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Cheap flights from Helena to Seattle from $129

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to Seattle departing on 10/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Helena to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
SEA
1h 56mnonstop
Alaska Airlines Logo
2:05 pm - 4:41 pm
SEA
-
HLN
1h 36mnonstop
$197Alaska Airlines
Sat, Sep 26 - Wed, Sep 30
Alaska Airlines Logo
4:08 pm - 4:55 pm
HLN
-
SEA
1h 47mnonstop
Alaska Airlines Logo
12:59 pm - 3:31 pm
SEA
-
HLN
1h 32mnonstop
$197Alaska Airlines
Wed, Dec 9 - Sat, Dec 12
Alaska Airlines Logo
4:08 pm - 4:55 pm
HLN
-
SEA
1h 47mnonstop
Alaska Airlines Logo
12:59 pm - 3:31 pm
SEA
-
HLN
1h 32mnonstop
$197Alaska Airlines
Sat, Dec 5 - Sat, Dec 12
Alaska Airlines Logo
4:08 pm - 4:55 pm
HLN
-
SEA
1h 47mnonstop
Alaska Airlines Logo
12:59 pm - 3:31 pm
SEA
-
HLN
1h 32mnonstop
$197Alaska Airlines
Tue, Dec 1 - Sat, Dec 5
Delta Logo
1:04 pm - 6:43 pm
HLN
-
SEA
6h 39m
1 stop
Delta Logo
5:35 am - 12:22 pm
SEA
-
HLN
5h 47m
1 stop
$207Delta
Wed, Dec 9 - Sat, Dec 12
Delta Logo
12:57 pm - 6:55 pm
HLN
-
SEA
6h 58m
1 stop
Delta Logo
5:45 am - 12:17 pm
SEA
-
HLN
5h 32m
1 stop
$207Delta
Sat, Sep 26 - Wed, Sep 30
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
SEA
1h 56mnonstop
Alaska Airlines Logo
2:05 pm - 4:41 pm
SEA
-
HLN
1h 36mnonstop
$207Alaska Airlines
Sat, Sep 26 - Mon, Sep 28
Alaska Airlines Logo
5:11 pm - 6:08 pm
HLN
-
SEA
1h 57mnonstop
Alaska Airlines Logo
1:58 pm - 4:34 pm
SEA
-
HLN
1h 36mnonstop
$207Alaska Airlines
Sat, Aug 29 - Sun, Aug 30
Alaska Airlines Logo
5:11 pm - 6:08 pm
HLN
-
SEA
1h 57mnonstop
Alaska Airlines Logo
2:05 pm - 4:41 pm
SEA
-
HLN
1h 36mnonstop
$217Alaska Airlines
Sun, Sep 6 - Thu, Sep 17
Alaska Airlines Logo
4:41 pm - 5:33 pm
HLN
-
SEA
1h 52mnonstop
Alaska Airlines Logo
1:28 pm - 4:04 pm
SEA
-
HLN
1h 36mnonstop
$217Alaska Airlines
Thu, Nov 5 - Sun, Nov 8

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Alaska Airlines flights from Helena to Seattle

Our best Alaska Airlines deals on Helena to Seattle flight tickets
Alaska Airlines
Sep 26
HLN5:18 pmHelena
1h 56m
SEA6:14 pmSeattle/Tacoma Intl
Sep 30
SEA2:05 pmSeattle/Tacoma Intl
1h 36m
HLN4:41 pmHelena
$197
Alaska Airlines
Sep 6
HLN5:11 pmHelena
1h 57m
SEA6:08 pmSeattle/Tacoma Intl
Sep 17
SEA2:05 pmSeattle/Tacoma Intl
1h 36m
HLN4:41 pmHelena
$217
Alaska Airlines
Oct 10
HLN5:26 pmHelena
1h 52m
SEA6:18 pmSeattle/Tacoma Intl
Oct 17
SEA2:14 pmSeattle/Tacoma Intl
1h 35m
HLN4:49 pmHelena
$257

Delta flights from Helena to Seattle

Our best Delta deals on Helena to Seattle flight tickets
Delta
Sep 26
HLN12:57 pmHelena
6h 58m
1 stop
SEA6:55 pmSeattle/Tacoma Intl
Sep 30
SEA5:45 amSeattle/Tacoma Intl
5h 32m
1 stop
HLN12:17 pmHelena
$207
Delta
Oct 10
HLN1:08 pmHelena
6h 54m
1 stop
SEA7:02 pmSeattle/Tacoma Intl
Oct 13
SEA5:25 amSeattle/Tacoma Intl
6h 03m
1 stop
HLN12:28 pmHelena
$227
Delta
Sep 19
HLN7:15 amHelena
6h 40m
1 stop
SEA12:55 pmSeattle/Tacoma Intl
Sep 28
SEA5:45 amSeattle/Tacoma Intl
5h 32m
1 stop
HLN12:17 pmHelena
$237

momondo Fare Finder

 
Customize your flight search to find flights from Helena to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 31, 2026.
Use the filters below to find and compare flights from Helena to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/26

