$883 Cheap Flights from Seattle (SEA) to Unalaska (DUT)

View $883 flight on Wed, Dec 3, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Unalaska, AK (DUT)

Cheap Flights from Seattle to Unalaska (SEA-DUT)

Prices were available within the past 7 days and start at $883 for one-way flights and $1,726 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Dec 21 - Sun, Jan 4
SEA
Seattle
DUT
Unalaska
$1,726 Roundtrip, found 7 hours ago
$1,726
Roundtrip
found 7 hours ago
Select Delta flight, departing Sun, Dec 21 from Seattle to Unalaska, returning Sun, Jan 4, priced at $1,726 found 7 hours ago
Delta
Sat, Dec 20 - Sun, Jan 4
SEA
Seattle
DUT
Unalaska
$1,742 Roundtrip, found 7 hours ago
$1,742
Roundtrip
found 7 hours ago
Select Delta flight, departing Sat, Dec 20 from Seattle to Unalaska, returning Sun, Jan 4, priced at $1,742 found 7 hours ago
Alaska Airlines
Thu, Dec 4 - Thu, Dec 11
SEA
Seattle
DUT
Unalaska
$1,744 Roundtrip, found 1 day ago
$1,744
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Seattle to Unalaska, returning Thu, Dec 11, priced at $1,744 found 1 day ago
Alaska Airlines
Thu, Dec 25 - Mon, Jan 5
SEA
Seattle
DUT
Unalaska
$1,747 Roundtrip, found 7 hours ago
$1,747
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Thu, Dec 25 from Seattle to Unalaska, returning Mon, Jan 5, priced at $1,747 found 7 hours ago
Delta
Wed, Dec 3 - Sat, Dec 20
SEA
Seattle
DUT
Unalaska
$1,755 Roundtrip, found 7 hours ago
$1,755
Roundtrip
found 7 hours ago
Select Delta flight, departing Wed, Dec 3 from Seattle to Unalaska, returning Sat, Dec 20, priced at $1,755 found 7 hours ago
Alaska Airlines
Wed, Dec 17 - Thu, Jan 1
SEA
Seattle
DUT
Unalaska
$1,762 Roundtrip, found 7 hours ago
$1,762
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Wed, Dec 17 from Seattle to Unalaska, returning Thu, Jan 1, priced at $1,762 found 7 hours ago
Alaska Airlines
Fri, Dec 26 - Mon, Dec 29
SEA
Seattle
DUT
Unalaska
$1,764 Roundtrip, found 1 day ago
$1,764
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Dec 26 from Seattle to Unalaska, returning Mon, Dec 29, priced at $1,764 found 1 day ago
Alaska Airlines
Thu, Jan 1 - Sun, Jan 11
SEA
Seattle
DUT
Unalaska
$1,767 Roundtrip, found 7 hours ago
$1,767
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Thu, Jan 1 from Seattle to Unalaska, returning Sun, Jan 11, priced at $1,767 found 7 hours ago
Delta
Sat, Dec 13 - Mon, Dec 29
SEA
Seattle
DUT
Unalaska
$1,772 Roundtrip, found 7 hours ago
$1,772
Roundtrip
found 7 hours ago
Select Delta flight, departing Sat, Dec 13 from Seattle to Unalaska, returning Mon, Dec 29, priced at $1,772 found 7 hours ago
Alaska Airlines
Thu, Nov 27 - Thu, Dec 4
SEA
Seattle
DUT
Unalaska
$1,773 Roundtrip, found 3 days ago
$1,773
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Nov 27 from Seattle to Unalaska, returning Thu, Dec 4, priced at $1,773 found 3 days ago

Alternative airports near Unalaska

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Unalaska, AK DUT. Cheapest and Closest option available. Average driving time to city center is 7 minutes. Flights from $1,883
DUT
Unalaska, AK
CheapestClosest
Average driving time to city center7 min
Flights from $1,883

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT) cost?
Secure a cheap one-way flight from $883 or cheap return flight from $1,726 from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT)?
The cheapest month to fly from SEA to DUT is December, when there's less demand. Off-peak months are usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SEA to DUT flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT)?
You'll have to take a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from SEA to DUT?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on a number of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT) route, fly before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT) last-minute?
Booking your flight from SEA to DUT right before your trip is typically more expensive. However, if you're flexible with your departure times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a SEA to DUT flight and hotel package?
Compared with arranging flights and hotels separately, booking a SEA to DUT flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place will take the hassle out of travel planning. Simply pick your flights and select from our extensive range of stays, then personalize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Unalaska Airport (DUT)?
In most instances, you can cancel or modify your SEA to DUT flight. However, there may be additional fees, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like more information, visit our Customer Service portal.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Unalaska
Roundtrip price
$1,725
Distance
1953 mi

Book with confidence

Seattle to Unalaska Flights

The cheapest times to fly from Seattle to Unalaska

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Unalaska are during the month of December. You can find some of the cheapest flights from Seattle to Unalaska with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Unalaska

Sunday is one of the best days to book for cheap flights from Seattle to Unalaska: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Unalaska

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Unalaska in 2025. You can also book with separate airlines for your outbound and return journeys, from $883 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Unalaska flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Unalaska airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Unalaska Flights

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*Available to One Key members.