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Cheap flights from Boston to Seattle

One-way from $142, found by travellers in the last 7 days. The live price is checked when you book.

Departure
Return
Prices for nearby dates
Mon, Nov 2$172Tue, Nov 3$285Wed, Nov 4Any priceThu, Nov 5$142Fri, Nov 6Any priceSat, Nov 7Any priceSun, Nov 8$231Mon, Nov 9Any 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
$142
Alaska Airlines, flight AS 459Found 4 days ago, 1 adult
Check live price
7:13amBostonThu, Nov 5
Travel time 6h 26m, nonstopBOSSEA
10:39amSeattleThu, Nov 5
$172
Alaska Airlines, flight AS 459Found 4 days ago, 1 adult
Check live price
7:13amBostonMon, Nov 2
Travel time 6h 26m, nonstopBOSSEA
10:39amSeattleMon, Nov 2
$227
Alaska Airlines, flight AS 389Found yesterday, 1 adult
Check live price
6:13pmBostonSun, Dec 13
Travel time 9h 59m, 1 stopBOSSEA
1:12amSeattleMon, Dec 14
$231
United Airlines, flight UA 1023Found 3 days ago, 1 adult
Check live price
7:10amBostonSun, Nov 8
Travel time 9h 6m, 1 stopBOSSEA
1:16pmSeattleSun, Nov 8
$233
Alaska Airlines, flight AS 459Found 2 days ago, 1 adult
Check live price
7:08amBostonMon, Apr 12
Travel time 6h 22m, nonstopBOSSEA
10:30amSeattleMon, Apr 12

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 Seattle, booked ahead at a fixed price.
    See options
  • Things to do in SeattlePopular tours from $32 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

MoTuWeThFrSaSu12345678910111213141516171819202122232425–26–27$25628–29–30–31–

November 2026

MoTuWeThFrSaSu1–2$1723$2854–5$1426–7–8$2319–10–11–12–13–14–15–16–17–18–19–20–21–22–23–24–25–26–27–28–29–30–

December 2026

MoTuWeThFrSaSu1–2–3–4–5–6–7–8–9–10–11–12–13$22714–15–16–17–18–19–20–21–22–23–2425262728293031
$172 or lessGreen: the cheapest fifth of fares on this route. Lowest in these 60 days: Nov 5, $142.

Lowest fares by month

In the fares found this week, November has the lowest: from $142 one-way, against $256 in October. Pick a month to see its cheapest date.

  1. Oct$256
  2. Nov$142
  3. Dec$227
  4. Janno fares yet
  5. Febno fares yet
  6. Marno fares yet
  7. Apr$233
  8. Mayno fares yet
  9. Jun$240
  10. Julno fares yet
  11. Augno fares yet
  12. Sepno fares yet
$0$100$200$300Oct$142NovDecJanFebMarAprMayJunJulAugSep
Show as a table
MonthCheapest one-wayDateStops
October$256Tue, Oct 271 stop
November$142Thu, Nov 5Nonstop
December$227Sun, Dec 131 stop
January 2027—
February 2027—
March 2027—
April 2027$233Mon, Apr 12Nonstop
May 2027—
June 2027$240Tue, Jun 15Nonstop
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 Seattle. Average daily high and low and monthly precipitation, 1991–2020 normals.

Oct2026NovDecJan2027FebMarAprMayJunJulAugSep
Lowest fare$256$142$227–––$233–$240–––
High °C16°11°8°9°10°12°15°19°22°25°25°22°
Low °C8°5°3°3°3°4°6°9°12°14°14°12°
Precipitation mm9916014514796106814837152541

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

Questions travellers ask

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

In the fares found this week, November has the lowest: from $142 one-way, against $256 in October.

What is the weather in Seattle in November?

In November, the cheapest month to fly, the average daily high in Seattle is 11 °C and the low 5 °C.

Are there direct flights from Boston to Seattle?

Yes. Recent fares include nonstop flights with Alaska Airlines and jetBlue.

How long is the flight from Boston to Seattle?

A nonstop flight takes about 6h 22m. The distance is 2,487 mi.

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