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Cheap flights from Helena to Washington, D.C. from $180

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to Washington, D.C. departing on 7/3. 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 Helena to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
4:43 pm - 7:34 am
HLN
-
IAD
12h 51m
1 stop
Alaska Airlines Logo
6:00 am - 4:06 pm
IAD
-
HLN
12h 06m
1 stop
$349Alaska Airlines
Mon, Jun 1 - Wed, Jun 3
Delta Logo
5:45 am - 7:45 pm
HLN
-
DCA
12h 00m
2 stops
Delta Logo
6:05 am - 12:23 pm
DCA
-
HLN
8h 18m
2 stops
$413Delta
Sat, May 30 - Wed, Jun 3
United Airlines Logo
2:20 pm - 12:45 am
HLN
-
IAD
8h 25m
1 stop
United Airlines Logo
6:30 am - 1:33 pm
IAD
-
HLN
9h 03m
1 stop
$419United Airlines
Thu, May 21 - Mon, May 25
United Airlines Logo
6:15 am - 5:32 pm
HLN
-
IAD
9h 17m
1 stop
United Airlines Logo
6:30 am - 1:33 pm
IAD
-
HLN
9h 03m
1 stop
$436United Airlines
Wed, May 20 - Sun, May 24
Alaska Airlines Logo
4:43 pm - 7:34 am
HLN
-
IAD
12h 51m
1 stop
Alaska Airlines Logo
6:00 am - 4:06 pm
IAD
-
HLN
12h 06m
1 stop
$459Alaska Airlines
Sun, May 31 - Wed, Jun 3
Alaska Airlines Logo
4:43 pm - 5:42 pm
HLN
-
IAD
22h 59m
2 stops
Alaska Airlines Logo
6:00 am - 4:06 pm
IAD
-
HLN
12h 06m
1 stop
$471Alaska Airlines
Mon, Jun 1 - Wed, Jun 3
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
IAD
22h 56m
2 stops
Alaska Airlines Logo
7:00 am - 4:41 pm
IAD
-
HLN
11h 41m
1 stop
$495Alaska Airlines
Tue, Sep 8 - Fri, Sep 11
Alaska Airlines Logo
5:09 pm - 6:39 am
HLN
-
IAD
11h 30m
1 stop
Alaska Airlines Logo
6:03 am - 4:32 pm
IAD
-
HLN
12h 29m
1 stop
$509Alaska Airlines
Fri, Jul 17 - Mon, Jul 20
Delta Logo
1:03 pm - 11:32 pm
HLN
-
IAD
8h 29m
1 stop
Delta Logo
7:30 am - 12:23 pm
IAD
-
HLN
6h 53m
1 stop
$512Delta
Sat, May 30 - Wed, Jun 3
Alaska Airlines Logo
5:09 pm - 6:39 am
HLN
-
IAD
11h 30m
1 stop
Alaska Airlines Logo
6:14 pm - 4:32 pm
IAD
-
HLN
24h 18m
1 stop
$514Alaska Airlines
Wed, Jul 1 - Fri, Jul 3

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

Our best Alaska Airlines deals on Helena to Washington, D.C. flight tickets
Alaska Airlines
Jun 1
HLN4:43 pmHelena
12h 51m
1 stop
IAD7:34 amWashington, D.C. Dulles Intl
Jun 3
IAD6:00 amWashington, D.C. Dulles Intl
12h 06m
1 stop
HLN4:06 pmHelena
$349
Alaska Airlines
May 31
HLN4:43 pmHelena
12h 51m
1 stop
IAD7:34 amWashington, D.C. Dulles Intl
Jun 3
IAD6:00 amWashington, D.C. Dulles Intl
12h 06m
1 stop
HLN4:06 pmHelena
$459
Alaska Airlines
Jun 1
HLN4:43 pmHelena
22h 59m
2 stops
IAD5:42 pmWashington, D.C. Dulles Intl
Jun 3
IAD6:00 amWashington, D.C. Dulles Intl
12h 06m
1 stop
HLN4:06 pmHelena
$471

