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Cheap flights from Washington, D.C. Reagan-National Airport to Helena from $398

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to Helena departing on 7/20. 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

Find the cheapest flights from Washington, D.C. Reagan-National Airport to Helena

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
12:32 pm - 10:24 pm
DCA
-
HLN
11h 52m
2 stops
Delta Logo
7:15 am - 6:47 pm
HLN
-
DCA
9h 32m
2 stops
$409Delta
Wed, Sep 9 - Wed, Sep 23
Delta Logo
10:16 am - 10:39 pm
DCA
-
HLN
14h 23m
2 stops
Delta Logo
6:50 am - 4:44 pm
HLN
-
DCA
7h 54m
1 stop
$429Delta
Wed, Jul 29 - Sat, Aug 8
Delta Logo
5:45 pm - 10:39 pm
DCA
-
HLN
6h 54m
1 stop
Delta Logo
6:50 am - 4:44 pm
HLN
-
DCA
7h 54m
1 stop
$459Delta
Wed, Jul 29 - Sat, Aug 8
Delta Logo
5:45 pm - 10:39 pm
DCA
-
HLN
6h 54m
1 stop
Delta Logo
5:40 am - 4:35 pm
HLN
-
DCA
8h 55m
1 stop
$484Delta
Mon, Jul 27 - Thu, Jul 30
Alaska Airlines Logo
8:00 am - 4:11 pm
DCA
-
HLN
10h 11m
1 stop
Alaska Airlines Logo
4:48 pm - 10:59 pm
HLN
-
DCA
28h 11m
1 stop
$526Alaska Airlines
Tue, Oct 27 - Sat, Oct 31
Delta Logo
12:32 pm - 10:24 pm
DCA
-
HLN
11h 52m
2 stops
Delta Logo
7:15 am - 6:47 pm
HLN
-
DCA
9h 32m
2 stops
$529Delta
Wed, Sep 9 - Wed, Sep 23
Alaska Airlines Logo
8:00 am - 4:41 pm
DCA
-
HLN
10h 41m
1 stop
Alaska Airlines Logo
5:18 pm - 9:59 pm
HLN
-
DCA
26h 41m
1 stop
$537Alaska Airlines
Wed, Sep 16 - Wed, Sep 30
Alaska Airlines Logo
8:00 am - 4:41 pm
DCA
-
HLN
10h 41m
1 stop
Alaska Airlines Logo
5:18 pm - 9:00 pm
HLN
-
DCA
25h 42m
2 stops
$538Alaska Airlines
Wed, Sep 9 - Wed, Sep 23
Alaska Airlines Logo
5:00 pm - 4:41 pm
DCA
-
HLN
25h 41m
1 stop
Alaska Airlines Logo
5:18 pm - 9:00 pm
HLN
-
DCA
25h 42m
2 stops
$542Alaska Airlines
Mon, Sep 14 - Wed, Sep 30
Alaska Airlines Logo
8:00 am - 4:04 pm
DCA
-
HLN
10h 04m
1 stop
Alaska Airlines Logo
4:41 pm - 9:59 pm
HLN
-
DCA
27h 18m
1 stop
$543Alaska Airlines
Sat, Nov 14 - Tue, Nov 17

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

Our best Delta deals on Washington, D.C. Reagan-National Airport to Helena flight tickets
Delta
Sep 9
DCA12:32 pmWashington, D.C. Reagan-National
11h 52m
2 stops
HLN10:24 pmHelena
Sep 23
HLN7:15 amHelena
9h 32m
2 stops
DCA6:47 pmWashington, D.C. Reagan-National
$409
Delta
Jul 29
DCA10:16 amWashington, D.C. Reagan-National
14h 23m
2 stops
HLN10:39 pmHelena
Aug 8
HLN6:50 amHelena
7h 54m
1 stop
DCA4:44 pmWashington, D.C. Reagan-National
$429
Delta
Jul 29
DCA5:45 pmWashington, D.C. Reagan-National
6h 54m
1 stop
HLN10:39 pmHelena
Aug 8
HLN6:50 amHelena
7h 54m
1 stop
DCA4:44 pmWashington, D.C. Reagan-National
$459

