BOI - SEA

$97 Find Cheap Flights from Boise to Seattle - Compare and Save

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Everything you should know

Cheapest round-trip
$183
Typical prices: $152-$313
JetBlue
Wed 10/17Fri 10/26
BOI - SEA • Non-stop
Cheapest one-way
$97
Typical prices: $110-$288
JetBlue
Wed 10/17
BOI - SEA • 1 stop
Nonstop flights
You can fly direct with Alaska Airlines and Delta. Average duration is 1h 43m
Direct flights
+1
Direct flights
+1
Avoid delays
Most punctual • 92% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 8 weeks in advance save around 70% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 36% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $244 (round-trip)
Shortest trip • 3h 20m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Boise to Seattle (BOI-SEA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boise to Seattle

Sat, Oct 17 - Mon, Oct 26
JetBlue Logo
3:36 pm - 4:24 pmBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 48mnonstop
JetBlue Logo
4:02 pm - 6:33 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 31mnonstop
$183JetBlue
Sun, Nov 8 - Mon, Nov 9
Alaska Airlines Logo
6:43 pm - 9:28 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
15h 45m1 stop San Diego
Alaska Airlines Logo
1:03 pm - 3:27 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 24mnonstop
$192Alaska Airlines
Sun, Nov 8 - Mon, Nov 9
Alaska Airlines Logo
6:43 pm - 9:28 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
15h 45m1 stop San Diego
Alaska Airlines Logo
1:03 pm - 3:27 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 24mnonstop
$192Alaska Airlines
Tue, Nov 3 - Wed, Nov 4
Alaska Airlines Logo
6:43 pm - 4:56 pmBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
23h 13m1 stop San Diego
Alaska Airlines Logo
7:50 pm - 10:20 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 30mnonstop
$192Alaska Airlines
Sat, Oct 17 - Mon, Oct 26
JetBlue Logo
1:35 pm - 8:00 pmBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
7h 25m1 stop San Diego
JetBlue Logo
6:55 am - 1:20 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
5h 25m1 stop Oakland
$202JetBlue
Wed, Sep 23 - Tue, Sep 29
Delta Logo
12:17 pm - 1:02 pmBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 45mnonstop
Delta Logo
12:39 pm - 3:16 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 37mnonstop
$207Delta
Tue, Sep 22 - Tue, Sep 29
Delta Logo
6:45 am - 7:35 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 50mnonstop
Delta Logo
7:15 am - 9:54 amSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 39mnonstop
$207Delta
Tue, Sep 22 - Sat, Oct 3
Delta Logo
8:55 am - 9:50 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 55mnonstop
Delta Logo
4:04 pm - 6:40 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 36mnonstop
$207Delta
Mon, Sep 14 - Wed, Sep 16
Frontier Logo
2:50 pm - 9:42 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
19h 52m1 stop Las Vegas Harry Reid Intl
Frontier Logo
9:45 pm - 1:55 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
15h 10m1 stop Las Vegas Harry Reid Intl
$225Frontier
Wed, Oct 7 - Sat, Oct 10
United Airlines Logo
6:50 pm - 1:15 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
7h 25m1 stop San Francisco
United Airlines Logo
7:11 am - 12:58 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
4h 47m1 stop San Francisco
$227United Airlines
Booking Insights

Price, demand and travel trends for Boise to Seattle flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Boise to Seattle with more confidence.

How much is a round-trip flight from Boise to Seattle?

Round-trip flights from Boise to Seattle start at $183. Prices are typical for this route right now, with typical round-trip fares ranging from $152 to $313. The lowest price found in the past 5 days was $183 on JetBlue.

What's the cheapest day of the week to fly from Boise to Seattle?

Saturday is the cheapest day of the week to fly from Boise to Seattle, it is 8% cheaper than the average day. Tuesday is the most expensive day with flight prices 35% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Boise to Seattle?

  • January is the cheapest month to fly from Boise to Seattle at $139 round-trip.
  • June ($332) and July ($312) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 138% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Boise to Seattle the cheapest?

Flights from Boise to Seattle are cheapest 8 weeks before departure. Booking in this window typically costs about 70% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Boise to Seattle

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Key details for Boise to Seattle flights

Low season

March

Cheapest flight

$97
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 52% increase in price.
Flight from Boise to Seattle

When to book flights from Boise to Seattle

Are your dates flexible? Find out the best times to travel from Boise to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Boise to Seattle flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which accessible services are offered at Boise Airport?

    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.

  • What are the transport options from Seattle-Tacoma International 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.

  • What are the most sustainable airlines flying from Boise to Seattle?

    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.

  • Which family services are offered at Seattle-Tacoma International Airport?

    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.

  • Which airlines offer extra legroom and free seat selection on Boise to Seattle flights?

    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.

  • What airlines are available from Boise to Seattle?

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

  • Which airports can I use when flying from Boise to Seattle?

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

  • Which airlines include bags at no extra cost on Boise to Seattle flights?

    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 First Class
    • Hawaiian Airlines: a cabin bag in Economy Class class

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

  • What cabin classes can I book on flights from Boise to Seattle?