5:18 pm-6:14 pm

Nonstop1h 56m

Seattle/Tacoma Intl

Wed 9/30

2:05 pm-4:41 pm

Nonstop1h 36m

$197
Quickest round-trip

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 12/9

4:08 pm-4:55 pm

Nonstop1h 47m

Seattle/Tacoma Intl

Sat 12/12

12:59 pm-3:31 pm

Nonstop1h 32m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 12/5

4:08 pm-4:55 pm

Nonstop1h 47m

Seattle/Tacoma Intl

Sat 12/12

12:59 pm-3:31 pm

Nonstop1h 32m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 12/1

4:08 pm-4:55 pm

Nonstop1h 47m

Seattle/Tacoma Intl

Sat 12/5

12:59 pm-3:31 pm

Nonstop1h 32m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 12/9

1:04 pm-6:43 pm

1 stop6h 39m

Seattle/Tacoma Intl

Sat 12/12

5:35 am-12:22 pm

1 stop5h 47m

$207

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/26

12:57 pm-6:55 pm

1 stop6h 58m

Seattle/Tacoma Intl

Wed 9/30

5:45 am-12:17 pm

1 stop5h 32m

$207

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/26

5:18 pm-6:14 pm

Nonstop1h 56m

Seattle/Tacoma Intl

Mon 9/28

2:05 pm-4:41 pm

Nonstop1h 36m

$207

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 8/29

5:11 pm-6:08 pm

Nonstop1h 57m

Seattle/Tacoma Intl

Sun 8/30

1:58 pm-4:34 pm

Nonstop1h 36m

$207

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sun 9/6

5:11 pm-6:08 pm

Nonstop1h 57m

Seattle/Tacoma Intl

Thu 9/17

2:05 pm-4:41 pm

Nonstop1h 36m

$217

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 11/5

4:41 pm-5:33 pm

Nonstop1h 52m

Seattle/Tacoma Intl

Sun 11/8

1:28 pm-4:04 pm

Nonstop1h 36m

$217

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Helena to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Helena and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from $252 to $338.
The lowest price recently found on this route was $197.

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Helena to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $147. If you don’t want to visit Seattle in February, then you should wait until November to fly from Helena, when ticket prices are also cheap, with an average price of $157.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Helena is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $227. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Helena because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $596.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Helena in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $343 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $572. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Helena to Seattle/Tacoma Intl flight route?

Fly from Helena to Seattle/Tacoma Intl for the best Helena - Seattle/Tacoma Intl flight prices

What cabin class options are available on Helena to Seattle flights?

There are 4 cabin classes available to choose from on Helena to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Helena to Seattle flights?

No. A direct flight is the cheapest option for a flight between Helena to Seattle.

How have Helena to Seattle flight prices changed over time?

When to book flights from Helena to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Helena to Seattle (HLN to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to Seattle

Best Price Found

$300

Fastest flight time

1h 47m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Helena in the past 72 hours is $300. The best round-trip flight deal from Helena to Seattle found on momondo in the last 72 hours is $252.
The fastest flight from Helena to Seattle takes 1h 47m
Direct flights go from Helena to Seattle every day.
There is 1 airport in Seattle. From Helena there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Helena to Seattle

  • How far is Helena to Seattle/Tacoma Intl by plane?

    A flight from Helena to Seattle/Tacoma Intl will travel around 489.0 mi. Flights usually cover this in 1h 47m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Helena Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Helena Airport to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Helena Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Helena Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Helena Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Helena to Seattle?

  • What is the most popular airline from Helena to Seattle?

Best airlines flying from Helena to Seattle

Compare and see reviews for airlines that fly from Helena to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $137Free CancellationRating
7.9
12,739 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Helena to Seattle

    Alaska Airlines flies from Helena to Seattle around 1 time per week, with 12,734 momondo users rating the airline 7.9/10. The cheapest Alaska Airlines deal from Helena to Seattle in the last 72 hours was $137 (round-trip), much lower than the average airfare cost of $209 for Alaska Airlines flights on this route.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Kent
Lynnwood
Redmond
Lakewood
Puyallup
Tukwila
Federal Way
Fife
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

Why use momondo?

Why should I use momondo to find a flight deal from Helena to Seattle?

It is quick and easy to find Helena to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

Can I find flights from Helena to Seattle with flexible booking policies on momondo?

All flight searches from Helena to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Helena to Seattle?

momondo helps you find the best flight between Helena and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Helena to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from Helena are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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