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NT$4,230 Cheap Flights from Seattle (SEA) to Boise (BOI)

View NT$4,230 flight on Sat, 2026/12/12Opens in a new window

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

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Cheap Flights from Seattle to Boise (SEA-BOI)

Prices were available within the past 7 days and start at NT$4,230 for one-way flights and NT$6,558 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Dec 5 - Sat, Dec 12
SEA
Seattle
BOI
Boise
NT$6,558 Roundtrip, found 2 days ago
NT$6,558
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Dec 5 from Seattle to Boise, returning Sat, Dec 12, priced at NT$6,558 found 2 days ago
United
Sat, Dec 5 - Sat, Dec 12
SEA
Seattle
BOI
Boise
NT$9,247 Roundtrip, found 2 days ago
NT$9,247
Roundtrip
found 2 days ago
Select United flight, departing Sat, Dec 5 from Seattle to Boise, returning Sat, Dec 12, priced at NT$9,247 found 2 days ago
Delta
Fri, Oct 16 - Thu, Oct 29
SEA
Seattle
BOI
Boise
NT$9,788 Roundtrip, found 5 days ago
NT$9,788
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Oct 16 from Seattle to Boise, returning Thu, Oct 29, priced at NT$9,788 found 5 days ago
United
Sat, Dec 5 - Sat, Dec 12
SEA
Seattle
BOI
Boise
NT$10,033 Roundtrip, found 2 days ago
NT$10,033
Roundtrip
found 2 days ago
Select United flight, departing Sat, Dec 5 from Seattle to Boise, returning Sat, Dec 12, priced at NT$10,033 found 2 days ago
Delta
Sat, Dec 5 - Sat, Dec 12
SEA
Seattle
BOI
Boise
NT$10,198 Roundtrip, found 2 days ago
NT$10,198
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Dec 5 from Seattle to Boise, returning Sat, Dec 12, priced at NT$10,198 found 2 days ago
United
Sat, Dec 5 - Sat, Dec 12
SEA
Seattle
BOI
Boise
NT$10,984 Roundtrip, found 2 days ago
NT$10,984
Roundtrip
found 2 days ago
Select United flight, departing Sat, Dec 5 from Seattle to Boise, returning Sat, Dec 12, priced at NT$10,984 found 2 days ago
United
Sat, Dec 5 - Sat, Dec 12
SEA
Seattle
BOI
Boise
NT$11,148 Roundtrip, found 2 days ago
NT$11,148
Roundtrip
found 2 days ago
Select United flight, departing Sat, Dec 5 from Seattle to Boise, returning Sat, Dec 12, priced at NT$11,148 found 2 days ago
Delta
Sun, Jan 3 - Sun, Jan 10
SEA
Seattle
BOI
Boise
NT$11,495 Roundtrip, found 3 days ago
NT$11,495
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Jan 3 from Seattle to Boise, returning Sun, Jan 10, priced at NT$11,495 found 3 days ago
Delta
Sat, Oct 24 - Sat, Oct 31
SEA
Seattle
BOI
Boise
NT$11,664 Roundtrip, found 4 days ago
NT$11,664
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Oct 24 from Seattle to Boise, returning Sat, Oct 31, priced at NT$11,664 found 4 days ago
American Airlines
Fri, Dec 25 - Tue, Dec 29
SEA
Seattle
BOI
Boise
NT$25,149 Roundtrip, found 6 days ago
NT$25,149
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Dec 25 from Seattle to Boise, returning Tue, Dec 29, priced at NT$25,149 found 6 days ago

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

October is typically the cheapest month to fly

From NT$6,179 - NT$7,500 per traveler.

Frequently asked questions

How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to BOI?
Pack your bags, because round-trip flights between Seattle - Tacoma Intl. Airport (SEA) and BOI start from NT$6,558. That's based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book today to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to BOI?
The majority of flights can be canceled online, but whether you incur a fee depends on your airline. If you do need to cancel your break, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to BOI that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Boise Airport (BOI) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to BOI?
It's only 640 kilometers between SEA and Boise Airport (BOI). Chances are you'll spend more time traveling to and from the airport than you will actually flying!
Which airlines fly direct from Sea-Tac Airport to Boise Airport (BOI)?
There are several airlines that fly directly from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI). Alaska Airlines (AS) is a popular option, offering 321 flights every month. Another airline operating on this route is Delta Air Lines (DL). You'll have 182 flights each month to take your pick of.
Are Seattle - Tacoma Intl. Airport (SEA) to BOI flight tickets cheaper when they're purchased at the last minute?
Flight prices go up and down like a yo-yo, so there are no guarantees. While last-minute deals between SEA and Boise Airport are possible, it also makes sense to monitor prices well before you fly. In fact, some air carriers publish their prices up to 12 months ahead of the departure date. Expedia is continuously updating the biggest airfare bargains around, so check back often and be ready to pounce when the price is low.

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