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Dulles Intl

$284+ Cheap flights from Helena (HLN) to Dulles Intl (IAD)

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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — IAD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Helena to Dulles Intl

Best flights from Helena to Dulles Intl
Discover carefully curated flight deals from Helena to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 1/216:48 pmHLN - IAD
1 stop19h 38mAlaska Airlines
Sat 1/246:04 pmIAD - HLN
1 stop26h 07mAlaska Airlines
Deal found 12/9$375
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/101:10 pmHLN - IAD
1 stop8h 38mDelta
Wed 1/147:05 amIAD - HLN
1 stop7h 22mDelta
Deal found 12/10$389
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/244:36 pmHLN - IAD
1 stop22h 44mAlaska Airlines
Fri 2/276:20 pmIAD - HLN
2 stops23h 39mAlaska Airlines
Deal found 12/10$443
This Alaska Airlines deal was found by Cheapflights users on 12/11. 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.
Sun 2/224:36 pmHLN - IAD
2 stops22h 51mAlaska Airlines
Thu 2/267:05 amIAD - HLN
1 stop10h 54mAlaska Airlines
Deal found 12/11$480

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$375
(Alaska Airlines)

One-way from

$284
(KAYAK)
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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One-way flight 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 December 12, 2025.
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

Wed 1/21

6:48 pm-4:26 pm

1 stop19h 38m

Washington, D.C. Dulles Intl

Sat 1/24

6:04 pm-6:11 pm

1 stop26h 07m

$375

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sat 1/10

1:10 pm-11:48 pm

1 stop8h 38m

Washington, D.C. Dulles Intl

Wed 1/14

7:05 am-12:27 pm

1 stop7h 22m

$389

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 2/24

4:36 pm-5:20 pm

1 stop22h 44m

Washington, D.C. Dulles Intl

Fri 2/27

6:20 pm-3:59 pm

2 stops23h 39m

$443

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sun 2/22

4:36 pm-5:27 pm

2 stops22h 51m

Washington, D.C. Dulles Intl

Thu 2/26

7:05 am-3:59 pm

1 stop10h 54m

$480

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 12/18

1:06 pm-11:29 pm

1 stop8h 23m

$284

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Fri 1/2

2:26 pm-5:19 am

1 stop12h 53m

$572

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sun 1/4

2:26 pm-7:29 am

2 stops15h 03m

$596

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sat 1/3

2:26 pm-5:19 am

1 stop12h 53m

$632

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

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 February is currently the most expensive (average of $473). 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 Alaska Airlines and Delta fly from Helena to Washington, D.C. Dulles Intl Airport in about 8h 38m. The time it takes to get you to your destination can typically vary by up to 11h. 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 February is currently the most expensive (average of $473). 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
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Rockville
Laurel
Towson
National Harbor
Bowie
Largo
McLean
Clinton

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