$186 Find Cheap Flights from Boston to Seattle - Compare and Save

These are the earliest and latest flight times available from Boston to Seattle:

• Earliest: departs at 7:00 am and lands at 1:27 pm
• Latest: departs at 7:45 pm and lands at 2:12 am.

The flight takes about 6h 27m.

Four cabin classes are available on flights from Boston to Seattle:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

A nonstop flight from Boston to Seattle takes 6h 27m, covering 2,487 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

Round-trip flights from Boston to Seattle range from $364 to $563, with an average of $452 over the past 12 months. Anything below $364 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 40% above the $452 route average. Book 26 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $281 round-trip via New York John F Kennedy Intl (JFK), compared to $452 for nonstop.

Delta is slightly above the route average for timely arrivals, while JetBlue has a lower on-time arrival rate. On-time arrival rates on Boston to Seattle flights are:

• Delta: 84% on time
• JetBlue: 82% on time
• Alaska Airlines: 81% on time

Overall, flights on this route are punctual 82% of the time on average.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $35–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Airbus A321neo family is used most often on this route, operated mainly by Delta. Other aircraft seen on the route include Airbus A321-100/200 variants.

Morning is the busiest departure period on Boston to Seattle flights, with 58% of flights leaving in that window. Evening departures account for 28%, afternoon flights for 14%, and night flights for 0%.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $328 to $1,667. That means the highest observed fare was about 5x higher than the lowest one.

Three airlines offer in-flight Wi-Fi on Boston to Seattle flights:

• Alaska Airlines
• JetBlue
• Delta

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from Boston to Seattle are currently lower than usual. Average one-way flight prices are about $188, which is 32% below the typical average for this route.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:

• Fox
• Europcar
• Thrifty
• Budget
• Hertz

Flights from Boston to Seattle usually depart from Boston Logan Intl (BOS) and arrive at Seattle/Tacoma Intl (SEA).

Morning flights have the fewest delays on this route, while evening departures tend to have the most.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Boston to Seattle route, 18% of flights were delayed in the past 3 months, with delays averaging 2h 51m.

One-stop flights from Boston to Seattle most commonly connect through:

• Chicago O'Hare Intl (ORD) - 31% of one-stop connections
• Philadelphia (PHL) - 24% of one-stop connections
• Chicago Midway (MDW) - 12% of one-stop connections
• Minneapolis St Paul (MSP) - 10% of one-stop connections

Yes. Flexible dates can save you up to 14% on flights from Boston to Seattle. Wednesday is the cheapest departure day at $427 round-trip on average, while Monday is the most expensive at $495, a difference of $68.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

3 airlines operate flights between Boston and Seattle. The airlines offering nonstop flights on this route include:

• Delta
• Alaska Airlines
• JetBlue

Flying via Portland (PDX) gives the shortest average 1-stop total travel time at 8h 07m, compared with 8h 18m via Chicago Midway (MDW) and 8h 25m via Chicago O'Hare Intl (ORD).

Seattle is 3 hours behind Boston (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

Among airlines operating Boston to Seattle flights:

• Alaska Airlines: offers extra legroom; offers free seat selection
• JetBlue: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection
• American Airlines: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• Delta: a cabin bag and a checked bag in Economy Class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

While there are no hotels located onsite at Seattle-Tacoma International Airport, there is a cluster of hotels just shy of a mile away from the airport’s terminals. Hilton Seattle Airport & Conference Center, Crowne Plaza Seattle Airport, and Seattle Airport Marriott all are within a mile of the airport and offer free airport pickup and drop-off.

Alaska Airlines, jetBlue Airways, and Delta Air Lines all offer nonstop flights from Boston to Seattle. One-stop flights are also common between the two cities, with flights offered by airlines such as United Airlines, Delta Air Lines, and American Airlines. Common layover cities for such flights include Washington D.C., Detroit, and Philadelphia.

If you are not renting or driving a vehicle, Link Light Rail is the quickest way to get from the airport to downtown Seattle. Link Light Rail trains connect Seattle-Tacoma International Airport directly to downtown Seattle, and they even run all the way north up to the University of Washington. The airport’s Link station is found on the fourth floor of the adjacent parking garage.

Seattle-Tacoma International Airport and Boston Logan International Airport both have children’s play areas available. Seattle-Tacoma International Airport’s children’s play area, the Playroom, is located across from the Seattle Tap Room by the A gates in the Central Terminal. Boston Logan International Airport’s three children’s play areas are located by Gate 18 in Terminal A, Gate 30 in Terminal B, and Gate 25 in Terminal C.

Multiple airlines run several lounges at Seattle-Tacoma International Airport (SEA). They include The American Express Centurion Lounge and the United Club. Travelers flying aboard Alaska Airlines should know that the airline operates three lounges at this facility. There’s one at Concourse C, adjacent to gate C16A, Concourse D, near gate D1, and the North Satellite Terminal, close to gate N2.

Passengers flying aboard Delta Airlines should remember that the carrier has its hub at Seattle-Tacoma International Airport (SEA), and you'll arrive through the main terminal, Concourse A. You'll enjoy the two Delta Sky Clubs located in Concourse A, near gate A, and South Satellite Terminal, near gate S9. Also, you'll receive priority clearance under the fast lane program.

Seattle-Tacoma International Airport (SEA) features suites that cater to the needs of moms. Located in Concourse D on the lower level of D Annex, these rooms provide privacy as you pump and breastfeed the little ones. Other amenities in these rooms include sinks, comfy chairs, and electrical sockets.

Passengers arriving at SEA from BOS who feel that they want to leave excess baggage behind, you’ll get storage facilities between baggage carousels 12 & 13. The facility lockers operate between 5:30 am until 12:30 am.