What is the cheapest airline that flies from Helena to Seattle/Tacoma Intl?

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Helena to Seattle/Tacoma Intl

How many flights depart from Helena to Seattle on average per week?

As of July 2025, there are 6 flights per week flying from Helena to Seattle. The most common day of the week flights depart is Wed, with 50% of flights taking off on this day.

What airlines fly to Seattle?

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Seattle from Helena according to our data. Alaska Airlines is the first choice among our users, with 87% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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?

As of July 2025, there are 3 operators available to choose from 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.

$109 Cheap Flights from Helena to Seattle in 2025

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Find the cheapest flights from Helena to Seattle

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

4:02 pm - 4:50 pmHLN-SEA

1h 48mnonstop

12:46 pm - 3:21 pmSEA-HLN

1h 35mnonstop

$178Alaska Airlines

Find Deal

Tue, Sep 16 - Sat, Sep 20

5:50 am - 8:55 amHLN-SEA

4h 05m1 stop

7:10 am - 12:20 pmSEA-HLN

4h 10m1 stop

$198Delta

Find Deal

Wed, Aug 20 - Wed, Aug 27

6:13 pm - 7:02 pmHLN-SEA

1h 49mnonstop

3:00 pm - 5:36 pmSEA-HLN

1h 36mnonstop

$217Alaska Airlines

Find Deal

Thu, Nov 13 - Sun, Nov 16

1:00 pm - 6:36 pmHLN-SEA

6h 36m1 stop

5:30 am - 12:20 pmSEA-HLN

5h 50m1 stop

$227Delta

Find Deal

Sat, Sep 27 - Tue, Sep 30

4:02 pm - 4:50 pmHLN-SEA

1h 48mnonstop

12:46 pm - 3:21 pmSEA-HLN

1h 35mnonstop

$228Alaska Airlines

Find Deal

Tue, Sep 16 - Wed, Sep 17

4:02 pm - 4:50 pmHLN-SEA

1h 48mnonstop

12:46 pm - 3:21 pmSEA-HLN

1h 35mnonstop

$238Alaska Airlines

Find Deal

Tue, Sep 16 - Sun, Sep 21

2:22 pm - 9:13 pmHLN-SEA

7h 51m1 stop

5:05 am - 1:27 pmSEA-HLN

7h 22m1 stop

$277United Airlines

Find Deal

Thu, Nov 13 - Sun, Nov 16

4:02 pm - 4:50 pmHLN-SEA

1h 48mnonstop

12:46 pm - 3:21 pmSEA-HLN

1h 35mnonstop

$278Hawaiian Airlines

Find Deal

Mon, Sep 8 - Wed, Sep 10

5:20 pm - 10:59 pmHLN-SEA

6h 39m1 stop

5:02 am - 1:30 pmSEA-HLN

7h 28m1 stop

$327United Airlines

Find Deal

Wed, Sep 17 - Sun, Sep 21

4:08 pm - 4:55 pmHLN-SEA

1h 47mnonstop

12:59 pm - 3:31 pmSEA-HLN

1h 32mnonstop

$448Hawaiian Airlines

Find Deal

Wed, Aug 13 - Sun, Aug 17

Hawaiian Airlines flights from Helena to Seattle

Our best Hawaiian Airlines deals on Helena to Seattle flight tickets

Hawaiian Airlines

Sep 8

HLN4:02 pmHelena

1h 48m

SEA4:50 pmSeattle/Tacoma Intl

Sep 10

SEA12:46 pmSeattle/Tacoma Intl

1h 35m

HLN3:21 pmHelena

$278

Find similar

Hawaiian Airlines

Aug 13

HLN4:08 pmHelena

1h 47m

SEA4:55 pmSeattle/Tacoma Intl

Aug 17

SEA12:59 pmSeattle/Tacoma Intl

1h 32m

HLN3:31 pmHelena

$448

Find similar

Hawaiian Airlines

Aug 14

HLN4:08 pmHelena

1h 47m

SEA4:55 pmSeattle/Tacoma Intl

Aug 18

SEA12:59 pmSeattle/Tacoma Intl

1h 32m

HLN3:31 pmHelena

$578

Find similar

United Airlines flights from Helena to Seattle

Our best United Airlines deals on Helena to Seattle flight tickets

United Airlines

Nov 13

HLN2:22 pmHelena

7h 51m

1 stop

SEA9:13 pmSeattle/Tacoma Intl

Nov 16

SEA5:05 amSeattle/Tacoma Intl

7h 22m

1 stop

HLN1:27 pmHelena

$277

Find similar

United Airlines

Sep 17

HLN5:20 pmHelena

6h 39m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Sep 21

SEA5:02 amSeattle/Tacoma Intl

7h 28m

1 stop

HLN1:30 pmHelena

$327

Find similar

United Airlines

Sep 17

HLN5:20 pmHelena

6h 39m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Sep 20

SEA5:02 amSeattle/Tacoma Intl

7h 28m

1 stop

HLN1:30 pmHelena

$387

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 9/16

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Sat 9/20

12:46 pm-3:21 pm

Nonstop1h 35m

$178

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 8/20

5:50 am-8:55 am

1 stop4h 05m

Seattle/Tacoma Intl

Wed 8/27

7:10 am-12:20 pm

1 stop4h 10m

$198

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 11/13

6:13 pm-7:02 pm

Nonstop1h 49m

Seattle/Tacoma Intl

Sun 11/16

3:00 pm-5:36 pm

Nonstop1h 36m

$217

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/27

1:00 pm-6:36 pm

1 stop6h 36m

Seattle/Tacoma Intl

Tue 9/30

5:30 am-12:20 pm

1 stop5h 50m

$227

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 9/16

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Wed 9/17

12:46 pm-3:21 pm

Nonstop1h 35m

$228

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 9/16

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Sun 9/21

12:46 pm-3:21 pm

Nonstop1h 35m

$238

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 11/13

2:22 pm-9:13 pm

1 stop7h 51m

Seattle/Tacoma Intl

Sun 11/16

5:05 am-1:27 pm

1 stop7h 22m

$277

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Mon 9/8

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Wed 9/10

12:46 pm-3:21 pm

Nonstop1h 35m

$278

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 9/17

5:20 pm-10:59 pm

1 stop6h 39m

Seattle/Tacoma Intl

Sun 9/21

5:02 am-1:30 pm

1 stop7h 28m

$327

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 8/13

4:08 pm-4:55 pm

Nonstop1h 47m

Seattle/Tacoma Intl

Sun 8/17

12:59 pm-3:31 pm

Nonstop1h 32m

$448

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Seattle?

In general, January 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 $197. If you don’t want to visit Seattle in January, then you should wait until February to fly from Helena, when ticket prices are also cheap, with an average price of $227.

