Find Cheap Flights from Boston Logan International to Seattle/Tacoma Intl (BOS - SEA)

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Good to Know

Low Season:
February
Best time to beat the crowds
2%
expected price decrease
High Season:
June
Most popular time to fly
14%
expected price increase
Average Price:
$645
(avg. price over the last 2 weeks)
Good Deal:
$442
or less (round trip)

When to Book Flights from Boston Logan International to Seattle/Tacoma Intl

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

The cheapest flight from Boston Logan International to Seattle/Tacoma Intl was found 27 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is February.
Morning departure is around 6% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Boston Logan International to Seattle/Tacoma Intl Flights

How long does a flight from Boston Logan International to Seattle/Tacoma Intl take?
An average nonstop flight takes 6h 04m, covering a distance of 2488 miles.
How many flights are there between Boston Logan International and Seattle/Tacoma Intl?
There are 210 (nonstop) flights between Boston Logan International and Seattle/Tacoma Intl per week, averaging 30 per day.
Which airlines provide the cheapest flights from Boston Logan International to Seattle/Tacoma Intl?
In the past 3 days, the cheapest round-trip tickets were found on Spirit Airlines ($187), JetBlue ($197) and Multiple Airlines ($320).
Do I need a passport to fly between Boston Logan International and Seattle/Tacoma Intl?
No.
Which airlines fly most frequently between Boston Logan International and Seattle/Tacoma Intl?
JetBlue (4 times daily), Alaska Airlines (3 times daily), Delta (3 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Boston Logan International to Seattle/Tacoma Intl?
For Boston Logan International to Seattle/Tacoma Intl, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Seattle/Tacoma Intl back to Boston Logan International, the best deals are generally found on Tuesday, with Sunday being the most expensive.

Book cheap flights from Boston Logan International to Seattle/Tacoma Intl (round-trip)

Airports
Origin
Boston
$187
only
$187
Destination
Seattle
$187
only
$187
Wed, Jan 24
BOS
SEA
10h 42m
Sat, Jan 27
SEA
BOS
11h 29m
Trip: 4 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 52093 reviews
Overall
5.7
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
FLL
DTW
Mediocre 2.0

Nothing

Service, cheap attitude as well as hungry company.

PDX
LAS
Mediocre 2.3

Price

The attenedents the drink cart the boarding my seat

FLL
BDL
Excellent 9.3

Not enough leg room.

FLL
MGA
Okay 4.3

Spirit probably had 6 flights or more going through customs at the same time whjch made for extremely long lines. My 2nd flight was cancelled and i stood in line for 3 1/2 hours to rebook another flight. They should have another process to help out stranded customers. Especially when the flight crew doesnt show up and they cancel a flight.

SAN
BWI
Good 6.6

The plane was brand new and very clean and spacious. The flight was also so cheap. The negatives are that the seats don’t recline, there is no Wi-Fi on the plane or option to even purchase Wi-Fi, there was no entertainment, and because of the low prices, not even the water is complementary. Excellent value

Fri, Feb 2
BOS
SEA
6h 28m
Sun, Feb 4
SEA
BOS
5h 10m
Trip: 3 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 38 reviews
Overall
8.2
Boarding
8.2
Comfort
8.3
Crew
8.6
Entertainment
8.0
Food
7.8
BOS
SEA
Excellent 9.0

Had a hard time logging into free wifi

BOS
SEA
Excellent 8.0

The crew seemed nice and helpful. I appreciate a very decent attempt at free TV and free wifi. The seats are not crazy cramped.

We were delayed (by the weather, I think), and the communication could have been a little clearer about the length of the delay. The snacks were okay, but I'd love something other than processed prepackaged salty or sweet stuff. The screens on the seatback headrests were not all in great shape, and I had some issues with the wifi.

BOS
SEA
Excellent 10.0

The entertainment was perfect. The atmosphere in the cabin was happy and light hearted.

