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Cheap flights from Helena to Washington, D.C. from $350

This is the cheapest round-trip 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 2/14. 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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Cheap round-trip flights

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Alaska Airlines Logo
4:36 pm - 9:59 pm
HLN
-
DCA
27h 23m
1 stop
Alaska Airlines Logo
8:00 am - 3:59 pm
DCA
-
HLN
9h 59m
1 stop
$350Alaska Airlines
Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
4:36 pm - 9:59 pm
HLN
-
DCA
27h 23m
1 stop
Alaska Airlines Logo
8:00 am - 3:59 pm
DCA
-
HLN
9h 59m
1 stop
$390Alaska Airlines
Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
4:36 pm - 9:59 pm
HLN
-
DCA
27h 23m
1 stop
Alaska Airlines Logo
5:06 pm - 3:59 pm
DCA
-
HLN
24h 53m
2 stops
$444Alaska Airlines
Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
4:36 pm - 9:59 pm
HLN
-
DCA
27h 23m
1 stop
Alaska Airlines Logo
8:00 am - 3:59 pm
DCA
-
HLN
9h 59m
1 stop
$484Alaska Airlines
Thu, Feb 12 - Fri, Feb 20
United Airlines Logo
2:25 pm - 11:59 am
HLN
-
DCA
19h 34m
3 stops
United Airlines Logo
4:11 pm - 9:16 pm
DCA
-
HLN
7h 05m
1 stop
$509United Airlines
Sat, Feb 14 - Wed, Feb 18
United Airlines Logo
6:15 am - 2:59 pm
HLN
-
DCA
6h 44m
1 stop
United Airlines Logo
10:30 am - 9:16 pm
DCA
-
HLN
36h 46m
3 stops
$516United Airlines
Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
4:36 pm - 9:59 pm
HLN
-
DCA
27h 23m
1 stop
Alaska Airlines Logo
5:06 pm - 3:59 pm
DCA
-
HLN
24h 53m
2 stops
$534Alaska Airlines
Sat, Feb 14 - Wed, Feb 18
Alaska Airlines Logo
4:36 pm - 9:59 pm
HLN
-
DCA
27h 23m
1 stop
Alaska Airlines Logo
5:06 pm - 3:59 pm
DCA
-
HLN
24h 53m
2 stops
$546Alaska Airlines
Thu, Feb 12 - Fri, Feb 20
United Airlines Logo
2:25 pm - 11:59 am
HLN
-
DCA
19h 34m
3 stops
United Airlines Logo
10:30 am - 9:16 pm
DCA
-
HLN
36h 46m
3 stops
$575United Airlines
Sat, Feb 14 - Wed, Feb 18
United Airlines Logo
2:25 pm - 11:59 am
HLN
-
DCA
19h 34m
3 stops
United Airlines Logo
8:00 pm - 1:40 pm
DCA
-
HLN
19h 40m
2 stops
$577United Airlines
Sat, Feb 14 - Wed, Feb 18

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
Feb 14
HLN4:36 pmHelena
27h 23m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Feb 18
DCA8:00 amWashington, D.C. Reagan-National
9h 59m
1 stop
HLN3:59 pmHelena
$350
Alaska Airlines
Feb 14
HLN4:36 pmHelena
27h 23m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Feb 18
DCA8:00 amWashington, D.C. Reagan-National
9h 59m
1 stop
HLN3:59 pmHelena
$390
Alaska Airlines
Feb 14
HLN4:36 pmHelena
27h 23m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Feb 18
DCA5:06 pmWashington, D.C. Reagan-National
24h 53m
2 stops
HLN3:59 pmHelena
$444

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
Feb 14
HLN2:25 pmHelena
19h 34m
3 stops
DCA11:59 amWashington, D.C. Reagan-National
Feb 18
DCA4:11 pmWashington, D.C. Reagan-National
7h 05m
1 stop
HLN9:16 pmHelena
$509
United Airlines
Feb 14
HLN6:15 amHelena
6h 44m
1 stop
DCA2:59 pmWashington, D.C. Reagan-National
Feb 18
DCA10:30 amWashington, D.C. Reagan-National
36h 46m
3 stops
HLN9:16 pmHelena
$516
United Airlines
Feb 14
HLN2:25 pmHelena
19h 34m
3 stops
DCA11:59 amWashington, D.C. Reagan-National
Feb 18
DCA10:30 amWashington, D.C. Reagan-National
36h 46m
3 stops
HLN9:16 pmHelena
$575

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 January 21, 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

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

4:36 pm-9:59 pm

1 stop27h 23m

Washington, D.C. Reagan-National

Wed 2/18

8:00 am-3:59 pm

1 stop9h 59m

$350

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

4:36 pm-9:59 pm

1 stop27h 23m

Washington, D.C. Reagan-National

Wed 2/18

8:00 am-3:59 pm

1 stop9h 59m

$390

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

4:36 pm-9:59 pm

1 stop27h 23m

Washington, D.C. Reagan-National

Wed 2/18

5:06 pm-3:59 pm

2 stops24h 53m

$444

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Thu 2/12

4:36 pm-9:59 pm

1 stop27h 23m

Washington, D.C. Reagan-National

Fri 2/20

8:00 am-3:59 pm

1 stop9h 59m

$484

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

2:25 pm-11:59 am

3 stops19h 34m

Washington, D.C. Reagan-National

Wed 2/18

4:11 pm-9:16 pm

1 stop7h 05m

$509

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

6:15 am-2:59 pm

1 stop6h 44m

Washington, D.C. Reagan-National

Wed 2/18

10:30 am-9:16 pm

3 stops36h 46m

$516

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

4:36 pm-9:59 pm

1 stop27h 23m

Washington, D.C. Reagan-National

Wed 2/18

5:06 pm-3:59 pm

2 stops24h 53m

$534

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Thu 2/12

4:36 pm-9:59 pm

1 stop27h 23m

Washington, D.C. Reagan-National

Fri 2/20

5:06 pm-3:59 pm

2 stops24h 53m

$546

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

2:25 pm-11:59 am

3 stops19h 34m

Washington, D.C. Reagan-National

Wed 2/18

10:30 am-9:16 pm

3 stops36h 46m

$575

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Sat 2/14

2:25 pm-11:59 am

3 stops19h 34m

Washington, D.C. Reagan-National

Wed 2/18

8:00 pm-1:40 pm

2 stops19h 40m

$577

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 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 42% 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

6h 44m

Direct flights

None
The fastest flight from Helena to Washington, D.C. Reagan-National Airport takes 6h 44m
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

  • 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 6h 44m.

  • 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 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.

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
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Rockville
Gaithersburg
Manassas
Springfield
Fairfax
Linthicum Heights
Bethesda
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.

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