$308 Cheap Flights from Denver (DEN) to Waterloo (ALO)

View $308 flight on Thu, Jul 23, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Waterloo, IA (ALO-Waterloo Regional)

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Cheap Flights from Denver to Waterloo (DEN-ALO)

Prices were available within the past 7 days and start at $308 for one-way flights and $437 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Jul 23 - Mon, Jul 27
DEN
Denver
ALO
Waterloo
$437 Roundtrip, found 2 hours ago
$437
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Thu, Jul 23 from Denver to Waterloo, returning Mon, Jul 27, priced at $437 found 2 hours ago
American Airlines
Thu, Jul 23 - Mon, Jul 27
DEN
Denver
ALO
Waterloo
$447 Roundtrip, found 2 hours ago
$447
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Thu, Jul 23 from Denver to Waterloo, returning Mon, Jul 27, priced at $447 found 2 hours ago
American Airlines
Thu, May 7 - Mon, May 11
DEN
Denver
ALO
Waterloo
$449 Roundtrip, found 3 days ago
$449
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, May 7 from Denver to Waterloo, returning Mon, May 11, priced at $449 found 3 days ago
American Airlines
Thu, Jul 23 - Mon, Jul 27
DEN
Denver
ALO
Waterloo
$452 Roundtrip, found 2 hours ago
$452
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Thu, Jul 23 from Denver to Waterloo, returning Mon, Jul 27, priced at $452 found 2 hours ago
American Airlines
Fri, May 15 - Mon, May 18
DEN
Denver
ALO
Waterloo
$454 Roundtrip, found 5 days ago
$454
Roundtrip
found 5 days ago
Select American Airlines flight, departing Fri, May 15 from Denver to Waterloo, returning Mon, May 18, priced at $454 found 5 days ago
American Airlines
Fri, May 15 - Mon, May 18
DEN
Denver
ALO
Waterloo
$459 Roundtrip, found 5 days ago
$459
Roundtrip
found 5 days ago
Select American Airlines flight, departing Fri, May 15 from Denver to Waterloo, returning Mon, May 18, priced at $459 found 5 days ago
American Airlines
Fri, Apr 17 - Sun, Apr 19
DEN
Denver
ALO
Waterloo
$466 Roundtrip, found 18 hours ago
$466
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Fri, Apr 17 from Denver to Waterloo, returning Sun, Apr 19, priced at $466 found 18 hours ago
American Airlines
Fri, Apr 17 - Sun, Apr 19
DEN
Denver
ALO
Waterloo
$476 Roundtrip, found 18 hours ago
$476
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Fri, Apr 17 from Denver to Waterloo, returning Sun, Apr 19, priced at $476 found 18 hours ago
American Airlines
Mon, Apr 13 - Sat, Apr 18
DEN
Denver
ALO
Waterloo
$502 Roundtrip, found 4 days ago
$502
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Apr 13 from Denver to Waterloo, returning Sat, Apr 18, priced at $502 found 4 days ago
American Airlines
Sun, Apr 5 - Sun, Apr 12
DEN
Denver
ALO
Waterloo
$507 Roundtrip, found 6 days ago
$507
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Apr 5 from Denver to Waterloo, returning Sun, Apr 12, priced at $507 found 6 days ago

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) cost?
You can find cheap one-way flights from $308 and cheap return flights from $437 Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) with Expedia. One-way flights usually range from $468 to $992, and return flights typically cost between $298 and $1677. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
The cheapest month to fly from DEN to ALO is July when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
Enter DEN to ALO and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
The earliest flight from Denver International Airport (DEN) to Waterloo Regional Airport (ALO) usually leaves at around 12:30 AM, operated by American Airlines. This early departure allows you to maximize your time in Waterloo. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
The most popular departure times for flights from Denver (DEN) to Waterloo, IA (ALO) are in the early morning, from 6am to 9am. About 47% of passengers choose this time window. American Airlines is a key carrier offering flights during this period. This timing is favored because it helps you make the most of your day in Waterloo.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
A flight from DEN to ALO with a layover takes around 6 hours 30 minutes, with the route covering approximately 664 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
First class seats are offered on the DEN to ALO route with American Airlines.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Waterloo from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly into Waterloo Regional (ALO) to reach Waterloo. Some flights may connect through major hubs like Charlotte-Douglas Intl. (CLT), Philadelphia Intl. (PHL), Dallas-Fort Worth Intl. (DFW) before reaching Waterloo. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities 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 Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional)?
If you booked your Denver, CO (DEN-Denver Intl.) to Waterloo, IA (ALO-Waterloo Regional) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
Waterloo Regional
Airlines serving
American Airlines
Roundtrip price
$437
Distance
664 mi

Book with confidence

Denver to Waterloo Flights

The cheapest times to fly from Denver to Waterloo

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

 

The best time to book a flight from Denver to Waterloo

Sunday is one of the best days to book for cheap flights from Denver to Waterloo: 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 Denver to Waterloo

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 Denver to Waterloo in 2026. You can also book with separate airlines for your outbound and return journeys, from $308 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 Denver to Waterloo 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 Denver to Waterloo 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.

 

Denver to Waterloo Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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