HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Helena (HLN) to Dulles Intl (IAD) from $224

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
HLN — IAD
May 7 — May 141
From?
To?
Tue 5/7
Tue 5/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Cheap 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 May 2, 2024.

Round-trip from

$234

One-way from

$224
From Helena to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Helena to Washington, D.C. Dulles Intl
Search Deals

What is the cheapest day to fly round-trip from Helena to Washington, D.C. Dulles Intl Airport?

Sunday flights are generally found to be more expensive for flights from Helena to Washington, D.C. Dulles Intl Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C. Dulles Intl Airport.

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

The best pricing can be found in the month of August. Prices to Washington, D.C. Dulles Intl Airport from Helena average $746. You can even find prices in August for less than $746, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $430. The month of April appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from Helena. Flying in the targeted month can save you up to 82%.

When is the cheapest time to fly from Helena to Washington, D.C. Dulles Intl Airport (HLN - IAD)?

A simple way to save on the total cost of your ticket is to fly from Helena to Washington, D.C. Dulles Intl Airport at noon. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the morning.

Cheap Delta flights from Helena to Dulles Intl

Explore cheap flight options specifically provided by Delta for the route between Helena and Dulles Intl. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Take a peek at the cheapest Delta flights we've detected traveling from Helena to Washington, D.C.. Make sure to check back often as deals are often changing.
Thu 8/221:10 pmHLN - IAD
1 stop8h 40mDelta
Mon 8/267:30 amIAD - HLN
1 stop7h 00mDelta
Deal found 5/1$468
Wed 5/151:24 pmHLN - IAD
1 stop8h 29mDelta
Sat 5/187:15 amIAD - HLN
1 stop7h 28mDelta
Deal found 5/1$508
Thu 8/221:10 pmHLN - IAD
2 stops14h 55mDelta
Mon 8/267:30 amIAD - HLN
1 stop7h 00mDelta
Deal found 5/1$535
Wed 5/155:50 amHLN - IAD
2 stops12h 43mDelta
Sat 5/187:15 amIAD - HLN
1 stop7h 28mDelta
Deal found 5/1$608
Wed 5/155:50 amHLN - IAD
2 stops12h 43mDelta
Sat 5/186:00 amIAD - HLN
2 stops8h 43mDelta
Deal found 5/1$678
Fri 7/261:15 pmHLN - IAD
1 stop8h 39mDelta
Thu 8/112:35 pmIAD - HLN
2 stops11h 56mDelta
Deal found 5/1$693
Fri 7/261:15 pmHLN - IAD
1 stop8h 39mDelta
Thu 8/17:15 amIAD - HLN
1 stop7h 20mDelta
Deal found 5/1$768
Fri 7/266:00 amHLN - IAD
2 stops8h 20mDelta
Thu 8/112:35 pmIAD - HLN
2 stops11h 56mDelta
Deal found 5/1$778

Cheap Alaska Airlines flights from Helena to Dulles Intl

Explore cheap flight options specifically provided by Alaska Airlines for the route between Helena and Dulles Intl. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Take a gander at the lowest prices we've found on Alaska Airlines flights from Helena to Washington, D.C.. Check back soon if you're not seeing flights that suit your needs.
Mon 9/93:44 pmHLN - IAD
1 stop30h 15mAlaska Airlines
Fri 9/137:09 pmIAD - HLN
1 stop21h 52mAlaska Airlines
Deal found 5/1$524
Mon 9/93:44 pmHLN - IAD
1 stop30h 15mAlaska Airlines
Fri 9/135:57 pmIAD - HLN
2 stops23h 04mAlaska Airlines
Deal found 5/1$563
Mon 9/93:44 pmHLN - IAD
2 stops22h 49mAlaska Airlines
Fri 9/135:57 pmIAD - HLN
2 stops23h 04mAlaska Airlines
Deal found 5/1$653
Tue 5/142:56 pmHLN - IAD
2 stops25h 01mAlaska Airlines
Tue 5/216:05 pmIAD - HLN
2 stops22h 18mAlaska Airlines
Deal found 5/1$861
Tue 5/142:56 pmHLN - IAD
2 stops25h 01mAlaska Airlines
Tue 5/217:00 amIAD - HLN
1 stop9h 23mAlaska Airlines
Deal found 5/1$886

