- Cheapest roundtrip flight
- from€429
- Fastest outbound flight
- Fastest inbound flight
- non-stop flights
- 21x / week
- Flight distance
- 4,010 km
- Time difference
- Most popular airlines
- Delta Air Lines
- Alaska Airlines
- JetBlue Airways
- Delta Air Lines
Flight schedule from Seattle-Tacoma (SEA) to Boston (BOS)
Select a travel date in the flight schedule for the route from Seattle-Tacoma (SEA) to Boston (BOS) and compare affordable flight deals.
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Matching outbound flightsSEA–BOS · 16 of 16
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- October 18 – 24, 2026
- October 25 – 31, 2026
- November 1 – 7, 2026
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Tips and tricks to help you find cheap flights from Seattle Tacoma to Boston
Favorite airline: e.g. Spirit Airlines, Sun Country Airlines
75 % of flights booked on the route from Seattle-Tacoma to Boston are booked with Spirit Airlines, Sun Country Airlines and Delta.
Spirit Airlines
28 %
Sun Country Airlines
28 %
Delta
19 %
Important flight information
Frequently Asked Questions (FAQ)
How long is the flight from Seattle-Tacoma to Boston?
A nonstop flight from Seattle-Tacoma to Boston typically takes around 5 hours 25 minutes. If you choose a connecting flight, allow more travel time. Typical one-stop itineraries take around 9 hours 40 minutes. For the quickest trip, a nonstop flight is usually the most comfortable choice.
Are there nonstop flights from Seattle-Tacoma to Boston?
Yes, there are nonstop flights from Seattle-Tacoma to Boston, averaging around 3 to 4 flights per day, operated by, among others, Delta, Alaska Airlines and JetBlue Airways. If you want to fly without a layover, it is worth filtering specifically for nonstop flights when searching.
Which airlines fly from Seattle-Tacoma to Boston?
Direct flights from Seattle-Tacoma to Boston are operated by, among others, Delta, Alaska Airlines and JetBlue Airways. Connecting flights with one stop are also available, for example with Southwest (via Chicago Midway) and Sun Country Airlines (via Minneapolis). If travel time matters to you, a direct flight is usually the most convenient option. Connecting flights often give you more choice of departure times and airlines.
On which days are there nonstop flights from Seattle-Tacoma to Boston?
Nonstop flights from Seattle-Tacoma to Boston operate daily. The schedule may vary by season, so it is worth comparing several travel dates. If your preferred day does not have a nonstop flight, nearby departure days or short connecting flights may be a good alternative.
How many flights are there per day from Seattle-Tacoma to Boston?
On the route from Seattle-Tacoma to Boston, there are on average around 3 to 4 flights per day. The number of flights can vary by day of the week and season. If you are flexible with your dates, it is worth comparing several departure days.
How many flights per week are there from Seattle-Tacoma to Boston?
From Seattle-Tacoma to Boston, there are around 21 to 22 flights per week. This means you usually have connections available on several days and at various times. Beyond the price, it is worth comparing flight duration, airline, and any potential additional fees.
When does the first flight from Seattle-Tacoma to Boston depart?
The earliest nonstop flight from Seattle-Tacoma to Boston usually departs at 7:15 AM. The exact departure time may vary by day of the week and airline. Early flights are especially useful if you want to make the most of your arrival day in Boston.
When does the last flight from Seattle-Tacoma to Boston depart?
The last nonstop flight from Seattle-Tacoma to Boston usually departs at 11:59 PM. Late flights can be convenient if you want to travel after work or in the evening. Do check whether it is a nonstop flight, as a connecting itinerary could push the arrival time significantly later.