Find flights
Deals
Insights
When to book
FAQs & Tips
Direct Flights
Airlines

BOS - SEA

Find cheap flights from Boston to Seattle

1 adult
0 bags
Tue 4/6
Tue 11/6

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Seattle, as well as popular online travel agencies
In the last 7 days, travellers have searched 42,830,901 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights from Boston to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Boston to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boston to Seattle?

The average price of all flights from Boston to Seattle clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Seattle on a Monday and more expensive on a Thursday. On your return trip to Boston, you should consider flying back on a Sunday, and avoid Saturdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boston to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Boston to Seattle is January, where tickets cost C$ 326 on average. On the other hand, the most expensive months are June and August, where the average cost of tickets is C$ 668 and C$ 668 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Boston to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Boston to Seattle, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 36 days before departure.

Which airlines fly most frequently between Boston and Seattle?

Alaska Airlines (5 flights per day), Delta (3 flights per day), and JetBlue (one flight per day) are the most frequent flyers of this route.

Which airlines fly direct between Boston and Seattle?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Boston to Seattle.
There are 3 airlines that fly direct from Boston to Seattle. They are: Alaska Airlines, Delta and JetBlue. The cheapest price of all airlines flying this route was found with Alaska Airlines at C$ 256. On average, the best prices for this route can be found at Delta.

How many flights are there between Boston and Seattle per day?

Each day, there are between 8 and 14 nonstop flights that take off from Boston and land in Seattle, with an average flight time of 6h 13m. The most common departure time is 11:00 a.m. and most flights take off in the morning. Each week, there are 69 flights. The most frequent day of departure is Monday, when 20% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Boston and Seattle?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 2 cabin class options for the route. These are Business and Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

What’s the earliest departure time from Boston to Seattle?

Early birds can take the earliest flight from Boston at 6:30 am and will be landing in Seattle at 9:47 am.

What’s the latest departure time from Boston to Seattle?

If you prefer to fly at night, the latest flight from Boston to Seattle jets off at 7:59 pm and lands at 11:08 pm.

Good to know

Low season

January

High season

August
Best time to beat the crowds (34% less expensive on average)
Most popular time to fly (36% more expensive on average)

When to book flights from Boston to Seattle

Are your dates flexible? Find out the best times to travel from Boston to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to Seattle

  • Are there lounges at SEA?

    Multiple airlines run several lounges at Seattle-Tacoma International Airport (SEA). They include The American Express Centurion Lounge and the United Club. Travelers flying aboard Alaska Airlines should know that the airline operates three lounges at this facility. There’s one at Concourse C, adjacent to gate C16A, Concourse D, near gate D1, and the North Satellite Terminal, close to gate N2.

  • Which airline has its hub at SEA?

    Passengers flying aboard Delta Airlines should remember that the carrier has its hub at Seattle-Tacoma International Airport (SEA), and you'll arrive through the main terminal, Concourse A. You'll enjoy the two Delta Sky Clubs located in Concourse A, near gate A, and South Satellite Terminal, near gate S9. Also, you'll receive priority clearance under the fast lane program.

  • Are there lactating rooms at SEA?

    Seattle-Tacoma International Airport (SEA) features suites that cater to the needs of moms. Located in Concourse D on the lower level of D Annex, these rooms provide privacy as you pump and breastfeed the little ones. Other amenities in these rooms include sinks, comfy chairs, and electrical sockets.

  • Can I leave my luggage at Seattle-Tacoma International Airport (SEA)?

    Passengers arriving at SEA from BOS who feel that they want to leave excess baggage behind, you’ll get storage facilities between baggage carousels 12 & 13. The facility lockers operate between 5:30 am until 12:30 am.

  • Are there onsite hotels at Seattle-Tacoma International Airport?

    While there are no hotels located onsite at Seattle-Tacoma International Airport, there is a cluster of hotels just shy of a mile away from the airport’s terminals. Hilton Seattle Airport & Conference Center, Crowne Plaza Seattle Airport, and Seattle Airport Marriott all are within a mile of the airport and offer free airport pickup and drop-off.