Cheap Helena to Dulles Intl flights in May & June 2024

Find cheap flight options from Helena to Dulles Intl specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Prices were last updated on May 2, 2024.
Check out some of the best flight deals from Helena to Washington, D.C. in 2024. Check back regularly for other flight deals.
Wed 5/151:24 pmHLN - IAD
1 stop8h 29mDelta
Sat 5/187:15 amIAD - HLN
1 stop7h 28mDelta
Deal found 5/1$508
Tue 5/142:20 pmHLN - IAD
1 stop6h 54mUnited Airlines
Fri 5/1710:00 pmIAD - HLN
1 stop17h 26mUnited Airlines
Deal found 4/30$557
Tue 5/146:50 amHLN - IAD
2 stops12h 12mUnited Airlines
Fri 5/1710:00 pmIAD - HLN
1 stop17h 26mUnited Airlines
Deal found 4/30$562
Wed 5/155:50 amHLN - IAD
2 stops12h 43mDelta
Sat 5/187:15 amIAD - HLN
1 stop7h 28mDelta
Deal found 5/1$608
Tue 5/142:20 pmHLN - IAD
1 stop19h 16mUnited Airlines
Fri 5/1710:00 pmIAD - HLN
1 stop17h 26mUnited Airlines
Deal found 5/1$636
Tue 5/146:50 amHLN - IAD
2 stops13h 52mUnited Airlines
Fri 5/1710:05 pmIAD - HLN
2 stops25h 06mUnited Airlines
Deal found 4/30$655
Tue 5/146:50 amHLN - IAD
2 stops15h 22mUnited Airlines
Fri 5/1710:00 pmIAD - HLN
1 stop25h 11mUnited Airlines
Deal found 5/1$661
Tue 5/142:20 pmHLN - IAD
1 stop19h 16mUnited Airlines
Tue 5/2110:00 pmIAD - HLN
1 stop25h 11mUnited Airlines
Deal found 5/1$671
Tue 5/146:50 amHLN - IAD
1 stop20h 31mUnited Airlines
Wed 5/228:15 amIAD - HLN
1 stop7h 11mUnited Airlines
Deal found 4/30$672

Helena to Dulles Intl 2024 flight deals

Discover exclusive flight deals for travel between Helena and Dulles Intl in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Check out some of the best flight deals from Helena to Washington, D.C. in 2024. Check back regularly for other flight deals.
Thu 8/221:10 pmHLN - IAD
1 stop8h 40mDelta
Mon 8/267:30 amIAD - HLN
1 stop7h 00mDelta
Deal found 4/30$468
Mon 9/93:44 pmHLN - IAD
1 stop30h 15mAlaska Airlines
Fri 9/137:09 pmIAD - HLN
1 stop21h 52mAlaska Airlines
Deal found 4/30$504
Wed 5/151:24 pmHLN - IAD
1 stop8h 29mDelta
Sat 5/187:15 amIAD - HLN
1 stop7h 28mDelta
Deal found 5/1$508
Mon 9/93:44 pmHLN - IAD
1 stop30h 15mAlaska Airlines
Fri 9/137:09 pmIAD - HLN
1 stop21h 52mAlaska Airlines
Deal found 5/1$524
Thu 8/221:10 pmHLN - IAD
2 stops14h 55mDelta
Mon 8/267:30 amIAD - HLN
1 stop7h 00mDelta
Deal found 5/1$535
Mon 9/93:44 pmHLN - IAD
1 stop30h 15mAlaska Airlines
Fri 9/135:57 pmIAD - HLN
2 stops23h 04mAlaska Airlines
Deal found 4/30$543
Tue 5/142:20 pmHLN - IAD
1 stop6h 54mUnited Airlines
Fri 5/1710:00 pmIAD - HLN
1 stop17h 26mUnited Airlines
Deal found 4/30$557
Tue 5/146:50 amHLN - IAD
2 stops12h 12mUnited Airlines
Fri 5/1710:00 pmIAD - HLN
1 stop17h 26mUnited Airlines
Deal found 4/30$562
Mon 9/93:44 pmHLN - IAD
1 stop30h 15mAlaska Airlines
Fri 9/135:57 pmIAD - HLN
2 stops23h 04mAlaska Airlines
Deal found 5/1$563

