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Cheap flights from Helena to Washington, D.C. from $373

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 1/4. 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

Alaska Airlines Logo
6:28 pm - 9:59 pmHLN-DCA
25h 31m1 stop
Alaska Airlines Logo
5:00 pm - 5:51 pmDCA-HLN
26h 51m1 stop
$432Alaska Airlines
Find Deal
Wed, Dec 10 - Sat, Dec 13
Alaska Airlines Logo
6:28 pm - 9:59 pmHLN-DCA
25h 31m1 stop
Alaska Airlines Logo
8:00 am - 5:51 pmDCA-HLN
11h 51m1 stop
$447Alaska Airlines
Find Deal
Wed, Dec 10 - Sat, Dec 13
Delta Logo
5:30 am - 6:03 pmHLN-DCA
10h 33m2 stops
Delta Logo
3:06 pm - 10:30 pmDCA-HLN
9h 24m2 stops
$476Delta
Find Deal
Wed, Dec 10 - Sat, Dec 13
Alaska Airlines Logo
6:18 pm - 9:59 pmHLN-DCA
25h 41m1 stop
Alaska Airlines Logo
8:00 am - 5:41 pmDCA-HLN
11h 41m1 stop
$477Alaska Airlines
Find Deal
Fri, Oct 17 - Wed, Oct 22
Delta Logo
5:30 am - 6:03 pmHLN-DCA
10h 33m2 stops
Delta Logo
3:06 pm - 12:26 pmDCA-HLN
23h 20m2 stops
$494Delta
Find Deal
Wed, Dec 10 - Sat, Dec 13
Delta Logo
5:30 am - 4:00 pmHLN-DCA
8h 30m1 stop
Delta Logo
3:06 pm - 10:30 pmDCA-HLN
9h 24m2 stops
$513Delta
Find Deal
Wed, Dec 10 - Sat, Dec 13
Alaska Airlines Logo
6:18 pm - 9:14 pmHLN-DCA
24h 56m2 stops
Alaska Airlines Logo
8:00 am - 5:41 pmDCA-HLN
11h 41m1 stop
$545Alaska Airlines
Find Deal
Mon, Oct 20 - Wed, Oct 22
United Airlines Logo
6:30 am - 10:42 pmHLN-DCA
14h 12m2 stops
United Airlines Logo
4:05 pm - 1:47 pmDCA-HLN
23h 42m1 stop
$570United Airlines
Find Deal
Wed, Dec 10 - Sat, Dec 13
United Airlines Logo
5:18 pm - 2:01 pmHLN-DCA
18h 43m2 stops
United Airlines Logo
4:47 pm - 2:09 pmDCA-HLN
23h 22m2 stops
$576United Airlines
Find Deal
Fri, Oct 17 - Wed, Oct 22
United Airlines Logo
6:30 am - 11:50 pmHLN-DCA
15h 20m2 stops
United Airlines Logo
7:59 pm - 2:09 pmDCA-HLN
20h 10m2 stops
$665United Airlines
Find Deal
Fri, Oct 10 - Mon, Oct 13

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 10
HLN6:30 amHelena
14h 12m
2 stops
DCA10:42 pmWashington, D.C. Reagan-National
Dec 13
DCA4:05 pmWashington, D.C. Reagan-National
23h 42m
1 stop
HLN1:47 pmHelena
$570
Find similar
United Airlines
Oct 17
HLN5:18 pmHelena
18h 43m
2 stops
DCA2:01 pmWashington, D.C. Reagan-National
Oct 22
DCA4:47 pmWashington, D.C. Reagan-National
23h 22m
2 stops
HLN2:09 pmHelena
$576
Find similar
United Airlines
Oct 10
HLN6:30 amHelena
15h 20m
2 stops
DCA11:50 pmWashington, D.C. Reagan-National
Oct 13
DCA7:59 pmWashington, D.C. Reagan-National
20h 10m
2 stops
HLN2:09 pmHelena
$665
Find similar

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

Our best Delta deals on Helena to Washington, D.C. Reagan-National Airport flight tickets
Delta
Dec 10
HLN5:30 amHelena
10h 33m
2 stops
DCA6:03 pmWashington, D.C. Reagan-National
Dec 13
DCA3:06 pmWashington, D.C. Reagan-National
9h 24m
2 stops
HLN10:30 pmHelena
$476
Find similar
Delta
Dec 10
HLN5:30 amHelena
10h 33m
2 stops
DCA6:03 pmWashington, D.C. Reagan-National
Dec 13
DCA3:06 pmWashington, D.C. Reagan-National
23h 20m
2 stops
HLN12:26 pmHelena
$494
Find similar
Delta
Dec 10
HLN5:30 amHelena
8h 30m
1 stop
DCA4:00 pmWashington, D.C. Reagan-National
Dec 13
DCA3:06 pmWashington, D.C. Reagan-National
9h 24m
2 stops
HLN10:30 pmHelena
$513
Find similar

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 September 17, 2025.
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

Wed 12/10

6:28 pm-9:59 pm

1 stop25h 31m

Washington, D.C. Reagan-National

Sat 12/13

5:00 pm-5:51 pm

1 stop26h 51m

$432

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Wed 12/10

6:28 pm-9:59 pm

1 stop25h 31m

Washington, D.C. Reagan-National

Sat 12/13

8:00 am-5:51 pm

1 stop11h 51m

$447

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Wed 12/10

5:30 am-6:03 pm

2 stops10h 33m

Washington, D.C. Reagan-National

Sat 12/13

3:06 pm-10:30 pm

2 stops9h 24m

$476

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Fri 10/17

6:18 pm-9:59 pm

1 stop25h 41m

Washington, D.C. Reagan-National

Wed 10/22

8:00 am-5:41 pm

1 stop11h 41m

$477

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Wed 12/10

5:30 am-6:03 pm

2 stops10h 33m

Washington, D.C. Reagan-National

Sat 12/13

3:06 pm-12:26 pm

2 stops23h 20m

$494

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Wed 12/10

5:30 am-4:00 pm

1 stop8h 30m

Washington, D.C. Reagan-National

Sat 12/13

3:06 pm-10:30 pm

2 stops9h 24m

$513

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Mon 10/20

6:18 pm-9:14 pm

2 stops24h 56m

Washington, D.C. Reagan-National

Wed 10/22

8:00 am-5:41 pm

1 stop11h 41m

$545

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Wed 12/10

6:30 am-10:42 pm

2 stops14h 12m

Washington, D.C. Reagan-National

Sat 12/13

4:05 pm-1:47 pm

1 stop23h 42m

$570

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Fri 10/17

5:18 pm-2:01 pm

2 stops18h 43m

Washington, D.C. Reagan-National

Wed 10/22

4:47 pm-2:09 pm

2 stops23h 22m

$576

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Fri 10/10

6:30 am-11:50 pm

2 stops15h 20m

Washington, D.C. Reagan-National

Mon 10/13

7:59 pm-2:09 pm

2 stops20h 10m

$665

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. 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 day to depart on your flight to Washington, D.C. Reagan-National Airport?

The cheapest day to depart from Helena to Washington, D.C. Reagan-National Airport is on a Tuesday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Tuesday will often find tickets for as low as $692. Flights from Helena to Washington, D.C. Reagan-National Airport on a Monday will generally be more expensive and average around $1,080. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Direct flights

None
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.
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  • 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 15m.

  • 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
Gettysburg
National Harbor
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Fairfax
Glen Burnie
Gaithersburg
Springfield
Linthicum Heights

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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