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

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Helena flight tickets
United Airlines
Nov 14
DCA4:07 pmWashington, D.C. Reagan-National
7h 32m
1 stop
HLN9:39 pmHelena
Nov 17
HLN2:34 pmHelena
19h 11m
3 stops
DCA11:45 amWashington, D.C. Reagan-National
$593
United Airlines
Nov 14
DCA4:07 pmWashington, D.C. Reagan-National
7h 32m
1 stop
HLN9:39 pmHelena
Nov 17
HLN2:34 pmHelena
19h 11m
3 stops
DCA11:45 amWashington, D.C. Reagan-National
$603
United Airlines
Oct 27
DCA9:30 amWashington, D.C. Reagan-National
14h 09m
2 stops
HLN9:39 pmHelena
Oct 31
HLN6:15 amHelena
6h 41m
1 stop
DCA2:56 pmWashington, D.C. Reagan-National
$621

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Wed 9/9

12:32 pm-10:24 pm

2 stops11h 52m

Helena

Wed 9/23

7:15 am-6:47 pm

2 stops9h 32m

$409

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Wed 7/29

10:16 am-10:39 pm

2 stops14h 23m

Helena

Sat 8/8

6:50 am-4:44 pm

1 stop7h 54m

$429
Quickest round-trip

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Wed 7/29

5:45 pm-10:39 pm

1 stop6h 54m

Helena

Sat 8/8

6:50 am-4:44 pm

1 stop7h 54m

$459

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Mon 7/27

5:45 pm-10:39 pm

1 stop6h 54m

Helena

Thu 7/30

5:40 am-4:35 pm

1 stop8h 55m

$484

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Tue 10/27

8:00 am-4:11 pm

1 stop10h 11m

Helena

Sat 10/31

4:48 pm-10:59 pm

1 stop28h 11m

$526

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Wed 9/9

12:32 pm-10:24 pm

2 stops11h 52m

Helena

Wed 9/23

7:15 am-6:47 pm

2 stops9h 32m

$529

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Wed 9/16

8:00 am-4:41 pm

1 stop10h 41m

Helena

Wed 9/30

5:18 pm-9:59 pm

1 stop26h 41m

$537

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Wed 9/9

8:00 am-4:41 pm

1 stop10h 41m

Helena

Wed 9/23

5:18 pm-9:00 pm

2 stops25h 42m

$538

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Mon 9/14

5:00 pm-4:41 pm

1 stop25h 41m

Helena

Wed 9/30

5:18 pm-9:00 pm

2 stops25h 42m

$542

Washington, D.C.Helena

DCA - HLN

DCAHLN

Washington, D.C. Reagan-National

Sat 11/14

8:00 am-4:04 pm

1 stop10h 04m

Helena

Tue 11/17

4:41 pm-9:59 pm

1 stop27h 18m

$543

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 Helena from

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

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

Delta is the most popular carrier operating from Washington, D.C. Reagan-National to Helena

What airlines fly to Helena?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Helena from Washington, D.C. Reagan-National Airport according to our data. American Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 3 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

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

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

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

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

Fastest flight time

7h 07m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Helena takes 7h 07m
There are no direct flights from Washington, D.C. Reagan-National Airport to Helena. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Helena.
Search flight deals

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

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

    The straight-line distance from Washington, D.C. Reagan-National to Helena is 1837.0 mi. A reasonable flight in good conditions will take 7h 07m.

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Helena Airport.

  • What documentation or ID do you need to fly to Helena Airport?

    The travel and health documents you'll need for your trip to Helena Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Helena Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

It is quick and easy to find Washington, D.C. to Helena flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Helena that suits you.

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

Yes. momondo enables you to select and highlight flights to Helena from Washington, D.C. with this policy.

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

momondo provides multiple filters to help you find the best flight to Helena from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Washington, D.C. to Helena flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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