Cheap flights from Boston to Seattle from $109

Round-trip
1 adult
Economy
From?
To?
Mon 7/4
Mon 7/11

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Flight information for Boston to Seattle
(BOS to SEA)

Find info about flight duration, direct flights, and airports for your flight from Boston to Seattle

Best Price Found

$109

Fastest flight time

6h 14m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in Seattle

3 airports
The best one-way flight to Seattle from Boston in the past 72 hours is $109. The best round-trip flight deal from Boston to Seattle found on momondo in the last 72 hours is $218.
The fastest flight from Boston to Seattle takes 6h 14m
Direct flights go from Boston to Seattle on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is American Airlines.
There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

How to get the cheapest flight ticket from Boston to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

January

The cheapest time of year to fly to Seattle from Boston is January. Most expensive is June

What is the cheapest day to depart Boston for Seattle?

Friday

The cheapest day of the week is typically Friday. The most expensive is typically Monday

When is the cheapest time to fly from Boston to Seattle?

in the evening

Boston to Seattle flights are approximately 38% more expensive at noon than in the evening

What is the cheapest airline that flies to Seattle from Boston?

Juneyao Airlines

Alaska Airlines, Delta, and Frontier are the most popular carriers operating from Boston to Seattle

What is the cheapest Boston to Seattle flight route?

Boston Logan Intl - Seattle/Tacoma Intl

Fly from Boston Logan Intl to Seattle/Tacoma Intl for the best Boston - Seattle flight prices

How far in advance should you book Boston to Seattle flights?

31 days before

The cheapest time to buy a flight from Boston to Seattle is approximately 31 days to departure

When you’re planning your trip from Boston to Seattle, the most popular airport-to-airport route is Boston Logan Intl Airport to Seattle/Tacoma Intl Airport. You may be looking for an airport near Boston Logan Intl Airport to depart from when traveling to Seattle and Providence-TFGreen Airport, located in Providence is a great option. In June, $218 is typically the cheapest round trip price you’ll find from Boston to Seattle which you can find when you fly BOS — SEA.

Boston Logan Intl Airport (BOS) to Seattle/Tacoma Intl Airport (SEA)$218
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Providence-TFGreen Airport (PVD) to Seattle/Tacoma Intl Airport (SEA)$320
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Easily compare round-trip flights from Boston to Seattle

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Boston to Seattle by changing tabs
Multiple Airlines
Oct 26
BOS3:09 amBoston Logan Intl
6h 36m
SEA9:45 amSeattle/Tacoma Intl
Nov 5
SEA5:50 pmSeattle/Tacoma Intl
5h 13m
BOS11:03 pmBoston Logan Intl
Delta
Oct 26
BOS7:00 amBoston Logan Intl
6h 34m
SEA1:34 pmSeattle/Tacoma Intl
Nov 2
SEA6:20 pmSeattle/Tacoma Intl
5h 19m
BOS11:39 pmBoston Logan Intl
American Airlines
Nov 5
BOS9:10 amBoston Logan Intl
11h 33m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
Nov 5
SEA7:59 pmSeattle/Tacoma Intl
8h 12m
1 stop
BOS3:11 amBoston Logan Intl
United Airlines
Nov 5
BOS4:00 amBoston Logan Intl
10h 10m
1 stop
SEA2:10 pmSeattle/Tacoma Intl
Nov 7
SEA11:44 amSeattle/Tacoma Intl
10h 27m
1 stop
BOS10:11 pmBoston Logan Intl
Alaska Airlines
Oct 27
BOS3:10 amBoston Logan Intl
6h 26m
SEA9:36 amSeattle/Tacoma Intl
Oct 31
SEA5:50 pmSeattle/Tacoma Intl
5h 13m
BOS11:03 pmBoston Logan Intl
JetBlue
Dec 17
BOS2:22 pmBoston Logan Intl
6h 27m
SEA8:49 pmSeattle/Tacoma Intl
Jan 2
SEA6:59 pmSeattle/Tacoma Intl
5h 07m
BOS12:06 amBoston Logan Intl

Find the cheapest one-way flights from Boston to Seattle

If you're looking for one-way flights from Boston to Seattle, view some of our deals below provided by Alaska Airlines, American Airlines and Delta
Delta
Nov 12
BOS2:05 amBoston Logan Intl
6h 40m
SEA8:45 amSeattle/Tacoma Intl
American Airlines
Sep 29
BOS10:51 amBoston Logan Intl
10h 57m
1 stop
SEA9:48 pmSeattle/Tacoma Intl
Alaska Airlines
Sep 20
BOS3:50 pmBoston Logan Intl
6h 20m
SEA10:10 pmSeattle/Tacoma Intl

