What is the cheapest airline that flies from Helena to Washington, D.C. Reagan-National?

Alaska Airlines is the most popular carrier 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 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?

As of November 2026, there is 1 operator available to choose from 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.

$318 Cheap Flights from Helena to Washington, D.C. Reagan-National Airport in 2026/27

Discover deals from 900+ travel sites with momondo.

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

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 7:19 pmHLN Helena-DCA Washington, D.C. Reagan-National

10h 19m2 stops Salt Lake City Detroit Metropolitan Wayne County

10:00 am - 10:41 pmDCA Washington, D.C. Reagan-National-HLN Helena

14h 41m2 stops Atlanta Hartsfield-Jackson Salt Lake City

$419Delta

Tue, Mar 23 - Tue, Mar 30

7:00 am - 7:19 pmHLN Helena-DCA Washington, D.C. Reagan-National

10h 19m2 stops Salt Lake City Detroit Metropolitan Wayne County

10:00 am - 10:41 pmDCA Washington, D.C. Reagan-National-HLN Helena

14h 41m2 stops Atlanta Hartsfield-Jackson Salt Lake City

$419Delta

Tue, Mar 23 - Mon, Mar 29

7:00 am - 3:03 pmHLN Helena-DCA Washington, D.C. Reagan-National

6h 03m1 stop Denver Intl

4:07 pm - 8:59 pmDCA Washington, D.C. Reagan-National-HLN Helena

6h 52m1 stop Denver Intl

$479United Airlines

Wed, Mar 24 - Tue, Mar 30

7:00 am - 3:03 pmHLN Helena-DCA Washington, D.C. Reagan-National

6h 03m1 stop Denver Intl

11:30 am - 8:59 pmDCA Washington, D.C. Reagan-National-HLN Helena

11h 29m2 stops Chicago O'Hare Intl Denver Intl

$485United Airlines

Wed, Mar 24 - Tue, Mar 30

4:49 pm - 9:59 pmHLN Helena-DCA Washington, D.C. Reagan-National

27h 10m1 stop Seattle/Tacoma Intl

5:05 pm - 4:12 pmDCA Washington, D.C. Reagan-National-HLN Helena

25h 07m1 stop Seattle/Tacoma Intl

$493Alaska Airlines

Sat, Dec 5 - Tue, Dec 8

4:49 pm - 9:59 pmHLN Helena-DCA Washington, D.C. Reagan-National

27h 10m1 stop Seattle/Tacoma Intl

5:05 pm - 4:12 pmDCA Washington, D.C. Reagan-National-HLN Helena

25h 07m1 stop Seattle/Tacoma Intl

$513Alaska Airlines

Sat, Dec 5 - Tue, Dec 8

6:20 am - 2:56 pmHLN Helena-DCA Washington, D.C. Reagan-National

6h 36m1 stop Denver Intl

4:13 pm - 9:26 pmDCA Washington, D.C. Reagan-National-HLN Helena

7h 13m1 stop Denver Intl

$529United Airlines

Sat, Dec 5 - Tue, Dec 8

7:00 am - 7:19 pmHLN Helena-DCA Washington, D.C. Reagan-National

10h 19m2 stops Salt Lake City Detroit Metropolitan Wayne County

8:15 pm - 12:24 pmDCA Washington, D.C. Reagan-National-HLN Helena

18h 09m2 stops Detroit Metropolitan Wayne County Salt Lake City

$558Delta

Tue, Mar 23 - Wed, Mar 31

4:49 pm - 4:05 pmHLN Helena-DCA Washington, D.C. Reagan-National

21h 16m1 stop Seattle/Tacoma Intl

8:00 am - 4:12 pmDCA Washington, D.C. Reagan-National-HLN Helena

10h 12m1 stop Seattle/Tacoma Intl

$561Alaska Airlines

Wed, Dec 2 - Mon, Dec 7

7:00 am - 7:19 pmHLN Helena-DCA Washington, D.C. Reagan-National

10h 19m2 stops Salt Lake City Detroit Metropolitan Wayne County

5:59 pm - 12:24 pmDCA Washington, D.C. Reagan-National-HLN Helena

20h 25m1 stop Salt Lake City

$563Delta

Tue, Mar 23 - Sun, Mar 28

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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