One-way flights to Dulles Intl from Helena

Search for one-way flight options from Helena to Dulles Intl. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
Users traveling one-way from Helena to Washington, D.C. can select one of these great deals. For those needing a return trip from Helena, there is a search form available above.
Wed 9/41:10 pmHLN - IAD
1 stop8h 40mDelta
Deal found 5/1$224
Wed 9/46:45 amHLN - IAD
2 stops13h 24mUnited Airlines
Deal found 5/1$274
Thu 5/91:24 pmHLN - IAD
1 stop8h 29mDelta
Deal found 5/2$504
Thu 5/96:50 amHLN - IAD
2 stops13h 52mUnited Airlines
Deal found 5/2$509
Thu 5/92:20 pmHLN - IAD
2 stops14h 52mUnited Airlines
Deal found 5/1$529
Thu 5/96:50 amHLN - IAD
3 stops12h 05mUnited Airlines
Deal found 5/1$1,262
Thu 5/96:50 amHLN - IAD
3 stops12h 05mUnited Airlines
Deal found 5/2$1,310

Find flights from Helena to Dulles Intl within your budget

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 2,899,487 searches. Data last updated May 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$468 - $661

Route

Depart

Return

Price

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Thu 8/22

1 stop8h 40m

Washington, D.C. Dulles Intl

Mon 8/26

1 stop7h 00m

$468

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Wed 5/15

1 stop8h 29m

Washington, D.C. Dulles Intl

Sat 5/18

1 stop7h 28m

$508

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Mon 9/9

1 stop30h 15m

Washington, D.C. Dulles Intl

Fri 9/13

1 stop21h 52m

$524

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Thu 8/22

2 stops14h 55m

Washington, D.C. Dulles Intl

Mon 8/26

1 stop7h 00m

$535

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Mon 9/9

1 stop30h 15m

Washington, D.C. Dulles Intl

Fri 9/13

2 stops23h 04m

$563

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Tue 5/14

1 stop19h 16m

Washington, D.C. Dulles Intl

Fri 5/17

1 stop17h 26m

$636

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Thu 8/22

1 stop20h 59m

Washington, D.C. Dulles Intl

Mon 8/26

3 stops25h 00m

$646

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Mon 9/9

2 stops22h 49m

Washington, D.C. Dulles Intl

Fri 9/13

2 stops23h 04m

$653

HelenaWashington, D.C. Dulles Intl

HLN - IAD

HLNIAD

Helena

Tue 5/14

2 stops15h 22m

Washington, D.C. Dulles Intl

Fri 5/17

1 stop25h 11m

$661

Flights are sorted by cheapest first

Deals found on 5/1

When is the cheapest time to fly from Helena to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Helena to Dulles Intl. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Helena to Washington, D.C. Dulles Intl Airport flight should consider departing on Sunday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Dulles Intl by month

Plan your trip from Helena to Dulles Intl by taking into account the cheapest months to travel. The average price of a one-way flight from Helena to Dulles Intl is currently $659 while a round-trip flight costs $577. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from Helena to Washington, D.C. Dulles Intl Airport (average of $281). Flying from Helena to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $398). 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.

January

$308

February

$303

March

$358

April

$337

May

$337

June

$398

July

$378

August

$296

September

$281

October

$303

November

$328

December

$291

Temperature and rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature and rainfall totals by month.

WAS

Temperature

35.6 - 80.6 °F

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated May 2, 2024.
Read through reviews of airlines operating flights from Helena to Washington, D.C., such as Delta, Alaska Airlines and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,115 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
10,874 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,159 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Entertainment

7.3

Food

7.3

Crew

8.6

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

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 1 airline. Helena is conveniently located just 2.7 mi from Helena’s city center.

