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Cheap flights from Seattle to Helena from $139

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Helena departing on 9/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to Helena

Cheap round-trip flights

Hawaiian Airlines Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
Hawaiian Airlines Logo
4:02 pm - 4:50 pmHLN-SEA
1h 48mnonstop
$208Hawaiian Airlines
Find Deal
Sat, Aug 30 - Tue, Sep 2
Hawaiian Airlines Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
Hawaiian Airlines Logo
4:02 pm - 4:50 pmHLN-SEA
1h 48mnonstop
$298Hawaiian Airlines
Find Deal
Fri, Aug 22 - Thu, Aug 28
Alaska Airlines Logo
12:59 pm - 3:31 pmSEA-HLN
1h 32mnonstop
Alaska Airlines Logo
4:02 pm - 4:50 pmHLN-SEA
1h 48mnonstop
$328Alaska Airlines
Find Deal
Fri, Aug 15 - Sun, Aug 24
United Airlines Logo
5:02 am - 1:30 pmSEA-HLN
7h 28m1 stop
United Airlines Logo
5:20 pm - 10:59 pmHLN-SEA
6h 39m1 stop
$338United Airlines
Find Deal
Mon, Aug 25 - Fri, Aug 29
Delta Logo
5:30 am - 12:20 pmSEA-HLN
5h 50m1 stop
Delta Logo
5:50 am - 7:00 pmHLN-SEA
14h 10m1 stop
$342Delta
Find Deal
Sat, Aug 30 - Tue, Sep 2
Delta Logo
5:30 am - 12:20 pmSEA-HLN
5h 50m1 stop
Delta Logo
5:50 am - 6:35 amHLN-SEA
25h 45m2 stops
$367Delta
Find Deal
Sat, Aug 30 - Tue, Sep 2
Alaska Airlines Logo
12:59 pm - 3:31 pmSEA-HLN
1h 32mnonstop
Alaska Airlines Logo
4:02 pm - 4:50 pmHLN-SEA
1h 48mnonstop
$368Alaska Airlines
Find Deal
Thu, Aug 14 - Sat, Aug 23
Delta Logo
5:30 am - 12:20 pmSEA-HLN
5h 50m1 stop
Delta Logo
1:00 pm - 4:38 pmHLN-SEA
4h 38m1 stop
$378Delta
Find Deal
Fri, Aug 22 - Thu, Aug 28
United Airlines Logo
5:00 am - 9:15 pmSEA-HLN
15h 15m1 stop
United Airlines Logo
5:20 pm - 10:59 pmHLN-SEA
6h 39m1 stop
$461United Airlines
Find Deal
Thu, Aug 14 - Fri, Aug 22
Logo
5:02 am - 1:30 pmSEA-HLN
7h 28m1 stop
Logo
4:02 pm - 4:50 pmHLN-SEA
1h 48mnonstop
$548
Find Deal
Sat, Aug 30 - Sun, Aug 31

Alaska Airlines flights from Seattle to Helena

Our best Alaska Airlines deals on Seattle to Helena flight tickets
Alaska Airlines
Aug 15
SEA12:59 pmSeattle/Tacoma Intl
1h 32m
HLN3:31 pmHelena
Aug 24
HLN4:02 pmHelena
1h 48m
SEA4:50 pmSeattle/Tacoma Intl
$328
Find similar
Alaska Airlines
Aug 14
SEA12:59 pmSeattle/Tacoma Intl
1h 32m
HLN3:31 pmHelena
Aug 23
HLN4:02 pmHelena
1h 48m
SEA4:50 pmSeattle/Tacoma Intl
$368
Find similar
Alaska Airlines
Aug 12
SEA12:59 pmSeattle/Tacoma Intl
1h 32m
HLN3:31 pmHelena
Aug 21
HLN4:02 pmHelena
1h 48m
SEA4:50 pmSeattle/Tacoma Intl
$388
Find similar

United Airlines flights from Seattle to Helena

Our best United Airlines deals on Seattle to Helena flight tickets
United Airlines
Aug 25
SEA5:02 amSeattle/Tacoma Intl
7h 28m
1 stop
HLN1:30 pmHelena
Aug 29
HLN5:20 pmHelena
6h 39m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$338
Find similar
United Airlines
Aug 14
SEA5:00 amSeattle/Tacoma Intl
15h 15m
1 stop
HLN9:15 pmHelena
Aug 22
HLN5:20 pmHelena
6h 39m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$461
Find similar
United Airlines
Aug 22
SEA5:14 pmSeattle/Tacoma Intl
21h 50m
3 stops
HLN4:04 pmHelena
Aug 28
HLN5:20 pmHelena
6h 39m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$472
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Helena 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 August 2, 2025.
Use the filters below to find and compare flights from Seattle to Helena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Sat 8/30

