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$334+ Cheap flights from Waterloo, IA to St. Louis (ALO - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — STL
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheap flight deals from Waterloo to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Waterloo (ALO) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$334
(American Airlines)
Provider with most accurate pricing for Waterloo-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Waterloo-Lambert-St Louis flights.
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From Waterloo to Lambert-St Louis
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Find flight deals from Waterloo to St. Louis

Cheapest flights from Waterloo to St. Louis
Explore the most affordable flight options available from Waterloo to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 20, 2025.

This American Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/33:27 pmALO - STL
1 stop4h 57mAmerican Airlines
Wed 12/101:43 pmSTL - ALO
1 stop6h 21mAmerican Airlines
Deal found 10/19$334
This American Airlines deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:00 amALO - STL
1 stop5h 42mAmerican Airlines
Sat 11/88:39 amSTL - ALO
1 stop6h 19mAmerican Airlines
Deal found 10/20$432
This American Airlines deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/273:25 pmALO - STL
1 stop5h 01mAmerican Airlines
Wed 10/299:58 amSTL - ALO
1 stop4h 57mAmerican Airlines
Deal found 10/20$607

Cheapflights Fare Finder

 
Customize your flight search to find flights from Waterloo to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 20, 2025.
Use the filters below to find and compare flights from Waterloo to St. Louis that are best for you.

Fly from

Waterloo

Fly to

St. Louis

Route

Depart

Return

Price

WaterlooSt. Louis

ALO - STL

ALOSTL

Waterloo

Wed 12/3

3:27 pm-8:24 pm

1 stop4h 57m

Lambert-St Louis

Wed 12/10

1:43 pm-8:04 pm

1 stop6h 21m

$334

WaterlooSt. Louis

ALO - STL

ALOSTL

Waterloo

Tue 11/4

6:00 am-11:42 am

1 stop5h 42m

Lambert-St Louis

Sat 11/8

8:39 am-2:58 pm

1 stop6h 19m

$432

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Compare providers for flights from Waterloo to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Waterloo to St. Louis in October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Waterloo, Iowa-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Waterloo, Iowa-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Waterloo, Iowa-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Waterloo, Iowa-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Waterloo, Iowa-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Waterloo to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Waterloo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Waterloo to St. Louis

What is the cheapest month to book a flight from Waterloo, Iowa to St. Louis?

Currently, October is the cheapest month in which you can book a flight from Waterloo, Iowa to St. Louis (average of $93). Flying from Waterloo, Iowa to St. Louis in December is currently the most expensive (average of $298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Waterloo to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Waterloo, Iowa to St. Louis?

    A quick flight from Waterloo, Iowa to St. Louis can take about 4h 57m. American Airlines provides one of the quickest options available for as low as $334. The distance between Waterloo, Iowa and St. Louis is about 283 mi.

  • Can I find deals for flights from Waterloo to St. Louis that include hotel bookings?

    Yes. In addition to deals on Waterloo to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Waterloo to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Waterloo to St. Louis.

  • Can I find deals for business class flights from Waterloo to St. Louis?

    Yes. Cheapflights offers flight deals from Waterloo to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Waterloo, Iowa to St. Louis?

    Currently, October is the cheapest month in which you can book a flight from Waterloo, Iowa to St. Louis (average of $93). Flying from Waterloo, Iowa to St. Louis in December is currently the most expensive (average of $298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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