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Helena

$197+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HLN
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap flight deals from Ontario to Helena

Cheapest flights from Ontario to Helena
Explore the most affordable flight options available from Ontario to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

This Delta deal was found by Cheapflights users on 2/3. 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.
Tue 3/106:00 am
ONT
-
HLN
1 stop5h 21m
Delta
Wed 3/111:02 pm
HLN
-
ONT
1 stop4h 26m
Delta
Deal found 2/3$217
This Delta deal was found by Cheapflights users on 2/3. 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.
Tue 3/106:00 am
ONT
-
HLN
1 stop5h 21m
Delta
Fri 3/131:02 pm
HLN
-
ONT
1 stop4h 26m
Delta
Deal found 2/3$254
This Delta deal was found by Cheapflights users on 2/3. 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.
Mon 3/96:00 am
ONT
-
HLN
2 stops29h 21m
Delta
Wed 3/111:02 pm
HLN
-
ONT
1 stop4h 26m
Delta
Deal found 2/3$290
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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.
Mon 3/96:14 am
ONT
-
HLN
1 stop8h 45m
Alaska Airlines
Fri 3/134:36 pm
HLN
-
ONT
1 stop19h 32m
Alaska Airlines
Deal found 2/3$303
This Delta deal was found by Cheapflights users on 2/3. 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.
Mon 3/95:53 pm
ONT
-
HLN
2 stops17h 28m
Delta
Fri 3/131:02 pm
HLN
-
ONT
1 stop4h 26m
Delta
Deal found 2/3$327
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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.
Fri 2/2712:02 pm
ONT
-
HLN
1 stop26h 57m
Alaska Airlines
Sun 3/14:36 pm
HLN
-
ONT
1 stop7h 56m
Alaska Airlines
Deal found 2/2$353
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 2/2612:02 pm
ONT
-
HLN
1 stop26h 57m
Alaska Airlines
Sun 3/14:36 pm
HLN
-
ONT
1 stop19h 32m
Alaska Airlines
Deal found 2/2$363
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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.
Mon 3/96:14 am
ONT
-
HLN
1 stop8h 45m
Alaska Airlines
Wed 3/114:36 pm
HLN
-
ONT
1 stop7h 08m
Alaska Airlines
Deal found 2/3$366

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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(Delta)

One-way from

$197
(Alaska Airlines)

Popular in

February

Cheapest in

March

Average price

$800
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. 15% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 4, 2026.
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

Tue 3/10

6:00 am-12:21 pm

1 stop5h 21m

Helena

Wed 3/11

1:02 pm-4:28 pm

1 stop4h 26m

$217

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 3/10

6:00 am-12:21 pm

1 stop5h 21m

Helena

Fri 3/13

1:02 pm-4:28 pm

1 stop4h 26m

$254

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 3/9

6:00 am-12:21 pm

2 stops29h 21m

Helena

Wed 3/11

1:02 pm-4:28 pm

1 stop4h 26m

$290

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 3/9

6:14 am-3:59 pm

1 stop8h 45m

Helena

Fri 3/13

4:36 pm-11:08 am

1 stop19h 32m

$303

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 3/9

5:53 pm-12:21 pm

2 stops17h 28m

Helena

Fri 3/13

1:02 pm-4:28 pm

1 stop4h 26m

$327

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 3/10

1:50 pm-9:25 pm

1 stop6h 35m

Helena

Thu 3/12

6:15 am-12:48 pm

1 stop7h 33m

$353

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 2/27

12:02 pm-3:59 pm

1 stop26h 57m

Helena

Sun 3/1

4:36 pm-11:32 pm

1 stop7h 56m

$353

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 2/26

12:02 pm-3:59 pm

1 stop26h 57m

Helena

Sun 3/1

4:36 pm-11:08 am

1 stop19h 32m

$363

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 3/9

6:14 am-3:59 pm

1 stop8h 45m

$197

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 5/18

7:41 pm-4:06 pm

1 stop19h 25m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 12 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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Helena flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 April is currently the most expensive (average of $211). 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 February 4, 2026.
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
8,138 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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
8,138 reviews
Delta
7.9
Good
8,138 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Crew

8.5

Comfort

7.9

Food

7.2

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 Delta fly from Ontario to Helena in about 5h 21m. 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 April is currently the most expensive (average of $211). 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.

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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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$184Average$410FlexibilityNo cancel feeOn-timeN/A

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