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 Thursday. momondo users have found tickets for Thursday departures for as low as $397. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday 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 $504.

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

Flying to Seattle from Helena in the evening is the least expensive time of day to depart. momondo users have found prices as low as $411 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $486. Departure times in the morning 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/Tacoma Intl flights?

There are 3 cabin classes available to choose from on Helena to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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	$109
Fastest flight time	1h 47m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in Seattle	1 airport

The best one-way flight to Seattle from Helena in the past 72 hours is $109. The best round-trip flight deal from Helena to Seattle found on momondo in the last 72 hours is $178.

The fastest flight from Helena to Seattle takes 1h 47m

Direct flights go from Helena to Seattle on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Airlines offering direct flights are: Alaska Airlines and Hawaiian Airlines.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

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?
As of July 2025, there are 3 operators available to choose from 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?
Based on momondo bookings for flights between Helena and Seattle, the leading plane model is Embraer 175, making up 52.63% of the total bookings. Other popular models include Boeing 737-800 with 15.79%, Embraer 175 (Enhanced Winglets) with 5.26%, and Boeing 737-900 Passenger/BBJ3 (winglets) with 5.26%.
What is the most popular airline from Helena to Seattle?
momondo data reveals that the most frequently booked airline on the route from Helena to Seattle is Alaska Airlines, representing 79% of all bookings. The subsequent popular airlines are Delta at 14% and Hawaiian Airlines at 7%.

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
Hawaiian Airlines	PriceFrom $149	Free Cancellation	Rating 7.8 2,611 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $196	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Delta	PriceFrom $246	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights

Alaska Airlines Flights From Helena to Seattle
Alaska Airlines flies from Helena to Seattle around 2 times per week, with 10,000 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Helena to Seattle in the last 72 hours was $196 (round-trip), much lower than the average airfare cost of $272 for Alaska Airlines flights on this route.
Hawaiian Airlines Flights From Helena to Seattle
Another popular option for Helena to Seattle flights is Hawaiian Airlines (7.8/10, 2,611 ratings). Hawaiian Airlines flies from Helena to Seattle around 2 times per week, with deals starting from $149 round-trip and rising to an average price of around $268.

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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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Cheap flights from Helena to Seattle 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 Helena to Seattle departing on 8/26. 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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Hawaiian Airlines flights from Helena to Seattle

Our best Hawaiian Airlines deals on Helena to Seattle flight tickets

United Airlines flights from Helena to Seattle

Our best United Airlines deals on Helena to Seattle flight tickets

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Use the filters below to find and compare flights from Helena to Seattle that are best for you.

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 cheapest month to fly to Seattle?

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

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

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/Tacoma Intl flights?

There are 3 cabin classes available to choose from on Helena to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Helena to Seattle flight prices changed over time?

What is the cheapest airline that flies from Helena to Seattle/Tacoma Intl?

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Helena to Seattle/Tacoma Intl

What airlines fly to Seattle?

How many flights depart from Helena to Seattle on average per week?

As of July 2025, there are 6 flights per week flying from Helena to Seattle. The most common day of the week flights depart is Wed, with 50% of flights taking off on this day.

When to book flights from Helena to Seattle

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

Fastest flight time

Direct flights

Airports in Seattle

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

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

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?

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

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

Alaska Airlines Flights From Helena to Seattle

Hawaiian Airlines Flights From Helena to Seattle

Traveling to a place near Seattle?

Why use momondo?

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

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

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

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

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Washington