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

For as low as $383, Delta can have you in Helena from Washington, D.C. Dulles Intl Airport in 7h 20m. There are 1812 mi between Washington, D.C. Dulles Intl Airport and Helena. Both multi-stop and nonstop flights can be found to your destination and back.

In terms of precipitation, rainfall in Helena ranges from 0.3 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Helena when rainfall is around 0.3 in.

If weather is an important factor for your trip to Helena, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 21.2 F).

What is the cheapest time of day to fly from IAD to HLN?

When flying from Washington, D.C. Dulles Intl Airport to Helena, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-Helena 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-Helena flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Helena 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-Helena 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-Helena flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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.

$190+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Helena

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Cheap flight deals from Dulles Intl to Helena

Cheapest

Best

Last-minute

One-way

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 August 26, 2026.

Mon 10/196:13 am -

1 stop8h 15m

Tue 10/271:08 pm -

1 stop8h 27m

Deal found 8/21

$359

Wed 10/216:13 am -

1 stop8h 15m

Tue 10/271:08 pm -

2 stops9h 34m

Deal found 8/21

$364

Sun 12/138:22 am -

1 stop7h 20m

Sun 12/202:27 pm -

1 stop8h 32m

Deal found 8/22

$383

Sat 10/246:13 am -

1 stop8h 15m

Tue 10/271:08 pm -

1 stop8h 27m

Deal found 8/21

$394

Mon 10/196:13 am -

1 stop8h 15m

Wed 10/281:08 pm -

2 stops19h 04m

Deal found 8/21

$417

Wed 10/216:05 am -

2 stops8h 23m

Sun 10/251:08 pm -

2 stops25h 20m

Deal found 8/21

$422

Wed 9/167:00 am -

1 stop7h 17m

Wed 9/3012:57 pm -

1 stop8h 46m

Deal found 8/23

$429

Wed 9/94:15 pm -

1 stop7h 15m

Wed 9/162:26 pm -

1 stop6h 53m

Deal found 8/25

$432

Fri 10/236:13 am -

1 stop8h 15m

Tue 10/271:08 pm -

2 stops9h 34m

Deal found 8/24

$434

Mon 10/196:13 am -

1 stop8h 15m

Thu 10/291:08 pm -

2 stops19h 04m

Deal found 8/21

$441

Best flights from Dulles Intl to Helena
Discover carefully curated flight deals from Dulles Intl to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Tue 10/206:13 am -

1 stop8h 15m

Tue 10/271:08 pm -

2 stops9h 34m

Deal found 8/21

$364

Sun 12/138:22 am -

1 stop7h 20m

Sun 12/202:27 pm -

1 stop8h 32m

Deal found 8/22

$383

Wed 10/216:13 am -

1 stop8h 15m

Mon 10/261:08 pm -

2 stops19h 04m

Deal found 8/21

$417

Wed 9/94:15 pm -

1 stop7h 15m

Wed 9/162:26 pm -

1 stop6h 53m

Deal found 8/25

$432

Fri 10/236:13 am -

1 stop8h 15m

Tue 10/271:08 pm -

2 stops9h 34m

Deal found 8/24

$434

Tue 10/202:43 pm -

1 stop8h 25m

Sat 10/316:28 am -

1 stop9h 27m

Deal found 8/21

$459

Sat 1/302:25 pm -

1 stop8h 34m

Wed 2/32:30 pm -

1 stop6h 43m

Deal found 8/23

$459

Thu 9/102:43 pm -

1 stop8h 47m

Mon 9/142:26 pm -

1 stop8h 06m

Deal found 8/26

$539

Last-minute flights from Dulles Intl to Helena
Discover last-minute flight deals from Dulles Intl to Helena. Data last updated August 26, 2026 and is based on user searches.

Sat 8/297:00 am -

1 stop7h 15m

Sun 9/612:55 pm -

1 stop8h 44m

Deal found 8/22

$474

Sat 8/2912:30 pm -

2 stops12h 00m

Sat 9/512:55 pm -

2 stops9h 39m

Deal found 8/22

$484

Sat 8/299:03 am -

1 stop9h 31m

Sat 9/55:11 pm -

1 stop10h 29m

Deal found 8/22

$539

Tue 9/19:03 am -

1 stop9h 31m

Thu 9/35:11 pm -

1 stop10h 29m

Deal found 8/24

$529

Tue 9/17:00 am -

1 stop7h 15m

Thu 9/312:55 pm -

2 stops9h 39m

Deal found 8/25

$544

Wed 9/94:15 pm -

1 stop7h 15m

Wed 9/162:26 pm -

1 stop6h 53m

Deal found 8/25

$432

Wed 9/99:03 am -

1 stop9h 38m

Wed 9/235:18 pm -

1 stop10h 22m

Deal found 8/25

$449

Wed 9/167:00 am -

1 stop7h 17m

Wed 9/3012:57 pm -

1 stop8h 46m

Deal found 8/21

$359

Find flight deals from Dulles Intl to Helena

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$359 (Delta)
One-way from	$190 (United Airlines)

Provider with most accurate pricing for Washington, D.C. Dulles Intl-Helena flight deals.

