$518 Cheap Flights from Seattle (SEA) to Cusco (CUZ)

View $518 flight on Tue, Nov 11, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Alejandro Velasco Astete Intl. Airport (CUZ)

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Cheap Flights from Seattle to Cusco (SEA-CUZ)

Prices were available within the past 7 days and start at $518 for one-way flights and $946 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Jan 20 - Tue, Jan 27
SEA
Seattle
CUZ
Cusco
$946 Roundtrip, found 5 days ago
$946
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jan 20 from Seattle to Cusco, returning Tue, Jan 27, priced at $946 found 5 days ago
United
Tue, Jan 20 - Tue, Jan 27
SEA
Seattle
CUZ
Cusco
$963 Roundtrip, found 5 days ago
$963
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jan 20 from Seattle to Cusco, returning Tue, Jan 27, priced at $963 found 5 days ago
United
Wed, May 13 - Wed, May 27
SEA
Seattle
CUZ
Cusco
$966 Roundtrip, found 2 days ago
$966
Roundtrip
found 2 days ago
Select United flight, departing Wed, May 13 from Seattle to Cusco, returning Wed, May 27, priced at $966 found 2 days ago
United
Wed, Nov 19 - Mon, Dec 8
SEA
Seattle
CUZ
Cusco
$972 Roundtrip, found 10 hours ago
$972
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Nov 19 from Seattle to Cusco, returning Mon, Dec 8, priced at $972 found 10 hours ago
United
Thu, Oct 23 - Sun, Oct 26
SEA
Seattle
CUZ
Cusco
$987 Roundtrip, found 4 days ago
$987
Roundtrip
found 4 days ago
Select United flight, departing Thu, Oct 23 from Seattle to Cusco, returning Sun, Oct 26, priced at $987 found 4 days ago
United
Thu, Oct 23 - Sun, Oct 26
SEA
Seattle
CUZ
Cusco
$991 Roundtrip, found 4 days ago
$991
Roundtrip
found 4 days ago
Select United flight, departing Thu, Oct 23 from Seattle to Cusco, returning Sun, Oct 26, priced at $991 found 4 days ago
Delta
Mon, Nov 10 - Sun, Nov 23
SEA
Seattle
CUZ
Cusco
$1,048 Roundtrip, found 8 hours ago
$1,048
Roundtrip
found 8 hours ago
Select Delta flight, departing Mon, Nov 10 from Seattle to Cusco, returning Sun, Nov 23, priced at $1,048 found 8 hours ago
Alaska Airlines
Mon, Nov 3 - Thu, Nov 6
SEA
Seattle
CUZ
Cusco
$1,060 Roundtrip, found 5 days ago
$1,060
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Mon, Nov 3 from Seattle to Cusco, returning Thu, Nov 6, priced at $1,060 found 5 days ago
LATAM Airlines Group
Mon, Oct 27 - Mon, Nov 3
SEA
Seattle
CUZ
Cusco
$1,144 Roundtrip, found 9 hours ago
$1,144
Roundtrip
found 9 hours ago
Select LATAM Airlines Group flight, departing Mon, Oct 27 from Seattle to Cusco, returning Mon, Nov 3, priced at $1,144 found 9 hours ago
American Airlines
Fri, Nov 7 - Mon, Nov 17
SEA
Seattle
CUZ
Cusco
$1,198 Roundtrip, found 10 hours ago
$1,198
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Fri, Nov 7 from Seattle to Cusco, returning Mon, Nov 17, priced at $1,198 found 10 hours ago

Find the cheapest month to fly from Seattle (SEA) to Cusco (CUZ)

March is typically the cheapest month to fly

From $818 - $1,244 per traveler.

Graph displaying average flight prices per month

Alternative airports near Cusco

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

Select flight to Alejandro Velasco Astete Intl. CUZ. Cheapest and Closest option available. Average driving time to city center is 4 minutes. Flights from $1,452
CUZ
Alejandro Velasco Astete Intl.
CheapestClosest
Average driving time to city center4 min
Flights from $1,452
Flights from Seattle (SEA) to Cusco (CUZ)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Alejandro Velasco Astete Intl.
Airlines serving
American Airlines, Delta, LATAM Airlines Group, avianca
Roundtrip price
$945
Distance
5229 mi

Seattle to Cusco Flights

The cheapest times to fly from Seattle to Cusco

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 Cusco are during the month of January. You can find some of the cheapest flights from Seattle to Cusco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Cusco

Sunday is one of the best days to book for cheap flights from Seattle to Cusco: 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 Cusco

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 Cusco in 2025. You can also book with separate airlines for your outbound and return journeys, from $518 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 Cusco 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 Cusco 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.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Alejandro Velasco Astete Intl. Airport (CUZ) cost?
Discover the latest flight deals from SEA to CUZ by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to CUZ?
The cheapest flights from SEA to CUZ are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to CUZ?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to CUZ. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Alejandro Velasco Astete Intl. Airport (CUZ)?
You'll need to hop on a flight with a layover if you're traveling from Seattle - Tacoma Intl. Airport (SEA) to Alejandro Velasco Astete Intl. Airport (CUZ). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from SEA to CUZ?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can change based on the airline, season and other factors.*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 Alejandro Velasco Astete Intl. Airport (CUZ)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Alejandro Velasco Astete Intl. Airport (CUZ) route, aim to travel before 3 PM. Later flights are 22% more likely to be canceled.**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 Alejandro Velasco Astete Intl. Airport (CUZ) last-minute?
Booking your plane ticket from SEA to CUZ shortly before your getaway is usually more expensive. But if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a SEA to CUZ flight and hotel package?
Securing a SEA to CUZ flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our extensive range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Alejandro Velasco Astete Intl. Airport (CUZ)?
Generally, it's possible to reschedule or cancel your SEA to CUZ flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.