HLN - IAD

$359 Find Cheap Flights from Helena to Washington, D.C. - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$359
Typical prices: $502-$758
Delta
Sun 1/21Wed 1/24
HLN - IAD • 1 stop
Cheapest one-way
$320
Typical prices: $481-$568
United Airlines
Thu 9/6
HLN - IAD • 1 stop
When to travel
June
Cheapest • 25% price drop
January
Most popular
Good to know
+1
Good to know
+1
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We hope you love your trip to Washington, D.C. Dulles Intl Airport!
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Booking Insights
Flight Deals

Cheap Flights from Helena to Dulles Intl (HLN-IAD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helena to Dulles Intl

Thu, Jan 21 - Sun, Jan 24
Delta Logo
12:50 pm - 11:46 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
8h 56m1 stop Salt Lake City
Delta Logo
7:15 am - 12:24 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
7h 09m1 stop Salt Lake City
$359Delta
Thu, Jan 21 - Sun, Jan 24
Delta Logo
12:50 pm - 11:46 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
8h 56m1 stop Salt Lake City
Delta Logo
10:05 am - 10:41 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
14h 36m2 stops Atlanta Hartsfield-Jackson Salt Lake City
$364Delta
Thu, Jan 21 - Sun, Jan 24
Delta Logo
12:50 pm - 12:20 amHLN  Helena-IAD Washington, D.C. Dulles Intl
9h 30m2 stops Salt Lake City Atlanta Hartsfield-Jackson
Delta Logo
10:05 am - 10:41 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
14h 36m2 stops Atlanta Hartsfield-Jackson Salt Lake City
$439Delta
Sat, Oct 31 - Tue, Nov 3
United Airlines Logo
2:23 pm - 11:15 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
6h 52m1 stop Denver Intl
United Airlines Logo
4:10 pm - 9:31 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
7h 21m1 stop Denver Intl
$459United Airlines
Wed, Sep 9 - Tue, Sep 15
Alaska Airlines Logo
5:18 pm - 5:40 amHLN  Helena-IAD Washington, D.C. Dulles Intl
10h 22m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:57 pm - 4:41 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
24h 44m1 stop Seattle/Tacoma Intl
$484Alaska Airlines
Tue, Sep 1 - Tue, Sep 8
Alaska Airlines Logo
5:11 pm - 5:40 amHLN  Helena-IAD Washington, D.C. Dulles Intl
10h 29m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:57 pm - 4:41 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
24h 44m1 stop Seattle/Tacoma Intl
$484Alaska Airlines
Sat, Oct 31 - Tue, Nov 3
United Airlines Logo
6:28 am - 3:44 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
7h 16m1 stop Denver Intl
United Airlines Logo
10:14 pm - 9:31 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
25h 17m2 stops Cincinnati Cinci./N. Kentucky Denver Intl
$534United Airlines
Wed, Oct 28 - Sat, Oct 31
Alaska Airlines Logo
5:26 pm - 4:30 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
21h 04m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:02 am - 4:44 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
11h 42m1 stop Seattle/Tacoma Intl
$561Alaska Airlines
Tue, Oct 20 - Sat, Oct 24
Alaska Airlines Logo
5:26 pm - 11:59 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
28h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
9:38 am - 4:49 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
9h 11m1 stop Seattle/Tacoma Intl
$561Alaska Airlines
Tue, Oct 20 - Sat, Oct 24
Alaska Airlines Logo
5:26 pm - 11:59 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
28h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:02 am - 4:49 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
11h 47m1 stop Seattle/Tacoma Intl
$561Alaska Airlines
Booking Insights

Price, demand and travel trends for Helena to Washington, D.C. Dulles Intl Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Helena to Washington, D.C. Dulles Intl Airport with more confidence.

How much is a round-trip flight from Helena to Washington, D.C. Dulles Intl Airport?

Round-trip flights from Helena to Washington, D.C. Dulles Intl Airport start at $359. Prices are below average for this route right now, with typical round-trip fares ranging from $502 to $758. The lowest price found in the past 5 days was $359 on Delta.

What's the cheapest day of the week to fly from Helena to Washington, D.C. Dulles Intl Airport?

Friday is the cheapest day of the week to fly from Helena to Washington, D.C. Dulles Intl Airport, it is 26% cheaper than the average day. Sunday is the most expensive day with flight prices 51% higher than average. Based on deals found by KAYAK users in the last 12 months.

Find deals

Key details for Helena to Washington, D.C. Dulles Intl Airport flights

Low season

September

Cheapest flight

$320
Flight from Helena to Washington, D.C. Dulles Intl Airport

When to book flights from Helena to Dulles Intl

Are your dates flexible? Find out the best times to travel from Helena to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Helena to Washington, D.C. Dulles Intl Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Helena to Washington, D.C. Dulles Intl Airport?

    Flights from Helena to Washington, D.C. Dulles Intl Airport usually depart from Helena (HLN) and arrive at Washington, D.C. Dulles Intl (IAD).

  • What cabin classes can I book on flights from Helena to Washington, D.C. Dulles Intl Airport?

    Only Economy Class is available on flights from Helena to Washington, D.C. Dulles Intl Airport.

  • Which airports do connecting flights from Helena to Washington, D.C. Dulles Intl Airport pass through?

    Most connecting flights from Helena to Washington, D.C. Dulles Intl Airport pass through Denver Intl (DEN), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

  • Can I save money by using flexible dates for flights from Helena to Washington, D.C. Dulles Intl Airport?

    Yes. Being flexible with your travel dates can save you up to 51% on the Helena to Washington, D.C. Dulles Intl Airport route. Friday is the cheapest departure day at $483 round-trip on average, while Sunday is the most expensive at $974, a difference of $491. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

  • Do I need a passport to fly from Helena to Washington, D.C. Dulles Intl Airport?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from Helena to Washington, D.C. Dulles Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $359 to $2,237. That means the highest observed fare was about 6x higher than the lowest one.

  • How are flight prices from Helena to Washington, D.C. Dulles Intl Airport looking right now?

    One-way fares from Helena to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $348, which is 28% below the typical average for this route.

  • What is the time difference between Helena and Washington, D.C. Dulles Intl Airport?

    Washington, D.C. Dulles Intl Airport is 2 hours ahead of Helena (Eastern Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:
    · Dollar
    · Budget
    · Hertz
    · Sixt
    · Thrifty

  • How much should I expect to pay for a Helena to Washington, D.C. Dulles Intl Airport flight?

    Round-trip flights from Helena to Washington, D.C. Dulles Intl Airport range from $502 to $758, with an average of $645 over the past 12 months. Anything below $502 counts as a good deal.

Your guide to booking Helena to Washington, D.C. Dulles Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Friday departure instead of Sunday. On this route, Friday flights average $483 - about $491 less than Sunday (50% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Helena to Washington, D.C. Dulles Intl Airport trip for June. Fares historically average $485 round-trip in that month - typically $489 less than the most expensive month, which is May (based on the last 12 months).

Everything you need to know for your flight from Helena to Dulles Intl

Information on your arrival and departure airports

Helena (HLN)
Dulles Intl (IAD)