C$ 106 Find Cheap Flights from Boise to Seattle – Compare and Save

Among airlines operating Boise to Seattle flights:

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

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

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

• Alaska Airlines
• Delta

Flights from Boise to Seattle usually depart from Boise Air Term. Gowen Fld (BOI) and arrive at Seattle/Tacoma Intl (SEA).

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

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

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

On this route, direct flights are cheaper than layover options on average. Direct fares average C$ 305 round-trip, compared to C$ 338 via a layover through Sacramento Intl (SMF).

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 49–C$ 125 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Alaska Airlines. Other aircraft seen on the route include Embraer 175 (Enhanced Winglets) variants.

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

• Portland (PDX) – 40% of one-stop connections
• Spokane (GEG) – 20% of one-stop connections
• Oakland (OAK) – 20% of one-stop connections
• Sacramento Intl (SMF) – 20% of one-stop connections

Portland (PDX) handles the largest share of one-stop connections on this route.

On the Boise to Seattle route, being flexible with your departure day can save you up to 32%. Saturday is the cheapest day at C$ 282 round-trip on average, while Tuesday is the most expensive at C$ 413 – a C$ 131 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

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 Boise to Seattle route, 12% of flights were delayed in the past 3 months, with delays averaging 1 hour 56 minutes.

Morning is the busiest departure period on Boise to Seattle flights, with 43% leaving in that window. Afternoon departures account for 36%, Evening flights for 21%, and Night flights for 0%.

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.

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

• Earliest: departs at 6:00 am and lands at 7:45 am
• Latest: departs at 9:59 pm and lands at 11:44 pm.

The flight takes about 1h 45m.

Last-minute fares on this route – booked within 2 weeks of departure – run 132% above the route average of C$ 304. Book 8 weeks before departure for the lowest fares.

A direct flight from Boise to Seattle takes 1h 45m, covering 1,031 km.

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.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 246 to C$ 1,152. That means the highest observed fare was about 5x higher than the lowest one.

One-way fares from Boise to Seattle are currently lower than usual. Average one-way flight prices are about C$ 145, which is 51% below the typical average for this route.

Night flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Portland (PDX) gives the shortest average 1-stop total travel time at 3h 20m, compared with 4h 46m via Oakland (OAK) and 5h 47m via Sacramento Intl (SMF).

Seattle is 1 hour behind Boise (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around C$ 5 for economy cars. Top options include:
• Fox
• Europcar
• Thrifty
• Budget
• Dollar

Round-trip flights from Boise to Seattle range from C$ 211 to C$ 435, with an average of C$ 304 over the past 12 months. Anything below C$ 211 counts as a good deal.

Two airlines offer in-flight Wi-Fi on Boise to Seattle flights:

• • Alaska Airlines
• • Delta