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Cheap flights from Seattle to Helena from $109

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 4/30. 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

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Find the cheapest flights from Seattle to Helena

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
3:07 pm - 5:45 pm
SEA
-
HLN
1h 38mnonstop
Alaska Airlines Logo
6:22 pm - 7:09 pm
HLN
-
SEA
1h 47mnonstop
$177Alaska Airlines
Wed, Apr 29 - Sat, May 2
Alaska Airlines Logo
3:07 pm - 5:45 pm
SEA
-
HLN
1h 38mnonstop
Alaska Airlines Logo
6:22 pm - 7:09 pm
HLN
-
SEA
1h 47mnonstop
$207Alaska Airlines
Tue, Apr 28 - Tue, May 5
Delta Logo
5:30 am - 12:23 pm
SEA
-
HLN
5h 53m
1 stop
Delta Logo
1:03 pm - 6:46 pm
HLN
-
SEA
6h 43m
1 stop
$258Delta
Fri, May 29 - Tue, Jun 2
Alaska Airlines Logo
1:58 pm - 4:34 pm
SEA
-
HLN
1h 36mnonstop
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
SEA
1h 56mnonstop
$293Alaska Airlines
Sun, Aug 30 - Tue, Sep 15
Alaska Airlines Logo
1:58 pm - 4:34 pm
SEA
-
HLN
1h 36mnonstop
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
SEA
1h 56mnonstop
$295Alaska Airlines
Sun, Aug 30 - Tue, Sep 15
Alaska Airlines Logo
1:57 pm - 4:32 pm
SEA
-
HLN
1h 35mnonstop
Alaska Airlines Logo
5:09 pm - 6:01 pm
HLN
-
SEA
1h 52mnonstop
$297Alaska Airlines
Tue, Jul 21 - Tue, Jul 28
United Airlines Logo
5:00 am - 1:39 pm
SEA
-
HLN
7h 39m
1 stop
United Airlines Logo
2:30 pm - 9:06 pm
HLN
-
SEA
7h 36m
1 stop
$307United Airlines
Wed, Apr 29 - Sat, May 2
United Airlines Logo
5:00 am - 1:39 pm
SEA
-
HLN
7h 39m
1 stop
United Airlines Logo
2:30 pm - 11:29 pm
HLN
-
SEA
9h 59m
2 stops
$312United Airlines
Wed, Apr 29 - Sat, May 2
Delta Logo
5:45 am - 12:23 pm
SEA
-
HLN
5h 38m
1 stop
Delta Logo
12:50 pm - 4:52 pm
HLN
-
SEA
5h 02m
1 stop
$317Delta
Sun, Aug 30 - Tue, Sep 15
Alaska Airlines Logo
1:30 pm - 4:06 pm
SEA
-
HLN
1h 36mnonstop
Alaska Airlines Logo
4:43 pm - 5:33 pm
HLN
-
SEA
1h 50mnonstop
$337Alaska Airlines
Mon, Jun 1 - Thu, Jun 4

Delta flights from Seattle to Helena

Our best Delta deals on Seattle to Helena flight tickets
Delta
May 29
SEA5:30 amSeattle/Tacoma Intl
5h 53m
1 stop
HLN12:23 pmHelena
Jun 2
HLN1:03 pmHelena
6h 43m
1 stop
SEA6:46 pmSeattle/Tacoma Intl
$258
Delta
Aug 30
SEA5:45 amSeattle/Tacoma Intl
5h 38m
1 stop
HLN12:23 pmHelena
Sep 15
HLN12:50 pmHelena
5h 02m
1 stop
SEA4:52 pmSeattle/Tacoma Intl
$317
Delta
Apr 18
SEA5:35 amSeattle/Tacoma Intl
5h 49m
1 stop
HLN12:24 pmHelena
Apr 22
HLN5:40 amHelena
4h 35m
1 stop
SEA9:15 amSeattle/Tacoma Intl
$347

