This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
6 Oct — 13 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in March or October, booked 64 days in advance, depart on a Wednesday or Tuesday and return on a Monday
Cheap flight deals from Boston to Seattle
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
Cheapest flights from Boston to Seattle
Explore the most affordable flight options available from Boston to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 September 2026.
Tue 27/1013:29 -
1 stop8h 34m
Sat 31/1009:05 -
1 stop9h 19m
Deal found 3/9£234
Fri 30/1007:51 -
1 stop15h 35m
Fri 30/1023:00 -
Nonstop5h 26m
Deal found 5/9£234
Thu 5/1109:45 -
1 stop9h 42m
Tue 17/1105:05 -
1 stop7h 30m
Deal found 3/9£237
Tue 27/1014:50 -
2 stops10h 50m
Sat 31/1006:15 -
1 stop7h 50m
Deal found 3/9£241
Tue 6/1007:03 -
Nonstop6h 17m
Tue 6/1011:31 -
1 stop14h 50m
Deal found 4/9£242
Tue 29/907:45 -
1 stop9h 37m
Tue 29/923:14 -
1 stop8h 18m
Deal found 3/9£243
Sat 26/905:00 -
2 stops11h 10m
Tue 29/908:30 -
1 stop13h 00m
Deal found 3/9£246
Sat 26/919:20 -
Nonstop6h 17m
Wed 30/923:42 -
Nonstop5h 24m
Deal found 2/9£246
Sat 26/919:20 -
Nonstop6h 17m
Sat 3/1023:42 -
Nonstop5h 24m
Deal found 2/9£247
Thu 24/915:55 -
1 stop11h 00m
Sat 26/909:15 -
1 stop12h 15m
Deal found 3/9£249
Best flights from Boston to Seattle
Discover carefully curated flight deals from Boston to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 September 2026.
Tue 10/1113:10 -
2 stops12h 20m
Fri 13/1113:55 -
1 stop8h 15m
Deal found 3/9£253
Thu 10/1217:45 -
1 stop24h 09m
Mon 14/1217:59 -
1 stop20h 31m
Deal found 5/9£276
Thu 1/1012:45 -
1 stop9h 07m
Sun 4/1023:13 -
1 stop7h 20m
Deal found 1/9£291
Thu 24/1218:15 -
Nonstop6h 27m
Wed 30/1223:15 -
Nonstop5h 22m
Deal found 3/9£316
Tue 20/1014:50 -
2 stops12h 05m
Mon 26/1000:10 -
2 stops11h 45m
Deal found 5/9£269
Sat 26/917:42 -
1 stop7h 57m
Sat 3/1008:49 -
1 stop17h 32m
Deal found 4/9£311
Sat 17/1005:35 -
2 stops11h 20m
Sat 24/1006:15 -
2 stops11h 20m
Deal found 2/9£289
Thu 24/907:01 -
2 stops16h 36m
Wed 30/923:14 -
2 stops10h 29m
Deal found 3/9£326
Mon 2/1107:55 -
Nonstop6h 25m
Fri 6/1113:40 -
Nonstop5h 30m
Deal found 4/9£331
Wed 18/1107:13 -
Nonstop6h 26m
Wed 2/1208:21 -
Nonstop5h 25m
Deal found 4/9£316
Thu 11/218:30 -
Nonstop6h 34m
Sun 21/222:00 -
Nonstop5h 33m
Deal found 1/9£331
Mon 16/1118:09 -
1 stop30h 20m
Sat 21/1123:22 -
Nonstop5h 18m
Deal found 1/9£317
Direct flights from Boston to Seattle
Explore direct flight options from Boston to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 6 September 2026.
