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Cheap flights from Washington, D.C. to Helena from $160

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 2/27. 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

Enter your travel dates to find the best prices.
Alaska Airlines Logo
9:00 am - 5:45 pm
IAD
-
HLN
10h 45m
1 stop
Alaska Airlines Logo
6:22 pm - 5:50 am
HLN
-
IAD
9h 28m
1 stop
$309Alaska Airlines
Tue, May 5 - Thu, May 7
Alaska Airlines Logo
9:00 am - 5:45 pm
IAD
-
HLN
10h 45m
1 stop
Alaska Airlines Logo
6:22 pm - 5:50 am
HLN
-
IAD
9h 28m
1 stop
$354Alaska Airlines
Sun, May 3 - Thu, May 7
United Airlines Logo
4:10 pm - 9:26 pm
BWI
-
HLN
7h 16m
1 stop
United Airlines Logo
2:25 pm - 11:25 pm
HLN
-
BWI
7h 00m
1 stop
$359United Airlines
Wed, Feb 11 - Sun, Feb 15
United Airlines Logo
2:37 pm - 9:46 pm
IAD
-
HLN
9h 09m
1 stop
United Airlines Logo
6:15 am - 5:32 pm
HLN
-
IAD
9h 17m
1 stop
$359United Airlines
Tue, May 5 - Sat, May 9
Delta Logo
6:50 pm - 12:24 pm
IAD
-
HLN
19h 34m
2 stops
Delta Logo
12:50 pm - 11:51 pm
HLN
-
IAD
9h 01m
1 stop
$363Delta
Mon, May 4 - Sat, May 9
Alaska Airlines Logo
7:04 am - 5:45 pm
BWI
-
HLN
12h 41m
1 stop
Alaska Airlines Logo
6:22 pm - 5:44 am
HLN
-
BWI
9h 22m
1 stop
$366Alaska Airlines
Tue, May 5 - Thu, May 7
United Airlines Logo
2:12 pm - 9:25 pm
IAD
-
HLN
9h 13m
1 stop
United Airlines Logo
2:30 pm - 11:20 pm
HLN
-
IAD
6h 50m
1 stop
$379United Airlines
Fri, Mar 6 - Tue, Mar 10
United Airlines Logo
6:35 am - 1:27 pm
IAD
-
HLN
8h 52m
1 stop
United Airlines Logo
2:30 pm - 12:32 am
HLN
-
IAD
8h 02m
1 stop
$404United Airlines
Sun, May 24 - Sat, May 30
Delta Logo
5:00 pm - 12:24 pm
DCA
-
HLN
21h 24m
2 stops
Delta Logo
12:50 pm - 10:26 am
HLN
-
DCA
19h 36m
2 stops
$443Delta
Mon, May 4 - Sat, May 9
Delta Logo
7:15 am - 12:24 pm
BWI
-
HLN
7h 09m
1 stop
Delta Logo
12:50 pm - 12:15 am
HLN
-
BWI
9h 25m
2 stops
$444Delta
Tue, May 5 - Sat, May 9

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

Our best Alaska Airlines deals on Washington, D.C. to Helena flight tickets
Alaska Airlines
May 5
IAD9:00 amWashington, D.C. Dulles Intl
10h 45m
1 stop
HLN5:45 pmHelena
May 7
HLN6:22 pmHelena
9h 28m
1 stop
IAD5:50 amWashington, D.C. Dulles Intl
$309
Alaska Airlines
May 3
IAD9:00 amWashington, D.C. Dulles Intl
10h 45m
1 stop
HLN5:45 pmHelena
May 7
HLN6:22 pmHelena
9h 28m
1 stop
IAD5:50 amWashington, D.C. Dulles Intl
$354
Alaska Airlines
May 5
BWI7:04 amBaltimore/Washington
12h 41m
1 stop
HLN5:45 pmHelena
May 7
HLN6:22 pmHelena
9h 22m
1 stop
BWI5:44 amBaltimore/Washington
$366

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

Our best United Airlines deals on Washington, D.C. to Helena flight tickets
United Airlines
Feb 11
BWI4:10 pmBaltimore/Washington
7h 16m
1 stop
HLN9:26 pmHelena
Feb 15
HLN2:25 pmHelena
7h 00m
1 stop
BWI11:25 pmBaltimore/Washington
$359
United Airlines
Mar 6
IAD2:12 pmWashington, D.C. Dulles Intl
9h 13m
1 stop
HLN9:25 pmHelena
Mar 10
HLN2:30 pmHelena
6h 50m
1 stop
IAD11:20 pmWashington, D.C. Dulles Intl
$379
United Airlines
May 24
IAD6:35 amWashington, D.C. Dulles Intl
8h 52m
1 stop
HLN1:27 pmHelena
May 30
HLN2:30 pmHelena
8h 02m
1 stop
IAD12:32 amWashington, D.C. Dulles Intl
$404

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 January 29, 2026.
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

Tue 5/5

9:00 am-5:45 pm

1 stop10h 45m

Helena

Thu 5/7

6:22 pm-5:50 am

1 stop9h 28m

$309

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Sun 5/3

9:00 am-5:45 pm

1 stop10h 45m

Helena

Thu 5/7

6:22 pm-5:50 am

1 stop9h 28m

$354

BaltimoreHelena

BWI - HLN

BWIHLN

Baltimore/Washington

Wed 2/11

4:10 pm-9:26 pm

1 stop7h 16m

Helena

Sun 2/15

2:25 pm-11:25 pm

1 stop7h 00m

$359

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Tue 5/5

2:37 pm-9:46 pm

1 stop9h 09m

Helena

Sat 5/9

6:15 am-5:32 pm

1 stop9h 17m

$359

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Mon 5/4

6:50 pm-12:24 pm

2 stops19h 34m

Helena

Sat 5/9

12:50 pm-11:51 pm

1 stop9h 01m

$363

BaltimoreHelena

BWI - HLN

BWIHLN

Baltimore/Washington

Tue 5/5

7:04 am-5:45 pm

1 stop12h 41m

Helena

Thu 5/7

6:22 pm-5:44 am

1 stop9h 22m

$366

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Fri 3/6

2:12 pm-9:25 pm

1 stop9h 13m

Helena

Tue 3/10

2:30 pm-11:20 pm

1 stop6h 50m

$379

Washington, D.C.Helena

IAD - HLN

IADHLN

Washington, D.C. Dulles Intl

Sun 5/24

6:35 am-1:27 pm

1 stop8h 52m

Helena

Sat 5/30

2:30 pm-12:32 am

1 stop8h 02m

$404

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Mon 5/4

5:00 pm-12:24 pm

2 stops21h 24m

Helena

Sat 5/9

12:50 pm-10:26 am

2 stops19h 36m

$443

BaltimoreHelena

BWI - HLN

BWIHLN

Baltimore/Washington

Tue 5/5

7:15 am-12:24 pm

1 stop7h 09m

Helena

Sat 5/9

12:50 pm-12:15 am

2 stops9h 25m

$444

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 cheapest airline that flies from Washington, D.C. to Helena?

Alaska Airlines and United Airlines are the most popular carriers operating from Washington, D.C. to Helena

What airlines fly to Helena?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Helena from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 5 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

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

Fastest flight time

7h 08m

Direct flights

None
The fastest flight from Washington, D.C. to Helena takes 7h 08m
There are no direct flights from Washington, D.C. to Helena. There are no popular flight routes from Washington, D.C. to Helena.
Search flight deals

  • 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 7h 08m.

  • 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
9,215 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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