$437 Cheap Flights from St. Louis (STL) to Cusco (CUZ)

View $437 flight on Tue, May 19, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ)

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Cheap Flights from St. Louis to Cusco (STL-CUZ)

Prices were available within the past 7 days and start at $437 for one-way flights and $701 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Nov 27 - Mon, Dec 8
STL
St. Louis
CUZ
Cusco
$701 Roundtrip, found 3 days ago
$701
Roundtrip
found 3 days ago
Select United flight, departing Thu, Nov 27 from St. Louis to Cusco, returning Mon, Dec 8, priced at $701 found 3 days ago
United
Thu, Jan 15 - Thu, Feb 5
STL
St. Louis
CUZ
Cusco
$719 Roundtrip, found 3 days ago
$719
Roundtrip
found 3 days ago
Select United flight, departing Thu, Jan 15 from St. Louis to Cusco, returning Thu, Feb 5, priced at $719 found 3 days ago
United
Sat, Jan 24 - Thu, Feb 12
STL
St. Louis
CUZ
Cusco
$721 Roundtrip, found 3 days ago
$721
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jan 24 from St. Louis to Cusco, returning Thu, Feb 12, priced at $721 found 3 days ago
United
Tue, Mar 24 - Wed, Apr 8
STL
St. Louis
CUZ
Cusco
$726 Roundtrip, found 1 day ago
$726
Roundtrip
found 1 day ago
Select United flight, departing Tue, Mar 24 from St. Louis to Cusco, returning Wed, Apr 8, priced at $726 found 1 day ago
United
Thu, Nov 27 - Wed, Dec 10
STL
St. Louis
CUZ
Cusco
$726 Roundtrip, found 3 days ago
$726
Roundtrip
found 3 days ago
Select United flight, departing Thu, Nov 27 from St. Louis to Cusco, returning Wed, Dec 10, priced at $726 found 3 days ago
United
Fri, Nov 28 - Mon, Dec 8
STL
St. Louis
CUZ
Cusco
$730 Roundtrip, found 3 days ago
$730
Roundtrip
found 3 days ago
Select United flight, departing Fri, Nov 28 from St. Louis to Cusco, returning Mon, Dec 8, priced at $730 found 3 days ago
American Airlines
Wed, Mar 18 - Thu, Apr 2
STL
St. Louis
CUZ
Cusco
$936 Roundtrip, found 1 day ago
$936
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Mar 18 from St. Louis to Cusco, returning Thu, Apr 2, priced at $936 found 1 day ago
Delta
Wed, Mar 18 - Thu, Apr 9
STL
St. Louis
CUZ
Cusco
$958 Roundtrip, found 1 day ago
$958
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Mar 18 from St. Louis to Cusco, returning Thu, Apr 9, priced at $958 found 1 day ago
LATAM Airlines Group
Wed, Mar 18 - Sun, Mar 29
STL
St. Louis
CUZ
Cusco
$988 Roundtrip, found 1 day ago
$988
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Wed, Mar 18 from St. Louis to Cusco, returning Sun, Mar 29, priced at $988 found 1 day ago
avianca
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
CUZ
Cusco
$2,809 Roundtrip, found 5 days ago
$2,809
Roundtrip
found 5 days ago
Select avianca flight, departing Tue, Oct 28 from St. Louis to Cusco, returning Sat, Nov 1, priced at $2,809 found 5 days ago

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 $869
CUZ
Alejandro Velasco Astete Intl.
CheapestClosest
Average driving time to city center4 min
Flights from $869

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ) cost?
Lock in a cheap one-way flight from $437 or cheap return flight from $701 from Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ)?
Traveling in November may help you find better deals, as it's the cheapest month for flights between STL and CUZ. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest STL to CUZ flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to CUZ?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change depending 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 Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ) route, aim to fly before 3 PM. Later departures 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 Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ) last-minute?
Booking your ticket from STL to CUZ just before your getaway is typically more expensive. However, if you're flexible with your schedule, you could score a cheap last-minute fare.
Is it cheaper to book a STL to CUZ flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to CUZ flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place takes the hassle out of travel planning. Just secure your flights and select from our wide range of hotels, then personalize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Alejandro Velasco Astete Intl. Airport (CUZ)?
Typically, you can reschedule or cancel your STL to CUZ flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need more details, go to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Alejandro Velasco Astete Intl.
Airlines serving
American Airlines, Delta, LATAM Airlines Group
Roundtrip price
$701
Distance
3803 mi

Book with confidence

St. Louis to Cusco Flights

The cheapest times to fly from St. Louis 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 St. Louis to Cusco are during the month of November. You can find some of the cheapest flights from St. Louis to Cusco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Cusco

Sunday is one of the best days to book for cheap flights from St. Louis 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 St. Louis 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 St. Louis to Cusco in 2025. You can also book with separate airlines for your outbound and return journeys, from $437 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 St. Louis 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 St. Louis 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.

 

St. Louis to Cusco Flights

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