Mar 24

HLN7:00 amHelena

6h 03m

1 stop

DCA3:03 pmWashington, D.C. Reagan-National

Mar 30

DCA4:07 pmWashington, D.C. Reagan-National

6h 52m

1 stop

HLN8:59 pmHelena

$479

United Airlines

Mar 24

HLN7:00 amHelena

6h 03m

1 stop

DCA3:03 pmWashington, D.C. Reagan-National

Mar 30

DCA11:30 amWashington, D.C. Reagan-National

11h 29m

2 stops

HLN8:59 pmHelena

$485

United Airlines

Dec 5

HLN6:20 amHelena

6h 36m

1 stop

DCA2:56 pmWashington, D.C. Reagan-National

Dec 8

DCA4:13 pmWashington, D.C. Reagan-National

7h 13m

1 stop

HLN9:26 pmHelena

$529

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

Dec 5

HLN4:49 pmHelena

27h 10m

1 stop

DCA9:59 pmWashington, D.C. Reagan-National

Dec 8

DCA5:05 pmWashington, D.C. Reagan-National

25h 07m

1 stop

HLN4:12 pmHelena

$493

Alaska Airlines

Dec 5

HLN4:49 pmHelena

27h 10m

1 stop

DCA9:59 pmWashington, D.C. Reagan-National

Dec 8

DCA5:05 pmWashington, D.C. Reagan-National

25h 07m

1 stop

HLN4:12 pmHelena

$513

Alaska Airlines

Dec 2

HLN4:49 pmHelena

21h 16m

1 stop

DCA4:05 pmWashington, D.C. Reagan-National

Dec 7

DCA8:00 amWashington, D.C. Reagan-National

10h 12m

1 stop

HLN4:12 pmHelena

$561

momondo Fare Finder

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

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Tue 3/23

7:00 am-7:19 pm

2 stops10h 19m

Washington, D.C. Reagan-National

Tue 3/30

10:00 am-10:41 pm

2 stops14h 41m

$419

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Tue 3/23

7:00 am-7:19 pm

2 stops10h 19m

Washington, D.C. Reagan-National

Mon 3/29

10:00 am-10:41 pm

2 stops14h 41m

$419

Quickest round-trip

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Wed 3/24

7:00 am-3:03 pm

1 stop6h 03m

Washington, D.C. Reagan-National

Tue 3/30

4:07 pm-8:59 pm

1 stop6h 52m

$479

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Wed 3/24

7:00 am-3:03 pm

1 stop6h 03m

Washington, D.C. Reagan-National

Tue 3/30

11:30 am-8:59 pm

2 stops11h 29m

$485

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Sat 12/5

4:49 pm-9:59 pm

1 stop27h 10m

Washington, D.C. Reagan-National

Tue 12/8

5:05 pm-4:12 pm

1 stop25h 07m

$493

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Sat 12/5

4:49 pm-9:59 pm

1 stop27h 10m

Washington, D.C. Reagan-National

Tue 12/8

5:05 pm-4:12 pm

1 stop25h 07m

$513

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Sat 12/5

6:20 am-2:56 pm

1 stop6h 36m

Washington, D.C. Reagan-National

Tue 12/8

4:13 pm-9:26 pm

1 stop7h 13m

$529

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Tue 3/23

7:00 am-7:19 pm

2 stops10h 19m

Washington, D.C. Reagan-National

Wed 3/31

8:15 pm-12:24 pm

2 stops18h 09m

$558

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Wed 12/2

4:49 pm-4:05 pm

1 stop21h 16m

Washington, D.C. Reagan-National

Mon 12/7

8:00 am-4:12 pm

1 stop10h 12m

$561

HelenaWashington, D.C.

HLN Helena - DCA Washington, D.C. Reagan-National

HLNDCA

Helena

Tue 3/23

7:00 am-7:19 pm

2 stops10h 19m

Washington, D.C. Reagan-National

Sun 3/28

5:59 pm-12:24 pm

1 stop20h 25m

$563

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Can stopping save me money on Helena to Washington, D.C. Reagan-National Airport flights?

You could potentially save up to 19% on your flight if you consider stops on a Helena to Washington, D.C. Reagan-National Airport flight.

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

Best Price Found	$318
Fastest flight time	6h 03m
Direct flights	None

The best one-way flight to Washington, D.C. Reagan-National Airport from Helena in the past 72 hours is $318. The best round-trip flight deal from Helena to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $419.

The fastest flight from Helena to Washington, D.C. Reagan-National Airport takes 6h 03m

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 6h 03m.
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?
As of November 2026, there is 1 operator available to choose from 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?
Based on momondo bookings for flights between Helena and Washington, D.C. Reagan-National Airport, the leading airline is United Airlines, making up 100% of the total bookings.

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 Airlines	PriceFrom $449	Free Cancellation	Rating 7.3 10,469 reviews		Search United Airlines flights

Alexandria

National Harbor

Arlington

Gettysburg

Fredericksburg

Waldorf

Laurel

Gaithersburg

Linthicum Heights

Woodbridge

Rockville

Silver Spring

Towson

Fairfax

Springfield

Glen Burnie

Edgewood

Colonial Beach

Falls Church

College Park

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

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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.

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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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Cheap flights from Helena to Washington, D.C. from $318

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 11/25. 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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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

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

momondo Fare Finder

Use the filters below to find and compare flights from Helena to Washington, D.C. Reagan-National Airport that are best for you.

See travel insights to Washington, D.C. from

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

Can stopping save me money on Helena to Washington, D.C. Reagan-National Airport flights?

What is the cheapest airline that flies from Helena to Washington, D.C. Reagan-National?

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

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

Cheap Helena to Washington, D.C. Reagan-National Airport (HLN to DCA) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

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

Why use momondo?

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Helena flight routes

According to popular flight searches on momondo this year

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