$131 Cheap Flights from Boston (BOS) to Seattle (SEA)

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Flight deals we found

These prices are lower than our typical predictions for similar flights.
70% less than typical
$327
Roundtrip per traveler
Fri, Sep 13 - Mon, Sep 16
Alaska AirlinesAlaska Airlines
6h 14m
7:59pm
11:13pm
BOS
Nonstop
SEA
Found 20 hours ago
60% less than typical
$461
Roundtrip per traveler
Sat, May 18 - Sat, May 18
JetBlue AirwaysJetBlue Airways
6h 11m
5:40pm
8:51pm
BOS
Nonstop
SEA
Found 20 hours ago
50% less than typical
$585
Roundtrip per traveler
Fri, Jun 21 - Sat, Jun 22
DeltaDelta
6h 17m
6:55pm
10:12pm
BOS
Nonstop
SEA
Found 20 hours ago
40% less than typical
$346
Roundtrip per traveler
Fri, May 17 - Sun, May 26
Alaska AirlinesAlaska Airlines
6h 9m
7:59pm
11:08pm
BOS
Nonstop
SEA
Found 9 hours ago
40% less than typical
$346
Roundtrip per traveler
Fri, May 17 - Fri, May 31
Alaska AirlinesAlaska Airlines
6h 9m
7:59pm
11:08pm
BOS
Nonstop
SEA
Found 22 hours ago
35% less than typical
$335
Roundtrip per traveler
Tue, May 21 - Sun, May 26
JetBlue AirwaysJetBlue Airways
6h 5m
4:25pm
7:30pm
BOS
Nonstop
SEA
Found 18 hours ago
30% less than typical
$395
Roundtrip per traveler
Thu, May 23 - Mon, May 27
JetBlue AirwaysJetBlue Airways
6h 5m
4:25pm
7:30pm
BOS
Nonstop
SEA
Found 6 hours ago
30% less than typical
$386
Roundtrip per traveler
Thu, Aug 29 - Sun, Sep 1
Alaska AirlinesAlaska Airlines
6h 14m
7:59pm
11:13pm
BOS
Nonstop
SEA
Found 16 hours ago
25% less than typical
$397
Roundtrip per traveler
Thu, May 16 - Mon, May 20
Alaska AirlinesAlaska Airlines
6h 9m
7:59pm
11:08pm
BOS
Nonstop
SEA
Found 1 hour ago
30% less than typical
$326
Roundtrip per traveler
Tue, May 7 - Tue, May 14
JetBlue AirwaysJetBlue Airways
6h 5m
4:25pm
7:30pm
BOS
Nonstop
SEA
Found 15 hours ago
25% less than typical
$377
Roundtrip per traveler
Thu, Aug 29 - Mon, Sep 2
Alaska AirlinesAlaska Airlines
6h 14m
7:59pm
11:13pm
BOS
Nonstop
SEA
Found 14 hours ago
20% less than typical
$444
Roundtrip per traveler
Sat, Jun 29 - Fri, Jul 5
Alaska AirlinesAlaska Airlines
6h 23m
7:59pm
11:22pm
BOS
Nonstop
SEA
Found 10 hours ago
75% less than typical
$264
Roundtrip per traveler
Fri, Sep 13 - Mon, Sep 16
American AirlinesAmerican Airlines
10h 9m
4:50pm
11:59pm
BOS
1 stop • 1h 29m in PHX
SEA
Found 20 hours ago
75% less than typical
$262
Roundtrip per traveler
Tue, Aug 6 - Tue, Aug 13
American AirlinesAmerican Airlines
9h 37m
5:57am
12:34pm
BOS
1 stop • 1h 15m in CLT
SEA
Found 7 hours ago
75% less than typical
$264
Roundtrip per traveler
Tue, May 14 - Tue, May 21
American AirlinesAmerican Airlines
11h 2m
3:57pm
11:59pm
BOS
1 stop • 2h 31m in DFW
SEA
Found 15 hours ago

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Cheap Flights from Boston to Seattle (BOS-SEA)

Prices were available within the past 7 days and start at $131 for one-way flights and $212 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
American Airlines
Spirit Airlines
Delta
JetBlue Airways
Delta
United
United
American Airlines
Spirit Airlines
Flights from Boston (BOS) to Seattle (SEA)
Origin airport
Logan Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Spirit Airlines, Sun Country Airlines, United
Roundtrip price
$211
Distance
2487 mi
Average flight time
3 hours 15 mins

Boston to Seattle Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Boston to Seattle offer the perfect respite. Not only does exploring Seattle provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from Boston to Seattle may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from BOS to SEA today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Seattle are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Seattle more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is $131 now!