FLL
LGA
Mediocre 3.6

Ive been traveling with jetblue for years, but lately everytime their flights are always delay

BOS
SEA
Excellent 10.0

I love the free wifi and movies

Wish we had more snack service on such a long flight

Tue, Jun 5
BOS
SEA
10h 10m
Tue, Jun 12
SEA
BOS
5h 23m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Jun 1
BOS
SEA
6h 15m
Mon, Jun 4
SEA
BOS
5h 25m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 3 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
LGA
FLL
Excellent 8.0

When the passenger in front reclines their seat it was in my face The legroom wasn’t terrible but I had a hard time even reading since it was so close

ATL
MEX
Excellent 8.3

Tudo conforme esperado em um voo da Delta.

Nada a reclamar.

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

BOS
SEA
Excellent 9.0

Complimentary snack mini-meal. Early departure and arrival. Availability of extra seat and elbow room. Free movies.

Entertainment screen would not tilt to comfortable angle when passenger in front of me reclined his seat, and the screen/system stopped functioning properly near end of flight.

CUN
ATL
Mediocre 3.6

The crew on board were helpful

Delta staff at airport were unprofessional. They had us spend over an hour traveling to a different TSA line because they closed the line we were in. The other line was a 10 minute drive away. Also our bags did not reach philadelphia when we landed at 3 am.

Fri, Feb 9
BOS
SEA
6h 28m
Mon, Feb 12
SEA
BOS
5h 10m
Trip: 4 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 38 reviews
Overall
8.2
Boarding
8.2
Comfort
8.3
Crew
8.6
Entertainment
8.0
Food
7.8
BOS
SEA
Okay 5.0

The A320 seats space and comfort was the worst in my 30+ years of flying. Worst seats ever. Will never fly on one of those jets again.

BOS
SEA
Excellent 10.0

The entertainment was perfect. The atmosphere in the cabin was happy and light hearted.

BOS
SEA
Excellent 10.0

this is the only airline i know of that gives you wifi and TV for free... movies cost extra but after flying ryanair jetblue looks like a company that is willing to do the most they can to make you happy.

cant say that there was anything that i didn't like. oh.... my screen controller stopped working..... so i watched the news on repeat..

BOS
SEA
Excellent 10.0

I love the free wifi and movies

Wish we had more snack service on such a long flight

BOS
SEA
Excellent 9.0

Had a hard time logging into free wifi

Sat, Jun 23
BOS
SEA
20h 41m
Tue, Jul 3
SEA
BOS
11h 50m
Trip: 11 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53853 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
IAD
BRU
Excellent 8.3

Very friendly cabin crew made this trip pleasant and entertaining.

Despite plenty of empty seats, the ground personnel would not consider changing our seat assignment at the gate to allow us to sit together.

IAH
PNS
Mediocre 2.0

delayed in piecemeal by 6 hrs before move to another gate. than mechanical delay and then cancelled. Arrived at hotel after midnight without food or drink. Substitute flight was next day noon - original offer was for late afternoon flight! That flight had poor service. Attendant dawdled so there were no drinks served.

EWR
SJU
Mediocre 2.0

Nothing

Terrible service. Flight delayed (two hours).

SAN
SFO
Excellent 10.0

The flight actually left.

Poor communication. Flight originally at 11:35, then 12:05, then 12:15... At 11:55, they said they would start boarding in 20 min. How can you do that and still take off at 12:15? Answer: you can't. Just be honest and keep us informed. Bonus: United sent me an email saying that connection had already left (it hadn't - thanks United! - awesome service as always!)

IAD
AMS
Mediocre 2.0

I didn't go. It was $400 just to change my name on my ticket from my maiden name to my married name. I am so disappointed and will never use Kayak again!!!

Sat, Jan 27
BOS
SEA
6h 28m
Fri, Feb 2
SEA
BOS
5h 10m
Trip: 7 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 38 reviews
Overall
8.2
Boarding
8.2
Comfort
8.3
Crew
8.6
Entertainment
8.0
Food
7.8
BOS
SEA
Excellent 8.0

The crew seemed nice and helpful. I appreciate a very decent attempt at free TV and free wifi. The seats are not crazy cramped.

We were delayed (by the weather, I think), and the communication could have been a little clearer about the length of the delay. The snacks were okay, but I'd love something other than processed prepackaged salty or sweet stuff. The screens on the seatback headrests were not all in great shape, and I had some issues with the wifi.