Alaska Airlines flights from Seattle to Helena

Our best Alaska Airlines deals on Seattle to Helena flight tickets
Alaska Airlines
Apr 29
SEA3:07 pmSeattle/Tacoma Intl
1h 38m
HLN5:45 pmHelena
May 2
HLN6:22 pmHelena
1h 47m
SEA7:09 pmSeattle/Tacoma Intl
$177
Alaska Airlines
Apr 28
SEA3:07 pmSeattle/Tacoma Intl
1h 38m
HLN5:45 pmHelena
May 5
HLN6:22 pmHelena
1h 47m
SEA7:09 pmSeattle/Tacoma Intl
$207
Alaska Airlines
Aug 30
SEA1:58 pmSeattle/Tacoma Intl
1h 36m
HLN4:34 pmHelena
Sep 15
HLN5:18 pmHelena
1h 56m
SEA6:14 pmSeattle/Tacoma Intl
$293

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 April 1, 2026.
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

Cheapest round-trip
Quickest round-trip

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Wed 4/29

3:07 pm-5:45 pm

Nonstop1h 38m

Helena

Sat 5/2

6:22 pm-7:09 pm

Nonstop1h 47m

$177

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Tue 4/28

3:07 pm-5:45 pm

Nonstop1h 38m

Helena

Tue 5/5

6:22 pm-7:09 pm

Nonstop1h 47m

$207

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Fri 5/29

5:30 am-12:23 pm

1 stop5h 53m

Helena

Tue 6/2

1:03 pm-6:46 pm

1 stop6h 43m

$258

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Sun 8/30

1:58 pm-4:34 pm

Nonstop1h 36m

Helena

Tue 9/15

5:18 pm-6:14 pm

Nonstop1h 56m

$293

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Sun 8/30

1:58 pm-4:34 pm

Nonstop1h 36m

Helena

Tue 9/15

5:18 pm-6:14 pm

Nonstop1h 56m

$295

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Tue 7/21

1:57 pm-4:32 pm

Nonstop1h 35m

Helena

Tue 7/28

5:09 pm-6:01 pm

Nonstop1h 52m

$297

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Wed 4/29

5:00 am-1:39 pm

1 stop7h 39m

Helena

Sat 5/2

2:30 pm-9:06 pm

1 stop7h 36m

$307

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Wed 4/29

5:00 am-1:39 pm

1 stop7h 39m

Helena

Sat 5/2

2:30 pm-11:29 pm

2 stops9h 59m

$312

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Sun 8/30

5:45 am-12:23 pm

1 stop5h 38m

Helena

Tue 9/15

12:50 pm-4:52 pm

1 stop5h 02m

$317

SeattleHelena

SEA - HLN

SEAHLN

Seattle/Tacoma Intl

Mon 6/1

1:30 pm-4:06 pm

Nonstop1h 36m

Helena

Thu 6/4

4:43 pm-5:33 pm

Nonstop1h 50m

$337

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

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

The cheapest day to depart from Seattle to Helena is on a Tuesday. Travelers who choose to depart for Helena on a Tuesday will often find tickets for as low as $187. The most expensive day to fly to Helena is Wednesday, with ticket prices averaging around $298.

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 $195. 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 at noon when prices are around $368.

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 4 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?

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

How have Seattle to Helena flight prices changed over time?

As of April 2026, prices for Seattle to Helena flights are approximately 2% cheaper when compared to flights at the same time last year.

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

$137

Fastest flight time

1h 36m

Direct flights

Every day

Airports in Helena

1 airport
The best flight deal from Seattle to Helena found on momondo in the last 72 hours is $137
The fastest flight from Seattle to Helena takes 1h 36m
Direct flights go from Seattle to Helena every day.
There is 1 airport in Helena. From Seattle there are direct flights to Helena (HLN).
Search flight deals

Frequently asked questions about flying from Seattle to Helena

  • 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 36m 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 $137Free CancellationRating
7.9
12,145 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Helena

    Alaska Airlines flight deals from Seattle to Helena start from $137 round-trip. Over the 3 Alaska Airlines flights for this route in a normal week, average airfare is usually $207 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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