  • Can I find flights from Helena to Washington, D.C. Dulles Intl Airport for under $500 on Cheapflights?

    Yes, there are multiple flights from Helena to Washington, D.C. Dulles Intl Airport for under $500. The cheapest flight booked recently is on Delta for just $468, but on average you can expect to pay $682.

  • What are the cheapest airlines flying from Helena to Washington, D.C. Dulles Intl Airport round-trip?

    Our cheapest airline available from Helena to Washington, D.C. Dulles Intl Airport is Delta. Our recent data shows that you can find tickets from as low as $468 on this airline. Additional options worth looking into are Alaska Airlines and United Airlines, starting at $524 and $636 round-trip.

  • What does HLN to IAD mean?

    Great question - HLN to IAD just means Helena Airport to Washington, D.C. Dulles Intl Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from Helena to Dulles Intl that include extra baggage allowance?

    The amount of baggage you can bring on your Helena to Dulles Intl flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Helena to Dulles Intl with specific airlines?

    Yes, Cheapflights allows you to browse and filter Helena to Dulles Intl flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Helena to Dulles Intl that allow pets onboard?

    Many airlines flying from Helena to Dulles Intl offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Helena to Dulles Intl?

    Yes, you can often find last-minute deals on Helena to Dulles Intl flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Helena to Washington, D.C. Dulles Intl Airport flight deals updated?

    The Helena to Washington, D.C. Dulles Intl Airport flight deals you see on this page were last updated on 5/1.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Helena to Dulles Intl
See prices for flight routes from nearby airports that may be better suited for you.

Bozeman to Dulles Intl flights
Missoula to Dulles Intl flights
Bozeman to Reagan-National flights
Bozeman to Baltimore flights
Missoula to Baltimore flights
Missoula to Reagan-National flights
Helena to Baltimore flights
Great Falls to Baltimore flights
Kalispell to Dulles Intl flights
Billings to Dulles Intl flights
Great Falls to Dulles Intl flights
Kalispell to Reagan-National flights
Helena to Reagan-National flights
Kalispell to Baltimore flights
Billings to Baltimore flights
Billings to Reagan-National flights
Great Falls to Reagan-National flights

Top airline flying from Helena to Dulles Intl

Discover the top airline that operate flights from Helena to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,899,487 searches. Data last updated May 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$538Average$863FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Savannah to Atlanta flights
Chicago O'Hare Intl Airport to Los Angeles flights
Salt Lake City to Seattle flights
Miami to Paris flights
Minneapolis to Phoenix flights
Orlando to Newark Airport flights
Austin to Phoenix flights
Sacramento to Los Angeles flights
Los Angeles to Puerto Vallarta flights
Pittsburgh to Tampa flights
New York to Sydney flights
Helena to Niagara Falls, New York flights

Search flights from Helena to Dulles Intl by cabin class

Find flights from Helena to Dulles Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Saint Peter Jersey
Flights to Kirkwall Arpt
Flights to Skiathos
Flights to Naxos
Flights to Ningbo Lishe Intl
Flights to Edremit/Korfez
Flights to Bourgas
Flights to Bodø
Flights to Pellston Emmet County
Flights to Cornwall Newquay
Flights to Ordu/Giresun
Flights to Batumi
Flights to Mason City
Flights to Biarritz Parme
Flights to Zakynthos Dionsios Salomos
Flights to Cortez Montezuma County
Flights to Clermont-Ferrand Aulnat
Flights to Nevsehir
Flights to Hyannis Barnstable
Flights to Girona Costa Brava
Flights to Kagoshima
Flights to Perugia Sant Egidio
Flights to Oran Es Senia
Flights to Chios

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Helena to Dulles Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Helena to Dulles Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Helena to Dulles Intl?

Cheapflights helps you find that perfect flight to Dulles Intl from Helena by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Helena to Dulles Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Helena to Dulles Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Helena to Dulles Intl become cheaper?

Not ready to book yet? You can track prices for flights from Helena to Dulles Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines