Cheap flights from Boston to Seattle

Flights overview

Useful information for finding cheap flights from Boston to Seattle and booking your next trip
Cheapest round-trip flights $237
Delta Nonstop 7 hr Sat, Feb 28 — Sat, Mar 7
The cheapest round-trip flight from Boston to Seattle is currently $237
Cheapest one-way flight $119
Alaska Nonstop 7 hr Wed, Feb 25
The cheapest one-way flight from Boston to Seattle is currently $119
Last-minute weekend getaway $568
United 1 stop 11 hr Fri, Jan 23 — Sun, Jan 25
The cheapest last-minute weekend getaway from Boston to Seattle is currently $568
Cheapest business class flights $1,019
American 1 stop 15 hr Sun, Mar 1 — Tue, Mar 10
The cheapest business class round-trip flight from Boston to Seattle is currently $1,019
Fastest flight 6 hr 13 min The fastest nonstop flight from Boston to Seattle takes 6 hr 13 min
Nonstop flights Every day There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Boston to Seattle is typically September. The most expensive month to fly is typically December.
September
Cheapest
Typical prices: $195–275
December
Most expensive
Typical prices: $285–600

Popular airlines from Boston to Seattle

  • Delta
    Nonstop
    from $237
    Typical price: $265–580
    14 weekly nonstop flights
    BOS - SEA Every day
    265 weekly connecting flights
    BOS - SEA Every day
  • Alaska
    Nonstop
    from $257
    Typical price: $270–620
    14 weekly nonstop flights
    BOS - SEA Every day
    14 weekly connecting flights
    BOS - SEA Every Mon, Tue, Wed, Thu, Fri, Sun
  • United
    from $258
    Typical price: $265–520
    225 weekly connecting flights
    BOS - SEA Every day
  • American
    from $260
    Typical price: $270–560
    218 weekly connecting flights
    BOS - SEA Every day
  • Southwest
    from $302
    Typical price: $325–620
    43 weekly connecting flights
    BOS - SEA Every day
  • Frontier
    Typical price: $255–690
    5 weekly connecting flights
    BOS - SEA Every Wed, Thu, Sat, Sun

Popular airports near Boston

  • Boston Logan International Airport (BOS)
    Boston United States 12 min 2 mi
  • John F. Kennedy International Airport (JFK)
    New York United States 3 hr 39 min 184 mi
  • LaGuardia Airport (LGA)
    New York United States 3 hr 27 min 181 mi
  • Rhode Island T.F. Green International Airport (PVD)
    Providence United States 1 hr 7 min 47 mi

Popular airports near Seattle

  • Seattle-Tacoma International Airport (SEA)
    Seattle United States 18 min 11 mi
  • Paine Field (PAE)
    Everett United States 31 min 21 mi
  • King County International Airport - Boeing Field (BFI)
    Seattle United States 11 min 5 mi
  • Portland International Airport (PDX)
    Portland United States 2 hr 44 min 140 mi

Frequently asked questions about flying from Boston to Seattle

The cheapest flights from Boston to Seattle are usually in September. Typical ticket prices in September range from $195 to $275.
The cheapest round-trip flight from Boston to Seattle recently found on Google Flights was with Delta from $237. The cheapest one-way flight was with Alaska from $119.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Delta flight from Boston to Seattle is $237, flying from Feb 28 to Mar 7.
  • The cheapest Alaska flight from Boston to Seattle is $257, flying from Feb 28 to Mar 7.
  • The cheapest United flight from Boston to Seattle is $258, flying from Feb 19 to Feb 25.
  • The cheapest American flight from Boston to Seattle is $260, flying from Feb 26 to Mar 4.
  • The cheapest Southwest flight from Boston to Seattle is $302, flying from Feb 26 to Mar 4.
The cheapest round-trip flight from Boston to Seattle starts at $237 from Sat, Feb 28 to Sat, Mar 7. The cheapest one-way flight starts at $119 and departs on Wed, Feb 25.
6 hr 13 min is the shortest flight time from Boston to Seattle.
Most visitors come May–Sep, a period encompassing events such as the Seattle International Film Festival (May); Seafair (Jul), a summer festival including boat races, marathons and parades; and Bumbershoot (Sep), an international music and arts festival. Rainy season is Nov–May, though rain is possible year-round.
It's easy to use Google Flights to find the cheapest days to fly from Boston to Seattle.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.
What counts as the best airline for your flights from Boston to Seattle really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Boston to Seattle.

In terms of nonstop flights, Delta is the most popular. Delta offers 14 nonstop flights and 265 connecting flights per week. Delta flies from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) .

Other popular airlines flying from Boston to Seattle are:
  • Alaska offers 14 nonstop flights and 14 connecting flights per week. Alaska flies from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) .
  • United offers 225 connecting flights per week. United flies from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) .
  • American offers 218 connecting flights per week. American flies from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) .
  • Southwest offers 43 connecting flights per week. Southwest flies from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) .
  • Frontier offers 5 connecting flights per week. Frontier flies from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) .
The number of connecting flights refers to distinct flights with at least one stop between Boston and Seattle.
The cheapest round-trip flight from Boston to Seattle recently found on Google Flights was with Delta from $237. The cheapest one-way flight was with Alaska from $119.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Delta flight from Boston to Seattle is $237, flying from Feb 28 to Mar 7.
  • The cheapest Alaska flight from Boston to Seattle is $257, flying from Feb 28 to Mar 7.
  • The cheapest United flight from Boston to Seattle is $258, flying from Feb 19 to Feb 25.
  • The cheapest American flight from Boston to Seattle is $260, flying from Feb 26 to Mar 4.
  • The cheapest Southwest flight from Boston to Seattle is $302, flying from Feb 26 to Mar 4.
Alaska and Delta fly direct from Boston to Seattle.
  • There are 14 Delta direct flights from Boston to Seattle per week. Flights are available every day.
  • There are 14 Alaska direct flights from Boston to Seattle per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
The cheapest last-minute deal between Boston and Seattle at price $568 is offered by United from Fri, Jan 23 to Sun, Jan 25.
Alaska and Delta fly direct from Boston to Seattle.
  • There are 14 Delta direct flights from Boston to Seattle per week. Flights are available every day.
  • There are 14 Alaska direct flights from Boston to Seattle per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
There are direct flights from Boston to Seattle on a daily basis.
The cheapest direct (nonstop) round-trip flights between Boston and Seattle start at $237 from Sat, Feb 28 to Sat, Mar 7 with Delta.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Boston to Seattle, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.
The cheapest business class round-trip flights between Boston and Seattle start at $1,019 from Sun, Mar 1 to Tue, Mar 10 with American.
The cheapest economy class round-trip flights between Boston and Seattle start at $237 from Sat, Feb 28 to Sat, Mar 7.
To book business class trips from Boston to Seattle, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.
The best last-minute getaway deal for the next weekend between Boston and Seattle starts at $568 from Fri, Jan 23 to Sun, Jan 25 with United.
The cheapest last-minute deal between Boston and Seattle at price $568 is offered by United from Fri, Jan 23 to Sun, Jan 25.
To find last-minute flight deals from Boston to Seattle, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.

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