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

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

    Prices vary by airline.

  • How much can I save by taking a layover when flying from Boise to Seattle?

    On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $219 round-trip, compared to $244 via a layover through Sacramento Intl (SMF).

  • What is the standard checked-bag allowance on flights from Boise to Seattle?

    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.

  • Which aircraft model is used most often on flights from Boise to Seattle?

    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.

  • Which airports do connecting flights from Boise to Seattle pass through?

    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.

  • Can I save money by using flexible dates for flights from Boise to Seattle?

    On the Boise to Seattle route, being flexible with your departure day can save you up to 32%. Saturday is the cheapest day at $203 round-trip on average, while Tuesday is the most expensive at $297: a $94 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • At what point is a flight considered delayed from Boise to Seattle?

    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.

  • How are flight departures from Boise to Seattle spread across the day?

    Morning is the busiest departure period on Boise to Seattle flights, with 54% of flights leaving in that window. Evening departures account for 31%, afternoon flights for 8%, and night flights for 7%.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pike Place Market, Pier 66 and Lumen Field. These are among the most viewed places in Seattle on KAYAK.

  • How long is a flight from Boise to Seattle?

    A nonstop flight from Boise to Seattle takes 1h 43m, covering 398 miles.

  • What are the earliest and latest flights from Boise to Seattle?

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

    • Earliest: departs at 6:00 am and lands at 7:43 am
    • Latest: departs at 8:59 pm and lands at 10:42 pm.

    The flight takes about 1h 43m.

  • How expensive are last-minute Boise to Seattle flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 132% above the route average of $219. Book 8 weeks before departure for the lowest fares.

  • Do I need a passport to fly from Boise to Seattle?

    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.

  • Have flight prices from Boise to Seattle changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $183 to $943. That means the highest observed fare was about 5x higher than the lowest one.

  • How are flight prices from Boise to Seattle looking right now?

    One-way fares from Boise to Seattle are currently lower than usual. Average one-way flight prices are about $118, which is 44% below the typical average for this route.

  • How do delay rates compare for morning and evening flights from Boise to Seattle?

    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.

  • How much time can I save by choosing a different layover airport from Boise to Seattle?

    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).

  • What is the time difference between Boise and Seattle?

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

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    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
    · Dollar

  • How much should I expect to pay for a Boise to Seattle flight?

    Round-trip flights from Boise to Seattle range from $152 to $313, with an average of $219 over the past 12 months. Anything below $152 counts as a good deal.

  • Which airlines offer Wi-Fi on Boise to Seattle flights?

    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.

Your guide to booking Boise to Seattle flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Saturday departure instead of Tuesday. On this route, Saturday flights average $203 - about $94 less than Tuesday (32% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 8 weeks before you fly. On this route, that window historically saves about 70% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Boise to Seattle trip for January. Fares historically average $139 round-trip in that month - typically $193 less than the most expensive month, which is June (based on the last 12 months).
  • If arriving on time is high on your priority list, Delta is the strongest pick on this route. 92% of Delta flights from Boise to Seattle arrived on time in the past 3 months, slightly above the route's average on-time arrival rate of 88%. When flights on this route do arrive late, the average delay is 1 hour 56 minutes, so choosing a carrier with strong on-time performance can make a difference on tight schedules.
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.
    - Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport
    - Coast Gateway Hotel
    - Seattle Airport Marriott
  • Do you have some last-minute business that you need to handle before your flight to Seattle? Head to the business center at Boise Airport (BOI), on the second floor of the main terminal building. Fax and photocopying services and computers with internet access are available at the business center.
  • Pets are welcome at BOI. However, TSA requires all pets to remain within their crates while traveling through the airport. BOI has provided a pet relief area outside the west exit around baggage claim and an indoor relief area just after the security screening checkpoint.
  • You’re welcome to relax at the airline lounges at Seattle-Tacoma International Airport (SEA) after your flight. Alaska Airlines, Delta, and United Airlines have pay-at-the-door lounges, which you can access, and American Express card members can access the Centurion Lounge.
  • If you have some time to pass at SEA, check out the art or catch a live music performance at the airport. The Art Walk at SEA showcases most of the airport’s breathtaking collection, including sculptures, glasswork, painting, photography, and more. There are also daily live music performances at SEA under the Experience the City of Music program.
  • Shop all the essentials at SEA duty-free before leaving the airport. You’ll find two duty-free locations at SEA in the Central Terminal. These are the Gate A and Gate S locations, with the latter open 24/7.

Prefer to fly direct from Boise to Seattle?

 
Find which airlines fly direct from Boise Air Term. Gowen Fld Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Boise Air Term. Gowen Fld to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

Alaska Airlines,Delta

See more direct flights

Direct returns

Seattle/Tacoma Intl to Boise Air Term. Gowen Fld

Monday

Alaska Airlines,Delta

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

Alaska Airlines,Delta

See more direct flights

Everything you need to know for your flight from Boise to Seattle

Information on your arrival and departure airports