$321 Cheap Flights from Aguascalientes (AGU) to St. Louis (STL)

View $321 flight on Tue, Nov 4, 2025Opens in a new window

Popular airlines from Aguascalientes International Airport (AGU) to St. Louis Lambert Intl. Airport (STL)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Aguascalientes to St. Louis (AGU-STL)

Prices were available within the past 7 days and start at $321 for one-way flights and $554 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Oct 30 - Fri, Nov 7
AGU
Aguascalientes
STL
St. Louis
$554 Roundtrip, found 6 days ago
$554
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 30 from Aguascalientes to St. Louis, returning Fri, Nov 7, priced at $554 found 6 days ago
United
Thu, Oct 30 - Fri, Nov 7
AGU
Aguascalientes
STL
St. Louis
$565 Roundtrip, found 6 days ago
$565
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 30 from Aguascalientes to St. Louis, returning Fri, Nov 7, priced at $565 found 6 days ago
United
Thu, Oct 30 - Fri, Nov 7
AGU
Aguascalientes
STL
St. Louis
$576 Roundtrip, found 6 days ago
$576
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 30 from Aguascalientes to St. Louis, returning Fri, Nov 7, priced at $576 found 6 days ago
American Airlines
Sat, Oct 25 - Tue, Nov 4
AGU
Aguascalientes
STL
St. Louis
$594 Roundtrip, found 20 hours ago
$594
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Sat, Oct 25 from Aguascalientes to St. Louis, returning Tue, Nov 4, priced at $594 found 20 hours ago
United
Sat, Oct 25 - Tue, Nov 4
AGU
Aguascalientes
STL
St. Louis
$599 Roundtrip, found 20 hours ago
$599
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Oct 25 from Aguascalientes to St. Louis, returning Tue, Nov 4, priced at $599 found 20 hours ago
United
Thu, Oct 30 - Fri, Nov 7
AGU
Aguascalientes
STL
St. Louis
$599 Roundtrip, found 6 days ago
$599
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 30 from Aguascalientes to St. Louis, returning Fri, Nov 7, priced at $599 found 6 days ago
American Airlines
Sat, Oct 25 - Tue, Nov 4
AGU
Aguascalientes
STL
St. Louis
$604 Roundtrip, found 20 hours ago
$604
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Sat, Oct 25 from Aguascalientes to St. Louis, returning Tue, Nov 4, priced at $604 found 20 hours ago
United
Sat, Oct 25 - Tue, Nov 4
AGU
Aguascalientes
STL
St. Louis
$605 Roundtrip, found 20 hours ago
$605
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Oct 25 from Aguascalientes to St. Louis, returning Tue, Nov 4, priced at $605 found 20 hours ago
Delta
Thu, Oct 30 - Fri, Nov 7
AGU
Aguascalientes
STL
St. Louis
$945 Roundtrip, found 6 days ago
$945
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Oct 30 from Aguascalientes to St. Louis, returning Fri, Nov 7, priced at $945 found 6 days ago
Aeromexico
Sat, Oct 25 - Tue, Nov 4
AGU
Aguascalientes
STL
St. Louis
$1,105 Roundtrip, found 20 hours ago
$1,105
Roundtrip
found 20 hours ago
Select Aeromexico flight, departing Sat, Oct 25 from Aguascalientes to St. Louis, returning Tue, Nov 4, priced at $1,105 found 20 hours ago

Frequently asked questions

How much does a flight from Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $321 or cheap return flight from $554 from Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL) 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 Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from AGU to STL is October, when demand is low. Off-peak season is often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from AGU to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights available from Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from AGU to STL?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary 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 Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL) 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 Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until just before your departure to book a ticket from AGU to STL often results in higher prices. While you might find some last-minute offers, there's no guarantee. Be flexible with your travel plans for the best chance of getting a bargain.
Is it cheaper to book an AGU to STL flight and hotel package?
Booking an AGU to STL flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our wide range of accommodations and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Licenciado Jesus Teran Peredo Intl. Airport (AGU) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you're able to reschedule or cancel your AGU to STL flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more information, head to our Customer Service portal.

Travel information

Origin airport
Licenciado Jesus Teran Peredo Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Aeromexico, American Airlines, United
Roundtrip price
$553
Distance
1373 mi

Book with confidence

Aguascalientes to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Aguascalientes 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 Aguascalientes 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 Aguascalientes to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $321 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 Aguascalientes 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 Aguascalientes 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.

 

Aguascalientes to St. Louis Flights

Explore a world of travel with Expedia

*Available to One Key members.