boston

Top 8 airlines flying from Seattle to Boston

The chart below displays the airlines Cheapflights users traveling 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
Spirit Airlines
$92 $247 No cancel fee 65%
Frontier
$111 $273 No cancel fee 62%
American Airlines
$126 $286 No cancel fee 71%
United Airlines
$122 $290 No cancel fee 69%
Sun Country Air
$132 $294 No cancel fee 83%
Alaska Airlines
$118 $355 No cancel fee 75%
Delta
$118 $357 No cancel fee N/A
JetBlue
$138 $396 No cancel fee 62%

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 42% of SEA to BOS departures
Morning 6 AM to noon 31% of SEA to BOS departures
Afternoon Noon to 6 PM 26% of SEA to BOS departures
Early morning Midnight to 6 AM 1% of SEA to BOS 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
8 daily flights
Monday
13 daily flights
Tuesday
14 daily flights
Wednesday
8 daily flights
Thursday
13 daily flights
Friday
9 daily flights
Saturday
12 daily flights
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