flight_takeoff SEA → BOS

Cheap Flights from Seattle to Boston

Compare fares on the long-haul transcontinental flight from Seattle to Boston — a eastbound route of about 2,489 miles, typically flown nonstop in around 5h 30m.

straighten

Distance

2,489 mi

4,006 km

schedule

Est. flight time

5h 30m

nonstop

flight

Nonstop service

Available

3 carriers

language

Time difference

3 hours ahead

Boston

Flying from Seattle to Boston

Flights from Seattle Tacoma International Airport (SEA) to General Edward Lawrence Logan International Airport (BOS) cover roughly 2,489 miles (4,006 km) on a eastbound heading, a nonstop flight of about 5h 30m. The route crosses 3 time zones — Boston is 3 hours ahead of Seattle. It's served by 3 airlines.

Lets Fly Travel compares live fares across hundreds of airlines to find the best deal on this route — and every booking is reviewed by a real travel agent before ticketing.

Airlines on this route

Carriers that have operated nonstop service between SEA and BOS include:

flightAlaska Airlines flightAmerican Airlines flightJetBlue Airways

Airline availability and fares change over time — search your dates for current options.

Best time to fly Seattle to Boston

Fare patterns and travel conditions vary by season. Here's what to expect on the SEA–BOS route throughout the year.

Jan–Feb

Post-holiday lull means some of the lowest fares of the year on the Seattle–Boston route. Great for a spontaneous escape.

Mar–May

Spring break drives demand on transcontinental routes like SEA–BOS. Book at least 4–6 weeks ahead for the best prices.

Jun–Aug

Summer is the busiest season for Seattle to Boston travel. Mid-week flights (Tue/Wed) typically undercut weekend fares by 15–25%.

Sep–Oct

Fares often drop after Labor Day. September and October are among the cheapest months to fly this long-haul transcontinental flight.

Nov–Dec

Thanksgiving week and the Christmas/New Year period see significant fare increases. Flexibility on exact dates can save considerably.

flight_land Arriving at

General Edward Lawrence Logan International Airport

Boston is served by General Edward Lawrence Logan International Airport (IATA: BOS , ICAO: KBOS). Allow time for baggage claim and ground transportation after landing.

IATA Code

BOS

Flight Time

~5h 30m

Distance

2,489 mi

tips_and_updates Arrival tips

›Check in online to save time at the airport.
›Arrive 2 hours before departure.
›Compare fares across several nearby dates for best value.

Seattle to Boston — FAQs

How long is the flight from Seattle to Boston? expand_more

A nonstop flight from Seattle (SEA) to Boston (BOS) takes approximately 5h 30m, covering a distance of about 2489 miles (4006 km). Actual flight time varies with aircraft, routing and winds.

Which airlines fly from Seattle to Boston? expand_more

Airlines that have operated nonstop service on the SEA–BOS route include Alaska Airlines, American Airlines, JetBlue Airways. Use our search to compare current carriers, schedules and fares.

Is there a nonstop flight from Seattle to Boston? expand_more

Yes. The SEA–BOS route has nonstop service. Nonstop availability can vary by season and day of week, so check live results for your dates.

How far is Boston from Seattle? expand_more

The distance from Seattle (SEA) to Boston (BOS) is about 2489 miles (4006 km) as the crow flies.

What is the time difference between Seattle and Boston? expand_more

Boston is 3 hours ahead of Seattle. Factor the time change into your arrival and connection planning.

When is the best time to book flights from Seattle to Boston? expand_more

For domestic routes like Seattle to Boston, booking about 1–3 months ahead and choosing mid-week departures usually finds the best prices. Avoid peak Friday and Sunday travel where possible.