Boston to Seattle
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BOS–SEA
Distance
4016 KM
Flight Time
6H 05M
Weekly Flights
50+
Fares From
$79
Carriers
DL · AS · B6 · UA
Cheap Flights from Boston to Seattle — Compare Our Best Deals
With 50+ nonstop weekly departures, Boston to Seattle is one of the longer nonstop domestic routes in the country, linking two major tech and biotech hubs. Browse one-way fares from $79, round-trip fares from $139, and compare Delta and Alaska’s schedules against JetBlue and United.
BOS Boston ✈ SEA Seattle
One Way
$79
per person, incl. taxes · nonstop · Delta, Alaska, JetBlue, United
BOS Boston ✈ SEA Seattle
Round Trip
$139
per person, incl. taxes · nonstop · Delta, Alaska, JetBlue, United
Airlines with Flights from Boston to Seattle
BOS–SEA is flown nonstop by four carriers, with Alaska anchoring the route from its Seattle hub alongside Delta, JetBlue, and United.
| Airline | Base / Hub | Weekly Departures | Flight Time | Code |
|---|---|---|---|---|
| Alaska Airlines | Seattle (SEA) hub | ~18 nonstop | 6h 00m – 6h 15m | AS |
| Delta Air Lines | Multi-hub network | ~16 nonstop | 6h 05m | DL |
| JetBlue Airways | Boston (BOS) focus city | ~10 nonstop | 6h 10m | B6 |
| United Airlines | Multi-hub network | ~8 nonstop | 6h 05m | UA |
Cheap Flights from Boston to Seattle — Direct Flights, Duration & Best Travel Time
Data-backed insights on the BOS–SEA route to help you book smarter and time your trip well.
7
Daily Flights
Feb
Cheapest Month
6h 07m
Avg. Flight Duration
Jul
2,496 mi
100%
Nonstop Flights
Insights About Flying from Boston to Seattle
Why Fly to Seattle from Boston?
Seattle pairs a dramatic mountain-and-water setting with a coffee-and-tech culture that’s shaped much of the modern Pacific Northwest.
01
Pike Place Market
The city’s iconic waterfront market has been running since 1907, packed with fishmongers, flower stalls, and the original Starbucks.
02
Space Needle & Chihuly Garden and Glass
Seattle’s signature 1962 World’s Fair landmark sits alongside a striking glass art museum at Seattle Center.
03
Mount Rainier Day Trips
The Pacific Northwest’s most iconic peak is about a 2-hour drive from Seattle, with hiking trails for every skill level.
04
Seattle’s Coffee Culture
As the birthplace of Starbucks and home to countless independent roasters, Seattle takes its coffee seriously.
05
Puget Sound Ferries
A short ferry ride across the Sound offers some of the best skyline views in the city, along with easy day trips to Bainbridge Island.
06
Gateway to Alaska Cruises
Seattle is a major departure port for Alaska cruises, making this route a popular connection for cruise-bound East Coast travelers.
BOS & SEA — Quick Facts
Boston Logan Intl
Distance to Downtown Minneapolis
Known For
Transit to Downtown
Time Zone
Seattle–Tacoma Intl
ICAO Code
Distance to the Strip
1 (with satellites)
Known For
Taxi to the Strip
Time Zone
How to Find the Cheapest Boston–Seattle Fares
01
Book 4–6 Weeks Ahead
Fares on this long transcontinental route are typically lowest about a month out, especially outside summer peak.
02
Fly Tuesday or Wednesday
Midweek departures consistently undercut Friday and Sunday fares on this business-heavy corridor.
03
Compare Alaska vs. Delta
Both carriers operate strong schedules on this route — compare their fares and frequent flyer value alongside JetBlue and United.
04
Set a Fare Alert
Fares on this route shift often as four carriers compete — an alert catches drops the moment they post.
05
Avoid Peak Summer Weeks
June through August sees the highest average fares as Pacific Northwest summer and Alaska cruise season both peak — shoulder-season travel runs noticeably cheaper.
06
Consider Redeye Options
Given the long flying time, some westbound or eastbound redeye options exist and can occasionally price lower than daytime departures.
Frequently Asked Questions
Aim to book 4–6 weeks before departure for the best fares, and earlier still around summer and major holiday weekends.
Yes, Alaska, Delta, JetBlue, and United all operate this route nonstop, with a typical flight time of about 6 hours 5 minutes — one of the longer domestic nonstops in the country.
Basic Economy and restrictive fares are the most limited. Alaska and Delta's standard fares offer more flexibility; always check fare rules at checkout.
Book 4–6 weeks ahead, fly midweek, compare all four carriers, and avoid peak summer weeks if your dates are flexible.
Yes — Seattle is on Pacific Time, three hours behind Boston, so outbound flights can land earlier local time than they departed.
The Complete Guide
Everything to Know About Cheap Flights from Boston to Seattle
One of the Longer Nonstop Domestic Routes
At nearly 2,500 miles, Boston to Seattle is one of the longer scheduled nonstop routes in the U.S., with about 7 daily departures across four carriers. It connects two major tech, biotech, and academic hubs, with strong summer leisure and cruise-connection demand.
What You’ll Actually Pay
One-way fares typically start around $79 and round-trips from $139, climbing during summer and major holiday weekends. Comparing all four carriers usually finds the real best deal.
Compare All Four Carriers Directly
With no dominant ultra-low-cost carrier on this route, comparing Alaska, Delta, JetBlue, and United’s standard fares side by side is the most reliable way to find savings.
Ready to Book Your Cheap Flight to Seattle?
Compare Delta, Alaska, JetBlue, and United, lock in your BOS → SEA fare, and get to the Pacific Northwest faster. No booking fees — ever.
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