  • Can I fly from Boston to Seattle non-stop?

    Alaska Airlines, jetBlue Airways, and Delta Air Lines all offer nonstop flights from Boston to Seattle. One-stop flights are also common between the two cities, with flights offered by airlines such as United Airlines, Delta Air Lines, and American Airlines. Common layover cities for such flights include Washington D.C., Detroit, and Philadelphia.

  • What is the quickest way from Seattle-Tacoma International Airport to downtown Seattle?

    If you are not renting or driving a vehicle, Link Light Rail is the quickest way to get from the airport to downtown Seattle. Link Light Rail trains connect Seattle-Tacoma International Airport directly to downtown Seattle, and they even run all the way north up to the University of Washington. The airport’s Link station is found on the fourth floor of the adjacent parking garage.

  • What facilities are available for children in Seattle-Tacoma International Airport and Boston Logan International Airport?

    Seattle-Tacoma International Airport and Boston Logan International Airport both have children’s play areas available. Seattle-Tacoma International Airport’s children’s play area, the Playroom, is located across from the Seattle Tap Room by the A gates in the Central Terminal. Boston Logan International Airport’s three children’s play areas are located by Gate 18 in Terminal A, Gate 30 in Terminal B, and Gate 25 in Terminal C.

  • Which airlines offer Wi-Fi service onboard planes from Boston to Seattle?

    All the following airlines offer inflight Wi-Fi service on the Boston to Seattle flight route: JetBlue, Alaska Airlines, Delta, Hawaiian Airlines, Aeromexico, American Airlines, and Qatar Airways.

  • Which aircraft models fly most regularly from Boston to Seattle?

    The Airbus A321neo is the aircraft model that flies most regularly on the Boston to Seattle flight route.

  • Which airline alliances offer flights from Boston to Seattle?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Boston and Seattle, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Boston to Seattle?

    There are direct flights from Boston to Seattle on a daily basis.

  • How does KAYAK find such low prices on flights from Boston to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Boston with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Boston to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 298 or less one-way and C$ 388 or less round-trip.
  • As the busiest airport in Boston, Boston Logan International Airport (BOS) features high-tech innovations and modern infrastructure. This makes it the airport of choice among most airlines, partly the reason why it’s ranked among the 20 busiest airports in the US. Domestic departures and arrivals are through terminals, A, B, and C, while E is reserved for international flights. You can easily connect the terminals via walkways. Also, a shuttle operates between these terminals every 5-15min.
  • Boston Logan International Airport (BOS) in collaboration with Transportation Security Administration (TSA) runs a Cares program that ensures that disabled passengers and travelers with mobility limitations receive assistance. You’ll get dedicated staff to guide you through the security checkpoints and when enplaning. To take advantage of these services, endeavor to contact your airline about 72h before departure.
  • For the prayerful travelers who need a quiet escape to have a moment with the Almighty before the flight, BOS has a chapel at your disposal. You can locate this religious sanctuary in Terminal C before security, on the Arrivals Level. The oasis conducts frequent interfaith prayers to the interest travelers, whether departing or arriving.
  • In case you’re feeling fatigued ahead of your trip BOS to Seattle-Tacoma International Airport (SEA), locate Xpress Spa in Terminal B, close to the American Airlines counter, or Jet Setter Mini Spa and Classique Nail Salon in Terminal C. Services at these outlets such as facials and deep tissue massage provide the much-needed calmness and relaxation before you take off.
  • If your wallet is depleted and you need to recharge it before leaving Boston Logan International Airport (BOS) for Seattle-Tacoma International Airport (SEA), you won’t have a shortage of options to choose from. Those departing through Terminal A will find various ATMs before security.
  • Looking for a family-friendly diversion during your time at Boston Logan International Airport? A good option for art-loving families is Logan International’s Airport Public Art Program. The program features a variety of temporary exhibits that aim to enliven the airport’s environment while simultaneously educating the public.
  • For travelers flying with their four-legged companions on their flights from Boston to Seattle, you will be happy to hear that both airports have pet relief areas available. Boston Logan International Airport’s pet relief areas are located by the Arrivals area outside of the terminals as well as in Terminal E. In Seattle-Tacoma International Airport there are five pet relief areas: two outside of Baggage Claim and the three others by the N, S, and B Gates.
  • Boston Logan International Airport has plenty to offer in terms of dining that offers a bit of local flare. The Harpoon Tap Room, for instance, is a branch of Boston’s Harpoon Brewery and serves a variety of local brews along with a variety of barroom classics. Another local option is Dine Boston. Dine Boston offers a seasonal menu that is updated regularly by guest chefs from the Boston gastronomical scene.
  • For travelers picking up a rental car upon arriving at Seattle-Tacoma International Airport, the airport’s rental car facilities are found in a separate building that is accessible by 24/7 shuttle buses. The shuttle buses pick up from outside of Baggage Claim on both the north and south side of the terminal.
  • Traveling from the suburbs to Boston Logan International Airport? One easy option is to hop on the Logan Express instead of renting a car. The Logan Express features stops in many of Boston’s suburbs such as Framingham, Back Bay, and Woburn.
See more tips

