HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Helena

$118+ Cheap flights from Ontario to Helena (ONT - HLN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HLN
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Helena with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Helena

Best flights from Ontario to Helena
Discover carefully curated flight deals from Ontario to Helena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:14 amONT - HLN
1 stop8h 45mAlaska Airlines
Wed 3/44:36 pmHLN - ONT
1 stop7h 08mAlaska Airlines
Deal found 12/17$284
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/256:00 amONT - HLN
1 stop5h 27mDelta
Fri 1/301:10 pmHLN - ONT
2 stops10h 41mDelta
Deal found 12/16$334
This Alaska Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2211:53 amONT - HLN
1 stop5h 18mAlaska Airlines
Mon 1/266:48 pmHLN - ONT
1 stop6h 08mAlaska Airlines
Deal found 12/15$284
This Alaska Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/511:53 amONT - HLN
1 stop5h 18mAlaska Airlines
Sun 2/86:48 pmHLN - ONT
1 stop17h 11mAlaska Airlines
Deal found 12/16$284
This Alaska Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:14 amONT - HLN
1 stop8h 45mAlaska Airlines
Wed 3/114:36 pmHLN - ONT
1 stop7h 08mAlaska Airlines
Deal found 12/17$290
This Alaska Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/256:00 amONT - HLN
1 stop11h 11mAlaska Airlines
Fri 1/306:48 pmHLN - ONT
1 stop26h 48mAlaska Airlines
Deal found 12/16$294

Find flight deals from Ontario to Helena

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Helena (HLN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$284
(Alaska Airlines)

One-way from

$118
(Alaska Airlines)

Popular in

February

Cheapest in

March

Average price

$603
Provider with most accurate pricing for Ontario-Helena flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Helena flights.
Search Deals
From Ontario to Helena
Search Deals
One-way flight from Ontario to Helena
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario 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, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Ontario to Helena that are best for you.

Fly from

Ontario

Fly to

Helena

Route

Depart

Return

Price

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 2/28

6:14 am-3:59 pm

1 stop8h 45m

Helena

Wed 3/4

4:36 pm-10:44 pm

1 stop7h 08m

$284

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 1/22

11:53 am-6:11 pm

1 stop5h 18m

Helena

Mon 1/26

6:48 pm-11:56 pm

1 stop6h 08m

$284

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 2/5

11:53 am-6:11 pm

1 stop5h 18m

Helena

Sun 2/8

6:48 pm-10:59 am

1 stop17h 11m

$284

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 3/10

6:14 am-3:59 pm

1 stop8h 45m

Helena

Wed 3/11

4:36 pm-10:44 pm

1 stop7h 08m

$290

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sun 1/25

6:00 am-6:11 pm

1 stop11h 11m

Helena

Fri 1/30

6:48 pm-8:36 pm

1 stop26h 48m

$294

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sun 1/25

6:00 am-12:27 pm

1 stop5h 27m

Helena

Fri 1/30

1:10 pm-10:51 pm

2 stops10h 41m

$334

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 1/28

11:53 am-6:11 pm

1 stop5h 18m

$118

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 3/10

1:50 pm-9:25 pm

1 stop6h 35m

$154

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 1/29

11:53 am-6:11 pm

1 stop5h 18m

$164

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 6/15

5:05 pm-10:34 pm

1 stop4h 29m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 13 results
1
2

Compare providers for flights from Ontario to Helena

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Helena in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Helena flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Helena flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Helena flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Helena flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Helena flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Helena

What is the cheapest month to book a flight from Ontario to Helena?

Currently, May is the cheapest month in which you can book a flight from Ontario to Helena (average of $90). Flying from Ontario to Helena in November is currently the most expensive (average of $201). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Helena

Get insights into the airlines that provide service to Helena. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helena. Reviews last updated December 18, 2025.
Read reviews from past customers who have flown Delta from Ontario to Helena. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,004 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
7.9
Good
8,004 reviews
Delta
7.9
Good
8,004 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Helena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Helena?

    Airlines like Alaska Airlines fly from Ontario to Helena in about 8h 45m. The time it takes to get you to your destination can typically vary by up to . There are 915 mi between Ontario and Helena.

  • What is the cheapest airline to fly from Ontario to Helena round-trip?

    Flying on Delta is currently your cheapest option to Helena, with prices starting at $184.

  • Can I find deals for flights from Ontario to Helena that include hotel bookings?

    Yes. In addition to deals on Ontario to Helena flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Helena?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Helena.

  • Can I find deals for business class flights from Ontario to Helena?

    Yes. Cheapflights offers flight deals from Ontario to Helena by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Helena?

    Currently, May is the cheapest month in which you can book a flight from Ontario to Helena (average of $90). Flying from Ontario to Helena in November is currently the most expensive (average of $201). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Helena

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Bozeman flights
Los Angeles to Bozeman flights
Ontario to Bozeman flights
San Francisco to Kalispell flights
San Diego to Bozeman flights
Santa Ana to Bozeman flights
Los Angeles to Missoula flights
Las Vegas to Bozeman flights
San Diego to Kalispell flights
Los Angeles to Kalispell flights
Reno to Bozeman flights
Sacramento to Bozeman flights
San Jose to Bozeman flights
San Diego to Missoula flights
Santa Ana to Kalispell flights
Los Angeles to Great Falls flights
Las Vegas to Kalispell flights
San Francisco to Missoula flights
Ontario to Kalispell flights
Ontario to Missoula flights
Oakland to Bozeman flights
Burbank to Bozeman flights
Oakland to Kalispell flights
San Diego to Great Falls flights
San Jose to Kalispell flights
Los Angeles to Billings flights
San Francisco to Billings flights
Burbank to Missoula flights
Sacramento to Kalispell flights
San Luis Obispo to Bozeman flights
Long Beach to Bozeman flights
Palm Springs to Bozeman flights
Burbank to Kalispell flights
San Diego to Billings flights
Ontario to Billings flights
Monterey to Bozeman flights
Santa Barbara to Kalispell flights
Fresno to Bozeman flights
Las Vegas to Missoula flights
Medford to Bozeman flights
Santa Ana to Great Falls flights
Fresno to Kalispell flights
Palm Springs to Billings flights
Sacramento to Billings flights
San Jose to Helena flights
Burbank to Great Falls flights
Los Angeles to Helena flights
San Jose to Billings flights
Las Vegas to Billings flights

Top airline flying from Ontario to Helena

Discover the top airline that operate flights from Ontario to Helena. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$205Average$410FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
Cookie settings©2025 Cheapflights