Sat 17/1019:20 -
Nonstop6h 22m
Sat 24/1023:53 -
Nonstop5h 21m
Deal found 2/9£246
Sat 26/919:20 -
Nonstop6h 17m
Wed 30/923:42 -
Nonstop5h 24m
Deal found 1/9£246
Sat 26/919:20 -
Nonstop6h 17m
Sat 3/1023:42 -
Nonstop5h 24m
Deal found 2/9£247
Tue 29/919:20 -
Nonstop6h 17m
Fri 16/1023:55 -
Nonstop5h 21m
Deal found 2/9£255
Mon 28/919:20 -
Nonstop6h 17m
Fri 16/1023:55 -
Nonstop5h 21m
Deal found 2/9£264
Sat 26/919:20 -
Nonstop6h 17m
Sun 27/923:42 -
Nonstop5h 24m
Deal found 4/9£266
Fri 9/1019:20 -
Nonstop6h 22m
Thu 15/1023:55 -
Nonstop5h 21m
Deal found 2/9£275
Tue 20/1019:20 -
Nonstop6h 22m
Tue 27/1009:03 -
Nonstop5h 32m
Deal found 5/9£281
Fri 25/919:20 -
Nonstop6h 17m
Mon 28/923:42 -
Nonstop5h 24m
Deal found 4/9£286
Mon 12/1019:20 -
Nonstop6h 22m
Tue 13/1023:55 -
Nonstop5h 21m
Deal found 2/9£292
Tue 22/919:20 -
Nonstop6h 17m
Tue 29/923:42 -
Nonstop5h 24m
Deal found 4/9£303
Last-minute flights from Boston to Seattle
Discover last-minute flight deals from Boston to Seattle. Data last updated 6 September 2026 and is based on user searches.
Thu 24/915:55 -
1 stop11h 00m
Sat 26/909:15 -
1 stop12h 15m
Deal found 3/9£249
Sat 26/907:45 -
1 stop9h 37m
Tue 29/907:00 -
1 stop7h 37m
Deal found 3/9£237
Sat 26/905:00 -
2 stops11h 10m
Tue 29/908:30 -
1 stop13h 00m
Deal found 3/9£246
Sat 26/919:20 -
Nonstop6h 17m
Wed 30/923:42 -
Nonstop5h 24m
Deal found 2/9£246
Sat 26/919:20 -
Nonstop6h 17m
Sat 3/1023:42 -
Nonstop5h 24m
Deal found 2/9£247
Tue 29/907:45 -
1 stop9h 37m
Tue 29/923:14 -
1 stop8h 18m
Deal found 3/9£243
Tue 6/1007:03 -
Nonstop6h 17m
Tue 6/1011:31 -
1 stop14h 50m
Deal found 4/9£242
Tue 27/1013:29 -
1 stop8h 34m
Sat 31/1009:05 -
1 stop9h 19m
Deal found 3/9£234
Tue 27/1014:50 -
2 stops10h 50m
Sat 31/1006:15 -
1 stop7h 50m
Deal found 3/9£241
Fri 30/1007:51 -
1 stop15h 35m
Fri 30/1023:00 -
Nonstop5h 26m
Deal found 5/9£234
One-way flights from Boston to Seattle
Search for one-way flight options from Boston to Seattle. Find affordable one-way fares based on user searches. Data last updated 6 September 2026.
Wed 2/1207:10 -
1 stop8h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£131
Thu 24/906:00 -
1 stop9h 23m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£132
Sat 26/905:30 -
2 stops10h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£135
Tue 3/1116:33 -
1 stop9h 27m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/9£136
Fri 25/917:01 -
1 stop8h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£140
Thu 1/1012:55 -
2 stops14h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£141
Thu 24/911:15 -
2 stops14h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 1/9£144
Fri 16/1017:01 -
1 stop8h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/9£146
Mon 12/1006:00 -
1 stop8h 39m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£148
Mon 23/1114:25 -
2 stops13h 05m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£149
Fri 6/1116:33 -
1 stop9h 27m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£151
Find flight deals from Boston to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 6 September 2026.
Customise your flight search to find flights from Boston to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 6 September 2026.
Use the filters below to find and compare flights from Boston to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Mon 23/11
06:00-12:19
1 stop9h 19m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£132
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Wed 4/11
07:03-16:56
1 stop12h 53m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£136
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Mon 23/11
14:25-00:30
2 stops13h 05m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£136
Fastest return journey
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Fri 26/2
09:00-12:22
Nonstop6h 22m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£158
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Tue 8/12
07:08-10:30
Nonstop6h 22m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£158
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Fri 13/11
07:13-10:39
Nonstop6h 26m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£158
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Thu 1/10
12:55-00:35
2 stops14h 40m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£159
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Fri 4/12
14:35-22:30
2 stops10h 55m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£161
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Tue 1/12
15:30-23:30
2 stops11h 00m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£161
BostonSeattle
BOS Boston Logan Intl - SEA Seattle/Tacoma Intl
BOSSEA
Boston Logan Intl
Thu 4/3
17:06-23:00
1 stop8h 54m
Seattle/Tacoma Intl
Wed 31/12
00:00-03:00
Nonstop0h 00m
£165
Flights are sorted by cheapest return flights first.
