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

Hawaiian Airlines, United Airlines, and Alaska Airlines are the most popular carriers operating from Helena to Washington, D.C.

What airlines fly to Washington, D.C.?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Washington, D.C. from Helena according to our data. United Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 4 different airlines that fly to Washington, D.C. 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.?

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.?

The number of operators available for flights from Helena Airport to Washington, D.C. is 1 as of September 2025.

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.

$241 Cheap Flights from Helena to Washington, D.C. in 2025

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

Round-trip

One-way

Cheap round-trip flights

6:13 pm - 4:40 pmHLN-IAD

20h 27m1 stop

7:35 am - 5:51 pmIAD-HLN

12h 16m1 stop

$432Alaska Airlines

Find Deal

Wed, Nov 19 - Fri, Dec 5

6:28 pm - 9:59 pmHLN-DCA

25h 31m1 stop

5:00 pm - 5:51 pmDCA-HLN

26h 51m1 stop

$432Alaska Airlines

Find Deal

Wed, Dec 10 - Sat, Dec 13

2:44 pm - 11:22 pmHLN-IAD

6h 38m1 stop

3:59 pm - 9:22 pmIAD-HLN

7h 23m1 stop

$452United Airlines

Find Deal

Wed, Oct 22 - Mon, Oct 27

6:28 pm - 9:59 pmHLN-DCA

25h 31m1 stop

5:00 pm - 5:51 pmDCA-HLN

26h 51m1 stop

$453Alaska Airlines

Find Deal

Wed, Dec 10 - Sat, Dec 13

1:00 pm - 11:33 pmHLN-IAD

8h 33m1 stop

7:10 am - 12:26 pmIAD-HLN

7h 16m1 stop

$491Delta

Find Deal

Thu, Nov 6 - Sun, Nov 9

12:50 pm - 11:42 pmHLN-BWI

8h 52m1 stop

7:10 am - 12:27 pmBWI-HLN

7h 17m1 stop

$494Delta

Find Deal

Fri, Mar 6 - Tue, Mar 10

6:30 am - 7:08 pmHLN-IAD

10h 38m1 stop

10:10 pm - 1:47 pmIAD-HLN

17h 37m1 stop

$497United Airlines

Find Deal

Wed, Dec 10 - Sat, Dec 13

12:50 pm - 11:42 pmHLN-BWI

8h 52m1 stop

10:00 am - 10:38 pmBWI-HLN

14h 38m2 stops

$499Delta

Find Deal

Fri, Mar 6 - Tue, Mar 10

2:44 pm - 11:22 pmHLN-IAD

6h 38m1 stop

2:25 pm - 9:22 pmIAD-HLN

8h 57m1 stop

$508United Airlines

Find Deal

Wed, Oct 22 - Mon, Oct 27

2:22 pm - 9:21 pmHLN-IAD

28h 59m1 stop

10:10 pm - 1:47 pmIAD-HLN

17h 37m1 stop

$513United Airlines

Find Deal

Sun, Nov 23 - Wed, Dec 3

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

Our best United Airlines deals on Helena to Washington, D.C. flight tickets

United Airlines

Oct 22

HLN2:44 pmHelena

6h 38m

1 stop

IAD11:22 pmWashington, D.C. Dulles Intl

Oct 27

IAD3:59 pmWashington, D.C. Dulles Intl

7h 23m

1 stop

HLN9:22 pmHelena

$452

Find similar

United Airlines

Dec 10

HLN6:30 amHelena

10h 38m

1 stop

IAD7:08 pmWashington, D.C. Dulles Intl

Dec 13

IAD10:10 pmWashington, D.C. Dulles Intl

17h 37m

1 stop

HLN1:47 pmHelena

$497

Find similar

United Airlines

Oct 22

HLN2:44 pmHelena

6h 38m

1 stop

IAD11:22 pmWashington, D.C. Dulles Intl

Oct 27

IAD2:25 pmWashington, D.C. Dulles Intl

8h 57m

1 stop

HLN9:22 pmHelena

$508

Find similar

Delta flights from Helena to Washington, D.C.