Prefer to fly non-stop from Boston to Seattle?

Find which airlines fly direct from Logan Intl to Seattle/Tacoma Intl, which days they fly and book direct flights.

Nonstop departures

Boston Logan Intl to Seattle/Tacoma Intl

Monday

Aer Lingus, Air France, Air Tahiti Nui, +17 more

Aer Lingus, Air France, +18 more

Tuesday

Aer Lingus, Air France, Air Tahiti Nui, +14 more

Aer Lingus, Air France, +15 more

Wednesday

Aer Lingus, Air France, Air Tahiti Nui, +16 more

Aer Lingus, Air France, +17 more

Thursday

Aer Lingus, Air France, Air Tahiti Nui, +16 more

Aer Lingus, Air France, +17 more

Friday

Aer Lingus, Air France, Air Tahiti Nui, +15 more

Aer Lingus, Air France, +16 more

Saturday

Aer Lingus, Air France, Air Tahiti Nui, +16 more

Aer Lingus, Air France, +17 more

Sunday

Aer Lingus, Air France, Air Tahiti Nui, +15 more

Aer Lingus, Air France, +16 more

See more nonstop flights

Nonstop returns

Seattle/Tacoma Intl to Boston Logan Intl

Monday

Air France, Air Tahiti Nui, Alaska Airlines, +13 more

Air France, Air Tahiti Nui, +14 more

Tuesday

Air France, Air Tahiti Nui, Alaska Airlines, +15 more

Air France, Air Tahiti Nui, +16 more

Wednesday

Air France, Air Tahiti Nui, Alaska Airlines, +13 more

Air France, Air Tahiti Nui, +14 more

Thursday

Air France, Air Tahiti Nui, Alaska Airlines, +15 more

Air France, Air Tahiti Nui, +16 more

Friday

Air France, Air Tahiti Nui, Alaska Airlines, +13 more

Air France, Air Tahiti Nui, +14 more

Saturday

Aer Lingus, Air France, Air Tahiti Nui, +16 more

Aer Lingus, Air France, +17 more

Sunday

Air France, Air Tahiti Nui, Alaska Airlines, +14 more

Air France, Air Tahiti Nui, +15 more

See more nonstop flights
See more nonstop flights

Top airlines flying from Boston to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Boston to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9134 reviews
8.2Boarding
7.3Entertainment
8.6Crew
7.3Food
7.9Comfort
Airline reviews

First time flying with Alaska and the staff were All professional from checkin to departure! I do plan to book more flights with Alaska. Thanks

10.0 ExcellentAdrienne, May 2024CMH - SEA
Read more about Alaska Airlines reviews

First time flying with Alaska and the staff were All professional from checkin to departure! I do plan to book more flights with Alaska. Thanks

Boarded the plain and had to wait 1 hour for crew Captain to arrive from another flight

Overall good flight, smooth and on time and comfortable. Disappointing that food is not served and you can't purchase the snack packs on the plane.

