C$ 283 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 1:30 pm
• Latest: departs at 7:26 pm and lands at 1:56 am.

The flight takes about 6h 30m.

Only Economy Class is available on flights from Boston to Seattle.

A direct flight from Boston to Seattle takes 6h 30m, covering 6,441 km.

No, a passport is not required for this domestic route, but you will need another form of identification, such as a driver's licence.

Round-trip flights from Boston to Seattle range from C$ 510 to C$ 787, with an average of C$ 632 over the past 12 months. Anything below C$ 510 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 40% above the C$ 632 route average. Book 26 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 394 round-trip via New York John F Kennedy Intl (JFK), compared to C$ 633 for direct.

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

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

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 49–C$ 140 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 60% leaving in that window. Evening departures account for 40%, Afternoon flights for 0%, 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 C$ 469 to C$ 2,437. 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:

• Delta
• Alaska Airlines
• JetBlue

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 C$ 292, which is 24% below the typical average for this route.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging C$ 86 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 three 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 C$ 597 round-trip on average, while Monday is the most expensive at C$ 692, a difference of C$ 95.

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

2 airlines operate flights between Boston and Seattle. The airlines offering direct flights on this route include:

• Delta
• Alaska Airlines

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 Lumen Field, T-Mobile Park, and Seattle Waterfront. These are among the most viewed places in Seattle on KAYAK.

Among airlines operating Boston to Seattle flights:

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

• Delta: a carry-on bag and a checked bag in Economy Class
• Alaska Airlines: a carry-on bag and a checked bag in Economy Class
• American Airlines: a carry-on bag and a checked bag in First Class

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