Deals found on 1/9
Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3
Best time to book a flight from Boston to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Boston with our price prediction graph.
BOS-SEA
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Boston to Seattle
Prices
Airlines
Delays
How far ahead should I book a flight from Boston to Seattle?
The best time to book flights from Boston to Seattle is 33 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Boston to Seattle?
Currently, March is the cheapest month in which you can book a flight from Boston to Seattle (average of £262). Flying from Boston to Seattle in December is currently the most expensive (average of £388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from BOS to SEA?
Find hourly flight availability from Boston to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 September 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to Seattle as you normally would.
How much does it cost for a return flight from Boston to Seattle?
Airfare is below average for this route at the moment.
Boston to Seattle flights typically cost between £238 and £376 in October.The cheapest return price found within the last 5 days was £234 on United Airlines (27 Oct–31 Oct).
Weekly flight availability from Boston to Seattle
Explore weekly flight availability from Boston to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 6 September 2026.
The most flights from BOS to SEA are scheduled on a Friday (37 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (3 on average).
How often are flights from Boston to Seattle delayed?
About 17% of weekly flights between Boston and Seattle have experienced delays in the past year, with the average delay time being 164 minutes.
What is the most punctual flight time for Boston to Seattle flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Wednesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Boston to Seattle flights?
Over the past year, JetBlue have had the lowest number of delays on this route, with just 15% of flights being delayed.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 6 September 2026.
Get a feel of what it's like to fly with JetBlue from Boston to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Flight was delayed an hour due to a flight plan issue. Then additional fuel was needed. The crew did communicate well. Upon departure there was not food available for purchase, at least not by the time they got to row 23. Wifi didn't work consistently. Not the normal Jetblue experience. The Captain and crew were great though.
Flight was delayed an hour due to a flight plan issue. Then additional fuel was needed. The crew did communicate well. Upon departure there was not food available for purchase, at least not by the time they got to row 23. Wifi didn't work consistently. Not the normal Jetblue experience. The Captain and crew were great though.
Related info for your journey
Find useful and relevant information for your journey from Boston to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
How popular is this Boston to Seattle flight route?
The Boston Logan Intl to Seattle/Tacoma Intl flight path was viewed by 3 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from Boston to Seattle?
Airlines like Southwest and Alaska Airlines fly from Boston to Seattle in about 12h 05m. The time it takes to get you to your destination can typically vary by up to 12h 04m. The distance between Boston and Seattle is about 2487 mi. Both multi-stop and direct flights can be found to your destination and back.
What is the cheapest airline to fly from Boston to Seattle round-trip?
Currently priced at £226, JetBlue will fly you from Boston to Seattle and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. JetBlue is priced at 27% lower than the current average price of a flight leaving 3 months from now.
What are the most reliable airlines from Boston to Seattle?
Consider LATAM Airlines (91%), Korean Air (80%) or EL AL (79%) when booking your flight. These represent the most reliable airlines when flying from Boston to Seattle.
Can I find deals for flights from Boston to Seattle that include hotel bookings?
Yes. In addition to deals on Boston to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Boston to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Seattle.
Can I find deals for business class flights from Boston to Seattle?
Yes. Cheapflights offers flight deals from Boston to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Boston to Seattle?
Currently, March is the cheapest month in which you can book a flight from Boston to Seattle (average of £262). Flying from Boston to Seattle in December is currently the most expensive (average of £388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 6 September 2026.
Discover the top airline that operate flights from Boston to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 6 September 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Boston to Seattle?
When you search for this flight from Boston to Seattle, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Boston to Seattle?
Millions of users choose and trust Cheapflights to book the best flight deals from Boston to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Boston to Seattle with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Boston to Seattle, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Boston to Seattle become cheaper?
Of course! You can now track prices for flights from Boston to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.