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Helena

$402+ Cheap flights from Dulles Intl (IAD) to Helena (HLN)

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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — HLN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Dulles Intl to Helena

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Helena (HLN). 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 September 17, 2025.

Round-trip from

$402
(Alaska Airlines)

Popular in

November

Cheapest in

April

Average price

$564
From Washington, D.C. Dulles Intl to Helena
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Highest demand for flights based on searches. 10% potential increase in price ($74 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Dulles Intl to Helena

Cheapest flights from Dulles Intl to Helena
Explore the most affordable flight options available from Dulles Intl to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/17. 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.
Fri 10/177:41 pmIAD - HLN
1 stop24h 00mAlaska Airlines
Tue 10/216:18 pmHLN - IAD
1 stop28h 05mAlaska Airlines
Deal found 9/17$402
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 11/237:38 amIAD - HLN
1 stop13h 14mAlaska Airlines
Mon 12/17:32 pmHLN - IAD
1 stop19h 04mAlaska Airlines
Deal found 9/14$573
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/3010:09 pmIAD - HLN
1 stop18h 00mUnited Airlines
Sat 10/45:18 pmHLN - IAD
1 stop10h 04mUnited Airlines
Deal found 9/15$645
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/187:33 amIAD - HLN
1 stop12h 22mAlaska Airlines
Fri 12/266:32 pmHLN - IAD
1 stop9h 41mAlaska Airlines
Deal found 9/15$693
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/1710:20 pmIAD - HLN
2 stops17h 47mUnited Airlines
Tue 10/212:44 pmHLN - IAD
2 stops14h 48mUnited Airlines
Deal found 9/15$724
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 12/197:33 amIAD - HLN
1 stop12h 22mAlaska Airlines
Fri 12/266:32 pmHLN - IAD
1 stop21h 11mAlaska Airlines
Deal found 9/15$834

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Helena 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 September 17, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Helena that are best for you.

Fly from

Dulles Intl

Fly to

Helena

Route

Depart

Return

Price

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 10/24

7:41 pm-5:41 pm

1 stop24h 00m

Helena

Tue 10/28

6:13 pm-6:23 am

1 stop10h 10m

$402

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 10/17

7:41 pm-5:41 pm

1 stop24h 00m

Helena

Tue 10/21

6:18 pm-12:23 am

1 stop28h 05m

$402

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Sun 11/23

7:38 am-6:52 pm

1 stop13h 14m

Helena

Mon 12/1

7:32 pm-4:36 pm

1 stop19h 04m

$573

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Sat 2/14

5:51 pm-3:43 pm

2 stops23h 52m

Helena

Fri 2/20

4:10 pm-5:55 pm

1 stop23h 45m

$588

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 10/24

10:19 pm-2:07 pm

2 stops17h 48m

Helena

Tue 10/28

2:22 pm-7:27 am

2 stops15h 05m

$638

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Tue 9/30

10:09 pm-2:09 pm

1 stop18h 00m

Helena

Sat 10/4

5:18 pm-5:22 am

1 stop10h 04m

$645

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Sat 12/20

10:10 pm-9:31 pm

1 stop25h 21m

$480

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Sun 12/21

10:10 pm-9:31 pm

1 stop25h 21m

$480

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 12/19

7:33 am-5:55 pm

1 stop12h 22m

$499

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 12/19

6:30 am-1:45 pm

2 stops9h 15m

$686

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 11 results
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Best time to book a flight from Dulles Intl to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena 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 Helena

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Helena (average of $353). Flying from Washington, D.C. Dulles Intl Airport to Helena in May is currently the most expensive (average of $517). 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 Helena. 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 Helena from Washington, D.C. Dulles Intl?

    Most people fly into Helena (HLN) if they book a flight to Helena from Washington, D.C. Dulles Intl. On average, Helena has 0 inbound flights from 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 Washington, D.C. Dulles Intl Airport to Helena?

    For as low as $402, Alaska Airlines can have you in Helena from Washington, D.C. Dulles Intl Airport in 24h. There are 1812 mi between Washington, D.C. Dulles Intl Airport and Helena.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Helena 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 Helena?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Helena (average of $353). Flying from Washington, D.C. Dulles Intl Airport to Helena in May is currently the most expensive (average of $517). 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

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Alternative routes for Dulles Intl to Helena

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