Cheap Flights from Seattle to Boston
Flights from Seattle to Boston
Sorted by price. All fares round-trip unless noted.
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Search Seattle → BostonCould two one-way tickets be cheaper?
On many routes, buying separate outbound + return one-ways beats the round-trip. Different airlines price each direction independently, so the split is sometimes $50–$200 cheaper.
Run the split-fare checkFrequently asked questions
How much does it cost to fly from Seattle to Boston?+
Prices from Seattle to Boston vary by season, airline, and how far ahead you book. Searching 4–6 weeks out typically yields the lowest fares.
Are there nonstop flights from Seattle to Boston?+
Nonstop availability on this route varies by season. Many connections route through major hubs. Use filters in the full search to check nonstop-only options.
What is the cheapest day to fly from Seattle to Boston?+
Tuesdays and Wednesdays are typically the cheapest departure days across most routes. Saturdays tend to be the most expensive. Even shifting your departure by 1–2 days can save $40–$80.
What is split-fare and can it save money on Seattle to Boston?+
Split-fare means booking two separate one-way tickets instead of one round-trip. Different airlines price outbound and return legs independently, so the combination can be cheaper. Hopfare's split-fare engine checks this automatically — on many routes it saves $50–$200.
Which airlines fly from Seattle to Boston?+
Multiple airlines serve this route. Use the full search above to see today's available carriers and compare prices.
Search Seattle → Boston
Pick dates, filter airlines, and run the split-fare engine — all in one search.
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