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Cheap flights from Helena to Seattle from $159

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 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
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
6:48 pm - 7:47 pm
HLN
-
SEA
1h 59mnonstop
Alaska Airlines Logo
3:31 pm - 6:11 pm
SEA
-
HLN
1h 40mnonstop
$177Alaska Airlines
sáb., ene. 10 - sáb., ene. 17
Alaska Airlines Logo
6:48 pm - 7:47 pm
HLN
-
SEA
1h 59mnonstop
Alaska Airlines Logo
3:31 pm - 6:11 pm
SEA
-
HLN
1h 40mnonstop
$197Alaska Airlines
jue., ene. 15 - lun., ene. 19
Delta Logo
1:10 pm - 6:29 pm
HLN
-
SEA
6h 19m1 stop
Delta Logo
4:55 pm - 10:29 pm
SEA
-
HLN
4h 34m1 stop
$207Delta
vie., ene. 30 - lun., feb. 2
Delta Logo
1:10 pm - 6:29 pm
HLN
-
SEA
6h 19m1 stop
Delta Logo
5:25 am - 12:27 pm
SEA
-
HLN
6h 02m1 stop
$237Delta
mar., ene. 6 - vie., ene. 9
Delta Logo
5:30 am - 9:19 am
HLN
-
SEA
4h 49m1 stop
Delta Logo
5:25 am - 12:27 pm
SEA
-
HLN
6h 02m1 stop
$252Delta
sáb., ene. 10 - sáb., ene. 17
Delta Logo
1:05 pm - 4:48 pm
HLN
-
SEA
4h 43m1 stop
Delta Logo
5:30 am - 12:19 pm
SEA
-
HLN
5h 49m1 stop
$262Delta
vie., mar. 6 - lun., mar. 9
United Airlines Logo
2:25 pm - 9:12 pm
HLN
-
SEA
7h 47m1 stop
United Airlines Logo
5:00 am - 1:40 pm
SEA
-
HLN
7h 40m1 stop
$277United Airlines
sáb., feb. 14 - mié., feb. 18
Delta Logo
5:45 am - 9:20 am
HLN
-
SEA
4h 35m1 stop
Delta Logo
4:55 pm - 10:34 pm
SEA
-
HLN
4h 39m1 stop
$317Delta
mié., abr. 29 - mié., abr. 29
Alaska Airlines Logo
6:48 pm - 7:47 pm
HLN
-
SEA
1h 59mnonstop
Alaska Airlines Logo
3:31 pm - 6:11 pm
SEA
-
HLN
1h 40mnonstop
$327Alaska Airlines
sáb., ene. 10 - sáb., ene. 17
Alaska Airlines Logo
4:10 pm - 4:51 pm
HLN
-
SEA
1h 41mnonstop
Alaska Airlines Logo
12:59 pm - 3:31 pm
SEA
-
HLN
1h 32mnonstop
$328Alaska Airlines
jue., may. 7 - vie., jul. 31

Alaska Airlines flights from Helena to Seattle

Our best Alaska Airlines deals on Helena to Seattle flight tickets
Alaska Airlines
Feb 14
HLN4:36 pmHelena
1h 50m
SEA5:26 pmSeattle/Tacoma Intl
Feb 18
SEA1:21 pmSeattle/Tacoma Intl
1h 38m
HLN3:59 pmHelena
$177
Find similar
Alaska Airlines
Mar 5
HLN4:36 pmHelena
1h 50m
SEA5:26 pmSeattle/Tacoma Intl
Mar 10
SEA1:21 pmSeattle/Tacoma Intl
1h 38m
HLN3:59 pmHelena
$187
Find similar
Alaska Airlines
Jan 15
HLN6:48 pmHelena
1h 59m
SEA7:47 pmSeattle/Tacoma Intl
Jan 19
SEA3:31 pmSeattle/Tacoma Intl
1h 40m
HLN6:11 pmHelena
$197
Find similar

United Airlines flights from Helena to Seattle

Our best United Airlines deals on Helena to Seattle flight tickets
United Airlines
Feb 14
HLN2:25 pmHelena
7h 47m
1 stop
SEA9:12 pmSeattle/Tacoma Intl
Feb 18
SEA12:55 pmSeattle/Tacoma Intl
7h 21m
1 stop
HLN9:16 pmHelena
$277
Find similar
United Airlines
Jan 10
HLN6:15 amHelena
8h 43m
1 stop
SEA1:58 pmSeattle/Tacoma Intl
Jan 17
SEA5:12 pmSeattle/Tacoma Intl
27h 14m
2 stops
HLN9:26 pmHelena
$412
Find similar
United Airlines
Mar 5
HLN2:30 pmHelena
7h 44m
1 stop
SEA9:14 pmSeattle/Tacoma Intl
Mar 10
SEA9:20 amSeattle/Tacoma Intl
27h 18m
2 stops
HLN1:38 pmHelena
$416
Find similar

