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Cheap flights from Seattle to Boston

One-way from $164, found by travellers in the last 7 days. The live price is checked when you book.

Departure
Return
Prices for nearby dates
Sun, Oct 25Any priceMon, Oct 26$303Tue, Oct 27$164Wed, Oct 28$253Thu, Oct 29Any priceFri, Oct 30Any priceSat, Oct 31Any priceSun, Nov 1Any price

Cheapest one-way tickets

Recent finds on different dates, for 1 adult. Booking opens on Aviasales, which shows baggage, fare rules and the live price.

Cheapest
$164
Alaska Airlines, flight AS 288Found 3 days ago, 1 adult
Check live price
7:18amSeattleTue, Oct 27
Travel time 5h 37m, nonstopSEABOS
3:55pmBostonTue, Oct 27
$179
United Airlines, flight UA 1538Found 5 days ago, 1 adult
Check live price
11:15pmSeattleWed, Nov 4
Travel time 6h 27m, 1 stopSEABOS
8:42amBostonThu, Nov 5
$196
Alaska Airlines, flight AS 1495Found yesterday, 1 adult
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9:59pmSeattleSun, Nov 8
Travel time 6h 28m, 1 stopSEABOS
7:27amBostonMon, Nov 9
$228
United Airlines, flight UA 1372Found 2 days ago, 1 adult
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9:02amSeattleMon, Apr 12
Travel time 8h 15m, 1 stopSEABOS
8:17pmBostonMon, Apr 12
$232
United Airlines, flight UA 2633Found 2 days ago, 1 adult
Check live price
10:40pmSeattleSun, Apr 25
Travel time 6h 31m, 1 stopSEABOS
8:11amBostonMon, Apr 26

Round trips

The cheapest return tickets found recently, price for the whole trip.

Plan the rest of the trip

  • Mobile data in United StatesTravel eSIM from $4, installed before you fly.
    Compare plans
  • Getting from the airportTransfers and car hire in Boston, booked ahead at a fixed price.
    See options
  • Things to do in BostonPopular tours from $38 per person.
    See ideas
  • Flight delayed?Delayed or cancelled? See which passenger rights cover this route.
    Check

Price calendar

The lowest one-way fare found for each day over the next 60 days. A dash means no recent fare; you can still pick that day.

October 2026

MoTuWeThFrSaSu12345678910111213141516171819202122232425–26$30327$16428$25329–30–31–

November 2026

MoTuWeThFrSaSu1–2$2853–4$1795–6–7–8$1969–10–11–12–13–14–15–16–17–18–19–20–21–22–23–24–25–26–27–28–29–30–

December 2026

MoTuWeThFrSaSu1–2–3–4–5–6–7–8–9–10–11–12–13–14–15–16–17–18–19–20–21–22–23–2425262728293031
$179 or lessGreen: the cheapest fifth of fares on this route. Lowest in these 60 days: Oct 27, $164.

Lowest fares by month

In the fares found this week, October has the lowest: from $164 one-way, against $228 in April 2027. Pick a month to see its cheapest date.

  1. Oct$164
  2. Nov$179
  3. Decno fares yet
  4. Janno fares yet
  5. Febno fares yet
  6. Marno fares yet
  7. Apr$228
  8. Mayno fares yet
  9. Junno fares yet
  10. Julno fares yet
  11. Augno fares yet
  12. Sepno fares yet
$0$100$200$300$164OctNovDecJanFebMarAprMayJunJulAugSep
Show as a table
MonthCheapest one-wayDateStops
October$164Tue, Oct 27Nonstop
November$179Wed, Nov 41 stop
December—
January 2027—
February 2027—
March 2027—
April 2027$228Mon, Apr 121 stop
May 2027—
June 2027—
July 2027—
August 2027—
September 2027—

Fares and weather by month

The lowest one-way fare found for each month, next to the weather in Boston. Average daily high and low and monthly precipitation.

Oct2026NovDecJan2027FebMarAprMayJunJulAugSep
Lowest fare$164$179––––$228–––––
High °C17°11°6°3°4°8°14°19°25°28°27°23°
Low °C9°3°-2°-5°-4°-0°5°10°15°19°18°15°
Precipitation mm102931098682106928399838290

Source: Boston on Wikipedia, CC BY-SA 4.0.

Questions travellers ask

What is the cheapest month to fly from Seattle to Boston?

In the fares found this week, October has the lowest: from $164 one-way, against $228 in April 2027.

What is the weather in Boston in October?

In October, the cheapest month to fly, the average daily high in Boston is 17 °C and the low 9 °C.

Are there direct flights from Seattle to Boston?

Yes. Recent fares include nonstop flights with Alaska Airlines.

How long is the flight from Seattle to Boston?

A nonstop flight takes about 5h 37m. The distance is 2,487 mi.

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