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

Our best United Airlines deals on Helena to Washington, D.C. flight tickets
United Airlines
May 21
HLN2:20 pmHelena
8h 25m
1 stop
IAD12:45 amWashington, D.C. Dulles Intl
May 25
IAD6:30 amWashington, D.C. Dulles Intl
9h 03m
1 stop
HLN1:33 pmHelena
$419
United Airlines
May 20
HLN6:15 amHelena
9h 17m
1 stop
IAD5:32 pmWashington, D.C. Dulles Intl
May 24
IAD6:30 amWashington, D.C. Dulles Intl
9h 03m
1 stop
HLN1:33 pmHelena
$436
United Airlines
May 19
HLN2:30 pmHelena
6h 57m
1 stop
BWI11:27 pmBaltimore/Washington
May 23
BWI8:30 amBaltimore/Washington
7h 03m
1 stop
HLN1:33 pmHelena
$680

momondo Fare Finder

 
Customize your flight search to find flights from Helena to Washington, D.C. 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 May 8, 2026.
Use the filters below to find and compare flights from Helena to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Mon 6/1

4:43 pm-7:34 am

1 stop12h 51m

Washington, D.C. Dulles Intl

Wed 6/3

6:00 am-4:06 pm

1 stop12h 06m

$349

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 5/30

5:45 am-7:45 pm

2 stops12h 00m

Washington, D.C. Reagan-National

Wed 6/3

6:05 am-12:23 pm

2 stops8h 18m

$413

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 5/21

2:20 pm-12:45 am

1 stop8h 25m

Washington, D.C. Dulles Intl

Mon 5/25

6:30 am-1:33 pm

1 stop9h 03m

$419

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 5/20

6:15 am-5:32 pm

1 stop9h 17m

Washington, D.C. Dulles Intl

Sun 5/24

6:30 am-1:33 pm

1 stop9h 03m

$436

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sun 5/31

4:43 pm-7:34 am

1 stop12h 51m

Washington, D.C. Dulles Intl

Wed 6/3

6:00 am-4:06 pm

1 stop12h 06m

$459

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Mon 6/1

4:43 pm-5:42 pm

2 stops22h 59m

Washington, D.C. Dulles Intl

Wed 6/3

6:00 am-4:06 pm

1 stop12h 06m

$471

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 9/8

5:18 pm-6:14 pm

2 stops22h 56m

Washington, D.C. Dulles Intl

Fri 9/11

7:00 am-4:41 pm

1 stop11h 41m

$495

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Fri 7/17

5:09 pm-6:39 am

1 stop11h 30m

Washington, D.C. Dulles Intl

Mon 7/20

6:03 am-4:32 pm

1 stop12h 29m

$509
Quickest round-trip

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sat 5/30

1:03 pm-11:32 pm

1 stop8h 29m

Washington, D.C. Dulles Intl

Wed 6/3

7:30 am-12:23 pm

1 stop6h 53m

$512

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 7/1

5:09 pm-6:39 am

1 stop11h 30m

Washington, D.C. Dulles Intl

Fri 7/3

6:14 pm-4:32 pm

1 stop24h 18m

$514

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

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 Helena and Washington, D.C.?

Can stopping save me money on Helena to Washington, D.C. flights?

You could potentially save up to 8% on your flight if you consider stops on a Helena to Washington, D.C. flight.

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

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

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

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

Fastest flight time

6h 44m

Direct flights

None
The fastest flight from Helena to Washington, D.C. takes 6h 44m
There are no direct flights from Helena to Washington, D.C.. There are no popular flight routes from Helena to Washington, D.C..
Search flight deals

Frequently asked questions about flying from Helena to Washington, D.C.

  • How far is Helena to Washington, D.C. by plane?

    There are 1835.3 mi between Helena and Washington, D.C.. In terms of flight time, this usually takes a little over 6h 44m.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Helena Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The required travel and health documents for your Washington, D.C. 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 Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Compare and see reviews for airlines that fly from Helena to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $348Free CancellationRating
7.4
9,694 reviews
Search United Airlines flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Waldorf
Woodbridge
Laurel
Colonial Beach
Gaithersburg
Towson
Fredericksburg
Silver Spring
Rockville
Manassas
Linthicum Heights
Tysons
Bethesda
Springfield
Fairfax
College Park

Why use momondo?

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

Finding the right flight to Washington, D.C. from Helena is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Washington, D.C. from Helena which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Helena and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Helena to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport