WAS - HLN

$187 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Helena departing on 2/25. 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
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$334
United Airlines
Wed 2/4Mon 2/9
BWI - HLN • 1 stop
Cheapest one-way
$187
Alaska Airlines
Wed 2/25
BWI - HLN • 1 stop
Top airlines
United Airlines
Cheapest • from $334 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Helena!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Helena (WAS-HLN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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 Washington, D.C. to Helena

Wed, Feb 4 - Mon, Feb 9
United Airlines Logo
4:10 pm - 9:26 pm
BWI
-
HLN
7h 16m
1 stop
United Airlines Logo
2:27 pm - 11:15 pm
HLN
-
BWI
6h 48m
1 stop
$334United Airlines
Wed, Feb 4 - Mon, Feb 9
United Airlines Logo
2:31 pm - 9:26 pm
IAD
-
HLN
8h 55m
1 stop
United Airlines Logo
2:27 pm - 11:22 pm
HLN
-
IAD
6h 55m
1 stop
$334United Airlines
Wed, Feb 4 - Mon, Feb 9
United Airlines Logo
10:05 am - 9:26 pm
BWI
-
HLN
13h 21m
2 stops
United Airlines Logo
2:27 pm - 11:15 pm
HLN
-
BWI
6h 48m
1 stop
$339United Airlines
Wed, Feb 4 - Sun, Feb 8
United Airlines Logo
4:10 pm - 9:26 pm
BWI
-
HLN
7h 16m
1 stop
United Airlines Logo
2:27 pm - 11:15 pm
HLN
-
BWI
6h 48m
1 stop
$359United Airlines
Fri, Mar 6 - Tue, Mar 10
Alaska Airlines Logo
6:20 pm - 3:59 pm
IAD
-
HLN
23h 39m
2 stops
Alaska Airlines Logo
4:36 pm - 5:20 pm
HLN
-
IAD
22h 44m
1 stop
$409Alaska Airlines
Fri, Mar 6 - Tue, Mar 10
Alaska Airlines Logo
6:20 pm - 3:59 pm
IAD
-
HLN
23h 39m
2 stops
Alaska Airlines Logo
4:36 pm - 5:27 pm
HLN
-
IAD
22h 51m
2 stops
$413Alaska Airlines
Wed, Feb 4 - Mon, Feb 9
Delta Logo
7:15 pm - 12:27 pm
DCA
-
HLN
19h 12m
2 stops
Delta Logo
1:10 pm - 6:57 pm
HLN
-
DCA
27h 47m
2 stops
$498Delta
Wed, Feb 4 - Mon, Feb 9
Delta Logo
5:10 pm - 10:29 pm
DCA
-
HLN
7h 19m
1 stop
Delta Logo
1:10 pm - 12:00 pm
HLN
-
DCA
20h 50m
2 stops
$548Delta
Tue, Jun 16 - Sat, Jun 27
Delta Logo
5:00 pm - 10:34 pm
DCA
-
HLN
7h 34m
1 stop
Delta Logo
12:50 pm - 8:37 am
HLN
-
DCA
17h 47m
2 stops
$563Delta
Wed, Feb 4 - Sun, Feb 8
Alaska Airlines Logo
5:01 pm - 6:11 pm
DCA
-
HLN
27h 10m
1 stop
Alaska Airlines Logo
6:48 pm - 9:00 pm
HLN
-
DCA
24h 12m
2 stops
$571Alaska Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Helena flights

Get data-powered insights and trends into flights from Washington, D.C. 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, D.C. 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, D.C. to Helena were found on United Airlines ($334) and Alaska Airlines ($409).

Good to know

Low seasonApril
Best time to beat the crowds with an average 46% drop in price.
Most popular time to fly with an average 76% increase in price.

When to book flights from Washington, D.C. to Helena

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 flights from Washington, D.C. to Helena

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Helena was $187 for a one-way ticket and $334 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Helena?

    A passport is not required to fly from Washington, D.C. to Helena.

  • Which airports will I be using when flying from Washington, D.C. to Helena?

    When flying out of Washington, D.C. you will be using one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be landing at Helena.

  • Which aircraft models fly most regularly from Washington, D.C. to Helena?

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

  • How does KAYAK find such low prices on flights from Washington, D.C. 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, D.C. to Helena.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Helena from Washington, D.C. 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, D.C. 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, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. 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, D.C. 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 Washington, D.C. 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 Washington, D.C. 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 9183 reviews
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
Airline reviews

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.

10.0 ExcellentAnonymous, Jan 2026
IAD - ATL
Read more United Airlines reviews

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.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

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.

Everything you need to know for your flight from Washington, D.C. to Helena

Information on your arrival and departure airports