Search last-minute flights to Seattle from Boston

Find and compare round-trip flight prices for your last-minute flight from Boston to Seattle
Delta
Jul 4
BOS7:00 amBoston Logan Intl
6h 12m
SEA1:12 pmSeattle/Tacoma Intl
Jul 7
SEA3:20 amSeattle/Tacoma Intl
5h 24m
BOS8:44 amBoston Logan Intl
Alaska Airlines
Jul 7
BOS4:00 amBoston Logan Intl
6h 14m
SEA10:14 amSeattle/Tacoma Intl
Jul 13
SEA3:25 amSeattle/Tacoma Intl
5h 27m
BOS8:52 amBoston Logan Intl
Multiple Airlines
Jul 6
BOS2:30 pmBoston Logan Intl
6h 21m
SEA8:51 pmSeattle/Tacoma Intl
Jul 11
SEA6:25 pmSeattle/Tacoma Intl
5h 15m
BOS11:40 pmBoston Logan Intl
United Airlines
Jul 4
BOS2:00 amBoston Logan Intl
12h 57m
1 stop
SEA2:57 pmSeattle/Tacoma Intl
Jul 11
SEA3:00 amSeattle/Tacoma Intl
9h 32m
1 stop
BOS12:32 pmBoston Logan Intl
JetBlue
Jul 5
BOS4:35 amBoston Logan Intl
6h 15m
SEA10:50 amSeattle/Tacoma Intl
Jul 13
SEA9:00 amSeattle/Tacoma Intl
5h 26m
BOS2:26 pmBoston Logan Intl
Delta
Jul 4
BOS4:05 amBoston Logan Intl
7h 43m
1 stop
SEA11:48 amSeattle/Tacoma Intl
Jul 7
SEA3:20 amSeattle/Tacoma Intl
5h 24m
BOS8:44 amBoston Logan Intl

Best airlines flying from Boston to Seattle

Compare and see reviews for airlines that fly from Boston to Seattle with momondo
AirlineRatingFree CancellationPrice
Juneyao AirlinesPriceFrom $11Free CancellationRating
0.0
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Spirit AirlinesPriceFrom $88Free CancellationRating
6.2
6.4

Boarding

5.9

Comfort

7.0

Crew

4.9

Entertainment

5.1

Food

Reviews

If they serve drinks for free

1 / 10
Search Spirit Airlines flights
United AirlinesPriceFrom $108Free CancellationRating
7.2
7.5

Boarding

7.1

Comfort

8.0

Crew

6.9

Entertainment

6.5

Food

Reviews

Flight was on time

1 / 10
Search United Airlines flights
Alaska AirlinesPriceFrom $109Free CancellationRating
7.9
8.2

Boarding

7.9

Comfort

8.5

Crew

7.2

Entertainment

7.1

Food

Reviews

Flight crew was attentive and friendly.

1 / 10
Search Alaska Airlines flights
JetBluePriceFrom $132Free CancellationRating
6.9
7.1

