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HLN - SEA

$207 Find Cheap Flights from Helena to Seattle - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$207
Typical prices: $177-$393
Alaska Airlines
Wed 11/7Sat 11/10
HLN - SEA • Non-stop
Cheapest non-stop
$207
Typical prices: $177-$390
Alaska Airlines
Sat 1/6Fri 1/12
HLN - SEA • Non-stop
Nonstop flights
Every day
You can fly direct with Alaska Airlines. Average duration is 1h 53m
Direct flights
+1
Direct flights
+1
When to travel
February
Cheapest • 38% price drop
April
Most popular
Good to know
+1
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Helena to Seattle (HLN-SEA)

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

Recent round-trip flight deals from Helena to Seattle

Sat, Nov 7 - Tue, Nov 10
Alaska Airlines Logo
4:41 pm - 5:33 pmHLN  Helena-SEA Seattle/Tacoma Intl
1h 52mnonstop
Alaska Airlines Logo
1:28 pm - 4:04 pmSEA  Seattle/Tacoma Intl-HLN Helena
1h 36mnonstop
$207Alaska Airlines
Wed, Jan 6 - Tue, Jan 12
Alaska Airlines Logo
5:00 pm - 5:50 pmHLN  Helena-SEA Seattle/Tacoma Intl
1h 50mnonstop
Alaska Airlines Logo
1:48 pm - 4:23 pmSEA  Seattle/Tacoma Intl-HLN Helena
1h 35mnonstop
$207Alaska Airlines
Tue, Mar 2 - Tue, Mar 9
Alaska Airlines Logo
4:08 pm - 4:55 pmHLN  Helena-SEA Seattle/Tacoma Intl
1h 47mnonstop
Alaska Airlines Logo
12:59 pm - 3:31 pmSEA  Seattle/Tacoma Intl-HLN Helena
1h 32mnonstop
$207Alaska Airlines
Thu, Dec 10 - Sat, Dec 12
Delta Logo
1:10 pm - 4:59 pmHLN  Helena-SEA Seattle/Tacoma Intl
4h 49m1 stop Salt Lake City
Delta Logo
5:30 am - 12:30 pmSEA  Seattle/Tacoma Intl-HLN Helena
6h 00m1 stop Salt Lake City
$262Delta
Fri, Dec 11 - Sat, Dec 12
Delta Logo
1:10 pm - 6:52 pmHLN  Helena-SEA Seattle/Tacoma Intl
6h 42m1 stop Salt Lake City
Delta Logo
5:30 am - 12:30 pmSEA  Seattle/Tacoma Intl-HLN Helena
6h 00m1 stop Salt Lake City
$262Delta
Sat, Nov 7 - Tue, Nov 10
United Airlines Logo
2:23 pm - 9:19 pmHLN  Helena-SEA Seattle/Tacoma Intl
7h 56m1 stop Denver Intl
United Airlines Logo
5:05 am - 1:40 pmSEA  Seattle/Tacoma Intl-HLN Helena
7h 35m1 stop Denver Intl
$317United Airlines
Wed, Jan 6 - Tue, Jan 12
Delta Logo
12:50 pm - 4:53 pmHLN  Helena-SEA Seattle/Tacoma Intl
5h 03m1 stop Salt Lake City
Delta Logo
5:45 am - 12:24 pmSEA  Seattle/Tacoma Intl-HLN Helena
5h 39m1 stop Salt Lake City
$333Delta
Wed, Jan 6 - Tue, Jan 12
Delta Logo
5:45 am - 12:24 pmHLN  Helena-SEA Seattle/Tacoma Intl
7h 39m1 stop Salt Lake City
Delta Logo
5:45 am - 12:24 pmSEA  Seattle/Tacoma Intl-HLN Helena
5h 39m1 stop Salt Lake City
$333Delta
Wed, Jan 6 - Tue, Jan 12
United Airlines Logo
2:27 pm - 9:17 pmHLN  Helena-SEA Seattle/Tacoma Intl
7h 50m1 stop Denver Intl
United Airlines Logo
5:00 am - 1:40 pmSEA  Seattle/Tacoma Intl-HLN Helena
7h 40m1 stop Denver Intl
$353United Airlines
Tue, Nov 3 - Tue, Nov 10
United Airlines Logo
2:23 pm - 9:19 pmHLN  Helena-SEA Seattle/Tacoma Intl
7h 56m1 stop Denver Intl
United Airlines Logo
5:05 am - 1:40 pmSEA  Seattle/Tacoma Intl-HLN Helena
7h 35m1 stop Denver Intl
$353United Airlines
Booking Insights

Price, demand and travel trends for Helena to Seattle flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Helena to Seattle?

