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Dulles Intl

$359+ Cheap flights from Helena (HLN) 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — IAD
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from Helena to Dulles Intl

Cheapest flights from Helena to Dulles Intl
Explore the most affordable flight options available from Helena to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.

This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/242:25 pm
HLN
-
IAD
1 stop6h 54m
United Airlines
Fri 2/272:12 pm
IAD
-
HLN
1 stop9h 04m
United Airlines
Deal found 1/26$359
This United Airlines deal was found by Cheapflights users on 1/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/232:30 pm
HLN
-
IAD
1 stop8h 02m
United Airlines
Tue 7/282:39 pm
IAD
-
HLN
1 stop8h 20m
United Airlines
Deal found 1/25$379
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/244:36 pm
HLN
-
IAD
2 stops22h 51m
Alaska Airlines
Fri 2/277:05 am
IAD
-
HLN
1 stop10h 54m
Alaska Airlines
Deal found 1/26$406
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/164:36 pm
HLN
-
IAD
2 stops22h 51m
Alaska Airlines
Fri 3/207:11 pm
IAD
-
HLN
1 stop24h 34m
Alaska Airlines
Deal found 1/26$416
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/102:27 pm
HLN
-
IAD
1 stop6h 55m
United Airlines
Sat 2/142:12 pm
IAD
-
HLN
1 stop9h 04m
United Airlines
Deal found 1/26$470
This United Airlines deal was found by Cheapflights users on 1/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/306:15 am
HLN
-
IAD
1 stop8h 20m
United Airlines
Tue 2/32:24 pm
IAD
-
HLN
1 stop9h 02m
United Airlines
Deal found 1/25$484
This Alaska Airlines deal was found by Cheapflights users on 1/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/144:43 pm
HLN
-
IAD
1 stop29h 16m
Alaska Airlines
Mon 5/186:00 am
IAD
-
HLN
1 stop12h 06m
Alaska Airlines
Deal found 1/25$623

Find flight deals from Helena to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) 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 January 26, 2026.

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FlightHub
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FlightHub
3 stars

Round-trip from

$359
(United Airlines)
Provider with most accurate pricing for Helena-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Helena-Washington, D.C. (WAS) flights.
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From Helena to Washington, D.C. Dulles Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Helena 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 January 26, 2026.
Use the filters below to find and compare flights from Helena to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Helena

Fly to

Dulles Intl

Route

Depart

Return

Price

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 2/24

2:25 pm-11:19 pm

1 stop6h 54m

Washington, D.C. Dulles Intl

Fri 2/27

2:12 pm-9:16 pm

1 stop9h 04m

$359

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 7/23

2:30 pm-12:32 am

1 stop8h 02m

Washington, D.C. Dulles Intl

Tue 7/28

2:39 pm-8:59 pm

1 stop8h 20m

$379

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Mon 3/16

4:36 pm-5:27 pm

2 stops22h 51m

Washington, D.C. Dulles Intl

Fri 3/20

7:11 pm-5:45 pm

1 stop24h 34m

$416

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 2/10

2:27 pm-11:22 pm

1 stop6h 55m

Washington, D.C. Dulles Intl

Sat 2/14

2:12 pm-9:16 pm

1 stop9h 04m

$470

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 5/14

4:43 pm-11:59 pm

1 stop29h 16m

Washington, D.C. Dulles Intl

Mon 5/18

6:00 am-4:06 pm

1 stop12h 06m

$623

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 2/10

1:10 pm-11:48 pm

1 stop8h 38m

Washington, D.C. Dulles Intl

Sat 2/14

12:35 pm-10:27 pm

2 stops11h 52m

$719

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 5/14

5:45 am-7:16 pm

2 stops11h 31m

Washington, D.C. Dulles Intl

Mon 5/18

7:15 am-12:23 pm

1 stop7h 08m

$894

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sat 6/13

4:59 pm-11:59 pm

1 stop29h 00m

$387

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sat 6/13

12:50 pm-11:51 pm

1 stop9h 01m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Best time to book a flight from Helena to Dulles Intl

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

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

Currently, November is the cheapest month in which you can book a flight from Helena to Washington, D.C. Dulles Intl Airport (average of $230). Flying from Helena to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $388). 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 Helena 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 Helena to Washington, D.C. Dulles Intl?

    Most people fly from Helena (HLN) if they book a flight from Helena to Washington, D.C. Dulles Intl. On average, Helena has 0 outbound flights to Washington, D.C. Dulles Intl per day from 0 airlines. Helena is conveniently located just 2.7 mi from Helena’s city center.

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

    Airlines like United Airlines and Alaska Airlines fly from Helena to Washington, D.C. Dulles Intl Airport in about 6h 54m. The time it takes to get you to your destination can typically vary by up to 15h 57m. Airlines will cover a distance of 1812 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Helena to Washington, D.C. Dulles Intl Airport (average of $230). Flying from Helena to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $388). 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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

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