BOS
SEA
Excellent 10.0

this is the only airline i know of that gives you wifi and TV for free... movies cost extra but after flying ryanair jetblue looks like a company that is willing to do the most they can to make you happy.

cant say that there was anything that i didn't like. oh.... my screen controller stopped working..... so i watched the news on repeat..

JFK
SFO
Excellent 9.0

On time, very efficient

Checked bag pickup was on the opposite side of the terminal, with inadequate signage.

BOS
SEA
Excellent 8.6

Free wifi and good snacks

BOS
SEA
Excellent 10.0

The entertainment was perfect. The atmosphere in the cabin was happy and light hearted.

Wed, Mar 7
BOS
SEA
6h 26m
Tue, Mar 20
SEA
BOS
5h 15m
Trip: 13 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 38 reviews
Overall
8.2
Boarding
8.2
Comfort
8.3
Crew
8.6
Entertainment
8.0
Food
7.8
BOS
SEA
Good 7.6

People were super nice

I wish there had been power plugs

BOS
SEA
Excellent 9.0

Had a hard time logging into free wifi

BOS
SEA
Excellent 8.0

The crew seemed nice and helpful. I appreciate a very decent attempt at free TV and free wifi. The seats are not crazy cramped.

We were delayed (by the weather, I think), and the communication could have been a little clearer about the length of the delay. The snacks were okay, but I'd love something other than processed prepackaged salty or sweet stuff. The screens on the seatback headrests were not all in great shape, and I had some issues with the wifi.

BOS
SEA
Excellent 10.0

The entertainment was perfect. The atmosphere in the cabin was happy and light hearted.

BOS
SEA
Excellent 10.0

I love the free wifi and movies

Wish we had more snack service on such a long flight

Tue, Apr 3
BOS
SEA
6h 17m
Wed, Apr 11
SEA
BOS
5h 15m
Trip: 9 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 38 reviews
Overall
8.2
Boarding
8.2
Comfort
8.3
Crew
8.6
Entertainment
8.0
Food
7.8
BOS
SEA
Excellent 8.0

The crew seemed nice and helpful. I appreciate a very decent attempt at free TV and free wifi. The seats are not crazy cramped.

We were delayed (by the weather, I think), and the communication could have been a little clearer about the length of the delay. The snacks were okay, but I'd love something other than processed prepackaged salty or sweet stuff. The screens on the seatback headrests were not all in great shape, and I had some issues with the wifi.

BOS
SEA
Good 7.6

People were super nice

I wish there had been power plugs

FLL
LGA
Mediocre 3.6

Ive been traveling with jetblue for years, but lately everytime their flights are always delay

BOS
SEA
Excellent 10.0

The entertainment was perfect. The atmosphere in the cabin was happy and light hearted.

BOS
SEA
Okay 5.6

average trip: boarding, timeliness, uneventful (what you wish for on a flight)

-Entertainment system wasn't working, so made for a long 6 hours. -Flight crew weren't self-aware - had conversations with each other in loud voices at the back of the plane that could be heard by passengers several rows away. Many people were trying to sleep with no entertainment system working.

Sat, May 5
BOS
SEA
6h 22m
Sat, May 12
SEA
BOS
5h 19m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Apr 10
BOS
SEA
6h 17m
Tue, Apr 17
SEA
BOS
5h 18m
Trip: 8 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 38 reviews
Overall
8.2
Boarding
8.2
Comfort
8.3
Crew
8.6
Entertainment
8.0
Food
7.8
FLL
LGA
Mediocre 3.6

Ive been traveling with jetblue for years, but lately everytime their flights are always delay

BOS
SEA
Okay 5.6

average trip: boarding, timeliness, uneventful (what you wish for on a flight)

-Entertainment system wasn't working, so made for a long 6 hours. -Flight crew weren't self-aware - had conversations with each other in loud voices at the back of the plane that could be heard by passengers several rows away. Many people were trying to sleep with no entertainment system working.

