$103 Find Cheap Flights from Boise to Seattle - Compare and Save

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

• Earliest: departs at 5:30 am and lands at 7:20 am
• Latest: departs at 9:59 pm and lands at 11:49 pm.

The flight takes about 1h 50m.

Three cabin classes are available on flights from Boise to Seattle:

• Economy Class
• Business Class
• First Class

A nonstop flight from Boise to Seattle takes 1h 50m, covering 398 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 Boise to Seattle range from $163 to $348, with an average of $247 over the past 12 months. Anything below $163 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 114% above the $247 route average. Book 8 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $226 round-trip via San Francisco (SFO), compared to $248 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $35–$90 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 Boeing 737-700 variants.

Morning is the busiest departure period on Boise to Seattle flights, with 47% of flights leaving in that window. Afternoon departures account for 30%, evening flights for 23%, 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 $217 to $993. That means the highest observed fare was about 5x higher than the lowest one.

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

• Alaska Airlines
• 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 Boise to Seattle are currently lower than usual. Average one-way flight prices are about $121, which is 47% below the typical average for this route.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging $61 for economy cars. Top options include:

• Europcar
• Fox
• Thrifty
• Budget
• Dollar

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

Night 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 Boise to Seattle route, 12% of flights were delayed in the past 3 months, with delays averaging 1h 57m.

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

• Portland (PDX) - 25% of one-stop connections
• San Francisco (SFO) - 25% of one-stop connections
• Sacramento Intl (SMF) - 25% of one-stop connections
• Spokane (GEG) - 13% of one-stop connections

Yes. Flexible dates can save you up to 27% on flights from Boise to Seattle. Saturday is the cheapest departure day at $217 round-trip on average, while Monday is the most expensive at $297, a difference of $80.

Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

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

• Alaska Airlines
• Delta

Flying via Portland (PDX) gives the shortest average 1-stop total travel time at 3h 21m, compared with 4h 52m via San Francisco (SFO) and 5h 56m 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.

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 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.

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
• Hawaiian Airlines: 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.

The airport has provided step-free access by providing elevators and ramps around the airport. TTY telephones and visual paging monitors are also available inside the terminal to cater to all passengers with special needs. Accessible parking and public transport are also provided at BOI 24h a day, and so are the accessible restrooms on each floor of Boise Airport.

The first option is the bus, which you can get at the street opposite the Sea-Tac Airport LINK Light Rail station and on the lower drive of the main terminal. These buses head downtown and to the surrounding areas. The second option is the LINK Light Rail system. You’ll get these trains from the airport’s parking garage, fourth floor. Trains run every 6-15min. Taxis are also available at the airport garage third floor, and so are shared shuttles offering door-to-door services. If you want to get your own wheels, head to the rental car center, just outside baggage claim.

Several nonstop flights from Boise to Seattle are offered. If you wish to travel sustainably, fly with Alaska Airlines and Delta. On average, around 990 kg of carbon is emitted per passenger on flights from Boise to Seattle. These airlines emit 91% and 81% less carbon per passenger, making them a very sustainable option. Moreover, they both offer nonstop flights from BOI to SEA.

The Mother’s Room is a quiet private place where nursing mothers can feed their babies privately. These rooms have rocking chairs and adjustable lighting, allowing mothers to lull their babies to sleep. Strollers and baby seats are also available for rent at SEA. Around baggage claim, you’ll find the rental station, Smarte Carte Storage. The airport has provided a kids’ play area with toys and climbing structures between Central Terminal and Gate A for the older kids.