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Cheap flights from Helena to Washington, D.C. from $255

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 6/29. 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.
Alaska Airlines Logo
4:48 pm - 5:40 am
HLN
-
IAD
10h 52m
1 stop
Alaska Airlines Logo
7:00 am - 4:11 pm
IAD
-
HLN
11h 11m
1 stop
$349Alaska Airlines
Tue, Oct 27 - Sat, Oct 31
Delta Logo
12:57 pm - 12:32 am
HLN
-
IAD
9h 35m
2 stops
Delta Logo
7:00 am - 12:17 pm
IAD
-
HLN
7h 17m
1 stop
$379Delta
Tue, Sep 29 - Fri, Oct 2
Delta Logo
12:57 pm - 12:32 am
HLN
-
IAD
9h 35m
2 stops
Delta Logo
6:10 am - 12:17 pm
IAD
-
HLN
8h 07m
2 stops
$409Delta
Tue, Sep 29 - Fri, Oct 2
Alaska Airlines Logo
5:18 pm - 5:40 am
HLN
-
IAD
10h 22m
1 stop
Alaska Airlines Logo
7:00 am - 4:41 pm
IAD
-
HLN
11h 41m
1 stop
$430Alaska Airlines
Wed, Sep 23 - Sat, Sep 26
Alaska Airlines Logo
5:18 pm - 6:08 pm
HLN
-
BWI
22h 50m
1 stop
Alaska Airlines Logo
7:50 am - 4:41 pm
BWI
-
HLN
10h 51m
1 stop
$491Alaska Airlines
Tue, Sep 15 - Sat, Sep 19
United Airlines Logo
2:20 pm - 12:45 am
HLN
-
IAD
8h 25m
1 stop
United Airlines Logo
2:35 pm - 9:20 pm
IAD
-
HLN
8h 45m
1 stop
$497United Airlines
Thu, Jul 16 - Wed, Jul 22
United Airlines Logo
6:15 am - 7:35 am
HLN
-
IAD
23h 20m
2 stops
United Airlines Logo
2:19 pm - 9:39 pm
IAD
-
HLN
9h 20m
1 stop
$528United Airlines
Tue, Oct 27 - Sat, Oct 31
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
$529United Airlines
Tue, Nov 3 - Wed, Nov 4
United Airlines Logo
6:15 am - 9:20 pm
HLN
-
IAD
13h 05m
2 stops
United Airlines Logo
4:15 pm - 9:39 pm
IAD
-
HLN
7h 24m
1 stop
$532United Airlines
Tue, Oct 27 - Sat, Oct 31
Delta Logo
5:40 am - 4:35 pm
HLN
-
DCA
8h 55m
1 stop
Delta Logo
5:45 pm - 10:39 pm
DCA
-
HLN
6h 54m
1 stop
$622Delta
Mon, Jul 20 - Mon, Jul 27

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United Airlines flights from Helena to Washington, D.C.

Our best United Airlines deals on Helena to Washington, D.C. flight tickets
United Airlines
Jul 16
HLN2:20 pmHelena
8h 25m
1 stop
IAD12:45 amWashington, D.C. Dulles Intl
Jul 22
IAD2:35 pmWashington, D.C. Dulles Intl
8h 45m
1 stop
HLN9:20 pmHelena
$497
United Airlines
Oct 27
HLN6:15 amHelena
23h 20m
2 stops
IAD7:35 amWashington, D.C. Dulles Intl
Oct 31
IAD2:19 pmWashington, D.C. Dulles Intl
9h 20m
1 stop
HLN9:39 pmHelena
$528
United Airlines
Oct 27
HLN6:15 amHelena
13h 05m
2 stops
IAD9:20 pmWashington, D.C. Dulles Intl
Oct 31
IAD4:15 pmWashington, D.C. Dulles Intl
7h 24m
1 stop
HLN9:39 pmHelena
$532

Delta flights from Helena to Washington, D.C.

