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$597+ Cheap flights from Dulles Intl (IAD) to Waterloo, IA (ALO)

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ALO
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Dulles Intl to Waterloo

Cheapest flights from Dulles Intl to Waterloo
Explore the most affordable flight options available from Dulles Intl to Waterloo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This American Airlines deal was found by Cheapflights users on 12/10. 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 12/236:35 amIAD - ALO
2 stops18h 10mAmerican Airlines
Sat 12/275:40 amALO - IAD
2 stops17h 24mAmerican Airlines
Deal found 12/10$816

Find flight deals from Dulles Intl to Waterloo

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Waterloo (ALO). 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 December 12, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$597
(American Airlines)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Waterloo flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Waterloo flights.
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From Washington, D.C. Dulles Intl to Waterloo
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Waterloo 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 December 12, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Waterloo that are best for you.

Fly from

Dulles Intl

Fly to

Waterloo

Route

Depart

Return

Price

Washington, D.C.Waterloo

IAD - ALO

IADALO

Washington, D.C. Dulles Intl

Fri 1/9

7:01 am-2:53 pm

2 stops8h 52m

Waterloo

Fri 1/16

3:23 pm-11:12 pm

2 stops6h 49m

$597

Washington, D.C.Waterloo

IAD - ALO

IADALO

Washington, D.C. Dulles Intl

Tue 12/23

6:35 am-11:45 pm

2 stops18h 10m

Waterloo

Sat 12/27

5:40 am-12:04 am

2 stops17h 24m

$816

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Waterloo, Iowa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Waterloo, Iowa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Waterloo, Iowa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Waterloo, Iowa 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 Washington, D.C. Dulles Intl Airport-Waterloo, Iowa 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 Dulles Intl to Waterloo

Have a flexible travel schedule? Discover the best time to fly to Waterloo from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Waterloo

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Waterloo, Iowa?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Waterloo, Iowa (average of $74). Flying from Washington, D.C. Dulles Intl Airport to Waterloo, Iowa in December is currently the most expensive (average of $443). 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 Dulles Intl to Waterloo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Waterloo from Washington, D.C. Dulles Intl?

    If you book a flight to Waterloo from Washington, D.C. Dulles Intl, you will be flying to Waterloo, which is the city’s only airport. Waterloo (ALO) is located 5.3 mi from the center of Waterloo. There are 0 flights from Washington, D.C. Dulles Intl to Waterloo per day from 0 different airlines.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Waterloo, Iowa?

    Airlines like American Airlines fly from Washington, D.C. Dulles Intl Airport to Waterloo, Iowa in about 8h 52m. The time it takes to get you to your destination can typically vary by up to . Washington, D.C. Dulles Intl Airport and Waterloo, Iowa are separated by a distance of 819 mi.

  • Can I find deals for flights from Dulles Intl to Waterloo that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to Waterloo?

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

  • Can I find deals for business class flights from Dulles Intl to Waterloo?

    Yes. Cheapflights offers flight deals from Dulles Intl to Waterloo 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 Washington, D.C. Dulles Intl Airport to Waterloo, Iowa?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Waterloo, Iowa (average of $74). Flying from Washington, D.C. Dulles Intl Airport to Waterloo, Iowa in December is currently the most expensive (average of $443). 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?

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