What are the cheapest airlines flying from Helena to Washington, D.C. round-trip?

According to our current data, Delta ($256), and United Airlines ($344) offers the cheapest pricing from Helena to Washington, D.C.. Delta is currently priced 61% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Helena to Washington, D.C. one-way?

The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $262. However, be on the lookout for offers from Alaska Airlines and United Airlines, as they are both options that can get you from Helena to Washington, D.C. for a low price.

What is the cheapest day to fly from Helena to Washington, D.C.?

Travelers seeking maximum savings on their Helena to Washington, D.C. flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the most popular routes from Helena to Washington, D.C.?

Most travelers choose Helena - Washington, D.C. Dulles Intl, Helena - Baltimore/Washington or Helena - Washington, D.C. Reagan-National when deciding on the best route from Helena to Washington, D.C..

What is the cheapest day to fly round-trip from Helena to Washington, D.C.?

Saturday flights are generally found to be more expensive for flights from Helena to Washington, D.C.. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C..

What is the cheapest month to fly from Helena to Washington, D.C.?

Flights from Helena to Washington, D.C. lean towards being more expensive in November. Prices are generally better when you fly from Helena to Washington, D.C. in July, with the cheapest ticket starting at $273.

What airport do you fly from for flights from Helena to Washington, D.C.?

Most people fly from Helena (HLN) if they book a flight from Helena to Washington, D.C.. On average, Helena has 0 outbound flights to Washington, D.C. per day from 2 airlines. Helena is conveniently located just 2.7 mi from Helena’s city center.

Can I find deals for flights from Helena to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Helena to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Helena to Washington, D.C.?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to Washington, D.C..

Can I find deals for business class flights from Helena to Washington, D.C.?

Yes. Cheapflights offers flight deals from Helena to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$262+ Flights from Helena to Washington, D.C.

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Cheap flight deals from Helena to Washington, D.C.

Round-trip from	$436 (Hawaiian Airlines)
One-way from	$262 (Delta)
Popular in	November
Cheapest in	July
Average price	$674

From Helena to Washington, D.C. (WAS)

Search Deals

One-way flight from Helena to Washington, D.C. (WAS)

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Highest demand for flights based on searches. 27% potential increase in price ($254 potential increase over avg. RT price).

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Cheapest flight prices on average. 14% potential price decrease ($87 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from Helena to Washington, D.C.

Cheapest flights from Helena to Washington, D.C.
Explore the most affordable flight options available from Helena to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Wed 12/104:10 pmHLN - BWI

