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Dulles Intl

$513+ Cheap flights from Waterloo, IA (ALO) to Dulles Intl (IAD)

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 — IAD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Cheap flight deals from Waterloo to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Waterloo (ALO) to Dulles Intl (IAD). 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 November 26, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$582
(American Airlines)
Provider with most accurate pricing for Waterloo-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Waterloo-Washington, D.C. (WAS) flights.
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From Waterloo to Washington, D.C. Dulles Intl
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Find flight deals from Waterloo to Dulles Intl

Cheapest flights from Waterloo to Dulles Intl
Explore the most affordable flight options available from Waterloo to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This American Airlines deal was found by Cheapflights users on 11/23. 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 12/36:00 amALO - IAD
2 stops9h 59mAmerican Airlines
Sat 12/66:25 amIAD - ALO
2 stops9h 31mAmerican Airlines
Deal found 11/23$513
This American Airlines deal was found by Cheapflights users on 11/23. 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.
Fri 12/126:00 amALO - IAD
2 stops6h 34mAmerican Airlines
Sun 12/149:15 amIAD - ALO
2 stops6h 41mAmerican Airlines
Deal found 11/23$599
This American Airlines deal was found by Cheapflights users on 11/25. 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 12/235:50 amALO - IAD
2 stops6h 37mAmerican Airlines
Tue 12/301:57 pmIAD - ALO
2 stops10h 48mAmerican Airlines
Deal found 11/25$691
This American Airlines deal was found by Cheapflights users on 11/24. 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 12/275:40 amALO - IAD
2 stops6h 47mAmerican Airlines
Mon 12/296:35 amIAD - ALO
2 stops9h 04mAmerican Airlines
Deal found 11/24$724

Cheapflights Fare Finder

 
Customize your flight search to find flights from Waterloo to Dulles Intl 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 November 26, 2025.
Use the filters below to find and compare flights from Waterloo to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Waterloo

Fly to

Dulles Intl

Route

Depart

Return

Price

WaterlooWashington, D.C.

ALO - IAD

ALOIAD

Waterloo

Sat 1/24

6:00 am-5:16 pm

2 stops10h 16m

Washington, D.C. Dulles Intl

Tue 1/27

1:08 pm-10:23 pm

2 stops10h 15m

$582

WaterlooWashington, D.C.

ALO - IAD

ALOIAD

Waterloo

Fri 12/12

6:00 am-1:34 pm

2 stops6h 34m

Washington, D.C. Dulles Intl

Sun 12/14

9:15 am-2:56 pm

2 stops6h 41m

$599

WaterlooWashington, D.C.

ALO - IAD

ALOIAD

Waterloo

Tue 12/23

5:50 am-1:27 pm

2 stops6h 37m

Washington, D.C. Dulles Intl

Tue 12/30

1:57 pm-11:45 pm

2 stops10h 48m

$691

WaterlooWashington, D.C.

ALO - IAD

ALOIAD

Waterloo

Sat 12/27

5:40 am-1:27 pm

2 stops6h 47m

Washington, D.C. Dulles Intl

Mon 12/29

6:35 am-2:39 pm

2 stops9h 04m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/23

Best time to book a flight from Waterloo to Dulles Intl

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

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

Currently, March is the cheapest month in which you can book a flight from Waterloo, Iowa to Washington, D.C. Dulles Intl Airport (average of $184). Flying from Waterloo, Iowa to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $450). 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 Dulles Intl. 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 from for flights from Waterloo to Washington, D.C. Dulles Intl?

    If you book a flight to Washington, D.C. Dulles Intl from Waterloo, you will be flying from 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 Waterloo to Washington, D.C. Dulles Intl per day from 0 different airlines.

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

    A quick flight from Waterloo, Iowa to Washington, D.C. Dulles Intl Airport can take about 10h 16m. American Airlines provides one of the quickest options available for as low as $582. The distance between Waterloo, Iowa and Washington, D.C. Dulles Intl Airport is about 819 mi.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Waterloo, Iowa to Washington, D.C. Dulles Intl Airport (average of $184). Flying from Waterloo, Iowa to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $450). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Falls Church
Bowie
Largo
McLean
Clinton

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