$109 Cheap Flights from Seattle (SEA) to Helena (HLN)

View $109 flight on Sat, Aug 30, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Helena, MT (HLN-Helena Regional)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Seattle to Helena (SEA-HLN)

Prices were available within the past 7 days and start at $109 for one-way flights and $177 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Sat, Aug 30 - Sat, Sep 13
SEA
Seattle
HLN
Helena
$177 Roundtrip, found 3 hours ago
$177
Roundtrip
found 3 hours ago
Select Hawaiian Airlines flight, departing Sat, Aug 30 from Seattle to Helena, returning Sat, Sep 13, priced at $177 found 3 hours ago
Alaska Airlines
Sat, Aug 23 - Tue, Aug 26
SEA
Seattle
HLN
Helena
$178 Roundtrip, found 5 hours ago
$178
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Sat, Aug 23 from Seattle to Helena, returning Tue, Aug 26, priced at $178 found 5 hours ago
Hawaiian Airlines
Wed, Oct 1 - Sat, Oct 4
SEA
Seattle
HLN
Helena
$187 Roundtrip, found 10 hours ago
$187
Roundtrip
found 10 hours ago
Select Hawaiian Airlines flight, departing Wed, Oct 1 from Seattle to Helena, returning Sat, Oct 4, priced at $187 found 10 hours ago
Hawaiian Airlines
Sun, Aug 31 - Sat, Sep 13
SEA
Seattle
HLN
Helena
$197 Roundtrip, found 3 hours ago
$197
Roundtrip
found 3 hours ago
Select Hawaiian Airlines flight, departing Sun, Aug 31 from Seattle to Helena, returning Sat, Sep 13, priced at $197 found 3 hours ago
Delta
Wed, Aug 27 - Sat, Sep 13
SEA
Seattle
HLN
Helena
$198 Roundtrip, found 3 hours ago
$198
Roundtrip
found 3 hours ago
Select Delta flight, departing Wed, Aug 27 from Seattle to Helena, returning Sat, Sep 13, priced at $198 found 3 hours ago
Alaska Airlines
Sat, Oct 18 - Mon, Oct 20
SEA
Seattle
HLN
Helena
$198 Roundtrip, found 1 day ago
$198
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Seattle to Helena, returning Mon, Oct 20, priced at $198 found 1 day ago
Hawaiian Airlines
Wed, Oct 1 - Mon, Oct 6
SEA
Seattle
HLN
Helena
$207 Roundtrip, found 10 hours ago
$207
Roundtrip
found 10 hours ago
Select Hawaiian Airlines flight, departing Wed, Oct 1 from Seattle to Helena, returning Mon, Oct 6, priced at $207 found 10 hours ago
Alaska Airlines
Sat, Aug 30 - Thu, Sep 11
SEA
Seattle
HLN
Helena
$208 Roundtrip, found 3 hours ago
$208
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Sat, Aug 30 from Seattle to Helena, returning Thu, Sep 11, priced at $208 found 3 hours ago
Hawaiian Airlines
Sun, Aug 31 - Mon, Sep 15
SEA
Seattle
HLN
Helena
$217 Roundtrip, found 3 hours ago
$217
Roundtrip
found 3 hours ago
Select Hawaiian Airlines flight, departing Sun, Aug 31 from Seattle to Helena, returning Mon, Sep 15, priced at $217 found 3 hours ago
United
Wed, Aug 27 - Wed, Sep 3
SEA
Seattle
HLN
Helena
$277 Roundtrip, found 3 hours ago
$277
Roundtrip
found 3 hours ago
Select United flight, departing Wed, Aug 27 from Seattle to Helena, returning Wed, Sep 3, priced at $277 found 3 hours ago

Find the cheapest month to fly from Seattle (SEA) to Helena (HLN)

January is typically the cheapest month to fly

From $136 - $408 per traveler.

Graph displaying average flight prices per month

Alternative airports near Helena

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Helena Regional HLN. Cheapest and Closest option available. Average driving time to city center is 7 minutes. Flights from $308
HLN
Helena Regional
CheapestClosest
Average driving time to city center7 min
Flights from $308
Flights from Seattle (SEA) to Helena (HLN)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Helena Regional
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$177
Distance
488 mi
Average flight time
1 hour 32 mins

Seattle to Helena Flights

The cheapest times to fly from Seattle to Helena

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Helena are during the month of August. You can find some of the cheapest flights from Seattle to Helena with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Helena

Sunday is one of the best days to book for cheap flights from Seattle to Helena: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Helena

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Helena in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Helena flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Helena airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN) cost?
You can pick up cheap return flights starting from $177 from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving SEA on August 15 2025 and touching down at HLN. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from SEA to HLN?
The cheapest flights from SEA to HLN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN)?
If you're departing from Seattle - Tacoma Intl. Airport (SEA), you can board a direct flight to Helena Regional Airport (HLN) with Alaska Airlines.
What is the cheapest airline that flies from SEA to HLN?
Jet off from SEA to HLN with Alaska Airlines. This airline currently offers the cheapest one-way fare for this route, starting at $89. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SEA on October 18 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN)?
On average, just 1 nonstop flight departs daily from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN). Want additional options? Use Expedia's filter tool to discover flights with layovers and add an extra destination to your journey.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN)?
The 1 PM departures from SEA to HLN are the most sought after. They can also be more expensive. If you're hoping to save money, pick a less crowded time to fly.
What day of the week has the most flights from SEA to HLN?
Friday has the most flights from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN). Consider traveling on this day and you'll have the best chance of finding a schedule that works for you.
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN)?
The earliest flight jetting off from Seattle - Tacoma Intl. Airport (SEA) is at around 1:29PM UTC-8. Hop on this flight and you'll land at Helena Regional Airport (HLN) at approximately 4:04PM UTC-7. The total time in the air is 1h 35m.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN)?
The average flight time from SEA to HLN is 1 hour and 35 minutes, covering a total distance of 490 mi.
What airline has the least delays from SEA to HLN?
Consider traveling with American Airlines if you'd like to fly straight from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN) without any holdups. This carrier has the strongest track record for punctuality, with an on-time performance of 85%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN)?
Book a flight from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Helena from Seattle - Tacoma Intl. Airport (SEA)?
If you're taking a direct flight from Seattle - Tacoma Intl. Airport (SEA) to Helena, Helena Regional Airport (HLN) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN) last-minute?
Last-minute fares from SEA to HLN are generally more expensive. To lock in the lowest rates, start searching for flights as soon as possible. That said, if you're flexible with your travel dates, it's possible to score a cheap ticket right before your journey.
Is it cheaper to book a SEA to HLN flight and hotel package?
You can save money by booking a SEA to HLN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your preferred flights and accommodations, you can add extras such as tours, car rentals and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Helena Regional Airport (HLN)?
If you booked your SEA to HLN flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

Explore a world of travel with Expedia

*Available to One Key members.