1 stop11h 35mHawaiian Airlines

Sat 12/137:30 amBWI - HLN

1 stop10h 13mHawaiian Airlines

Deal found 8/13

$436

Wed 12/104:10 pmHLN - IAD

1 stop11h 45mHawaiian Airlines

Sat 12/137:00 amIAD - HLN

1 stop10h 43mHawaiian Airlines

Deal found 8/13

$446

Wed 10/226:18 pmHLN - IAD

1 stop28h 05mAlaska Airlines

Wed 10/297:43 amIAD - HLN

1 stop11h 53mAlaska Airlines

Deal found 8/13

$462

Wed 10/225:45 amHLN - IAD

2 stops15h 33mDelta

Wed 10/296:15 amIAD - HLN

1 stop8h 05mDelta

Deal found 8/13

$479

Wed 10/226:18 pmHLN - IAD

1 stop28h 05mAlaska Airlines

Fri 10/317:43 amIAD - HLN

1 stop11h 53mAlaska Airlines

Deal found 8/13

$483

Wed 10/225:45 amHLN - BWI

1 stop22h 15mDelta

Wed 10/297:15 amBWI - HLN

1 stop7h 05mDelta

Deal found 8/13

$483

Wed 11/2612:50 pmHLN - IAD

1 stop8h 59mDelta

Fri 11/287:20 amIAD - HLN

1 stop7h 04mDelta

Deal found 8/12

$488

Thu 11/61:00 pmHLN - BWI

2 stops9h 41mDelta

Sun 11/97:15 amBWI - HLN

1 stop7h 09mDelta

Deal found 8/14

$496

Thu 11/61:00 pmHLN - IAD

1 stop8h 33mDelta

Sun 11/97:20 amIAD - HLN

1 stop7h 04mDelta

Deal found 8/14

$499

Wed 12/105:40 amHLN - BWI

2 stops9h 19mDelta

Sat 12/137:15 amBWI - HLN

1 stop7h 09mDelta

Deal found 8/13

$500

Wed 11/265:40 amHLN - BWI

2 stops9h 24mDelta

Fri 11/282:25 pmBWI - HLN

2 stops10h 12mDelta

Deal found 8/12

$505

Wed 10/222:44 pmHLN - BWI

1 stop6h 34mUnited Airlines

Wed 10/296:15 amBWI - HLN

2 stops9h 12mUnited Airlines

Deal found 8/13

$506

Best flights from Helena to Washington, D.C.
Discover carefully curated flight deals from Helena to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2025.

Wed 12/104:10 pmHLN - BWI

1 stop11h 35mHawaiian Airlines

Sat 12/137:30 amBWI - HLN

1 stop10h 13mHawaiian Airlines

Deal found 8/11

$436

Wed 10/226:18 pmHLN - IAD

1 stop28h 05mAlaska Airlines

Wed 10/297:43 amIAD - HLN

1 stop11h 53mAlaska Airlines

Deal found 8/13

$462

Wed 10/225:45 amHLN - IAD

2 stops15h 33mDelta

Wed 10/296:15 amIAD - HLN

1 stop8h 05mDelta

Deal found 8/13

$479

Wed 10/222:44 pmHLN - BWI

1 stop6h 34mUnited Airlines

Wed 10/296:15 amBWI - HLN

2 stops9h 12mUnited Airlines

Deal found 8/13

$506

Wed 12/104:10 pmHLN - IAD

1 stop11h 45mHawaiian Airlines

Sat 12/137:00 amIAD - HLN

1 stop10h 43mHawaiian Airlines

Deal found 8/12

$446

Wed 10/226:18 pmHLN - IAD

1 stop28h 05mAlaska Airlines

Fri 10/317:43 amIAD - HLN

1 stop11h 53mAlaska Airlines

Deal found 8/13

$483

Wed 10/225:45 amHLN - BWI

1 stop22h 15mDelta

Wed 10/297:15 amBWI - HLN

1 stop7h 05mDelta

Deal found 8/13

$483

Wed 10/226:18 pmHLN - IAD

1 stop28h 05mAlaska Airlines

Thu 10/306:13 pmIAD - HLN

1 stop25h 23mAlaska Airlines

Deal found 8/13

$483

Wed 11/2612:50 pmHLN - IAD

1 stop8h 59mDelta

Fri 11/287:20 amIAD - HLN

1 stop7h 04mDelta

Deal found 8/12

$488

Wed 12/106:30 amHLN - DCA

2 stops15h 29mUnited Airlines

Sat 12/134:05 pmDCA - HLN

1 stop23h 42mUnited Airlines

Deal found 8/13

$582

Thu 11/61:00 pmHLN - BWI

2 stops9h 41mDelta

Sun 11/97:15 amBWI - HLN

1 stop7h 09mDelta

Deal found 8/14

$496

Wed 12/104:10 pmHLN - DCA

1 stop22h 05mAlaska Airlines

Sat 12/135:30 pmDCA - HLN

1 stop24h 13mAlaska Airlines

Deal found 8/12

$512

Last-minute flights from Helena to Washington, D.C.
Discover last-minute flight deals from Helena to Washington, D.C.. Data last updated August 14, 2025 and is based on user searches.

