Seattle to Boston flights
Round trip · Economy · Prices per person in USD
Prices updated
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when Seattle → Boston drops below your price.Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $420 |
| November 2026 | No fares found yet |
| December 2026 | No fares found yet |
| January 2027 | $259 (cheapest month) |
Cheapest dates in the next 4 months
Round trip, per person-
Oct 5 – 9 4 nights · leave Mon$420$420 Book
Alaska Airlines Nonstop · 5h 26m -
Oct 7 – 11 4 nights · leave Wed$460$460 Book
Alaska Airlines Nonstop · 5h 27m
-
Oct 6 – 10 4 nights · leave Tue$603$603 Book
jetBlue Nonstop · 5h 21m -
Oct 9 – 12 3 nights · leave Fri$603$603 Book
Alaska Airlines 2 stops · 9h 08m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
Boston · Jan 10 – 17, 2027Travel insurance · EKTA Airport transfer · Kiwitaxi
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Seattle to Boston: questions
How much is a flight from Seattle to Boston?
The cheapest round trip we have found right now is $259, leaving January 10 and returning January 17. Prices are per person, economy, in USD.
About this route
We track round-trip economy fares from Seattle (United States) to Boston (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $259, departing January 10 and returning January 17. The cheapest month to fly in our data is January, from $259. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.