Frequently asked questions

How much is a one-way flight from BOS to Sea-Tac Airport?
You can score one-way Boston flights to Seattle starting from just $104. This data is based on the best fare found on Expedia for this route with a departure date in the next three months and was last updated on May 1 2024 and has not changed since. This specific airfare is for an Spirit Airlines service, heading off from Logan Intl. Airport on May 17 2024 and touching down at Seattle - Tacoma Intl. Airport (SEA).
How long does it take to fly from BOS to Sea-Tac Airport?
Book your trip with Alaska Airlines and you can expect to be cruising the skies for approximately 6 hours and 12 minutes. This top carrier has a direct flight that leaves at 9:30AM from BOS and lands at Seattle - Tacoma Intl. Airport (SEA) at 12:42PM. Expedia has some incredible flight deals, so check out what’s on offer on this route today.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) last minute?
When it comes to booking your flights, being prepared pays off. While you may be able to find a deal on a Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) flight at the last minute, tickets usually don’t get cheaper as the departure date nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to book a domestic flight is between 28 – 35 days ahead. For international travel it’s between three and four months.
What is the cheapest airline flying from BOS to SEA in the next 90 days?
Based on airfares found on Expedia with a departure date within the next 90 days, Spirit Airlines is the cheapest airline flying from Boston to Seattle. The fare for this journey starts at $104. This flight leaves Logan Intl. Airport (BOS) on May 17 2024 and touches down at SEA. The price was last updated on May 1 2024 and has not changed since.
What's the cheapest price for a flight from BOS to SEA next month?
The lowest price for a one-way flight from Boston to Seattle over the next month is $104. If you want to travel soon, lock in this fare before it’s gone. This ticket price was found after looking through all available flights on Expedia with a departure date within the next 30 days. This fare is for a one-way Spirit Airlines flight leaving BOS on May 17 2024 and getting into SEA. Pricing info was updated on May 1 2024 and has not changed since.
What airline has the least delays from Logan Intl. Airport (BOS) to Sea-Tac Airport?
With an on-time arrival score of 90%, Delta Air Lines is the carrier that’s most likely to fly you from Logan Intl. Airport to Seattle - Tacoma Intl. Airport (SEA) without any travel delays. Flight delays aren’t just an unpleasant experience — they can also lead you to missing a connection or even ruin your vacation. Keep updated about any delays by checking your flight status through the free Expedia App before you head for the airport. If you’re already at your gate and the delay is significant, head to the customer service desk to work out your next move.
Can I find cheap nonstop flights from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) in the next three months?
The lowest price we can find for a roundtrip nonstop flight from Boston to Seattle in the next 90 days is $311. This amount is based on all available flights on Expedia with a departure date in the next three months. This airfare is for a flight via Alaska Airlines leaving from Logan Intl. Airport on May 26 2024 and landing at Sea-Tac Airport, with a return journey on June 2 2024. This price was updated on May 1 2024.You can easily source nonstop cheap flights from Logan Intl. Airport to Sea-Tac Airport by using our filters. Start by typing in details of your journey, then press on “Nonstop” under “Filter by” to the left of the page. Your results will be arranged with the lowest fare first. If you don’t have to fly on a specific day, make use of our handy “Flexible dates” feature. This lets you compare prices on surrounding days and snag the best possible deal.
What airports do you fly into for Seattle from Boston?
Seattle - Tacoma Intl. Airport (SEA), Renton Municipal Airport (RNT) and Boeing Field Airport (BFI) are your choices when flying from Boston to Seattle. Around 12 mi south of the center of Seattle, Seattle - Tacoma Intl. Airport (SEA) is the city’s main gateway. Keep in mind factors such as flight arrival and departure times and the distance to your hotel before settling on an airport. Space Needle and Pike Place Market are a couple of top attractions to check out when you arrive.
What are the most popular departure times for flights from Logan Intl. Airport (BOS) to SEA?
For Delta Air Lines flights heading from BOS to Sea-Tac Airport, the busiest period is between 6:00 AM - 7:00 AM. If you want to avoid delays, fly out in the morning. This way you’re more likely to escape the air traffic that builds up later in the day.
Can I change the date of my flight from BOS to Sea-Tac Airport?
It’s so easy to make amendments to your Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) trip yourself. Just go to the Expedia Trips portal and click on “change flight.” Look around for new flights and choose the one that fits your plans. You’ll see an estimate of your flight change cost, if applicable. Alternatively, visit our Customer Service portal to chat to our Virtual Agent and get answers to all your questions.
Seattle nearby Airports

Seattle Paine Field Intl. Airport

Boston nearby Airports
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