Sun 8/172:34 pmHLN - BWI

1 stop6h 43mUnited Airlines

Tue 9/24:20 pmBWI - HLN

1 stop6h 51mUnited Airlines

Deal found 8/12

$939

Sun 8/245:20 pmHLN - BWI

1 stop10h 01mUnited Airlines

Tue 9/24:20 pmBWI - HLN

1 stop6h 51mUnited Airlines

Deal found 8/12

$672

Fri 8/295:20 pmHLN - BWI

1 stop10h 01mUnited Airlines

Sat 9/134:21 pmBWI - HLN

1 stop7h 53mUnited Airlines

Deal found 8/12

$617

Thu 9/184:02 pmHLN - IAD

1 stop30h 21mAlaska Airlines

Tue 9/236:09 pmIAD - HLN

1 stop23h 12mAlaska Airlines

Deal found 8/13

$533

Thu 9/182:30 pmHLN - BWI

1 stop6h 47mUnited Airlines

Tue 9/238:30 amBWI - HLN

1 stop9h 34mUnited Airlines

Deal found 8/13

$541

Thu 9/185:20 pmHLN - DCA

2 stops13h 01mUnited Airlines

Tue 9/234:24 pmDCA - HLN

1 stop6h 47mUnited Airlines

Deal found 8/13

$606

Thu 9/185:20 pmHLN - IAD

1 stop10h 02mUnited Airlines

Tue 9/238:20 amIAD - HLN

2 stops14h 51mUnited Airlines

Deal found 8/13

$637

Thu 9/181:00 pmHLN - IAD

2 stops15h 01mDelta

Tue 9/231:00 pmIAD - HLN

2 stops11h 14mDelta

Deal found 8/13

$807

Thu 9/181:00 pmHLN - BWI

2 stops9h 28mDelta

Tue 9/2310:18 amBWI - HLN

2 stops13h 56mDelta

Deal found 8/12

$1,004

One-way flights from Helena to Washington, D.C.
Search for one-way flight options from Helena to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated August 14, 2025.

Wed 9/31:00 pmHLN - BWI

2 stops9h 23mDelta

Deal found 8/13

$262

Wed 9/34:02 pmHLN - BWI

1 stop11h 37mAlaska Airlines

Deal found 8/13

$378

Sun 8/314:02 pmHLN - BWI

1 stop11h 31mAlaska Airlines

Deal found 8/12

$398

Sun 8/316:30 amHLN - BWI

2 stops13h 12mUnited Airlines

Deal found 8/12

$406

Wed 9/36:30 amHLN - BWI

3 stops29h 18mUnited Airlines

Deal found 8/13

$442

Sun 9/144:02 pmHLN - IAD

1 stop30h 21mAlaska Airlines

Deal found 8/13

$448

Sun 9/145:20 pmHLN - IAD

2 stops18h 29mUnited Airlines

Deal found 8/13

$489

Sun 8/242:30 pmHLN - BWI

1 stop12h 51mUnited Airlines

Deal found 8/12

$607

Cheapflights Fare Finder

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

HelenaBaltimore

HLN - BWI

HLNBWI

Helena

Wed 12/10

4:10 pm-5:45 am

1 stop11h 35m

Baltimore/Washington

Sat 12/13

7:30 am-3:43 pm

1 stop10h 13m

$436

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 12/10

4:10 pm-5:55 am

1 stop11h 45m

Washington, D.C. Dulles Intl

Sat 12/13

7:00 am-3:43 pm

1 stop10h 43m

$446

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 10/22

6:18 pm-12:23 am

1 stop28h 05m

Washington, D.C. Dulles Intl

Wed 10/29

7:43 am-5:36 pm

1 stop11h 53m

$462

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 10/22

5:45 am-11:18 pm

2 stops15h 33m

Washington, D.C. Dulles Intl

Wed 10/29

6:15 am-12:20 pm

1 stop8h 05m

$479

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 10/22

6:18 pm-12:23 am

1 stop28h 05m

Washington, D.C. Dulles Intl

Fri 10/31

7:43 am-5:36 pm

1 stop11h 53m

$483

HelenaBaltimore

HLN - BWI

HLNBWI

Helena

Wed 10/22

5:45 am-6:00 am

1 stop22h 15m

Baltimore/Washington

Wed 10/29

7:15 am-12:20 pm

1 stop7h 05m

$483

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 10/22

6:18 pm-12:23 am

1 stop28h 05m

Washington, D.C. Dulles Intl

Thu 10/30

6:13 pm-5:36 pm

1 stop25h 23m

$483

HelenaWashington, D.C.