Round-trip flights from Helena to Seattle typically range from $177 to $393. The lowest price found in the past 5 days was $207, on Alaska Airlines.

What's the cheapest day of the week to fly from Helena to Seattle?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Helena to Seattle. It’s 21% cheaper than the average day, while Sunday is the most expensive, with prices 119% higher.

What’s the cheapest month to fly from Helena to Seattle?

•February is the cheapest month to fly from Helena to Seattle at $147 round-trip.
•November ($528) and June ($438) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 259% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for Helena to Seattle flights

Low season

September

Cheapest flight

$207
Beat the crowds with an average 11% drop in travelers.
The most popular month to fly with an average 42% increase in travelers.
Round-trip flight from Helena to Seattle

When to book flights from Helena to Seattle

Are your dates flexible? Find out the best times to travel from Helena to Seattle 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 Seattle flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Helena to Seattle?

    These are the earliest and latest flight times available from Helena to Seattle:

    • Earliest: departs at 4:18 pm and lands at 6:11 pm
    • Latest: departs at 5:26 pm and lands at 7:19 pm.

    The flight takes about 1h 53m.

  • What cabin classes can I book on flights from Helena to Seattle?

    Only Economy Class is available on flights from Helena to Seattle.

  • How long is a flight from Helena to Seattle?

    A nonstop flight from Helena to Seattle takes 1h 53m, covering 489 miles.

  • Do I need a passport to fly from Helena to Seattle?

    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 Seattle flight?

    Round-trip flights from Helena to Seattle range from $177 to $393, with an average of $236 over the past 12 months. Anything below $177 counts as a good deal.

  • How much can I save by taking a layover when flying from Helena to Seattle?

    On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $237 round-trip, compared to $453 via a layover through Salt Lake City (SLC).

  • Which aircraft model is used most often on flights from Helena to Seattle?

    The Embraer 175 family is used most often on this route, operated mainly by Alaska Airlines and Hawaiian Airlines. Other aircraft seen on the route include Embraer 175 (Enhanced Winglets) variants.

  • How are flight departures from Helena to Seattle spread across the day?

    Afternoon is the busiest departure period on Helena to Seattle flights, with 100% of flights leaving in that window. Morning departures account for 0%, evening flights for 0%, and night flights for 0%.

  • Have flight prices from Helena to Seattle 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 $207 to $1,789. That means the highest observed fare was about 9x higher than the lowest one.

  • Which airlines offer Wi-Fi on Helena to Seattle flights?

    Alaska Airlines is the only airline on the Helena to Seattle route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from Helena to Seattle looking right now?

    One-way fares from Helena to Seattle are currently higher than usual. Average one-way flight prices are about $296, which is 16% above the typical average for this route.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Dollar

  • Which airports can I use when flying from Helena to Seattle?

    Flights from Helena to Seattle usually depart from Helena (HLN) and arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Helena to Seattle pass through?

    Most connecting flights from Helena to Seattle pass through Salt Lake City (SLC), which handles 100% of one-stop traffic on this route.

  • Can I save money by using flexible dates for flights from Helena to Seattle?

    Yes. Flexible dates can save you up to 64% on flights from Helena to Seattle. Wednesday is the cheapest departure day at $187 round-trip on average, while Sunday is the most expensive at $517, a difference of $330.

    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 airlines fly from Helena to Seattle?

    Only Alaska Airlines operates flights between Helena and Seattle.

  • What is the time difference between Helena and Seattle?

    Seattle is 1 hour behind Helena (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Helena to Seattle flights?

    Among airlines operating Helena to Seattle flights:

    • Alaska Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Helena to Seattle flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Alaska Airlines: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Your guide to booking Helena to Seattle flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average $187, about $330 less than Sunday fares (64% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Helena to Seattle trip for February. Fares historically average $147 round-trip in that month - typically $381 less than the most expensive month, which is November (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Seattle Airport Marriott
    • Coast Gateway Hotel
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

Prefer to fly direct from Helena to Seattle?

 
Find which airlines fly direct from Helena Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Helena to Seattle/Tacoma Intl

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Direct returns

Seattle/Tacoma Intl to Helena

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

More options for your flight from Helena to Seattle

Complete your trip to Seattle with a hotel stay or car rental

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