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Cheap flights from Washington, D.C. to Helena from $242

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Helena departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Washington, D.C. to Helena

Cheap round-trip flights

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
Wed, Oct 29 - Wed, Nov 5
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
$402Alaska 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
Fri, Oct 17 - Tue, Oct 21
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
Wed, Oct 29 - Wed, Nov 5
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
Fri, Oct 17 - Tue, Oct 21
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
Wed, Oct 29 - Wed, Nov 5
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
Fri, Oct 17 - Tue, Oct 21
Delta Logo
12:31 pm - 10:16 pmDCA-HLN
11h 45m2 stops
Delta Logo
5:45 am - 6:59 pmHLN-DCA
11h 14m2 stops
$766Delta
Find Deal
Wed, Oct 29 - Wed, Nov 5

United Airlines flights from Washington, D.C. to Helena

Our best United Airlines deals on Washington, D.C. to Helena flight tickets
United Airlines
Oct 29
BWI8:15 amBaltimore/Washington
7h 12m
1 stop
HLN1:27 pmHelena
Nov 5
HLN2:22 pmHelena
6h 35m
1 stop
BWI10:57 pmBaltimore/Washington
$483
Find similar
United Airlines
Oct 29
BWI6:15 amBaltimore/Washington
9h 12m
2 stops
HLN1:27 pmHelena
Nov 5
HLN2:22 pmHelena
6h 35m
1 stop
BWI10:57 pmBaltimore/Washington
$488
Find similar
United Airlines
Oct 29
IAD10:23 pmWashington, D.C. Dulles Intl
17h 04m
2 stops
HLN1:27 pmHelena
Nov 5
HLN2:22 pmHelena
15h 05m
2 stops
IAD7:27 amWashington, D.C. Dulles Intl
$608
Find similar

Alaska Airlines flights from Washington, D.C. to Helena

Our best Alaska Airlines deals on Washington, D.C. to Helena flight tickets
Alaska Airlines
Oct 17
IAD7:41 pmWashington, D.C. Dulles Intl
24h 00m
1 stop
HLN5:41 pmHelena
Oct 21
HLN6:18 pmHelena
28h 05m
1 stop
IAD12:23 amWashington, D.C. Dulles Intl
$402
Find similar
Alaska Airlines
Oct 17
IAD7:41 pmWashington, D.C. Dulles Intl
24h 00m
1 stop
HLN5:41 pmHelena
Oct 21
HLN6:18 pmHelena
28h 05m
1 stop
IAD12:23 amWashington, D.C. Dulles Intl
$422
Find similar
Alaska Airlines
Oct 17
BWI6:12 pmBaltimore/Washington
25h 29m
1 stop
HLN5:41 pmHelena
Oct 21
HLN6:18 pmHelena
9h 54m
1 stop
BWI6:12 amBaltimore/Washington
$441
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Helena that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Helena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Wed 10/29

7:43 am-5:36 pm

1 stop11h 53m

Helena

Wed 11/5

6:13 pm-6:23 am

1 stop10h 10m

$390

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 10/17

7:41 pm-5:41 pm

1 stop24h 00m

Helena

Tue 10/21

6:18 pm-12:23 am

1 stop28h 05m

$402

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 10/17

7:41 pm-5:41 pm

1 stop24h 00m

Helena

Tue 10/21

6:18 pm-12:23 am

1 stop28h 05m

$422

BaltimoreHelena

BWI - HLN

BWIHLN

Baltimore/Washington

Fri 10/17

6:12 pm-5:41 pm

1 stop25h 29m

Helena

Tue 10/21

6:18 pm-6:12 am

1 stop9h 54m

$441

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Wed 10/29

5:40 pm-5:36 pm

2 stops25h 56m

Helena

Wed 11/5

6:13 pm-6:23 am

1 stop10h 10m

$463

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 10/17

7:41 pm-5:41 pm

1 stop24h 00m

Helena

Tue 10/21

6:18 pm-4:42 pm

2 stops20h 24m

$481

BaltimoreHelena

BWI - HLN

BWIHLN

Baltimore/Washington

Wed 10/29

8:15 am-1:27 pm

1 stop7h 12m

Helena

Wed 11/5

2:22 pm-10:57 pm

1 stop6h 35m

$483

BaltimoreHelena

BWI - HLN

BWIHLN

Baltimore/Washington

Wed 10/29

6:15 am-1:27 pm

2 stops9h 12m

Helena

Wed 11/5

2:22 pm-10:57 pm

1 stop6h 35m

$488

BaltimoreHelena

BWI - HLN

BWIHLN

Baltimore/Washington

Fri 10/17

7:15 am-12:20 pm

1 stop7h 05m

Helena

Tue 10/21

1:00 pm-12:41 am

2 stops9h 41m

$510

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Wed 10/29

12:31 pm-10:16 pm

2 stops11h 45m

Helena

Wed 11/5

5:45 am-6:59 pm

2 stops11h 14m

$766

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Helena from

How to get the cheapest flight ticket from Washington, D.C. to Helena

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Washington, D.C. and Helena?

What is the cheapest day to depart on your flight to Helena?

The cheapest day to depart from Washington, D.C. to Helena is on a Tuesday. Travelers who choose to depart for Helena on a Tuesday will often find tickets for as low as $545. The most expensive day to fly to Helena is Friday, with ticket prices averaging around $1,026.

What is the cheapest time of day to depart on your flight to Helena?

According to our data, the cheapest time of day to fly to Helena is in the morning. momondo users have found flights departing from Washington, D.C. to Helena in the morning for as low as $662. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is in the afternoon when prices are around $723.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Helena according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Helena (WAS to HLN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Helena

Direct flights

None
There are no direct flights from Washington, D.C. to Helena. There are no popular flight routes from Washington, D.C. to Helena.
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  • How far is Washington, D.C. to Helena by plane?

    A flight from Washington, D.C. to Helena will travel around 1835.3 mi. In terms of flight time, this usually takes a little over 6h 39m.

  • When did momondo last update prices for flights from Washington, D.C. to Helena Airport?

    Prices for flights from Washington, D.C. to Helena Airport refresh daily.

  • How many operators does momondo search for flights from Washington, D.C. to Helena Airport?

  • How old do you have to be to fly from Washington, D.C. to Helena Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Helena Airport.

  • What documentation or ID do you need to fly to Helena Airport?

    The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Washington, D.C. to Helena?

Best airlines flying from Washington, D.C. to Helena

Compare and see reviews for airlines that fly from Washington, D.C. to Helena with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $412Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Helena?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Helena from Washington, D.C..

Can I find flights from Washington, D.C. to Helena with flexible booking policies on momondo?

All flight searches from Washington, D.C. to Helena on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Helena?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Helena.

I’m not ready to book a flight from Washington, D.C. to Helena right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington, D.C. to Helena flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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