WAS - HLN

$242 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 10/15. 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

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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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, Oct 29 - Wed, Nov 5
Hawaiian Airlines Logo
7:43 am - 5:36 pmIAD-HLN
11h 53m1 stop
Hawaiian Airlines Logo
6:13 pm - 6:23 amHLN-IAD
10h 10m1 stop
$390Hawaiian Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
Alaska Airlines Logo
7:41 pm - 5:41 pmIAD-HLN
24h 00m1 stop
Alaska Airlines Logo
6:18 pm - 12:23 amHLN-IAD
28h 05m1 stop
$422Alaska Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
Alaska Airlines Logo
6:12 pm - 5:41 pmBWI-HLN
25h 29m1 stop
Alaska Airlines Logo
6:18 pm - 6:12 amHLN-BWI
9h 54m1 stop
$441Alaska Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
Alaska Airlines Logo
5:40 pm - 5:36 pmIAD-HLN
25h 56m2 stops
Alaska Airlines Logo
6:13 pm - 6:23 amHLN-IAD
10h 10m1 stop
$463Alaska Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
Alaska Airlines Logo
7:41 pm - 5:41 pmIAD-HLN
24h 00m1 stop
Alaska Airlines Logo
6:18 pm - 4:42 pmHLN-IAD
20h 24m2 stops
$481Alaska Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
United Airlines Logo
8:15 am - 1:27 pmBWI-HLN
7h 12m1 stop
United Airlines Logo
2:22 pm - 10:57 pmHLN-BWI
6h 35m1 stop
$483United Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
United Airlines Logo
6:15 am - 1:27 pmBWI-HLN
9h 12m2 stops
United Airlines Logo
2:22 pm - 10:57 pmHLN-BWI
6h 35m1 stop
$488United Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
Alaska Airlines Logo
6:25 am - 5:41 pmIAD-HLN
13h 16m1 stop
Alaska Airlines Logo
6:18 pm - 4:42 pmHLN-IAD
20h 24m2 stops
$491Alaska Airlines
Find Deal
Fri, Oct 17 - Tue, Oct 21
Delta Logo
7:15 am - 12:20 pmBWI-HLN
7h 05m1 stop
Delta Logo
1:00 pm - 12:41 amHLN-BWI
9h 41m2 stops
$510Delta
Find Deal
Tue, Sep 30 - Sat, Oct 4
Delta Logo
12:30 pm - 10:14 pmDCA-HLN
11h 44m2 stops
Delta Logo
5:45 am - 4:11 pmHLN-DCA
8h 26m1 stop
$742Delta
Find Deal

Everything you should know

Top airlines
Hawaiian Airlines
Cheapest • from $390 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$390
Hawaiian Airlines
Wed 10/29Wed 11/5
IAD - HLN • 1 stop
Cheapest one-way
$242
United Airlines
Wed 10/15
BWI - HLN • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Helena!
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.

How much is a round-trip flight from Washington, D.C. to Helena?

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.

Good to know

Low seasonApril
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly with an average 64% 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 $242 for a one-way ticket and $390 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.

  • Which airline alliances offer flights from Washington, D.C. to Helena?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Washington, D.C. and Helena, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Washington, D.C. to Helena, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Helena are Delta and United Airlines. With an average price for the route of $624 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $588 and an overall rating of 7.4.

  • 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 airlines 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.
7.9
DeltaOverall score based on 7954 reviews
8.2Boarding
8.5Crew
7.9Entertainment
7.3Food
7.9Comfort
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

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.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

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

Information on your arrival and departure airports

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