There was a row with three women who were very loud - talking and laughing. In an open, outdoor setting that's fine. On an airplane, no. The flight attendants told the women they were the fun row. It took the woman sitting in the row ahead of the loud women to tell them they were too loud, but everyone in the general vicinity was irritated. I didn't think it would be possible to be so rowdy for so long. Then when we landed we weren't let off at a gate. We had to be bussed in and the bus contended with airline traffic. After dealing with the loud passengers, this was not what I was expecting. An incredibly disappointing experience with an airline that I have always regarded as one of the better ones.

They oversold my flight by 9 seats so when I went to check in I was not assigned a seat and the only one available if I didn’t want to chance it were 100 dollars more

Was not happy that we had to wait an additional 50 minutes for passengers that were still in TSA. This delay made us miss our connecting flight in Seattle to get home to tuck in our two little toddlers. We ran off the plane and ran across the entire airport trying to make this flight only to get to the gate to see that they have ended boarding. So they were willing to wait for passengers in Hawaii but not Seattle?? Especially when this wasn't even our fault. I expect to receive miles for missing our flight and spending an additional 4 hours in Seattle.

Better organizing of entry and exit onto the plane regarding all of the baggage people haul on. There should be a better system so those with no baggage can get in and out more quickly. The baggage haul-on situation is absurd.

It was a great experience, although our seat was taken and we did not want to be rude and ask the person to move. Flight Attendants need to make sure that people should be in their assign sitting that are paid for. Other then that, we had a great flying experience with Alaska Airlines.

Too many people with oversized carry-ons. Uncomfortable seats. flight was too crowded.

Assigned last seat in row Did not recline at all Alaska Air seemed to have more leg room than my last few flights on United Yay!

Delta is one of the best airlines I have flown

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

I appreciated being upgraded. I was very disappointed with my 13 hr layover in Seattle to geg, while my friends who flew Alaska made it home as scheduled. I had to reserve a hotel on my dime.

Delta needs to step up the meals and snacks. They have been serving the same two meals for three years.... It is time to change it up.

Book cheap flights from Boston to Seattle

One-way flight deals

directAmerican Airlines
6h 15mBOS-SEA
directCondor
6h 15mBOS-SEA
directKLM
6h 23mBOS-SEA
directQatar Airways
6h 14mBOS-SEA
directJapan Airlines
6h 15mBOS-SEA
directAer Lingus
6h 20mBOS-SEA
directAir France
6h 23mBOS-SEA
directDelta
6h 17mBOS-SEA
directChina Eastern
6h 17mBOS-SEA
directHainan Airlines
5h 50mBOS-SEA
directEL AL
6h 15mBOS-SEA
directAlaska Airlines
6h 15mBOS-SEA
directJetBlue
6h 13mBOS-SEA
directEtihad Airways
6h 20mBOS-SEA
directLATAM Airlines
6h 18mBOS-SEA
directFinnair
6h 14mBOS-SEA
directHawaiian Airlines
6h 13mBOS-SEA
directKorean Air
6h 17mBOS-SEA
directAir Tahiti Nui
6h 15mBOS-SEA
directTAP AIR PORTUGAL
6h 13mBOS-SEA
directVirgin Atlantic
6h 17mBOS-SEA
directSingapore Airlines
6h 23mBOS-SEA

Search by stops

Search by airline

Boston - Seattle Flights

Departure:

Boston (BOS)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Boston

Cabin classes:

C$ 1,839
C$ 278

Browse origins:

  • Flights » 
  • Boston

Browse destinations:

  • Flights » 
  • Worldwide » 
  • Seattle