Boarding

7.3

Comfort

7.7

Crew

7.0

Entertainment

6.5

Food

Reviews

On June 18th, I flew from RDU to JFK, NY. The plane was delayed in the runway for 1+ hours. As soon as I got out of the plane, I got a wheelchair (dur to my heart and back pain) and told the agent to go as fast as he can to Turkish airline terminal so we can catch the flight. We arrived at Turkish airline gate and the airplane doors were closed. I asked and almost begged to let us get in, but our request was denied. Therefore, we lost our connecting flight by Turkish airline to Istanbul, Turkey. We still had 20 minutes left from the departure. But Turkish airline said, they close the door 40 minutes before the departure. Around 12:15 AM (now is June 19th), I walked all the way from Turkish airline to JetBlue ticket counter (half an hour walk) and asked for next flight to Istanbul. After waiting for 2+ hours in the line, JetBlue indicated that next day flight to Istanbul is all sold-out and Turkish airline does not have any space from JFK to Istanbul. The agent said, why don’t you get a hotel and come back tomorrow morning and there might be a space for you. She said, most of time, there is a cancellation, and they should be able to accommodate us. Then, we have started to search for near-by hotel and after 2+ hours searching (all near-by hotels were sold-out) around 3:30 AM we found a Comfort-Inn which was 10 miles away. We got Uber and went to that hotel. The guy asked for $230+$50 deposit cash (no credit card) per person for only 6 hours as we had to be out by 12 PM. My son and I got 2 rooms very close to lobby (Room# C15 and C17). Once I got to my room, I saw flies and bugs in the corner of my room. At this time, I thought about getting a rest and try to connect my next flight to Istanbul which was extremely important to me. Once I got into the bed, it was extremely uncomfortable. The bed was uneven and bad. To make the long story short, I only slept one hour (at the most) due to around 6 AM, lots of kids in the lobby were making noise which I could hear them well. They only reimbursed one of the rooms and the other one they charged us as my son had the same problem as me. I did not argue as my goal was to get to JFK airport and get my ticket to Istanbul to see my nephew and his new wife. We came back to JFK airport and again stayed in the line for 2+ hours. Once it was our turn, the JetBlue ticket counter indicated; they don’t have anything from JFK to Istanbul. However, they have a flight from JFK to Boston and from Boston to Istanbul. I said, Let’s get that ticket, immediately The JetBlue agent said, I had to go to Turkish airline “Lost and Found” section to pick up my luggage and hand carry it back to JetBlue from JFK to Boston, then from Boston to Istanbul. This means, I had to go back again all the way to Turkish airline in another Terminal, get my luggage and bring it back to JetBlue. Due to so many people missed their flights, I had to wait for 2+ hours to get my luggage due to “Lost and Found” being so busy with so many lost luggage from other passengers. After 2+ hours, I picked up my luggage and took it all the way back to JetBlue (half an hour walk). I got to JetBlue ticket counter and re-checked my luggage going from JFK to Boston and Boston to Istanbul. I spent 3+ hours walking around and then I went to JetBlue’s gate for departure to Boston at 7:30 PM and then from there depart to Istanbul at 11:30 PM. Around 7:10 PM, the agent announced that, the plane which was supposed to pick us up has not arrived and there will be a delay. I asked the ticket counter agent, how long is the delay and he said, he does not know. Around 8:30 PM, the plane was arrived. The agent told me, by time they board us, it will be 9:00 PM and the soonest we get to Boston, it will be between 10:30 to 10:40 PM which Turkish airline closes the gate for their 11:30 PM departure to Istanbul. So, the agent said, there is no way we could make on-time and I will miss the flight from Boston to Istanbul. I went back to the ticket counter, and they said, they don’t have anything next day (Tuesday June 21st) and asked to stay in the hotel for another night. At this time, I was unbelievably shocked and stunned by JetBlue and how they treated me. Being in JFK airport and that bad hotel for over 30+ hours, not having my medications with me, I was at a point of falling due to being weak of not taking my medicines. I never thought this would happen to me. I decided to go back home to RDU, NC as we have missed my nephew’s wedding on June 19th and also missed the “Ceremony after the Wedding” on June 20th. There was no point for us to go to Istanbul as my nephew and his wife were gone to Honeymoon and all relatives were going back to their countries. We were extremely disappointed as it happened twice and the level of caring we received were extremely low. JetBlue agents did not even care that we lost connecting flights twice. They were all laughing, working very slow, talking personal and eating Pizzas while taking care of JetBlue tense customers. At this point, we decided to go back home to RDU, NC. This was due to being weak and having dizziness. The agent said, they will issue us 2 on way tickets which will be paid for. The plane was supposed to leave JFK towards RDU at 9:55 PM. Guess what, it left the airport at 11:30 PM, and arrives in RDU around 12:45 AM. As soon as I got home, I took my medications, passed out and slept for 11 hours. On Monday I rest all day as my heart and my body were aching. Yesterday, I was in contact with jet Blue (Code share department) as well as Kayak agency and other agencies for hotels and tours which all were cancelled due to JetBlue delays which occurred twice back-to-back on Saturday and Sunday. In summary, I lost my nephew’s wedding who is like a son to me. While I was in airport, we spoke on the phone, after the Wedding and after the ceremony. He said, uncle, without you, this wedding was meaningless to me and my bright. As soon as he said, I cried. It broke my heart and we both cried over the phone. These back-to-back delays happened only because of JetBlue. My nephew and I lost a big one here as I am still at lost and could NOT believe, this happened to me.

1 / 10
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FrontierPriceFrom $138Free CancellationRating
6.2
6.4

Boarding

5.8

Comfort

7.0

Crew

4.7

Entertainment

5.0

Food

Reviews

Newer planes being acquired at least have a small tray for working or reading or to set down a drink. Most seats do not recline, and space is tight. If you are over 6' tall consider paying extra for a seat with extra legroom.

1 / 10
Search Frontier flights
DeltaPriceFrom $148Free CancellationRating
7.8
7.9

Boarding

8.0

Comfort

8.3

Crew

7.7

Entertainment

7.3

Food

Reviews

One of the crew member weren’t to pleasant

1 / 10
Search Delta flights
American AirlinesPriceFrom $164Free CancellationRating
7.1
7.4

Boarding

7.1

Comfort

8.0

Crew

6.8

Entertainment

6.4

Food

Reviews

Smooth flight and boarding process. The food was normal for a 3 hour flight Comfort is okay unless you are in first class.

