Alaska Airlines Flights from Seattle to Boston
expand_more
1 Passenger
expand_moretoday
today
Lowest fares from Seattle to Boston
location_on
location_on
One-way low-fare flights Seattle to Boston.*
flight_takeoff
flight_land
sortkeyboard_arrow_down
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Sep 24, 2025 | From $109 Seen: 1 day ago | |
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Sep 16, 2025 | From $109 Seen: 1 day ago | |
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Sep 3, 2025 | From $109 Seen: 9 hours ago | |
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Sep 30, 2025 | From $109 Seen: 5 hours ago | |
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Oct 8, 2025 | From $109 Seen: 9 hours ago | |
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Sep 10, 2025 | From $109 Seen: 1 day ago | |
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Sep 13, 2025 | From $109 Seen: 10 hours ago | |
| Seattle (SEA) | Boston (BOS) | One-way | Saver | Depart: Nov 8, 2025 | From $109 Seen: 1 hour ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.