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Cheap Flights from Boise (BOI) to Seattle (SEA)

View AU$157 flight on Sun, 16 Aug 2026Opens in a new window

Flight 1

Popular airlines from Boise Airport (BOI) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Boise (BOI) to Seattle (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$775 Return, found 1 day ago
AU$775
Return
found 1 day ago
Select Delta flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$775 found 1 day ago
Alaska Airlines
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$826 Return, found 1 day ago
AU$826
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$826 found 1 day ago
United
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$832 Return, found 1 day ago
AU$832
Return
found 1 day ago
Select United flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$832 found 1 day ago
United
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$846 Return, found 1 day ago
AU$846
Return
found 1 day ago
Select United flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$846 found 1 day ago
Delta
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$861 Return, found 1 day ago
AU$861
Return
found 1 day ago
Select Delta flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$861 found 1 day ago
United
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$870 Return, found 1 day ago
AU$870
Return
found 1 day ago
Select United flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$870 found 1 day ago
Alaska Airlines
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$875 Return, found 1 day ago
AU$875
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$875 found 1 day ago
United
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$884 Return, found 1 day ago
AU$884
Return
found 1 day ago
Select United flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$884 found 1 day ago
Alaska Airlines
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$898 Return, found 1 day ago
AU$898
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$898 found 1 day ago
American Airlines
Thu, 16 July - Wed, 22 July
BOI
Boise
SEA
Seattle
AU$1,572 Return, found 1 day ago
AU$1,572
Return
found 1 day ago
Select American Airlines flight, departing Thu, 16 July from Boise to Seattle, returning Wed, 22 July, priced at AU$1,572 found 1 day ago

Find the cheapest month to fly from Boise (BOI) to Seattle (SEA)

February is typically the cheapest month to fly

From AU$113 - AU$171 per traveller.

Frequently asked questions

How much does a flight from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from AU$157 and cheap return flights from AU$775 BOI to SEA with Expedia. One-way flights typically cost between AU$84 and AU$279. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when BOI to SEA ticket fares go up or down.
What is the cheapest month to fly from Boise, ID (BOI) to Seattle, WA (SEA)?
The cheapest months to fly from Boise, ID (BOI) to Seattle, WA (SEA) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are 5 airlines offering direct flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Here are some of the top carriers:
  • Delta operates 54 direct flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) every week.
  • Finnair operates 14 direct flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) every week.
  • Condor operates 14 direct flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) every week.
  • Qatar Airways operates 10 direct flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) every week.
  • British Airways operates 7 direct flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) every week.
How do I find cheap flights from Boise, ID (BOI) to Seattle, WA (SEA)?
To find a cheap flight from Boise, ID (BOI) to Seattle, WA (SEA), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will differ from traveler to traveler. If you like to fly early, Delta offers early morning flights. If price is the most important factor, Delta typically offers the lowest fares. Alaska Airlines offers the most daily flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Boise, ID (BOI) to Seattle, WA (SEA)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll find approximately 8 nonstop flights per day from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.). For even more choices, look at flights that include layovers; there are around 35 connecting flights per day. Some common connection points include Denver Intl. (DEN), Portland Intl. (PDX), and San Francisco Intl. (SFO).
What is the earliest flight from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs around 5:00 AM. This service is offered by Alaska Airlines. This is a seasonal service active in March. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) on a Friday, with around 61 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, Southwest Airlines, and United. Friday offers notably more flight options compared to other days of the week, making it a great day to travel if you're looking for flexibility.
What are the most popular departure times for flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the early morning, from 6am to 9am. Many major carriers, including Alaska Airlines, Delta and Southwest Airlines, offer flights during this window. Many travellers prefer this because it allows for an early start to their day in Seattle.
How long does it take to fly from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A non-stop flight from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically takes around 1 hour 48 minutes. This route covers a distance of approximately 641 kilometres. If you opt for a flight with one stop, your travel time will be longer, usually around 7 hours 30 minutes. Flights with two or more stops generally take about 9 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Yes, you can fly business class or first class between BOI and SEA. You can fly business class with Delta.First class cabins are available on:
  • Alaska Airlines
  • United
  • Delta
  • Hawaiian Airlines
  • American Airlines

How do I earn miles on a Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle, WA (SEA) from Boise, ID (BOI)?
If you're planning to travel to Seattle from BOI, you can fly directly into Seattle - Tacoma Intl. (SEA). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Portland Intl. (PDX), or Harry Reid International Airport (LAS) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Boise, ID (BOI) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boise, ID (BOI) to Seattle, WA (SEA)?
If you booked your Boise, ID (BOI) to Seattle, WA (SEA) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

0
Origin airport
Boise
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
AU$775
Distance
636 km

Book with confidence

Your quick guide to flights from Boise to Seattle

Pick up great flights from Boise to Seattle

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Boise to Seattle. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Boise to Seattle that take around hours.

Find cheap flights from Boise to Seattle

From the great flight deals with prices currently ranging from AU$775 to AU$1,572, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Boise to Seattle around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Seattle is normally in July.

Reasons to book your flight from Boise to Seattle with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Boise to Seattle across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Seattle right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Boise to Seattle

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