WAS - HLN

$364 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 12/6. 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
$436
Delta
Wed 1/28Thu 1/29
BWI - HLN • 1 stop
Cheapest one-way
$364
Delta
Sat 12/6
BWI - HLN • 1 stop
Top airlines
Delta
Cheapest • from $436 (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, Jan 28 - Thu, Jan 29
Delta Logo
7:00 am - 12:27 pmBWI-HLN
7h 27m1 stop
Delta Logo
1:10 pm - 12:41 amHLN-BWI
9h 31m2 stops
$436Delta
Find Deal
Wed, Jan 28 - Thu, Jan 29
Delta Logo
7:00 am - 12:27 pmBWI-HLN
7h 27m1 stop
Delta Logo
1:10 pm - 12:41 amHLN-BWI
9h 31m2 stops
$469Delta
Find Deal
Fri, Mar 6 - Tue, Mar 10
Alaska Airlines Logo
6:27 pm - 3:59 pmIAD-HLN
23h 32m1 stop
Alaska Airlines Logo
4:36 pm - 5:27 pmHLN-IAD
22h 51m2 stops
$473Alaska Airlines
Find Deal
Fri, Mar 6 - Tue, Mar 10
Alaska Airlines Logo
6:20 pm - 3:59 pmIAD-HLN
23h 39m2 stops
Alaska Airlines Logo
4:36 pm - 5:27 pmHLN-IAD
22h 51m2 stops
$476Alaska Airlines
Find Deal
Fri, Mar 6 - Tue, Mar 10
Alaska Airlines Logo
6:20 pm - 3:59 pmIAD-HLN
23h 39m2 stops
Alaska Airlines Logo
4:36 pm - 5:27 pmHLN-IAD
22h 51m2 stops
$477Alaska Airlines
Find Deal
Wed, Jan 28 - Thu, Jan 29
Delta Logo
10:33 am - 10:29 pmBWI-HLN
13h 56m2 stops
Delta Logo
1:10 pm - 12:41 amHLN-BWI
9h 31m2 stops
$516Delta
Find Deal
Wed, Jan 28 - Thu, Jan 29
United Airlines Logo
8:23 am - 1:41 pmBWI-HLN
7h 18m1 stop
United Airlines Logo
2:27 pm - 11:15 pmHLN-BWI
6h 48m1 stop
$521United Airlines
Find Deal
Fri, Mar 6 - Tue, Mar 10
United Airlines Logo
2:12 pm - 9:25 pmIAD-HLN
9h 13m1 stop
United Airlines Logo
6:15 am - 4:40 pmHLN-IAD
8h 25m1 stop
$531United Airlines
Find Deal
Wed, Jan 28 - Thu, Jan 29
United Airlines Logo
10:05 am - 9:26 pmBWI-HLN
13h 21m2 stops
United Airlines Logo
2:27 pm - 9:21 pmHLN-BWI
28h 54m2 stops
$533United Airlines
Find Deal
Mon, Dec 15 - Thu, Dec 18
United Airlines Logo
4:05 pm - 9:22 pmDCA-HLN
7h 17m1 stop
United Airlines Logo
6:10 am - 2:59 pmHLN-DCA
6h 49m1 stop
$551United Airlines
Find Deal
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.

What’s the cheapest day of the week to fly from Washington, D.C. to Helena?

The average price of all round-trip flights from Washington, D.C. 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, D.C., you should consider flying back on a Wednesday, and avoid Tuesdays for better deals.

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 $364 for a one-way ticket and $436 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 9019 reviews
8.1Crew
7.7Boarding
7.3Comfort
7.1Entertainment
6.6Food
Airline reviews

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.

10.0 ExcellentDavid, Nov 2025IAD - BTV
Read more United Airlines reviews

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

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

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

Information on your arrival and departure airports