$959 Cheap Flights from Iguazu (IGR) to St. Louis (STL)

View $959 flight on Fri, Mar 27, 2026Opens in a new window

Popular airlines from Iguazu (IGR-Cataratas del Iguazu Intl.) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Iguazu to St. Louis (IGR-STL)

Prices were available within the past 7 days and start at $959 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $959 or cheap return flight from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for is a great way to save, as it's the cheapest month for flights between IGR and STL. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from IGR to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IGR to STL?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL)?
To touch down at Lambert-St. Louis Intl. Airport (STL) on schedule, opt for a flight that leaves Cataratas del Iguazu Intl. Airport (IGR) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from IGR to STL just before your journey is typically more expensive. But if there's some wiggle room with your itinerary, you could score a cheap last-minute fare.
Is it cheaper to book an IGR to STL flight and hotel package?
You'll typically save money by booking an IGR to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. After selecting your preferred flights and accommodations, you can add extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Cataratas del Iguazu Intl. Airport (IGR) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you can reschedule or cancel your IGR to STL flight. However, there may be additional charges, especially if your booking was made more than 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
Cataratas del Iguazu Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
5022 mi

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Iguazu to St. Louis Flights

The cheapest times to fly from Iguazu to St. Louis

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

 

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

Sunday is one of the best days to book for cheap flights from Iguazu to St. Louis: 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 Iguazu to St. Louis

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 Iguazu to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $959 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 Iguazu to St. Louis 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 Iguazu to St. Louis 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.

 

Iguazu to St. Louis Flights

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