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$200+ Cheap flights from Waterloo, IA to St. Louis (ALO - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — STL
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$299
(American Airlines)

One-way from

$200
(American Airlines)
From Waterloo to Lambert-St Louis
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One-way flight 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 July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 10/113:21 pmALO - STL
1 stop5h 05mAmerican Airlines
Thu 10/168:42 amSTL - ALO
1 stop6h 09mAmerican Airlines
Deal found 7/2$219

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 July 3, 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

Tue 7/15

6:00 am-4:00 pm

2 stops10h 00m

Lambert-St Louis

Sat 7/19

8:43 am-2:36 pm

1 stop5h 53m

$299

WaterlooSt. Louis

ALO - STL

ALOSTL

Waterloo

Fri 8/15

3:14 pm-8:18 pm

1 stop5h 04m

$200

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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, August is the cheapest month in which you can book a flight from Waterloo, Iowa to St. Louis (average of $311). Flying from Waterloo, Iowa to St. Louis in March is currently the most expensive (average of $356). 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.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated July 3, 2025.
Read through reviews of airlines operating flights from Waterloo to St. Louis, such as American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Food

6.5

Comfort

7.2

Boarding

7.5

Entertainment

6.9

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Andrew,May 2025

LAX - MIA

2 hour delay. Discovered an engine problem late, we boarded the plane and they asked us to come off. To add insult to injury nothing was given to passengers to make amends. No free drink. No extra food or snacks. No free WiFi. Gimme a break
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Food

6.5

Comfort

7.2

Boarding

7.5

Entertainment

6.9

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Andrew,May 2025

LAX - MIA

2 hour delay. Discovered an engine problem late, we boarded the plane and they asked us to come off. To add insult to injury nothing was given to passengers to make amends. No free drink. No extra food or snacks. No free WiFi. Gimme a break

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.

  • 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, August is the cheapest month in which you can book a flight from Waterloo, Iowa to St. Louis (average of $311). Flying from Waterloo, Iowa to St. Louis in March is currently the most expensive (average of $356). 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 Waterloo?

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

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