BOS
SEA
Excellent 8.0

The crew seemed nice and helpful. I appreciate a very decent attempt at free TV and free wifi. The seats are not crazy cramped.

We were delayed (by the weather, I think), and the communication could have been a little clearer about the length of the delay. The snacks were okay, but I'd love something other than processed prepackaged salty or sweet stuff. The screens on the seatback headrests were not all in great shape, and I had some issues with the wifi.

BOS
SEA
Okay 5.0

The A320 seats space and comfort was the worst in my 30+ years of flying. Worst seats ever. Will never fly on one of those jets again.

JFK
SFO
Excellent 9.0

On time, very efficient

Checked bag pickup was on the opposite side of the terminal, with inadequate signage.

Thu, Jul 5
BOS
SEA
6h 24m
Tue, Jul 10
SEA
BOS
5h 17m
Trip: 6 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 3 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
CUN
ATL
Excellent 9.6

The weather was bad in Atlanta. We were rerouted to Minneapolis and made a connection to Philadelphia. No problems.

ATL
MEX
Excellent 8.3

Tudo conforme esperado em um voo da Delta.

Nada a reclamar.

ATL
HOU
Excellent 10.0

Nice flight and good staff and service

CMH
ATL
Okay 5.0

As poltronas estavam OK.

No voo MEX-GRU o Sistema de Entretenimento nao funcionou por quase 3hs. A refeicao foi muito fraca, tamto no jantar quanto no café da manhã. Onde ja se viu comer feijão preto com onelete no cafe da manhã??? Deveriam pensar no tipo de passageiro q estao atendendo.

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

Wed, Apr 18
BOS
SEA
11h 45m
Sun, Apr 22
SEA
BOS
5h 15m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Tue, May 1
BOS
SEA
6h 17m
Tue, May 8
SEA
BOS
5h 32m
Trip: 8 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 38 reviews
Overall
8.2
Boarding
8.2
Comfort
8.3
Crew
8.6
Entertainment
8.0
Food
7.8
BOS
SEA
Excellent 8.0

The crew seemed nice and helpful. I appreciate a very decent attempt at free TV and free wifi. The seats are not crazy cramped.

We were delayed (by the weather, I think), and the communication could have been a little clearer about the length of the delay. The snacks were okay, but I'd love something other than processed prepackaged salty or sweet stuff. The screens on the seatback headrests were not all in great shape, and I had some issues with the wifi.

BOS
SEA
Excellent 8.6

Free wifi and good snacks

JFK
SFO
Excellent 9.0

On time, very efficient

Checked bag pickup was on the opposite side of the terminal, with inadequate signage.

BOS
SEA
Good 7.6

People were super nice

I wish there had been power plugs

BOS
SEA
Excellent 9.0

Had a hard time logging into free wifi

Thu, Jul 5
BOS
SEA
6h 24m
Mon, Jul 9
SEA
BOS
5h 17m
Trip: 5 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 3 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
BOS
AUS
Good 6.0

Delayed so I was not home until middle of the night.

PDX
JFK
Excellent 8.3

Food

Leg room

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

CUN
ATL
Mediocre 3.6

The crew on board were helpful

Delta staff at airport were unprofessional. They had us spend over an hour traveling to a different TSA line because they closed the line we were in. The other line was a 10 minute drive away. Also our bags did not reach philadelphia when we landed at 3 am.

CUN
ATL
Excellent 9.6

The weather was bad in Atlanta. We were rerouted to Minneapolis and made a connection to Philadelphia. No problems.

Thu, Jun 7
BOS
SEA
6h 04m
Thu, Jun 14
SEA
BOS
12h 34m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jul 10
BOS
SEA
6h 17m
Mon, Jul 23
SEA
BOS
8h 54m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Jul 30
BOS
SEA
10h 44m
Wed, Aug 8
SEA
BOS
5h 23m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Show more results

Boston Logan International to Seattle/Tacoma Intl Flight Information

Avg. Flight Duration 5h 49m
Flights Arrive in Seattle/Tacoma Intl
Flights Depart from Boston Logan International
Flight Price $187
Distance 2488 miles
Airlines Spirit Airlines, JetBlue, Delta, United
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.