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Latest Flight Deals from Boston to Seattle

Book one-way or return flights from Boston to Seattle from as little as NZD 206. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • BOS12:17
        11h 38m
        1 stop
        SEA20:55
        Wed, May 8|Boston - Seattle|Spirit Airlines
        NZD 206NZD 336
        39% OFF
        39% OFF
        NZD 336NZD 206
      • BOS19:59
        6h 14m
        Direct
        SEA23:13
        Sat, May 4|Boston - Seattle|Alaska Airlines
        NZD 209NZD 336
        38% OFF
        38% OFF
        NZD 336NZD 209
      • BOS12:17
        11h 38m
        1 stop
        SEA20:55
        Wed, May 22|Boston - Seattle|Spirit Airlines
        NZD 211NZD 336
        37% OFF
        37% OFF
        NZD 336NZD 211
      • BOS07:00
        6h 15m
        Direct
        SEA10:15
        Tue, May 7|Boston - Seattle|Alaska Airlines
        NZD 212
        NZD 212
      • BOS05:18
        21h 37m
        1 stop
        SEA23:55
        Tue, Jun 11|Boston - Seattle|American Airlines
        NZD 216
        NZD 216
      • BOS18:55
        6h 17m
        Direct
        SEA22:12
        Tue, May 7|Boston - Seattle|Delta Air Lines
        NZD 218
        NZD 218
      • BOS16:49
        6h 5m
        Direct
        SEA19:54
        Sun, May 5|Boston - Seattle|Jetblue Airways
        NZD 231
        NZD 231
      • BOS19:59
        6h 9m
        Direct
        SEA23:08
        Sat, Jun 8|Boston - Seattle|Alaska Airlines
        NZD 231
        NZD 231
      • BOS16:25
        6h 5m
        Direct
        SEA19:30
        Tue, May 7|Boston - Seattle|Jetblue Airways
        NZD 233
        NZD 233
      • BOS19:59
        6h 9m
        Direct
        SEA23:08
        Sat, May 25|Boston - Seattle|Alaska Airlines
        NZD 234
        NZD 234
      • BOS13:00
        3h 5m
        Direct
        SEA14:00
        Sun, May 5|Boston - Seattle|Spirit Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from Boston to Seattle? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Boston to Seattle. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Boston to Seattle

View airlines operating flights from Boston to Seattle. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Spirit Airlines
From NZD 206
Frontier Airlines
From NZD 238
United Airlines
From NZD 249
Sun Country Airlines
From NZD 273
Southwest Airlines
From NZD 275
Delta Air Lines
From NZD 453
Jetblue Airways
From NZD 556
Alaska Airlines
From NZD 569
American Airlines
From NZD 647
Hawaiian Airlines
From NZD 1,230
ANA airlines

Find more flights and airlines

Alternative Routes from Boston to Seattle

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Boston to Seattle.

  • Cheapest
    Alaska Airlines
    BOS
    11:00
    6h 14m
    Direct
    SEA
    14:14
    General Edward Lawrence Logan International Airport - Seattle-Tacoma International Airport
    Tue, Apr 30Alaska Airlines
    NZD 569
  • Alaska Airlines
    BOS
    11:00
    6h 14m
    Direct
    SEA
    14:14
    General Edward Lawrence Logan International Airport - Seattle-Tacoma International Airport
    Tue, Apr 30Alaska Airlines
    NZD 569
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from Boston (BOS) to Seattle (SEA) the cheapest?

    Airlines adjust prices for flights from Boston to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Boston (BOS) to Seattle (SEA) cost?

    According to Trip.com's data, the lowest price is around NZD 814.

  • How long does it take to fly from Boston (BOS) to Seattle (SEA) and what is the distance?

    It takes around 6 hours 18 minutes to fly from Boston (BOS) to Seattle (SEA).

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17km. It takes about 30 minutes by taxi.

  • What are the most popular airlines that fly from Boston (BOS) to Seattle (SEA)?

How to find a cheap flight from Boston to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Boston to Seattle. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
Flight Information from Boston to Seattle

Cheapest nonstop flight price

NZD 205

Cheapest round-trip ticket price

NZD 400

Off-season for travel

December

Peak season for travel

October

Flight distance

4,005.09km

Average flight time

6 hours 18 minutes

Popular airline

Alaska Airlines

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