Our best Delta deals on Helena to Washington, D.C. flight tickets
Delta
Jul 20
HLN5:40 amHelena
8h 55m
1 stop
DCA4:35 pmWashington, D.C. Reagan-National
Jul 27
DCA5:45 pmWashington, D.C. Reagan-National
6h 54m
1 stop
HLN10:39 pmHelena
$622
Delta
Aug 7
HLN12:55 pmHelena
19h 03m
2 stops
BWI9:58 amBaltimore/Washington
Aug 9
BWI9:59 amBaltimore/Washington
14h 31m
2 stops
HLN10:30 pmHelena
$804
Delta
Aug 7
HLN12:55 pmHelena
15h 25m
1 stop
BWI6:20 amBaltimore/Washington
Aug 9
BWI7:39 amBaltimore/Washington
16h 51m
1 stop
HLN10:30 pmHelena
$807

momondo Fare Finder

 
Customize your flight search to find flights from Helena to Washington, D.C. 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 22, 2026.
Use the filters below to find and compare flights from Helena to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 10/27

4:48 pm-5:40 am

1 stop10h 52m

Washington, D.C. Dulles Intl

Sat 10/31

7:00 am-4:11 pm

1 stop11h 11m

$349

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 9/29

12:57 pm-12:32 am

2 stops9h 35m

Washington, D.C. Dulles Intl

Fri 10/2

7:00 am-12:17 pm

1 stop7h 17m

$379

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 9/29

12:57 pm-12:32 am

2 stops9h 35m

Washington, D.C. Dulles Intl

Fri 10/2

6:10 am-12:17 pm

2 stops8h 07m

$409

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 9/23

5:18 pm-5:40 am

1 stop10h 22m

Washington, D.C. Dulles Intl

Sat 9/26

7:00 am-4:41 pm

1 stop11h 41m

$430

HelenaBaltimore

HLN - BWI

HLNBWI

Helena

Tue 9/15

5:18 pm-6:08 pm

1 stop22h 50m

Baltimore/Washington

Sat 9/19

7:50 am-4:41 pm

1 stop10h 51m

$491

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 7/16

2:20 pm-12:45 am

1 stop8h 25m

Washington, D.C. Dulles Intl

Wed 7/22

2:35 pm-9:20 pm

1 stop8h 45m

$497

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 10/27

6:15 am-7:35 am

2 stops23h 20m

Washington, D.C. Dulles Intl

Sat 10/31

2:19 pm-9:39 pm

1 stop9h 20m

$528
Quickest round-trip

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Tue 11/3

7:00 am-2:56 pm

1 stop5h 56m

Washington, D.C. Reagan-National

Wed 11/4

4:07 pm-8:59 pm

1 stop6h 52m

$529

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Tue 10/27

6:15 am-9:20 pm

2 stops13h 05m

Washington, D.C. Dulles Intl

Sat 10/31

4:15 pm-9:39 pm

1 stop7h 24m

$532

HelenaWashington, D.C.

HLN - DCA

HLNDCA

Helena

Mon 7/20

5:40 am-4:35 pm

1 stop8h 55m

Washington, D.C. Reagan-National

Mon 7/27

5:45 pm-10:39 pm

1 stop6h 54m

$622

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.

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

Can stopping save me money on Helena to Washington, D.C. flights?

You could potentially save up to 13% on your flight if you consider stops on a Helena to Washington, D.C. flight.

When to book flights from Helena to Washington, D.C.

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

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

Fastest flight time

6h 41m

Direct flights

None
The fastest flight from Helena to Washington, D.C. takes 6h 41m
There are no direct flights from Helena to Washington, D.C.. There are no popular flight routes from Helena to Washington, D.C..
Search flight deals

Frequently asked questions about flying from Helena to Washington, D.C.

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

    There are 1835.3 mi between Helena and Washington, D.C.. In terms of flight time, this usually takes a little over 6h 41m.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Helena Airport to Washington, D.C..

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

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Helena to Washington, D.C.

Compare and see reviews for airlines that fly from Helena to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $348Free CancellationRating
7.4
9,875 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
Gettysburg
Arlington
Waldorf
Woodbridge
Laurel
Fredericksburg
Gaithersburg
Colonial Beach
Rockville
Linthicum Heights
Silver Spring
Towson
Manassas
Tysons
Springfield
Bethesda
Fairfax
College Park

Why use momondo?

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

Finding the right flight to Washington, D.C. from Helena is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Washington, D.C. from Helena which offer a flexible booking policy as well as other useful filters and features.

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 not ready to book a flight from Helena to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport