HLN - IAD

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

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$359
Typical prices: $502-$758
Delta
Tue 10/9Fri 10/12
HLN - IAD • 1 stop
Cheapest one-way
$417
Typical prices: $481-$568
Alaska Airlines
Fri 10/12
HLN - IAD • 1 stop
When to travel
June
Cheapest • 25% price drop
January
Most popular
Good to know
+1
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Washington, D.C. Dulles Intl Airport!
Flight Deals
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 9 - Mon, Oct 12
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
$359Delta
Sat, Nov 7 - Wed, Nov 11
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
$364Delta
Sat, Nov 7 - Wed, Nov 11
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
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
$369Delta
Fri, Oct 9 - Mon, Oct 12
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
$429Delta
Sat, Nov 7 - Wed, Nov 11
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
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
$439Delta
Sat, Jan 9 - Tue, Jan 12
United Airlines Logo
2:30 pm - 11:13 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
6h 43m1 stop Denver Intl
United Airlines Logo
4:08 pm - 8:59 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
6h 51m1 stop Denver Intl
$459United Airlines
Sat, Jan 9 - Tue, Jan 12
United Airlines Logo
2:30 pm - 11:13 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
6h 43m1 stop Denver Intl
United Airlines Logo
2:25 pm - 8:59 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
8h 34m1 stop Denver Intl
$459United Airlines
Sat, Nov 7 - Wed, Nov 11
Alaska Airlines Logo
4:41 pm - 5:44 amHLN  Helena-IAD Washington, D.C. Dulles Intl
11h 03m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:46 am - 4:04 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
10h 18m1 stop Seattle/Tacoma Intl
$484Alaska Airlines
Wed, Sep 16 - Sun, Sep 20
United Airlines Logo
2:26 pm - 11:19 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
6h 53m1 stop Denver Intl
United Airlines Logo
6:30 am - 1:45 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
9h 15m1 stop Denver Intl
$494United Airlines
Sat, Jan 9 - Tue, Jan 12
United Airlines Logo
2:30 pm - 11:13 pmHLN  Helena-IAD Washington, D.C. Dulles Intl
6h 43m1 stop Denver Intl
United Airlines Logo
2:25 pm - 8:59 pmIAD  Washington, D.C. Dulles Intl-HLN Helena
8h 34m1 stop Denver Intl
$504United 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

$359
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?

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

    • Economy Class
    • First Class

  • 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 $2,383. That means the highest observed fare was about 7x 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 higher than usual. Average one-way flight prices are about $615, which is 27% above 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)