IAD - HLN

$185 Find Cheap Flights from Washington Dulles Airport to Helena

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Helena departing on 9/8. 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
$349
United Airlines
Tue 9/15Wed 9/30
IAD - HLN • 1 stop
Cheapest one-way
$185
Alaska Airlines
Tue 9/8
IAD - HLN • 1 stop
Top airlines
United Airlines
Cheapest • from $349 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Helena. You'll need at least 1 connection.
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We hope you love your trip to Helena!
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

Tue, Sep 15 - Wed, Sep 30
United Airlines Logo
6:30 am - 1:32 pm
IAD
-
HLN
9h 02m
1 stop
United Airlines Logo
2:35 pm - 12:32 am
HLN
-
IAD
7h 57m
1 stop
$349United Airlines
Tue, Jun 9 - Tue, Jun 23
Delta Logo
10:16 am - 10:31 pm
IAD
-
HLN
14h 15m
2 stops
Delta Logo
1:00 pm - 11:31 pm
HLN
-
IAD
8h 31m
1 stop
$354Delta
Wed, Sep 16 - Wed, Sep 30
Alaska Airlines Logo
5:54 pm - 4:41 pm
IAD
-
HLN
24h 47m
1 stop
Alaska Airlines Logo
5:18 pm - 5:40 am
HLN
-
IAD
10h 22m
1 stop
$369Alaska Airlines
Sat, Sep 12 - Thu, Sep 24
United Airlines Logo
6:30 am - 1:32 pm
IAD
-
HLN
9h 02m
1 stop
United Airlines Logo
2:35 pm - 12:32 am
HLN
-
IAD
7h 57m
1 stop
$371United Airlines
Thu, May 28 - Sat, Jun 6
Delta Logo
6:00 am - 12:23 pm
IAD
-
HLN
8h 23m
2 stops
Delta Logo
1:03 pm - 11:32 pm
HLN
-
IAD
8h 29m
1 stop
$374Delta
Mon, May 25 - Wed, Jun 3
Delta Logo
6:00 am - 12:23 pm
IAD
-
HLN
8h 23m
2 stops
Delta Logo
5:45 am - 6:15 pm
HLN
-
IAD
10h 30m
2 stops
$379Delta
Thu, May 28 - Wed, Jun 3
Delta Logo
7:30 am - 12:23 pm
IAD
-
HLN
6h 53m
1 stop
Delta Logo
1:03 pm - 11:32 pm
HLN
-
IAD
8h 29m
1 stop
$394Delta
Mon, May 25 - Wed, Jun 3
Delta Logo
6:00 am - 12:23 pm
IAD
-
HLN
8h 23m
2 stops
Delta Logo
1:03 pm - 11:32 pm
HLN
-
IAD
8h 29m
1 stop
$399Delta
Sat, Sep 19 - Fri, Oct 2
United Airlines Logo
2:43 pm - 9:16 pm
IAD
-
HLN
8h 33m
1 stop
United Airlines Logo
2:35 pm - 11:19 pm
HLN
-
IAD
6h 44m
1 stop
$402United Airlines
Tue, Sep 15 - Tue, Sep 29
Delta Logo
7:15 am - 12:23 pm
IAD
-
HLN
7h 08m
1 stop
Delta Logo
5:45 am - 5:58 pm
HLN
-
IAD
10h 13m
2 stops
$408Delta
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.

Which airlines provide the cheapest flights from Washington Dulles Airport to Helena?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington Dulles Airport to Helena were found on United Airlines ($349) and Delta ($354).

Find deals

Good to know

Cheapest flight$185
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 $185 for a one-way ticket and $349 for a round-trip.

  • 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 9678 reviews
7.1Entertainment
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
Airline reviews

Vegetarian selection could be better. Bread was too hard to chew.

8.0 ExcellentAnonymous, Apr 2026
IAD - FRA
Read more United Airlines reviews

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

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

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Helena (HLN)