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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Helena flights.

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From Washington, D.C. Dulles Intl to Helena

Search Deals

One-way flight from Washington, D.C. Dulles Intl to Helena

Search Deals

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Tue 10/20

6:13 am-12:28 pm

1 stop8h 15m

Helena

Tue 10/27

1:08 pm-12:42 am

2 stops9h 34m

$364

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Sun 12/13

8:22 am-1:42 pm

1 stop7h 20m

Helena

Sun 12/20

2:27 pm-12:59 am

1 stop8h 32m

$383

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Wed 10/21

6:13 am-12:28 pm

1 stop8h 15m

Helena

Mon 10/26

1:08 pm-10:12 am

2 stops19h 04m

$417

Quickest round-trip

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Wed 9/9

4:15 pm-9:30 pm

1 stop7h 15m

Helena

Wed 9/16

2:26 pm-11:19 pm

1 stop6h 53m

$432

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Fri 10/23

6:13 am-12:28 pm

1 stop8h 15m

Helena

Tue 10/27

1:08 pm-12:42 am

2 stops9h 34m

$434

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Tue 10/20

2:43 pm-9:08 pm

1 stop8h 25m

Helena

Sat 10/31

6:28 am-5:55 pm

1 stop9h 27m

$459

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Sat 1/30

2:25 pm-8:59 pm

1 stop8h 34m

Helena

Wed 2/3

2:30 pm-11:13 pm

1 stop6h 43m

$459

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Thu 9/10

2:43 pm-9:30 pm

1 stop8h 47m

Helena

Mon 9/14

2:26 pm-12:32 am

1 stop8h 06m

$539

Cheapest one-way

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Sun 9/20

6:30 am-1:45 pm

1 stop9h 15m

$190

Quickest one-way

Washington, D.C.Helena

IAD Washington, D.C. Dulles Intl - HLN Helena

IADHLN

Washington, D.C. Dulles Intl

Thu 11/26

8:20 am-1:40 pm

1 stop7h 20m

$190

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/24

Showing 1-10 of 12 resultsSorted by cheapest first

Compare providers for flights from Dulles Intl to Helena

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Helena in August.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Helena 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-Helena flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Helena 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-Helena 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-Helena 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 Helena

Have a flexible travel schedule? Discover the best time to fly to Helena from Dulles Intl with our price prediction graph.

IAD-HLN

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.

Related info for your journey

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 $383, Delta can have you in Helena from Washington, D.C. Dulles Intl Airport in 7h 20m. There are 1812 mi between Washington, D.C. Dulles Intl Airport and Helena. Both multi-stop and nonstop flights can be found to your destination and back.
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.

See more FAQs

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$190+ Cheap flights from Dulles Intl (IAD) to Helena (HLN)

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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Helena with Cheapflights

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2. Select your favorite providers

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Cheap flight deals from Dulles Intl to Helena

Cheapest flights from Dulles Intl to HelenaExplore 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 August 26, 2026.

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 August 26, 2026.

Best flights from Dulles Intl to HelenaDiscover carefully curated flight deals from Dulles Intl to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Discover carefully curated flight deals from Dulles Intl to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Last-minute flights from Dulles Intl to HelenaDiscover last-minute flight deals from Dulles Intl to Helena. Data last updated August 26, 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Helena. Data last updated August 26, 2026 and is based on user searches.

One-way flights from Dulles Intl to HelenaSearch for one-way flight options from Dulles Intl to Helena. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.

Search for one-way flight options from Dulles Intl to Helena. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.

Find flight deals from Dulles Intl to Helena

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Round-trip from

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Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Helena that are best for you.

Compare providers for flights from Dulles Intl to Helena

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Helena in August.

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.

Related info for your journey

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Dulles Intl to Helena

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Complete your trip

Complete your trip to Helena by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Dulles Intl to Helena by cabin class

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Other flights to Helena

Explore flights to Helena departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 26, 2026.

Dulles Intl and Helena flights

Browse other Dulles Intl and Helena flight options. Last updated on August 26, 2026.

Other flights from Dulles Intl

Browse through other flights departing from Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on August 26, 2026.

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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 August 26, 2026.

Best flights from Dulles Intl to Helena
Discover carefully curated flight deals from Dulles Intl to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.

Last-minute flights from Dulles Intl to Helena
Discover last-minute flight deals from Dulles Intl to Helena. Data last updated August 26, 2026 and is based on user searches.

One-way flights from Dulles Intl to Helena
Search for one-way flight options from Dulles Intl to Helena. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.