Our best Delta deals on Helena to Washington, D.C. flight tickets

Delta

Nov 6

HLN1:00 pmHelena

8h 33m

1 stop

IAD11:33 pmWashington, D.C. Dulles Intl

Nov 9

IAD7:10 amWashington, D.C. Dulles Intl

7h 16m

1 stop

HLN12:26 pmHelena

$491

Find similar

Delta

Mar 6

HLN12:50 pmHelena

8h 52m

1 stop

BWI11:42 pmBaltimore/Washington

Mar 10

BWI7:10 amBaltimore/Washington

7h 17m

1 stop

HLN12:27 pmHelena

$494

Find similar

Delta

Mar 6

HLN12:50 pmHelena

8h 52m

1 stop

BWI11:42 pmBaltimore/Washington

Mar 10

BWI10:00 amBaltimore/Washington

14h 38m

2 stops

HLN10:38 pmHelena

$499

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 11/19

6:13 pm-4:40 pm

1 stop20h 27m

Washington, D.C. Dulles Intl

Fri 12/5

7:35 am-5:51 pm

1 stop12h 16m

$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

5:00 pm-5:51 pm

1 stop26h 51m

$432

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 10/22

2:44 pm-11:22 pm

1 stop6h 38m

Washington, D.C. Dulles Intl

Mon 10/27

3:59 pm-9:22 pm

1 stop7h 23m

$452

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

$453

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Thu 11/6

1:00 pm-11:33 pm

1 stop8h 33m

Washington, D.C. Dulles Intl

Sun 11/9

7:10 am-12:26 pm

1 stop7h 16m

$491

HelenaBaltimore

HLN - BWI

HLNBWI

Helena

Fri 3/6

12:50 pm-11:42 pm

1 stop8h 52m

Baltimore/Washington

Tue 3/10

7:10 am-12:27 pm

1 stop7h 17m

$494

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 12/10

6:30 am-7:08 pm

1 stop10h 38m

Washington, D.C. Dulles Intl

Sat 12/13

10:10 pm-1:47 pm

1 stop17h 37m

$497

HelenaBaltimore

HLN - BWI

HLNBWI

Helena

Fri 3/6

12:50 pm-11:42 pm

1 stop8h 52m

Baltimore/Washington

Tue 3/10

10:00 am-10:38 pm

2 stops14h 38m

$499

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 10/22

2:44 pm-11:22 pm

1 stop6h 38m

Washington, D.C. Dulles Intl

Mon 10/27

2:25 pm-9:22 pm

1 stop8h 57m

$508

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Sun 11/23

2:22 pm-9:21 pm

1 stop28h 59m

Washington, D.C. Dulles Intl

Wed 12/3

10:10 pm-1:47 pm

1 stop17h 37m

$513

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.

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

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Helena is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $498. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Helena to Washington, D.C. for around $825.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

At noon is the cheapest time of day to fly from Helena to Washington, D.C. when you can find flight prices for as low as $514. Flying to Washington, D.C. at noon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $689. Of course, these prices can vary depending on the time of year and what airport you fly to.

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.

Direct flights	None

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

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 15m.
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.?
The number of operators available for flights from Helena Airport to Washington, D.C. is 1 as of September 2025.
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.
What is the most popular airline from Helena to Washington, D.C.?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Helena to Washington, D.C. is United Airlines (100% of total bookings).

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 Airlines	PriceFrom $344	Free Cancellation	Rating 7.4 8,937 reviews		Search United Airlines flights

Alexandria

Gettysburg

National Harbor

Arlington

Woodbridge

Waldorf

Tysons

Laurel

Colonial Beach

Silver Spring

Fredericksburg

Towson

Rockville

Manassas

Reston

Fairfax

Gaithersburg

Glen Burnie

Springfield

Linthicum Heights

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.