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 diciembre 15, 2025.
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

HelenaSeattle

HLN - SEA

HLNSEA

Helena

sáb. 1/10

6:48 pm-7:47 pm

Nonstop1h 59m

Seattle/Tacoma Intl

sáb. 1/17

3:31 pm-6:11 pm

Nonstop1h 40m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

jue. 1/15

6:48 pm-7:47 pm

Nonstop1h 59m

Seattle/Tacoma Intl

lun. 1/19

3:31 pm-6:11 pm

Nonstop1h 40m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

vie. 1/30

1:10 pm-6:29 pm

1 stop6h 19m

Seattle/Tacoma Intl

lun. 2/2

4:55 pm-10:29 pm

1 stop4h 34m

$207

HelenaSeattle

HLN - SEA

HLNSEA

Helena

mar. 1/6

1:10 pm-6:29 pm

1 stop6h 19m

Seattle/Tacoma Intl

vie. 1/9

5:25 am-12:27 pm

1 stop6h 02m

$237

HelenaSeattle

HLN - SEA

HLNSEA

Helena

sáb. 1/10

5:30 am-9:19 am

1 stop4h 49m

Seattle/Tacoma Intl

sáb. 1/17

5:25 am-12:27 pm

1 stop6h 02m

$252

HelenaSeattle

HLN - SEA

HLNSEA

Helena

vie. 3/6

1:05 pm-4:48 pm

1 stop4h 43m

Seattle/Tacoma Intl

lun. 3/9

5:30 am-12:19 pm

1 stop5h 49m

$262

HelenaSeattle

HLN - SEA

HLNSEA

Helena

sáb. 2/14

2:25 pm-9:12 pm

1 stop7h 47m

Seattle/Tacoma Intl

mié. 2/18

5:00 am-1:40 pm

1 stop7h 40m

$277

HelenaSeattle

HLN - SEA

HLNSEA

Helena

mié. 4/29

5:45 am-9:20 am

1 stop4h 35m

Seattle/Tacoma Intl

mié. 4/29

4:55 pm-10:34 pm

1 stop4h 39m

$317

HelenaSeattle

HLN - SEA

HLNSEA

Helena

sáb. 1/10

6:48 pm-7:47 pm

Nonstop1h 59m

Seattle/Tacoma Intl

sáb. 1/17

3:31 pm-6:11 pm

Nonstop1h 40m

$327

HelenaSeattle

HLN - SEA

HLNSEA

Helena

jue. 5/7

4:10 pm-4:51 pm

Nonstop1h 41m

Seattle/Tacoma Intl

vie. 7/31

12:59 pm-3:31 pm

Nonstop1h 32m

$328

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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?

What is the cheapest month to fly to Seattle?

In general, November 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 $157. If you don’t want to visit Seattle in November, then you should wait until January to fly from Helena, when ticket prices are also cheap, with an average price of $177.

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 $359. 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 $572.

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 $452 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $458. Departure times in the afternoon 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.

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

$284

Fastest flight time

5h 38m

Direct flights

Tue, Wed, Thu, Fri, Sat and Sun

Airports in Seattle

1 airport
The best one-way flight to Seattle from Helena in the past 72 hours is $284. The best round-trip flight deal from Helena to Seattle found on momondo in the last 72 hours is $285.
The fastest flight from Helena to Seattle takes 5h 38m
Direct flights go from Helena to Seattle on Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport in Seattle. From Helena there are direct flights to 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 5h 38m, 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
Hawaiian AirlinesPriceFrom $149Free CancellationRating
7.8
2,819 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $156Free CancellationRating
8.0
11,452 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Helena to Seattle

    Alaska Airlines flies from Helena to Seattle around 5 times per week, with 11,452 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Helena to Seattle in the last 72 hours was $156 (round-trip), much lower than the average airfare cost of $287 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, 2,819 ratings). Hawaiian Airlines flies from Helena to Seattle around 6 times per week, with deals starting from $149 round-trip and rising to an average price of around $268.

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
Lynnwood
Kent
Marysville
Puyallup
Redmond
Tukwila
Cle Elum
Federal Way
Lakewood
Fife
Centralia
Westport
Kirkland
Shoreline

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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