12:46 pm-3:21 pm

Nonstop1h 35m

Helena

Tue 9/2

4:02 pm-4:50 pm

Nonstop1h 48m

$208

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Fri 8/22

12:46 pm-3:21 pm

Nonstop1h 35m

Helena

Thu 8/28

4:02 pm-4:50 pm

Nonstop1h 48m

$298

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Fri 8/15

12:59 pm-3:31 pm

Nonstop1h 32m

Helena

Sun 8/24

4:02 pm-4:50 pm

Nonstop1h 48m

$328

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Mon 8/25

5:02 am-1:30 pm

1 stop7h 28m

Helena

Fri 8/29

5:20 pm-10:59 pm

1 stop6h 39m

$338

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Sat 8/30

5:30 am-12:20 pm

1 stop5h 50m

Helena

Tue 9/2

5:50 am-7:00 pm

1 stop14h 10m

$342

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Sat 8/30

5:30 am-12:20 pm

1 stop5h 50m

Helena

Tue 9/2

5:50 am-6:35 am

2 stops25h 45m

$367

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Thu 8/14

12:59 pm-3:31 pm

Nonstop1h 32m

Helena

Sat 8/23

4:02 pm-4:50 pm

Nonstop1h 48m

$368

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Fri 8/22

5:30 am-12:20 pm

1 stop5h 50m

Helena

Thu 8/28

1:00 pm-4:38 pm

1 stop4h 38m

$378

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Thu 8/14

5:00 am-9:15 pm

1 stop15h 15m

Helena

Fri 8/22

5:20 pm-10:59 pm

1 stop6h 39m

$461

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Sat 8/30

5:02 am-1:30 pm

1 stop7h 28m

Helena

Sun 8/31

4:02 pm-4:50 pm

Nonstop1h 48m

$548

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 Helena from

How to get the cheapest flight ticket from Seattle to Helena

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 cheapest month to fly to Helena?

If you aren’t able to travel to Helena during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $238.

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

The cheapest day to depart from Seattle to Helena is on a Friday. Travelers who choose to depart for Helena on a Friday will often find tickets for as low as $238. The most expensive day to fly to Helena is Wednesday, with ticket prices averaging around $352.

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

According to our data, the cheapest time of day to fly to Helena is in the afternoon. momondo users have found flights departing from Seattle to Helena in the afternoon for as low as $227. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is in the morning when prices are around $308.

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

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

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

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Helena 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 Seattle to Helena flights?

You could potentially save up to 38% on your flight if you consider stops on a Seattle to Helena flight.

How have Seattle to Helena flight prices changed over time?

When to book flights from Seattle to Helena

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

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

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

Best Price Found

$139

Fastest flight time

1h 32m

Direct flights

Every day

Airports in Helena

1 airport
The best one-way flight to Helena from Seattle in the past 72 hours is $139. The best round-trip flight deal from Seattle to Helena found on momondo in the last 72 hours is $208.
The fastest flight from Seattle to Helena takes 1h 32m
Direct flights go from Seattle to Helena every day.
There is 1 airport near Helena: Helena (HLN)
Search flight deals

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

    Helena is 489.0 mi away from Seattle/Tacoma Intl. Typically, this will take 1h 32m by plane in normal conditions.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Helena Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Helena Airport.

  • What documentation or ID do you need to fly to Helena Airport?

    The necessary travel and health documents for your Helena Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from Seattle to Helena

Compare and see reviews for airlines that fly from Seattle to Helena with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $157Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Helena

    Alaska Airlines flight deals from Seattle to Helena start from $157 round-trip. Over the 7 Alaska Airlines flights for this route in a normal week, average airfare is usually $280 round-trip - but some users have found much cheaper deals with momondo.

Why use momondo?

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

Finding the right flight to Helena from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Helena quick and easy, saving you time and money.

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

Flights from Seattle to Helena with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Seattle to Helena flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Seattle to Helena flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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