Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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 8/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:00 am - 2:56 pm
HLN
-
DCA
5h 56m
1 stop
United Airlines Logo
4:07 pm - 8:59 pm
DCA
-
HLN
6h 52m
1 stop
$514United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
7:00 am - 2:56 pm
HLN
-
DCA
5h 56m
1 stop
United Airlines Logo
6:00 am - 8:59 pm
DCA
-
HLN
16h 59m
2 stops
$552United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
7:00 am - 2:56 pm
HLN
-
DCA
5h 56m
1 stop
United Airlines Logo
4:07 pm - 8:59 pm
DCA
-
HLN
6h 52m
1 stop
$579United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
7:00 am - 2:56 pm
HLN
-
DCA
5h 56m
1 stop
United Airlines Logo
8:30 am - 8:59 pm
DCA
-
HLN
14h 29m
2 stops
$617United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
2:30 pm - 11:45 am
HLN
-
DCA
19h 15m
3 stops
United Airlines Logo
4:07 pm - 8:59 pm
DCA
-
HLN
6h 52m
1 stop
$668United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
2:30 pm - 8:19 am
HLN
-
DCA
15h 49m
2 stops
United Airlines Logo
8:30 am - 8:59 pm
DCA
-
HLN
14h 29m
2 stops
$677United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
2:30 pm - 11:45 am
HLN
-
DCA
19h 15m
3 stops
United Airlines Logo
8:30 am - 8:59 pm
DCA
-
HLN
14h 29m
2 stops
$707United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
2:30 pm - 11:45 am
HLN
-
DCA
19h 15m
3 stops
United Airlines Logo
7:00 am - 8:59 pm
DCA
-
HLN
15h 59m
2 stops
$767United Airlines
Sat, Dec 5 - Tue, Dec 8
Alaska Airlines Logo
5:09 pm - 9:00 pm
HLN
-
DCA
25h 51m
2 stops
Alaska Airlines Logo
10:59 am - 4:55 pm
DCA
-
HLN
31h 56m
2 stops
$897Alaska Airlines
Sun, Aug 16 - Thu, Aug 20
Alaska Airlines Logo
5:09 pm - 9:00 pm
HLN
-
DCA
25h 51m
2 stops
Alaska Airlines Logo
5:00 pm - 4:55 pm
DCA
-
HLN
25h 55m
1 stop
$926Alaska Airlines
Sun, Aug 16 - Thu, Aug 20

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

United Airlines flights from Helena to Washington, D.C. Reagan-National Airport

Our best United Airlines deals on Helena to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Dec 5
HLN7:00 amHelena
5h 56m
1 stop
DCA2:56 pmWashington, D.C. Reagan-National
Dec 8
DCA4:07 pmWashington, D.C. Reagan-National
6h 52m
1 stop
HLN8:59 pmHelena
$514
United Airlines
Dec 5
HLN7:00 amHelena
5h 56m
1 stop
DCA2:56 pmWashington, D.C. Reagan-National
Dec 8
DCA6:00 amWashington, D.C. Reagan-National
16h 59m
2 stops
HLN8:59 pmHelena
$552
United Airlines
Dec 5
HLN7:00 amHelena
5h 56m
1 stop
DCA2:56 pmWashington, D.C. Reagan-National
Dec 8
DCA4:07 pmWashington, D.C. Reagan-National
6h 52m
1 stop
HLN8:59 pmHelena
$579

Alaska Airlines flights from Helena to Washington, D.C. Reagan-National Airport

Our best Alaska Airlines deals on Helena to Washington, D.C. Reagan-National Airport flight tickets
Alaska Airlines
Aug 16
HLN5:09 pmHelena
25h 51m
2 stops
DCA9:00 pmWashington, D.C. Reagan-National
Aug 20
DCA10:59 amWashington, D.C. Reagan-National
31h 56m
2 stops
HLN4:55 pmHelena
$897
Alaska Airlines
Aug 16
HLN5:09 pmHelena
25h 51m
2 stops
DCA9:00 pmWashington, D.C. Reagan-National
Aug 20
DCA5:00 pmWashington, D.C. Reagan-National
25h 55m
1 stop
HLN4:55 pmHelena
$926
Alaska Airlines
Aug 16
HLN5:09 pmHelena
21h 07m
1 stop
DCA4:16 pmWashington, D.C. Reagan-National
Aug 20
DCA5:00 pmWashington, D.C. Reagan-National
25h 55m
1 stop
HLN4:55 pmHelena
$1,082

momondo Fare Finder

 
Customize your flight search to find flights from Helena to Washington, D.C. Reagan-National Airport 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 June 30, 2026.
Use the filters below to find and compare flights from Helena to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