1 / 10
Search American Airlines flights
Sun Country AirPriceFrom $191Free CancellationRating
7.3
7.6

Boarding

7.4

Comfort

8.1

Crew

6.3

Entertainment

6.4

Food

Reviews

I paid extra to board zone 1 they called zone 1-3 at the same time so that was pointless. Crew was unfriendly and I felt like an inconvenience. Wasn’t able to go to a gate had to take a shuttle to the gate and that process was a mess. I won’t fly sun country again unless it is an emergency.

1 / 10
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Endeavor AirlinesPriceFrom $253Free CancellationRating
0.0
Search Endeavor Airlines flights
  • Alaska Airlines Flights From Boston to Seattle

    Alaska Airlines flies from Boston to Seattle around 12 times per week, with 683 momondo users rating the airline 7.9/10. The cheapest Alaska Airlines deal from Boston to Seattle in the last 72 hours was $109 (round-trip), much lower than the average airfare cost of $309 for Alaska Airlines flights on this route.

  • Delta Flights From Boston to Seattle

    The best Delta deal for Boston to Seattle flight tickets found on momondo in the last 72 hours was $148, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $388 round-trip. Delta operates 17 flights out of Boston into Seattle in an average week, so prices vary by time and availability. 392 Delta reviews by users on momondo have scored the airline at 7.8/10.


American Airlines flights from Boston to Seattle

Our best American Airlines deals on Boston to Seattle flight tickets
American Airlines
Nov 5
BOS9:10 amBoston Logan Intl
11h 33m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
Nov 5
SEA7:59 pmSeattle/Tacoma Intl
8h 12m
1 stop
BOS3:11 amBoston Logan Intl
American Airlines
Sep 29
BOS10:51 amBoston Logan Intl
10h 57m
1 stop
SEA9:48 pmSeattle/Tacoma Intl
Oct 11
SEA8:10 pmSeattle/Tacoma Intl
8h 26m
1 stop
BOS4:36 amBoston Logan Intl
American Airlines
Oct 18
BOS1:31 pmBoston Logan Intl
8h 32m
1 stop
SEA10:03 pmSeattle/Tacoma Intl
Oct 25
SEA7:05 pmSeattle/Tacoma Intl
8h 11m
1 stop
BOS3:16 amBoston Logan Intl

JetBlue flights from Boston to Seattle

Our best JetBlue deals on Boston to Seattle flight tickets
JetBlue
Dec 17
BOS2:22 pmBoston Logan Intl
6h 27m
SEA8:49 pmSeattle/Tacoma Intl
Jan 2
SEA6:59 pmSeattle/Tacoma Intl
5h 07m
BOS12:06 amBoston Logan Intl
JetBlue
Jul 5
BOS4:35 amBoston Logan Intl
6h 15m
SEA10:50 amSeattle/Tacoma Intl
Jul 13
SEA9:00 amSeattle/Tacoma Intl
5h 26m
BOS2:26 pmBoston Logan Intl
JetBlue
Jul 4
BOS4:35 amBoston Logan Intl
6h 15m
SEA10:50 amSeattle/Tacoma Intl
Jul 11
SEA6:53 pmSeattle/Tacoma Intl
5h 14m
BOS12:07 amBoston Logan Intl

  • Are airlines flying from Boston Logan Intl to Seattle/Tacoma Intl offering flexible cancellation due to COVID-19?

    To ease the stress of booking flights, some of our airline partners flying from Boston Logan Intl to Seattle/Tacoma Intl are responding to the global pandemic. The following airlines may have a flexible cancellation policy to help accommodate travelers: Delta, Alaska Airlines, and JetBlue.

  • How far is Boston Logan Intl to Seattle/Tacoma Intl by plane?

    The straight-line distance from Boston Logan Intl to Seattle/Tacoma Intl is 2484.0 mi. Flights usually cover this in 6h 16m, depending on flying conditions and air traffic around both airports.



Alternative routes for Boston to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Boston to Spokane Flights
Fastest flight time6h 57m
Cheapest price$324

Similar Boston to Seattle flights

Flexible with your destination? Broaden your search and find flights similar to your Boston to Seattle route

Why use momondo?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to Seattle. momondo saves you time and could save you money on your trip.

Yes. momondo allows you to filter the results for Boston to Seattle flights to just show those with flexible booking policies.

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Boston.

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Boston and alert you when they change.


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