HLN - IAD

$190 Find Cheap Flights from Helena to Washington, D.C. - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$379
Typical prices: $502-$758
Delta
Sat 10/20Tue 10/30
HLN - IAD • 1 stop
Cheapest one-way
$190
Typical prices: $481-$568
Alaska Airlines
Mon 10/29
HLN - IAD • 1 stop
When to travel
June
Cheapest • 25% price drop
January
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Denver Intl (DEN)
Cheapest • Avg $658 (round-trip)
Salt Lake City (SLC)
Shortest trip • 7h 44m (one-way)
Insights
Insights
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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

Fri, Oct 30 - Tue, Nov 10
Delta Logo
1:08 pm - 11:35 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
8h 27m1 stop Salt Lake City
Delta Logo
7:00 am - 12:27 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
7h 27m1 stop Salt Lake City
$379Delta
Tue, Oct 20 - Fri, Oct 30
Delta Logo
1:08 pm - 11:35 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
8h 27m1 stop Salt Lake City
Delta Logo
6:13 am - 12:28 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
8h 15m1 stop Salt Lake City
$379Delta
Fri, Oct 30 - Tue, Nov 10
Delta Logo
1:08 pm - 12:42 amHLN  Helena-IAD Washington, D.C. Dulles Intl
9h 34m2 stops Salt Lake City Atlanta Hartsfield-Jackson
Delta Logo
7:00 am - 12:27 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
7h 27m1 stop Salt Lake City
$384Delta
Tue, Oct 20 - Fri, Oct 30
Delta Logo
1:08 pm - 11:35 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
8h 27m1 stop Salt Lake City
Delta Logo
6:05 am - 12:28 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
8h 23m2 stops Detroit Metropolitan Wayne County Salt Lake City
$384Delta
Fri, Oct 30 - Tue, Nov 10
Delta Logo
7:15 am - 6:19 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
9h 04m2 stops Salt Lake City Minneapolis St Paul
Delta Logo
12:35 pm - 10:26 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
11h 51m2 stops New York John F Kennedy Intl Salt Lake City
$389Delta
Wed, Dec 2 - Fri, Dec 4
Delta Logo
1:10 pm - 11:47 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
8h 37m1 stop Salt Lake City
Delta Logo
7:00 am - 12:30 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
7h 30m1 stop Salt Lake City
$415Delta
Wed, Dec 2 - Fri, Dec 4
Delta Logo
1:10 pm - 11:36 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
8h 26m2 stops Salt Lake City Minneapolis St Paul
Delta Logo
7:00 am - 12:30 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
7h 30m1 stop Salt Lake City
$495Delta
Thu, Oct 29 - Sun, Nov 1
United Airlines Logo
6:28 am - 5:55 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
9h 27m1 stop Denver Intl
United Airlines Logo
6:10 am - 1:40 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
9h 30m1 stop Denver Intl
$499United Airlines
Thu, Nov 12 - Sun, Nov 15
Delta Logo
1:07 pm - 12:41 amHLN  Helena-IAD Washington, D.C. Dulles Intl
9h 34m2 stops Salt Lake City Atlanta Hartsfield-Jackson
Delta Logo
7:00 am - 12:27 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
7h 27m1 stop Salt Lake City
$514Delta
Mon, Oct 26 - Fri, Oct 30
Alaska Airlines Logo
5:26 pm - 5:40 amHLN  Helena-IAD Washington, D.C. Dulles Intl
10h 14m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:33 pm - 4:44 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
25h 11m1 stop Seattle/Tacoma Intl
$516Alaska 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 $379. 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 $379 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

$190
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.

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

    Two cabin classes are available on flights from Helena to Washington, D.C. Dulles Intl Airport:

    • Economy Class
    • First Class

  • How long is a flight from Helena to Washington, D.C. Dulles Intl Airport?

    There are currently no nonstop flights available from Helena to Washington, D.C. Dulles Intl Airport. Flights with 1 layover take between 7h 37m and 7h 44m in total, depending on the connection.

  • 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.

  • 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.

  • 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 $379 to $3,145. That means the highest observed fare was about 8x 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 $275, which is 43% below the typical average for this route.

  • 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

  • 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).

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

    Connecting flights from Helena to Washington, D.C. Dulles Intl Airport most commonly pass through:

    • Denver Intl (DEN) - 71% of one-stop connections
    • Salt Lake City (SLC) - 29% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • 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.

  • How much time can I save by choosing a different layover airport from Helena to Washington, D.C. Dulles Intl Airport?

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 7h 37m, compared with 7h 44m via Salt Lake City (SLC).

  • 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 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.

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).

More options for your flight from Helena to Dulles Intl

Complete your trip to Washington, D.C. with a hotel stay or car rental

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