7:00 am-2:56 pm

1 stop5h 56m

Washington, D.C. Reagan-National

Tue 12/8

4:07 pm-8:59 pm

1 stop6h 52m

$514

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

7:00 am-2:56 pm

1 stop5h 56m

Washington, D.C. Reagan-National

Tue 12/8

6:00 am-8:59 pm

2 stops16h 59m

$552

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

7:00 am-2:56 pm

1 stop5h 56m

Washington, D.C. Reagan-National

Tue 12/8

4:07 pm-8:59 pm

1 stop6h 52m

$579

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

7:00 am-2:56 pm

1 stop5h 56m

Washington, D.C. Reagan-National

Tue 12/8

8:30 am-8:59 pm

2 stops14h 29m

$617

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

2:30 pm-11:45 am

3 stops19h 15m

Washington, D.C. Reagan-National

Tue 12/8

4:07 pm-8:59 pm

1 stop6h 52m

$668

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

2:30 pm-8:19 am

2 stops15h 49m

Washington, D.C. Reagan-National

Tue 12/8

8:30 am-8:59 pm

2 stops14h 29m

$677

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

2:30 pm-11:45 am

3 stops19h 15m

Washington, D.C. Reagan-National

Tue 12/8

8:30 am-8:59 pm

2 stops14h 29m

$707

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 12/5

2:30 pm-11:45 am

3 stops19h 15m

Washington, D.C. Reagan-National

Tue 12/8

7:00 am-8:59 pm

2 stops15h 59m

$767

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sun 8/16

5:09 pm-9:00 pm

2 stops25h 51m

Washington, D.C. Reagan-National

Thu 8/20

10:59 am-4:55 pm

2 stops31h 56m

$897

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sun 8/16

5:09 pm-9:00 pm

2 stops25h 51m

Washington, D.C. Reagan-National

Thu 8/20

5:00 pm-4:55 pm

1 stop25h 55m

$926

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Helena to Washington, D.C. Reagan-National Airport

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 Helena to Washington, D.C. Reagan-National?

Delta and United Airlines are the most popular carriers operating from Helena to Washington, D.C. Reagan-National

What airlines fly to Washington, D.C. Reagan-National Airport?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from Helena according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.

When to book flights from Helena to Washington, D.C. Reagan-National Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to Washington, D.C. Reagan-National Airport 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. Reagan-National Airport (HLN to DCA) flight deals and tips

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

Fastest flight time

5h 56m

Direct flights

None
The fastest flight from Helena to Washington, D.C. Reagan-National Airport takes 5h 56m
There are no direct flights from Helena to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Helena to Washington, D.C. Reagan-National Airport.
Search flight deals

Frequently asked questions about flying from Helena to Washington, D.C. Reagan-National Airport

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

    Helena and Washington, D.C. Reagan-National are 1837.0 mi apart from one another. In terms of flight time, this usually takes a little over 5h 56m.

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

    Prices for flights from Helena Airport to Washington, D.C. Reagan-National Airport are refreshed on a daily basis.

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

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

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

    The travel and health documents required for your trip to Washington, D.C. Reagan-National Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Reagan-National Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Helena to Washington, D.C. Reagan-National Airport

Compare and see reviews for airlines that fly from Helena to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $503Free CancellationRating
7.4
9,894 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
Arlington
Gettysburg
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Colonial Beach
Towson
Manassas
Silver Spring
Tysons
Springfield
Bethesda
Fairfax
Glen Burnie

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Helena to Washington, D.C.. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Helena to Washington, D.C. flights to just show those with flexible booking policies.

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 simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Helena and alert you when they change.

An easier way to manage your Washington, D.C. Reagan-National Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 7/30
Thu 8/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington, D.C.