HLN - IAD

HLNIAD

Helena

Wed 11/26

12:50 pm-11:49 pm

1 stop8h 59m

Washington, D.C. Dulles Intl

Fri 11/28

7:20 am-12:24 pm

1 stop7h 04m

$488

HelenaBaltimore

HLN - BWI

HLNBWI

Helena

Thu 11/6

1:00 pm-12:41 am

2 stops9h 41m

Baltimore/Washington

Sun 11/9

7:15 am-12:24 pm

1 stop7h 09m

$496

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

7:20 am-12:24 pm

1 stop7h 04m

$499

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 28 results

Best time to book a flight from Helena to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Helena with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Helena to Washington, D.C.

What is the cheapest month to book a flight from Helena to Washington, D.C.?

Currently, July is the cheapest month in which you can book a flight from Helena to Washington, D.C. (average of $302). Flying from Helena to Washington, D.C. in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from HLN to WAS?

A simple way to save on the total cost of your ticket is to fly from Helena to Washington, D.C. at noon. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with United Airlines from Helena to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,916 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,916 reviews

United Airlines

7.4

Good

8,916 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

What airport do you fly from for flights from Helena to Washington, D.C.?
Most people fly from Helena (HLN) if they book a flight from Helena to Washington, D.C.. On average, Helena has 0 outbound flights to Washington, D.C. per day from 2 airlines. Helena is conveniently located just 2.7 mi from Helena’s city center.
What are the cheapest airlines flying from Helena to Washington, D.C. round-trip?
According to our current data, Delta ($256), and United Airlines ($344) offers the cheapest pricing from Helena to Washington, D.C.. Delta is currently priced 61% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Helena to Washington, D.C. one-way?
The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $262. However, be on the lookout for offers from Alaska Airlines and United Airlines, as they are both options that can get you from Helena to Washington, D.C. for a low price.
What are the most popular routes from Helena to Washington, D.C.?
Most travelers choose Helena - Washington, D.C. Dulles Intl, Helena - Baltimore/Washington or Helena - Washington, D.C. Reagan-National when deciding on the best route from Helena to Washington, D.C..
Can I find deals for flights from Helena to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Helena to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Helena to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to Washington, D.C..
Can I find deals for business class flights from Helena to Washington, D.C.?
Yes. Cheapflights offers flight deals from Helena to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Helena to Washington, D.C.?
Currently, July is the cheapest month in which you can book a flight from Helena to Washington, D.C. (average of $302). Flying from Helena to Washington, D.C. in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Helena to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$256	Average$873	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$344	Average$434	FlexibilityNo cancel fee	On-time69%

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$262+ Cheap flights from Helena (HLN) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Helena to Washington, D.C. with Cheapflights

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Cheap flight deals from Helena to Washington, D.C.

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Average price

Find flight deals from Helena to Washington, D.C.

Cheapest flights from Helena to Washington, D.C.Explore the most affordable flight options available from Helena to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Explore the most affordable flight options available from Helena to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Helena to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Helena with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Helena to Washington, D.C.

What is the cheapest month to book a flight from Helena to Washington, D.C.?

What is the cheapest time of day to fly from HLN to WAS?

Find hourly flight availability from Helena to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with United Airlines from Helena to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Helena to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Helena to Washington, D.C.?

What are the cheapest airlines flying from Helena to Washington, D.C. round-trip?

What are the cheapest airlines to fly from Helena to Washington, D.C. one-way?

What are the most popular routes from Helena to Washington, D.C.?

Can I find deals for flights from Helena to Washington, D.C. that include hotel bookings?

How can I find direct flights from Helena to Washington, D.C.?

Can I find deals for business class flights from Helena to Washington, D.C.?

What is the cheapest month to book a flight from Helena to Washington, D.C.?

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

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Alternative routes for Helena to Washington, D.C.

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Top 2 airlines flying from Helena to Washington, D.C.

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Cheapest flights from Helena to Washington, D.C.
Explore the most affordable flight options available from Helena to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.