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

View NT$4,230 flight on Sat, 2026/12/5Opens in a new window

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

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Cheap Flights from Boise to Seattle (BOI-SEA)

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
BOI
Boise
SEA
Seattle
NT$6,558 Roundtrip, found 2 days ago
NT$6,558
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Dec 5 from Boise to Seattle, returning Sat, Dec 12, priced at NT$6,558 found 2 days ago
Delta
Thu, Oct 22 - Wed, Oct 28
BOI
Boise
SEA
Seattle
NT$7,555 Roundtrip, found 5 days ago
NT$7,555
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Oct 22 from Boise to Seattle, returning Wed, Oct 28, priced at NT$7,555 found 5 days ago
Delta
Sat, Dec 5 - Sat, Dec 12
BOI
Boise
SEA
Seattle
NT$7,699 Roundtrip, found 2 days ago
NT$7,699
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Dec 5 from Boise to Seattle, returning Sat, Dec 12, priced at NT$7,699 found 2 days ago
Delta
Fri, Nov 6 - Sun, Nov 8
BOI
Boise
SEA
Seattle
NT$7,874 Roundtrip, found 5 days ago
NT$7,874
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 6 from Boise to Seattle, returning Sun, Nov 8, priced at NT$7,874 found 5 days ago
Delta
Thu, Oct 22 - Wed, Oct 28
BOI
Boise
SEA
Seattle
NT$8,385 Roundtrip, found 5 days ago
NT$8,385
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Oct 22 from Boise to Seattle, returning Wed, Oct 28, priced at NT$8,385 found 5 days ago
Delta
Fri, Nov 6 - Sun, Nov 8
BOI
Boise
SEA
Seattle
NT$8,703 Roundtrip, found 5 days ago
NT$8,703
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 6 from Boise to Seattle, returning Sun, Nov 8, priced at NT$8,703 found 5 days ago
United
Sat, Dec 5 - Sat, Dec 12
BOI
Boise
SEA
Seattle
NT$9,247 Roundtrip, found 2 days ago
NT$9,247
Roundtrip
found 2 days ago
Select United flight, departing Sat, Dec 5 from Boise to Seattle, returning Sat, Dec 12, priced at NT$9,247 found 2 days ago
Delta
Thu, Oct 22 - Wed, Oct 28
BOI
Boise
SEA
Seattle
NT$9,309 Roundtrip, found 5 days ago
NT$9,309
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Oct 22 from Boise to Seattle, returning Wed, Oct 28, priced at NT$9,309 found 5 days ago
Delta
Sat, Dec 5 - Sat, Dec 12
BOI
Boise
SEA
Seattle
NT$9,565 Roundtrip, found 2 days ago
NT$9,565
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Dec 5 from Boise to Seattle, returning Sat, Dec 12, priced at NT$9,565 found 2 days ago
American Airlines
Sat, Dec 5 - Sat, Dec 12
BOI
Boise
SEA
Seattle
NT$22,587 Roundtrip, found 2 days ago
NT$22,587
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Dec 5 from Boise to Seattle, returning Sat, Dec 12, priced at NT$22,587 found 2 days ago

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

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 Boise Airport (BOI) to Sea-Tac Airport?
The lowest price advertised for a round-trip journey from Boise Airport to Seattle - Tacoma Intl. Airport (SEA) is NT$6,558. But you better move fast. This figure is taken from fares quoted within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Boise Airport to Seattle - Tacoma Intl. Airport (SEA)?
We get that your situation can change unexpectedly, so we've made it as simple as possible for you to cancel your trip online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from BOI to SEA 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 BOI to SEA flights, you'll see a "no change fees" filter for you to select.
How far is the flight from BOI to SEA?
The distance from Boise Airport (BOI) (BOI) to SEA (SEA) is 640 kilometers. You'll be walking down the air bridge and collecting your bags from the carousel in no time.
Which airlines fly direct from Boise Airport (BOI) to Sea-Tac Airport?
There are a few airlines that fly directly from Boise Airport (BOI) to Sea-Tac Airport. Alaska Airlines (AS) is a great choice, offering 321 flights each month. Operating 182 flights each month on this route, Delta Air Lines (DL) is another traveler favorite.
Are Boise Airport to SEA 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 BOI and SEA are of course possible, it also makes sense to keep a close eye on prices well before you fly. In fact, some carriers advertise their prices up to a year prior to the departure date. Expedia is continuously updating the biggest airfare bargains around, so check back often and be ready to grab your seat when the price dips.

Travel information

0
Origin airport
Boise
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
NT$6,558
Distance
636 km

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