IAD - HLN

$354 Find Cheap Flights from Washington Dulles Airport to Helena

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Helena departing on 1/31. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Helena

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Helena, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Helena, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$354
Alaska Airlines
Sat 1/31Wed 2/4
IAD - HLN • 1 stop
Cheapest one-way
Multiple Airlines
Tue 12/16
IAD - HLN • multi-stop
Top airlines
Alaska Airlines
Cheapest • from $354 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Helena (IAD-HLN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Helena that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Helena

Sat, Jan 31 - Wed, Feb 4
Alaska Airlines Logo
6:04 pm - 6:11 pm
IAD
-
HLN
26h 07m1 stop
Alaska Airlines Logo
6:48 pm - 4:26 pm
HLN
-
IAD
19h 38m1 stop
$354Alaska Airlines
Sat, Jan 31 - Wed, Feb 4
Alaska Airlines Logo
6:04 pm - 6:11 pm
IAD
-
HLN
26h 07m1 stop
Alaska Airlines Logo
6:48 pm - 4:26 pm
HLN
-
IAD
19h 38m1 stop
$375Alaska Airlines
Sat, Jan 10 - Tue, Jan 13
United Airlines Logo
4:11 pm - 9:26 pm
IAD
-
HLN
7h 15m1 stop
United Airlines Logo
6:15 am - 3:12 pm
HLN
-
IAD
6h 57m1 stop
$389United Airlines
Fri, Mar 6 - Tue, Mar 10
Alaska Airlines Logo
6:20 pm - 3:59 pm
IAD
-
HLN
23h 39m2 stops
Alaska Airlines Logo
4:36 pm - 5:27 pm
HLN
-
IAD
22h 51m2 stops
$458Alaska Airlines
Sat, Jan 10 - Tue, Jan 13
Delta Logo
7:05 am - 12:27 pm
IAD
-
HLN
7h 22m1 stop
Delta Logo
5:30 am - 5:17 pm
HLN
-
IAD
9h 47m2 stops
$459Delta
Fri, Mar 6 - Tue, Mar 10
Alaska Airlines Logo
6:20 pm - 3:59 pm
IAD
-
HLN
23h 39m2 stops
Alaska Airlines Logo
4:36 pm - 5:27 pm
HLN
-
IAD
22h 51m2 stops
$478Alaska Airlines
Sat, Jan 31 - Wed, Feb 4
Alaska Airlines Logo
6:00 am - 6:11 pm
IAD
-
HLN
14h 11m2 stops
Alaska Airlines Logo
6:48 pm - 4:26 pm
HLN
-
IAD
19h 38m1 stop
$517Alaska Airlines
Fri, Mar 6 - Tue, Mar 10
Delta Logo
7:05 am - 12:25 pm
IAD
-
HLN
7h 20m1 stop
Delta Logo
12:59 pm - 12:26 am
HLN
-
IAD
9h 27m2 stops
$529Delta
Sat, Jan 31 - Wed, Feb 4
United Airlines Logo
4:11 pm - 9:26 pm
IAD
-
HLN
7h 15m1 stop
United Airlines Logo
2:27 pm - 11:36 am
HLN
-
IAD
19h 09m2 stops
$538United Airlines
Fri, Mar 6 - Tue, Mar 10
Delta Logo
7:05 am - 12:25 pm
IAD
-
HLN
7h 20m1 stop
Delta Logo
12:59 pm - 11:40 pm
HLN
-
IAD
8h 41m1 stop
$549Delta
Booking Insights

KAYAK's insights & trends for Dulles Intl to Helena flights

Get data-powered insights and trends into flights from Dulles Intl to Helena to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Helena?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Helena clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Helena on a Saturday and more expensive on a Wednesday. On your return trip to Washington Dulles Airport, you should consider flying back on a Wednesday, and avoid Tuesdays for better deals.

Good to know

Cheapest flight$354
Flight from Washington Dulles Airport to Helena

When to book flights from Dulles Intl to Helena

Are your dates flexible? Find out the best times to travel from Dulles Intl to Helena based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Helena flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Helena was $354 for a round-trip ticket.

  • Do I need a passport to fly between Washington Dulles Airport and Helena?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Washington Dulles Airport to Helena?

    Washington Dulles Airport and Helena are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at Helena.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Helena?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington Dulles Airport to Helena?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Helena.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Helena?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Helena.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Helena?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Helena from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Helena?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Helena with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and HLN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Helena?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Helena from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Dulles Intl to Helena

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Helena. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Helena? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9095 reviews
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
Airline reviews

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

4.0 OkayAnonymous, Dec 2025
IAD - GRU
Read more United Airlines reviews

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Everything you need to know for your flight from Dulles Intl to Helena

Information on your arrival and departure airports